RCM4200 Users Manual Datasheet by Digi

View All Related Products | Download PDF Datasheet
RabbitCore RCM4200
C-Programmable Analog Core Module
with Serial Flash and Ethernet
Users Manual
019–0159 • 090508–E
RabbitCore RCM4200
Digi International Inc.
www.rabbit.com
RabbitCore RCM4200 Users Manual
Part Number 019-0159 • 090508–E • Printed in U.S.A.
©2006–2009 Digi International Inc. • All rights reserved.
Digi International reserves the right to make changes and
improvements to its products without providing notice.
Trademarks
Rabbit, RabbitCore, and Dynamic C are registered trademarks of Digi International Inc.
Rabbit 4000 is a trademark of Digi International Inc.
No part of the contents of this manual may be reproduced or transmitted in any form or by any means
without the express written permission of Digi International.
Permission is granted to make one or more copies as long as the copyright page contained therein is
included. These copies of the manuals may not be let or sold for any reason without the express written
permission of Digi International.
The latest revision of this manual is available on the Rabbit Web site, www.rabbit.com,
for free, unregistered download.
User’s Manual
TABLE OF CONTENTS
Chapter 1. Introduction 1
1.1 RCM4200 Features...............................................................................................................................2
1.2 Advantages of the RCM4200 ...............................................................................................................4
1.3 Development and Evaluation Tools......................................................................................................5
1.3.1 RCM4200 Development Kit.........................................................................................................5
1.3.2 Software ........................................................................................................................................6
1.3.3 Online Documentation ..................................................................................................................6
Chapter 2. Getting Started 7
2.1 Install Dynamic C .................................................................................................................................7
2.2 Hardware Connections..........................................................................................................................8
2.2.1 Step 1 — Prepare the Prototyping Board for Development..........................................................8
2.2.2 Step 2 — Attach Module to Prototyping Board............................................................................9
2.2.3 Step 3 — Connect Programming Cable......................................................................................10
2.2.4 Step 4 — Connect Power............................................................................................................11
2.3 Run a Sample Program .......................................................................................................................12
2.3.1 Troubleshooting ..........................................................................................................................12
2.4 Where Do I Go From Here? ...............................................................................................................13
2.4.1 Technical Support .......................................................................................................................13
Chapter 3. Running Sample Programs 15
3.1 Introduction.........................................................................................................................................15
3.2 Sample Programs ................................................................................................................................16
3.2.1 Use of Serial Flash......................................................................................................................18
3.2.2 Serial Communication.................................................................................................................19
3.2.3 A/D Converter Inputs (RCM4200 only).....................................................................................22
3.2.3.1 Downloading and Uploading Calibration Constants.......................................................... 23
3.2.4 Real-Time Clock.........................................................................................................................25
Chapter 4. Hardware Reference 27
4.1 RCM4200 Digital Inputs and Outputs................................................................................................28
4.1.1 Memory I/O Interface .................................................................................................................34
4.1.2 Other Inputs and Outputs............................................................................................................34
4.2 Serial Communication ........................................................................................................................35
4.2.1 Serial Ports..................................................................................................................................35
4.2.1.1 Using the Serial Ports......................................................................................................... 36
4.2.2 Ethernet Port ...............................................................................................................................37
4.2.3 Programming Port.......................................................................................................................38
4.3 Programming Cable ............................................................................................................................39
4.3.1 Changing Between Program Mode and Run Mode ....................................................................39
4.3.2 Standalone Operation of the RCM4200......................................................................................40
RabbitCore RCM4200
4.4 A/D Converter (RCM4200 only) ....................................................................................................... 41
4.4.1 A/D Converter Power Supply..................................................................................................... 43
4.5 Other Hardware.................................................................................................................................. 44
4.5.1 Clock Doubler ............................................................................................................................ 44
4.5.2 Spectrum Spreader...................................................................................................................... 44
4.6 Memory.............................................................................................................................................. 45
4.6.1 SRAM......................................................................................................................................... 45
4.6.2 Flash EPROM............................................................................................................................. 45
4.6.3 Serial Flash................................................................................................................................. 45
Chapter 5. Software Reference 47
5.1 More About Dynamic C..................................................................................................................... 47
5.2 Dynamic C Function Calls................................................................................................................ 49
5.2.1 Digital I/O................................................................................................................................... 49
5.2.2 Serial Communication Drivers................................................................................................... 49
5.2.3 User Block.................................................................................................................................. 49
5.2.4 SRAM Use.................................................................................................................................. 50
5.2.5 RCM4200 Cloning ..................................................................................................................... 50
5.2.6 Serial Flash Drivers .................................................................................................................... 51
5.2.7 Prototyping Board Function Calls.............................................................................................. 52
5.2.7.1 Board Initialization............................................................................................................ 52
5.2.7.2 Alerts.................................................................................................................................. 53
5.2.8 Analog Inputs (RCM4200 only)................................................................................................. 54
5.3 Upgrading Dynamic C ....................................................................................................................... 71
5.3.1 Add-On Modules........................................................................................................................ 71
Chapter 6. Using the TCP/IP Features 73
6.1 TCP/IP Connections........................................................................................................................... 73
6.2 TCP/IP Primer on IP Addresses......................................................................................................... 75
6.2.1 IP Addresses Explained.............................................................................................................. 77
6.2.2 How IP Addresses are Used ....................................................................................................... 78
6.2.3 Dynamically Assigned Internet Addresses................................................................................. 79
6.3 Placing Your Device on the Network ................................................................................................ 80
6.4 Running TCP/IP Sample Programs.................................................................................................... 81
6.4.1 How to Set IP Addresses in the Sample Programs..................................................................... 82
6.4.2 How to Set Up your Computer for Direct Connect.................................................................... 83
6.5 Run the PINGME.C Sample Program................................................................................................ 84
6.6 Running Additional Sample Programs With Direct Connect ............................................................ 84
6.7 Where Do I Go From Here?............................................................................................................... 85
Appendix A. RCM4200 Specifications 87
A.1 Electrical and Mechanical Characteristics ........................................................................................ 88
A.1.1 A/D Converter ........................................................................................................................... 92
A.1.2 Headers...................................................................................................................................... 93
A.2 Rabbit 4000 DC Characteristics........................................................................................................ 94
A.3 I/O Buffer Sourcing and Sinking Limit............................................................................................. 95
A.4 Bus Loading ...................................................................................................................................... 95
A.5 Conformal Coating............................................................................................................................ 98
A.6 Jumper Configurations ...................................................................................................................... 99
Appendix B. Prototyping Board 101
B.1 Introduction ..................................................................................................................................... 102
B.1.1 Prototyping Board Features ..................................................................................................... 103
B.2 Mechanical Dimensions and Layout ............................................................................................... 105
B.3 Power Supply................................................................................................................................... 106
User’s Manual
B.4 Using the Prototyping Board............................................................................................................107
B.4.1 Adding Other Components.......................................................................................................109
B.4.2 Measuring Current Draw..........................................................................................................109
B.4.3 Analog Features (RCM4200 only)...........................................................................................110
B.4.3.1 A/D Converter Inputs ...................................................................................................... 110
B.4.3.2 Thermistor Input.............................................................................................................. 112
B.4.3.3 A/D Converter Calibration .............................................................................................. 112
B.4.4 Serial Communication..............................................................................................................113
B.4.4.1 RS-232............................................................................................................................. 114
B.5 Prototyping Board Jumper Configurations ......................................................................................115
Appendix C. Power Supply 119
C.1 Power Supplies.................................................................................................................................119
C.1.1 Battery Backup.........................................................................................................................119
C.1.2 Battery-Backup Circuit.............................................................................................................120
C.1.3 Reset Generator ........................................................................................................................121
Index 123
Schematics 127
RabbitCore RCM4200
User’s Manual 1
1. INTRODUCTION
The RCM4200 series of RabbitCore modules is one of the next
generation of core modules that take advantage of new Rabbit®
4000 features such as hardware DMA, clock speeds of up to
60 MHz, I/O lines shared with up to six serial ports and four
levels of alternate pin functions that include variable-phase
PWM, auxiliary I/O, quadrature decoder, and input capture.
Coupled with more than 500 new opcode instructions that help to
reduce code size and improve processing speed, this equates to a
core module that is fast, efficient, and the ideal solution for a wide
range of embedded applications. The RCM4200 also features an
integrated 10/100Base-T Ethernet port, an A/D converter, and a
serial flash memory for mass storage.
Each production model has a Development Kit with the essentials
that you need to design your own microprocessor-based system,
and includes a complete Dynamic C software development sys-
tem. The Development Kits also contains a Prototyping Board
that will allow you to evaluate the specific RCM4200 module and
to prototype circuits that interface to the module. You will also
be able to write and test software for the RCM4200 modules.
Throughout this manual, the term RCM4200 refers to the complete series of RCM4200
RabbitCore modules unless other production models are referred to specifically.
The RCM4200 has a Rabbit 4000 microprocessor operating at up to 58.98 MHz, static
RAM, flash memory, serial flash mass-storage option, an 8-channel A/D converter, two
clocks (main oscillator and timekeeping), and the circuitry necessary for reset and man-
agement of battery backup of the Rabbit 4000’s internal real-time clock and 512K of static
RAM. One 50-pin header brings out the Rabbit 4000 I/O bus lines, parallel ports, A/D
converter channels, and serial ports.
The RCM4200 receives its +3.3 V power from the customer-supplied motherboard on
which it is mounted. The RCM4200 can interface with all kinds of CMOS-compatible
digital devices through the motherboard.
2RabbitCore RCM4200
1.1 RCM4200 Features
Small size: 1.84" × 2.42" × 0.84" (47 mm × 61 mm × 21 mm)
Microprocessor: Rabbit 4000 running
at up to 58.98 MHz
Up to 33 general-purpose I/O lines configurable with up to four alternate functions
3.3 V I/O lines with low-power modes down to 2 kHz
Up to six CMOS-compatible serial ports — f
our ports are configurable as a clocked
serial ports (SPI), and two ports are configurable as SDLC/HDLC serial ports.
Combinations of up to eight single-ended or four differential 12-bit analog inputs
(RCM4200 only)
Alternate I/O bus can be configured for 8 data lines and 6 address lines (shared with
parallel I/O lines), I/O read/write
512K flash memory, 512K SRAM, and a fixed mass-storage flash-memory option that
may be used with the standardized directory structure supported by the Dynamic C FAT
File System module
Real-time clock
Watchdog supervisor
User’s Manual 3
There are two RCM4200 production models. Table 1 summarizes their main features.
The RCM4200 is programmed over a standard PC USB port through a programming cable
supplied with the Development Kit.
NOTE: The RabbitLink cannot be used to program RabbitCore modules based on the
Rabbit 4000 microprocessor.
Appendix A provides detailed specifications for the RCM4200.
Table 1. RCM4200 Features
Feature RCM4200 RCM4210
Microprocessor Rabbit® 4000 at 58.98 MHz Rabbit® 4000 at 29.49 MHz
Data SRAM 512K
Fast Program-Execution
SRAM 512K —
Flash Memory (program) 512K
Flash Memory
(mass data storage) 8 Mbytes (serial flash) 4 Mbytes (serial flash)
A/D Converter 12 bits
Serial Ports
4 high-speed, CMOS-compatible
ports:
all 4 configurable as asynchro-
nous (with IrDA), 4 as clocked
serial (SPI)
1 asynchronous clocked serial
port shared with programming
port
1 clocked serial port shared with
serial flash
1 clocked serial port shared with
A/D converter
5 high-speed, CMOS-compatible
ports:
all 5 configurable as asynchro-
nous (with IrDA), 4 as clocked
serial (SPI), and 1 as
SDLC/HDLC
1 clocked serial port shared with
serial flash
1 asynchronous clocked serial
port dedicated for programming
4RabbitCore RCM4200
1.2 Advantages of the RCM4200
Fast time to market using a fully engineered, “ready-to-run/ready-to-program” micro-
processor core.
Competitive pricing when compared with the alternative of purchasing and assembling
individual components.
Easy C-language program development and debugging
Rabbit Field Utility to download compiled Dynamic C .bin files, and cloning board
options for rapid production loading of programs.
Generous memory size allows large programs with tens of thousands of lines of code,
and substantial data storage.
Accessory Parts for Prototyping Board “MIC-am ammo Getting Started Prototyping Board Instructions Figure 1. RCM42aD Development Kit User's Manual
Users Manual 5
1.3 Development and Evaluation Tools
1.3.1 RCM4200 Development Kit
The RCM4200 Development Kit contains the hardware essentials you will need to use the
RCM4200 module. The items in the Development Kit and their use are as follows.
RCM4200 module.
Prototyping Board.
Universal AC adapter, 12 V DC, 1 A (includes Canada/Japan/U.S., Australia/N.Z.,
U.K., and European style plugs). Development Kits sold in North America may contain
an AC adapter with only a North American style plug.
USB programming cable with 10-pin header.
10-pin header to DB9 serial cable.
Dynamic C® CD-ROM, with complete product documentation on disk.
Getting Started instructions.
A bag of accessory parts for use on the Prototyping Board.
Rabbit 4000 Processor Easy Reference poster.
Registration card.
Figure 1. RCM4200 Development Kit
Rabbit and Dynamic C are registered trademarks of Rabbit Semiconductor Inc.
RabbitCore RCM4200
The RCM4200 RabbitCore module features an onboard A/D converter and 10/100Base-T Ethernet, allow-
ing you to create a low-cost, low-power, network as part of your control solution for your embedded
application. These Getting Started instructions included with the Development Kit will help you get your
RCM4200 up and running so that you can run the sample programs to explore its capabilities and develop
your own applications.
Development Kit Contents
The RCM4200 Development Kit contains the following items:
RCM4200 module.
Prototyping Board.
Universal AC adapter, 12 V DC, 1 A (includes Canada/Japan/U.S., Australia/N.Z., U.K., and European
style plugs). Development Kits sold in North America may contain an AC adapter with only a North
American style plug.
USB programming cable with 10-pin header.
10-pin header to DB9 serial cable.
Dynamic C®CD-ROM, with complete product documentation on disk.
Getting Started instructions.
Plastic and metal standoffs with 4-40 screws and washers.
A bag of accessory parts for use on the Prototyping
Board.
Rabbit 4000 Processor Easy Reference poster.
Registration card.
Visit our online Rabbit store at www.rabbit.com/store/ for
the latest information on peripherals and accessories that
are available for all RCM4200 RabbitCore module models.
Installing Dynamic C®
Insert the CD from the Development Kit in
your PC’s CD-ROM drive. If the installation
does not auto-start, run the setup.exe pro-
gram in the root directory of the Dynamic C
CD. Install any Dynamic C modules after you
install Dynamic C.
Getting Started
Instructions Prototyping Board
Accessory Parts for
Prototyping Board
Serial
Cable
Programming
Cable
D1
R1
PWR
DS1
GND
J1
U1
C1
GND
C2
JP1
C3
D2
JP2
C4
+3.3 V
J2
R2
BT1
1
S1
RESET
RXD TXD
TXC RXC
GND
J4
UX29
RX81
RX87
CX41
RX83
RX11
CX39
UX30
UX10
UX12
UX14
UX16
RX79
CX29CX17
RX67
UX45
RX85
GND
GND
GND
1
R24
R22
R21
R23
CX23 RX77
1
R27
R28
JP25
CX25
RX75
RX73 CX27
DS3
S3S2
DS2
J3
UX49 UX4
UX47
+5 V
GND
+3.3 V
RCM1
U2
/RST_OUT
/IOWR
VBAT
EXT
PA1
PA3
PA5
PA7
PB1
PB3
PB5
PB7
PC1
PC3
PC5
PC7
PE1
PE3
PE5
PE7
PD1
LN1
PD3
LN3
PD5
LN5
PD7
LN7
VREF
GND
/IORD
/RST_IN
PA0
PA2
PA4
PA6
PB0
PB2
PB4
PB6
PC0
PC2
PC4
PC6
PE0
PE2
PE4
PE6
PD0
LN0
PD2
LN2
PD4
LN4
PD6
LN6
CVT
AGND
JP24
JP23
C14
C12
C10
C8
C7
C9
C11
C13
R10
R8
R6
R4
R3
R5
R7
R20
R18
R16
R14
R13
R15
R17
R29
JP11
JP15
JP19
JP21
JP22
JP20
JP17
JP13
R19
R9
RX57
RX55
RX97
RX49
UX33
UX31
RX89
UX3
UX37UX42UX41
RX63
RX65RX61
RX59
R26
R25
Q1
C15
C19C20
U3
C18
C17
JP16
JP6
JP5
JP12
JP4
JP3
JP14
JP8
JP7
JP18
JP9
JP10
C16
L1C6
C5
AGND
CVT
LN6IN
LN4IN
LN2IN
LN0IN
VREF
LN7IN
LN5IN
LN3IN
LN1IN
AGND
AGND
R11R12
RX47
RX43
Universal
AC Adapter
with Plugs
C20 L1 C21
R5
R6
R7
R8
R9
R10
R11
R12
R13
C9
C10
C11
C12
C13
C14
C15
C16
RP1
JP6
JP5
R20
JP4
C3
U4
TP2
J1
R38 R2
R1
U1
C8
C1
U2
C5
C4
R3 U3
R37
R21
U5
C17
C18
C52
C56
R23
R22
U6
JP3
R41
C6
C7
R4
U9
C53
1
40 41
80
PROG
DIAG
6RabbitCore RCM4200
1.3.2 Software
The RCM4200 is programmed using version 10.09 or later of Dynamic C. A compatible
version is included on the Development Kit CD-ROM.
Rabbit Semiconductor also offers add-on Dynamic C modules containing the popular
µC/OS-II real-time operating system, the FAT file system, as well as PPP, Advanced
Encryption Standard (AES), and other select libraries. In addition to the Web-based
technical support included at no extra charge, a one-year telephone-based technical
support module is also available for purchase. Visit our Web site at www.rabbit.com or
contact your Rabbit Semiconductor sales representative or authorized distributor for
further information.
1.3.3 Online Documentation
The online documentation is installed along with Dynamic C, and an icon for the docu-
mentation menu is placed on the workstation’s desktop. Double-click this icon to reach the
menu. If the icon is missing, use your browser to find and load default.htm in the docs
folder, found in the Dynamic C installation folder.
The latest versions of all documents are always available for free, unregistered download
from our Web sites as well.
User’s Manual 7
2. GETTING STARTED
This chapter describes the RCM4200 hardware in more detail, and
explains how to set up and use the accompanying Prototyping Board.
NOTE: This chapter (and this manual) assume that you have the RCM4200 Development
Kit. If you purchased an RCM4200 module by itself, you will have to adapt the infor-
mation in this chapter and elsewhere to your test and development setup.
2.1 Install Dynamic C
To develop and debug programs for the RCM4200 series of modules (and for all other
Rabbit Semiconductor hardware), you must install and use Dynamic C.
If you have not yet installed Dynamic C version 10.09 (or a later version), do so now by
inserting the Dynamic C CD from the Development Kit in your PC’s CD-ROM drive. If
autorun is enabled, the CD installation will begin automatically.
If autorun is disabled or the installation does not start, use the Windows Start | Run menu
or Windows Disk Explorer to launch setup.exe from the root folder of the CD-ROM.
The installation program will guide you through the installation process. Most steps of the
process are self-explanatory.
Dynamic C uses a COM (serial) port to communicate with the target development system.
The installation allows you to choose the COM port that will be used. The default selec-
tion is COM1. You may select any available port for Dynamic C’s use. If you are not cer-
tain which port is available, select COM1. This selection can be changed later within
Dynamic C.
NOTE: The installation utility does not check the selected COM port in any way. Speci-
fying a port in use by another device (mouse, modem, etc.) may lead to a message such
as "could not open serial port" when Dynamic C is started.
Once your installation is complete, you will have up to three new icons on your PC desk-
top. One icon is for Dynamic C, another opens the documentation menu, and the third is for
the Rabbit Field Utility, a tool used to download precompiled software to a target system.
If you have purchased any of the optional Dynamic C modules, install them after installing
Dynamic C. The modules may be installed in any order. You must install the modules in
the same directory where Dynamic C was installed.
8RabbitCore RCM4200
2.2 Hardware Connections
There are three steps to connecting the Prototyping Board for use with Dynamic C and the
sample programs:
1. Prepare the Prototyping Board for Development.
2. Attach the RCM4200 module to the Prototyping Board.
3. Connect the programming cable between the RCM4200 and the PC.
4. Connect the power supply to the Prototyping Board.
2.2.1 Step 1 — Prepare the Prototyping Board for Development
Snap in four of the plastic standoffs supplied in the bag of accessory parts from the Devel-
opment Kit in the holes at the corners as shown in Figure 2.
Figure 2. Insert Standoffs
D1
R1
PWR
DS1
GND
J1
U1
C1
GND
C2
JP1
C3
D2
JP2
C4
+3.3 V
J2
R2
BT1
1
S1
RESET
RXD TXD
TXC RXC
GND
J4
UX29
RX81
RX87
CX41
RX83
RX11
CX39
UX30
UX10
UX12
UX14
UX16
RX79
CX29 CX17
RX67
UX45
RX85
GND
GND
GND
1
R24
R22
R21
R23
CX23 RX77
1
R27
R28
JP25
CX25
RX75
RX73 CX27
DS3
S3S2
DS2
J3
UX49 UX4
UX47
+5 V
GND
+3.3 V
RCM1
U2
/RST_OUT
/IOWR
VBAT
EXT
PA1
PA3
PA5
PA7
PB1
PB3
PB5
PB7
PC1
PC3
PC5
PC7
PE1
PE3
PE5
PE7
PD1
LN1
PD3
LN3
PD5
LN5
PD7
LN7
VREF
GND
/IORD
/RST_IN
PA0
PA2
PA4
PA6
PB0
PB2
PB4
PB6
PC0
PC2
PC4
PC6
PE0
PE2
PE4
PE6
PD0
LN0
PD2
LN2
PD4
LN4
PD6
LN6
CVT
AGND
JP24
JP23
C14
C12
C10
C8
C7
C9
C11
C13
R10
R8
R6
R4
R3
R5
R7
R20
R18
R16
R14
R13
R15
R17
R29
JP11
JP15
JP19
JP21
JP22
JP20
JP17
JP13
R19
R9
RX57
RX55
RX97
RX49
UX33UX31
RX89
UX3
UX37 UX42 UX41
RX63
RX65 RX61
RX59
R26
R25
Q1
C15
C19 C20
U3
C18
C17
JP16
JP6
JP5
JP12
JP4
JP3
JP14
JP8
JP7
JP18
JP9
JP10
C16
L1C6
C5
AGND
CVT
LN6IN
LN4IN
LN2IN
LN0IN
VREF
LN7IN
LN5IN
LN3IN
LN1IN
AGND
AGND
R11 R12
RX47
RX43
ooooooooooofl fl ooooooooooooo oooooooooooooo oooooooooooooguu‘ Figure 3. Install the Module on the Prototyping Board NOTE: It is important that you line up the pins on header 12 of the module exactly with socket RCMl on the Prototyping Board. The header pins may become bent or damaged if the pin alignment is offset, and the module will not work. Permanent electrical dam- age to the module may also result ifa misaligned module is powered up. Press the module’s pins gently into the Prototyping Board socketipress down in the are above the header pins. For additional integrity, you may secure the RCM4200 to the st offs from the top using the remaining two screws and washers. User's Manual
Users Manual 9
2.2.2 Step 2 — Attach Module to Prototyping Board
Turn the RCM4200 module so that the mounting holes line up with the corresponding
holes on the Prototyping Board. Insert the metal standoffs as shown in Figure 3, secure
them from the bottom using two screws and washers, then insert the module’s header J2
on the bottom side into socket RCM1 on the Prototyping Board.
Figure 3. Install the Module on the Prototyping Board
NOTE: It is important that you line up the pins on header J2 of the module exactly with
socket RCM1 on the Prototyping Board. The header pins may become bent or damaged
if the pin alignment is offset, and the module will not work. Permanent electrical dam-
age to the module may also result if a misaligned module is powered up.
Press the module’s pins gently into the Prototyping Board socket—press down in the area
above the header pins. For additional integrity, you may secure the RCM4200 to the stand-
offs from the top using the remaining two screws and washers.
D1
R1
PWR
DS1
GND
J1
U1
C1
GND
C2
JP1
C3
D2
JP2
C4
+3.3 V
J2
R2
BT1
1
S1
RESET
RXD TXD
TXC RXC
GND
J4
UX29
RX81
RX87
CX41
RX83
RX11
CX39
UX30
UX10
UX12
UX14
UX16
RX79
CX29 CX17
RX67
UX45
RX85
GND
GND
GND
1
R24
R22
R21
R23
CX23 RX77
1
R27
R28
JP25
CX25
RX75
RX73 CX27
DS3
S3S2
DS2
J3
UX49 UX4
UX47
+5 V
GND
+3.3 V
RCM1
U2
/RST_OUT
/IOWR
VBAT
EXT
PA1
PA3
PA5
PA7
PB1
PB3
PB5
PB7
PC1
PC3
PC5
PC7
PE1
PE3
PE5
PE7
PD1
LN1
PD3
LN3
PD5
LN5
PD7
LN7
VREF
GND
/IORD
/RST_IN
PA0
PA2
PA4
PA6
PB0
PB2
PB4
PB6
PC0
PC2
PC4
PC6
PE0
PE2
PE4
PE6
PD0
LN0
PD2
LN2
PD4
LN4
PD6
LN6
CVT
AGND
JP24
JP23
C14
C12
C10
C8
C7
C9
C11
C13
R10
R8
R6
R4
R3
R5
R7
R20
R18
R16
R14
R13
R15
R17
R29
JP11
JP15
JP19
JP21
JP22
JP20
JP17
JP13
R19
R9
RX57
RX55
RX97
RX49
UX33UX31
RX89
UX3
UX37 UX42 UX41
RX63
RX65 RX61
RX59
R26
R25
Q1
C15
C19 C20
U3
C18
C17
JP16
JP6
JP5
JP12
JP4
JP3
JP14
JP8
JP7
JP18
JP9
JP10
C16
L1C6
C5
AGND
CVT
LN6IN
LN4IN
LN2IN
LN0IN
VREF
LN7IN
LN5IN
LN3IN
LN1IN
AGND
AGND
R11 R12
RX47
RX43
C43
L2
3
41
Y3
C82
R5 R2
J1
C76
R3
R51
R31
R20
C81
C58
C67
C88
J3
JP11
JP10
JP12
JP1
JP2
JP9
JP6
JP7
JP3
JP5
JP4
C3
C2
C17
C16
R6
R8
R46
R45
R43
R44
R39
R42
U1
R7
C1
C86
L1
C74
U15
C75
R40
R41
JP14
JP15
JP13
U14
C85
C78
L7
C72
C65
C87
C57 U13
R34
R35
R33
R32
Q3
C77
C5
Y4
R14
R12
U4
C24 JP16R13
DS1
LINK
SPEED
FDX
DS2
DS3
R47
R48
R49
C33
C32
C31
R50
C26
R52 C25
C19
R4 C20 C18
U3
Q1
C7
R36
R29
C8
C9 C10
C6
C11 C12
JP8
C15 R27
R11
R16
Y2
U2
R9
C13
C14
C39
U5
C27
C21 R1 R10
D1
R22
C28
C29
C36
C37
C38
C30
C34
C35
R18
U7
U6
R21
R19
R15
C23
R23
RCM4200
RCM1
Line up mounting
holes with holes
on Prototyping Board.
Insert standoffs
between
mounting holes and
Prototyping Board.
2.2.3 Step 3 — Connect Programming Cable The programming cable connects the module to the PC ninning D programs and to monitor the module during debugging. Connect the 107pin connector of the programming cable labeled P the RCM4200 as shown in Figure 4. Be sure to orient the marked ( cable towards pin 1 of the connector. (Do not use the DIAG conne normal serial connection.) O o 0‘“ o oogoooooogqoqooooooocoooo ~ 0 a 0 Fabio o Figure 4. Connect Programming Cable and Power Supp NOTE: Never disconnect the programming cable by pulling on the ri Carefully pull on the connector to remove it from the header. NOTE: Either a serial or a USB programming cable was supplied wit Kit. If you have a serial programming cable, an RS-232/USB conve No. 20-151-0178) is available to allow you to use the serial program USB port. Depending on the programming cable, connect the other end to a COM p on your PC.
10 RabbitCore RCM4200
2.2.3 Step 3 — Connect Programming Cable
The programming cable connects the module to the PC running Dynamic C to download
programs and to monitor the module during debugging.
Connect the 10-pin connector of the programming cable labeled PROG to header J1 on
the RCM4200 as shown in Figure 4. Be sure to orient the marked (usually red) edge of the
cable towards pin 1 of the connector. (Do not use the DIAG connector, which is used for a
normal serial connection.)
Figure 4. Connect Programming Cable and Power Supply
NOTE: Never disconnect the programming cable by pulling on the ribbon cable.
Carefully pull on the connector to remove it from the header.
NOTE: Either a serial or a USB programming cable was supplied with the Development
Kit. If you have a serial programming cable, an RS-232/USB converter (Rabbit Part
No. 20-151-0178) is available to allow you to use the serial programming cable with a
USB port.
Depending on the programming cable, connect the other end to a COM port or a USB port
on your PC.
D1
R1
PWR
DS1
GND
J1
U1
C1
GND
C2
JP1
C3
D2
JP2
C4
+3.3 V
J2
R2
BT1
1
S1
RESET
RXD TXD
TXC RXC
GND
J4
UX29
RX81
RX87
CX41
RX83
RX11
CX39
UX30
UX10
UX12
UX14
UX16
RX79
CX29 CX17
RX67
UX45
RX85
GND
GND
GND
1
R24
R22
R21
R23
CX23 RX77
1
R27
R28
JP25
CX25
RX75
RX73 CX27
DS3
S3S2
DS2
J3
UX49 UX4
UX47
+5 V
GND
+3.3 V
RCM1
U2
/RST_OUT
/IOWR
VBAT
EXT
PA1
PA3
PA5
PA7
PB1
PB3
PB5
PB7
PC1
PC3
PC5
PC7
PE1
PE3
PE5
PE7
PD1
LN1
PD3
LN3
PD5
LN5
PD7
LN7
VREF
GND
/IORD
/RST_IN
PA0
PA2
PA4
PA6
PB0
PB2
PB4
PB6
PC0
PC2
PC4
PC6
PE0
PE2
PE4
PE6
PD0
LN0
PD2
LN2
PD4
LN4
PD6
LN6
CVT
AGND
JP24
JP23
C14
C12
C10
C8
C7
C9
C11
C13
R10
R8
R6
R4
R3
R5
R7
R20
R18
R16
R14
R13
R15
R17
R29
JP11
JP15
JP19
JP21
JP22
JP20
JP17
JP13
R19
R9
RX57
RX55
RX97
RX49
UX33UX31
RX89
UX3
UX37 UX42 UX41
RX63
RX65 RX61
RX59
R26
R25
Q1
C15
C19 C20
U3
C18
C17
JP16
JP6
JP5
JP12
JP4
JP3
JP14
JP8
JP7
JP18
JP9
JP10
C16
L1C6
C5
AGND
CVT
LN6IN
LN4IN
LN2IN
LN0IN
VREF
LN7IN
LN5IN
LN3IN
LN1IN
AGND
AGND
R11 R12
RX47
RX43
C43
L2
3
41
Y3
C82
R5 R2
J1
C76
R3
R51
R31
R20
C81
C58
C67
C88
J3
JP11
JP10
JP12
JP1
JP2
JP9
JP6
JP7
JP3
JP5
JP4
C3
C2
C17
C16
R6
R8
R46
R45
R43
R44
R39
R42
U1
R7
C1
C86
L1
C74
U15
C75
R40
R41
JP14
JP15
JP13
U14
C85
C78
L7
C72
C65
C87
C57 U13
R34
R35
R33
R32
Q3
C77
C5
Y4
R14
R12
U4
C24 JP16R13
DS1
LINK
SPEED
FDX
DS2
DS3
R47
R48
R49
C33
C32
C31
R50
C26
R52 C25
C19
R4 C20 C18
U3
Q1
C7
R36
R29
C8
C9 C10
C6
C11 C12
JP8
C15 R27
R11
R16
Y2
U2
R9
C13
C14
C39
U5
C27
C21 R1 R10
D1
R22
C28
C29
C36
C37
C38
C30
C34
C35
R18
U7
U6
R21
R19
R15
C23
R23
RESET
AC Adapter
Remove slot cover,
insert tab into slot
Snap plug into place
2
1
Assemble
AC Adapter
3-pin
power connector
J1
Colored
edge
PROG
DIAG
Programming
Cable
PROG
J1
To
PC COM port
or USB port
User’s Manual 11
If you are using a USB programming cable, your PC should recognize the new USB hard-
ware, and the LEDs in the shrink-wrapped area of the programming cable will flash — if
you get an error message, you will have to install USB drivers. Drivers for Windows XP
are available in the Dynamic C Drivers\Rabbit USB Programming Cable\
WinXP_2K folder — double-click DPInst.exe to install the USB drivers. Drivers for
other operating systems are available online at www.ftdichip.com/Drivers/VCP.htm.
2.2.4 Step 4 — Connect Power
Once all the other connections have been made, you can connect power to the Prototyping
Board.
If you have the universal AC adapter, prepare the AC adapter for the country where it will
be used by selecting the appropriate plug. Snap in the top of the plug assembly into the slot
at the top of the AC adapter as shown in Figure 4, then press down on the plug until it
clicks into place.
Connect the AC adapter to 3-pin header J1 on the Prototyping Board as shown in Figure 4
above. The connector may be attached either way as long as it is not offset to one side—
the center pin of J1 is always connected to the positive terminal, and either edge pin is
ground.
Plug in the AC adapter. The PWR LED on the Prototyping Board next to the power con-
nector at J1 should light up. The RCM4200 and the Prototyping Board are now ready to be
used.
NOTE: A RESET button is provided on the Prototyping Board next to the battery holder
to allow a hardware reset without disconnecting power.
To power down the Prototyping Board, unplug the power connector from J1. You should
disconnect power before making any circuit adjustments in the prototyping area, changing
any connections to the board, or removing the RCM4200 from the Prototyping Board.
12 RabbitCore RCM4200
2.3 Run a Sample Program
Once the RCM4200 is connected as described in the preceding pages, start Dynamic C by
double-clicking on the Dynamic C icon on your desktop or in your Start menu. For the
RCM4200 model, select Code and BIOS in Flash, Run in RAM on the “Compiler” tab in the
Dynamic C Options > Project Options menu. (Select Code and BIOS in Flash for the
RCM4210.) Click OK.
If you are using a USB port to connect your computer to the RCM4200, click on the
“Communications” tab and verify that Use USB to Serial Converter is selected to sup-
port the USB programming cable. Click OK. You may have to determine which COM port
was assigned to the RS-232/USB converter. Open Control Panel > System > Hardware >
Device Manager > Ports and identify which COM port is used for the USB connection.
In Dynamic C, select Options > Project Options, then select this COM port on the
Communications tab, then click OK. You may type the COM port number followed by
Enter on your computer keyboard if the COM port number is outside the range on the
dropdown menu.
Now find the file PONG.C, which is in the Dynamic C SAMPLES folder. To run the pro-
gram, open it with the File menu, compile it using the Compile menu, and then run it by
selecting Run in the Run menu. The STDIO window will open on your PC and will dis-
play a small square bouncing around in a box.
2.3.1 Troubleshooting
If you receive the message No Rabbit Processor Detected, the programming
cable may be connected to the wrong COM port, a connection may be faulty, or the target
system may not be powered up. First, check to see that the power LED on the Prototyping
Board is lit. If the LED is lit, check both ends of the programming cable to ensure that it is
firmly plugged into the PC and the programming header on the RCM4200 with the marked
(colored) edge of the programming cable towards pin 1 of the programming header. Ensure
that the module is firmly and correctly installed in its connectors on the Prototyping Board.
If Dynamic C appears to compile the BIOS successfully, but you then receive a communi-
cation error message when you compile and load a sample program, it is possible that your
PC cannot handle the higher program-loading baud rate. Try changing the maximum
download rate to a slower baud rate as follows.
Locate the Serial Options dialog in the Dynamic C Options > Project Options >
Communications menu. Select a slower Max download baud rate.
If a program compiles and loads, but then loses target communication before you can
begin debugging, it is possible that your PC cannot handle the default debugging baud
rate. Try lowering the debugging baud rate as follows.
Locate the Serial Options dialog in the Dynamic C Options > Project Options >
Communications menu. Choose a lower debug baud rate.
User’s Manual 13
If there are no faults with the hardware, check that you have selected the correct COM port
within Dynamic C as explained for the USB port above. Press <Ctrl-Y> to force Dynamic C
to recompile the BIOS. If Dynamic C still reports it is unable to locate the target system,
repeat the above steps for another available COM port. You should receive a Bios
compiled successfully message once this step is completed successfully.
2.4 Where Do I Go From Here?
If the sample program ran fine, you are now ready to go on to the sample programs in
Chapter 3 and to develop your own applications. The sample programs can be easily
modified for your own use. The user's manual also provides complete hardware reference
information and software function calls for the RCM4200 series of modules and the
Prototyping Board.
For advanced development topics, refer to the Dynamic C Users Manual, also in the
online documentation set.
2.4.1 Technical Support
NOTE: If you purchased your RCM4200 through a distributor or through a Rabbit partner,
contact the distributor or partner first for technical support.
If there are any problems at this point:
Use the Dynamic C Help menu to get further assistance with Dynamic C.
Check the Rabbit Semiconductor Technical Bulletin Board and forums at
www.rabbit.com/support/bb/ and at www.rabbit.com/forums/.
Use the Technical Support e-mail form at www.rabbit.com/support/.
14 RabbitCore RCM4200
User’s Manual 15
3. RUNNING SAMPLE PROGRAMS
To develop and debug programs for the RCM4200 (and for all
other Rabbit Semiconductor hardware), you must install and use
Dynamic C. This chapter provides a tour of its major features
with respect to the RCM4200.
3.1 Introduction
To help familiarize you with the RCM4200 modules, Dynamic C includes several sample
programs. Loading, executing and studying these programs will give you a solid hands-on
overview of the RCM4200’s capabilities, as well as a quick start with Dynamic C as an
application development tool.
NOTE:
The sample programs assume that you have at least an elementary grasp of ANSI C.
If you do not, see the introductory pages of the Dynamic C User’s Manual for a sug-
gested reading list.
In order to run the sample programs discussed in this chapter and elsewhere in this manual,
1. Your module must be plugged in to the Prototyping Board as described in Chapter 2,
“Getting Started.”
2. Dynamic C must be installed and running on your PC.
3. The programming cable must connect the programming header on the module to your
PC.
4. Power must be applied to the module through the Prototyping Board.
Refer to Chapter 2, “Getting Started,” if you need further information on these steps.
To run a sample program, open it with the File menu (if it is not still open), then compile
and run it by pressing F9.
Each sample program has comments that describe the purpose and function of the pro-
gram. Follow the instructions at the beginning of the sample program.
More complete information on Dynamic C is provided in the Dynamic C Users Manual.
< prom—board="" led;="">>> From PC keyboard: Select 2:082 or 3:DS3 to toggle LEDs < press="" '9'="" to="" quit="">
16 RabbitCore RCM4200
3.2 Sample Programs
Of the many sample programs included with Dynamic C, several are specific to the
RCM4200 modules. These programs will be found in the SAMPLES\RCM4200 folder.
CONTROLLED.C—Demonstrates use of the digital outputs by having you turn LEDs
DS2 and DS3 on the Prototyping Board on or off from the STDIO window on your PC.
Parallel Port B bit 2 = LED DS2
Parallel Port B bit 3 = LED DS3
Once you compile and run CONTROLLED.C, the following display will appear in the
Dynamic C STDIO window.
Press “2” or “3” on your keyboard to select LED DS2 or DS3 on the Prototyping
Board. Then follow the prompt in the Dynamic C STDIO window to turn the LED ON
or OFF. A logic low will light up the LED you selected.
FLASHLED1.C—demonstrates the use of assembly language to flash LEDs DS2 and
DS3 on the Prototyping Board at different rates. Once you have compiled and run this
program, LEDs DS2 and DS3 will flash on/off at different rates.
FLASHLED2.C—demonstrates the use of cofunctions and costatements to flash LEDs
DS2 and DS3 on the Prototyping Board at different rates. Once you have compiled and
run this program, LEDs DS2 and DS3 will flash on/off at different rates.
User’s Manual 17
TAMPERDETECTION.C—demonstrates how to detect an attempt to enter the bootstrap
mode. When an attempt is detected, the battery-backed onchip-encryption RAM on the
Rabbit 4000 is erased. This battery-backed onchip-encryption RAM can be useful to
store data such as an AES encryption key from a remote location.
This sample program shows how to load and read the battery-backed onchip-encryption
RAM and how to enable a visual indicator.
Once this sample is compiled and running (you pressed the F9 key while the sample
program is open), remove the programming cable and press the reset button on the
Prototyping Board to reset the module. LEDs DS2 and DS3 will be flashing on and off.
Now press switch S2 to load the battery-backed RAM with the encryption key. The
LEDs are now on continuously. Notice that the LEDs will stay on even when you press
the reset button on the Prototyping Board.
Reconnect the programming cable briefly and unplug it again to simulate an attempt to
access the onchip-encryption RAM. The LEDs will be flashing because the battery-
backed onchip-encryption RAM has been erased. Notice that the LEDs will continue
flashing even when you press the reset button on the Prototyping Board.
You may press switch S2 again and repeat the last steps to watch the LEDs.
TOGGLESWITCH.C—demonstrates the use of costatements to detect switch presses
using the press-and-release method of debouncing. LEDs DS2 and DS3 on the Proto-
typing Board are turned on and off when you press switches S2 and S3. S2 and S3 are
controlled by PB4 and PB5 respectively.
Once you have loaded and executed these five programs and have an understanding of
how Dynamic C and the RCM4200 modules interact, you can move on and try the other
sample programs, or begin building your own.
18 RabbitCore RCM4200
3.2.1 Use of Serial Flash
The following sample programs can be found in the SAMPLES\RCM4200\Serial_Flash
folder.
SERIAL_FLASHLOG.C—This program runs a simple Web server and stores a log of
hits on the home page of the serial flash “server.” This log can be viewed and cleared
from a browser at http://10.10.6.100/. You will likely have to first “configure” your net-
work interface card for a “10Base-T Half-Duplex,” “100Base-T Half-Duplex,” or an
“Auto-Negotiation” connection on the “Advanced” tab, which is accessed from the
control panel (Start > Settings > Control Panel) by choosing Network
Connections.
SFLASH_INSPECT.C—This program is a handy utility for inspecting the contents of a
serial flash chip. When the sample program starts running, it attempts to initialize a
serial flash chip on Serial Port C. Once a serial flash chip is found, the user can perform
five different commands to print out the contents of a specified page, set all bytes on
the specified page to a single random value, clear (set to zero) all the bytes in a speci-
fied page, set all bytes on the specified page to a given value, or save user-specified text
to a selected page.
The program will switch between generating parity or not on Serial Port C. Serial Port D will always be checking parity, so parity errors 1an should occur during every other sequence. To set up the Prototyping Board, you will need to tie TxC and RXD together on R8232 header at J4 using one of the jumpers supplied in the Development Ki shown in the diagram. The Dynamic C STDIO window will display the error sequence. 0 SERDMA . CiThis program demonstrates using DMA to transfer data from a circ buffer to the serial port and vice versa. The Dynamic C STDIO window is used to clear the buffer. Before you compile and run the sample program, you will need to connect the RS-232 header at J4 to your PC as shown in the diagram using the serial to DB9 cable supplied in the Development Kit. Once you have compiled and run the sample program, start Tera Term or another terminal emulation program to connect to the selected PC serial port at a baud rate of 115,200 bps. You can observe the output in the Dynamic C STDIO window as you type in Tera Term, and you can also use the Dynamic C STDIO window to clear the buffer. DOC: 6&5 The Tera Term utility can be downloaded from hp.vector.co.jp/authors/VA0024l6/teraterm.html. User's Manual
Users Manual 19
3.2.2 Serial Communication
The following sample programs are found in the SAMPLES\RCM4200\SERIAL folder.
FLOWCONTROL.C—This program demonstrates how to configure Serial Port D for
CTS/RTS flow control with serial data coming from Serial Port C (TxC) at 115,200 bps.
The serial data received are displayed in the STDIO window.
To set up the Prototyping Board, you will need to tie TxD and RxD
together on the RS-232 header at J4, and you will also tie TxC and
RxC together using the jumpers supplied in the Development Kit as
shown in the diagram.
A repeating triangular pattern should print out in the STDIO window.
The program will periodically switch flow control on or off to demonstrate the effect of
flow control.
If you have two Prototyping Boards with modules, run this sample program on the
sending board, then disconnect the programming cable and reset the sending board so
that the module is operating in the Run mode. Connect TxC, TxD, and GND on the
sending board to RxC, RxD, and GND on the other board, then, with the programming
cable attached to the other module, run the sample program.
PARITY.C—This program demonstrates the use of parity modes by
repeatedly sending byte values 0–127 from Serial Port C to Serial Port D.
The program will switch between generating parity or not on Serial
Port C. Serial Port D will always be checking parity, so parity errors
should occur during every other sequence.
To set up the Prototyping Board, you will need to tie TxC and RxD together on the
RS-232 header at J4 using one of the jumpers supplied in the Development Kit as
shown in the diagram.
The Dynamic C STDIO window will display the error sequence.
SERDMA.CThis program demonstrates using DMA to transfer data from a circular
buffer to the serial port and vice versa. The Dynamic C STDIO window is used to view or
clear the buffer.
Before you compile and run the sample program, you
will need to connect the RS-232 header at J4 to your PC
as shown in the diagram using the serial to DB9 cable
supplied in the Development Kit.
Once you have compiled and run the sample program,
start Tera Term or another terminal emulation program
to connect to the selected PC serial port at a baud rate of
115,200 bps. You can observe the output in the Dynamic C
STDIO window as you type in Tera Term, and you can
also use the Dynamic C STDIO window to clear the
buffer.
The Tera Term utility can be downloaded from
hp.vector.co.jp/authors/VA002416/teraterm.html.
J4
RxC TxC
GND
TxD RxD
J4
RxC
RxD GND
TxD
TxC
J4
RxC
TxC
GND
TxD
RxD
Colored
edge
received by RXD. The received characters are converted to upper case and are sent out on TXD, are received on RXC, and are displayed in the Dynamic C STDIO window. To set up the Prototyping Board, you will need to tie TxD and RXC together o RS232 header at J4, and you will also tie RXD and TxC together using theju supplied in the Development Kit as shown in the diagram. 0 SIMPLESWIRE . CiThis program demonstrates Siwire RS232 serial commun with flow control on Serial Port D and data flow on Serial Port C. To set up the Prototyping Board, you will need to tie TxD and RXD together on the RS232 header at J4, and you will also tie TxC and RxC together using the jumpers supplied in the Development Kit as shown in the diagram. Once you have compiled and run this program, you can test flow con, trol by disconnecting the TxD jumper from RXD while the program is running ters will no longer appear in the STDIO window, and will display again once T connected back to RXD. If you have two Prototyping Boards with modules, nin this sample program o sending board, then disconnect the programming cable and reset the sending b that the module is operating in the Run mode. Connect TxC, TXD, and GND 0 sending board to RXC, RXD, and GND on the other board, then, with the prog cable attached to the other module, run the sample program. Once you have c and run this program, you can test flow control by disconnecting TxD from R before while the program is running. Since the J4 header locations on the two Pro Boards are connected with wires, there are no slipion jumpers at J4 on either Pro Board. 0 SWITCHCHAR. CiThis program demonstrates transmitting and then receiving ASCII string on Serial Ports C and D. It also displays the serial data received f ports in the STDIO window. To set up the Prototyping Board, you will need to tie TxD and RXC together on the RS232 header at J4, and you will also tie RXD and TxC together using the jumpers supplied in the Development Kit as shown in the diagram. Once you have compiled and run this program, press and release switches S2 and S3 on the Prototyping Board. The data sent between the seria will be displayed in the STDIO window. 20 RabbilCore
20 RabbitCore RCM4200
SIMPLE3WIRE.C—This program demonstrates basic RS-232 serial
communication. Lower case characters are sent on TxC, and are
received by RxD. The received characters are converted to upper case
and are sent out on TxD, are received on RxC, and are displayed in the
Dynamic C STDIO window.
To set up the Prototyping Board, you will need to tie TxD and RxC together on the
RS-232 header at J4, and you will also tie RxD and TxC together using the jumpers
supplied in the Development Kit as shown in the diagram.
SIMPLE5WIRE.C—This program demonstrates 5-wire RS-232 serial communication
with flow control on Serial Port D and data flow on Serial Port C.
To set up the Prototyping Board, you will need to tie TxD and RxD
together on the RS-232 header at J4, and you will also tie TxC and
RxC together using the jumpers supplied in the Development Kit as
shown in the diagram.
Once you have compiled and run this program, you can test flow con-
trol by disconnecting the TxD jumper from RxD while the program is running. Charac-
ters will no longer appear in the STDIO window, and will display again once TxD is
connected back to RxD.
If you have two Prototyping Boards with modules, run this sample program on the
sending board, then disconnect the programming cable and reset the sending board so
that the module is operating in the Run mode. Connect TxC, TxD, and GND on the
sending board to RxC, RxD, and GND on the other board, then, with the programming
cable attached to the other module, run the sample program. Once you have compiled
and run this program, you can test flow control by disconnecting TxD from RxD as
before while the program is running. Since the J4 header locations on the two Prototyping
Boards are connected with wires, there are no slip-on jumpers at J4 on either Prototyping
Board.
SWITCHCHAR.CThis program demonstrates transmitting and then receiving an
ASCII string on Serial Ports C and D. It also displays the serial data received from both
ports in the STDIO window.
To set up the Prototyping Board, you will need to tie TxD and RxC
together on the RS-232 header at J4, and you will also tie RxD and
TxC together using the jumpers supplied in the Development Kit as
shown in the diagram.
Once you have compiled and run this program, press and release
switches S2 and S3 on the Prototyping Board. The data sent between the serial ports
will be displayed in the STDIO window.
J4
RxC TxC
GND
TxD RxD
J4
RxC TxC
GND
TxD RxD
J4
RxC TxC
GND
TxD RxD
22: 22;!‘1 5.3 gether with a soldered have soldered in the ccessory parts in the e you have compiled and run this program, press and rototyping Board. The data echoed between the se lo window.
User’s Manual 21
IOCONFIG_SWITCHECHO.C—This program demonstrates how to set up Serial Port E,
which then transmits and then receives an ASCII string when switch S2 is pressed. The
echoed serial data are displayed in the Dynamic C STDIO window.
Note that the I/O lines that carry the Serial Port E signals are not the Rabbit 4000
defaults. The Serial Port E I/O lines are configured by calling the library function
serEconfig() that was generated by the Rabbit 4000 IOCONFIG.EXE utility pro-
gram. Serial Port E is configured to use Parallel Port E bits PD6 and PD7. These signals
are available on the Prototyping Board's Module Extension Header (header J2).
Serial Port D is left in its default configuration, using Parallel Port C bits PC0 and PC1.
These signals are available on the Prototyping Board's RS-232 connector (header J4).
Serial Port D transmits and then receives an ASCII string when switch S3 is pressed.
Also note that there is one library generated by IOCONFIG.EXE in the Dynamic C
SAMPLES\RCM4200\SERIAL folder for the 29 MHz RCM4210.
To set up the Prototyping Board, you will need to tie TxD
and RxD together on the RS-232 header at J4 using the
jumpers supplied in the Development Kit; you will also
tie TxE (PD6) and RxE (PD7) together with a soldered
wire or with a wire jumper if you have soldered in the
IDC header supplied with the accessory parts in the
Development Kit.
Once you have compiled and run this program, press and
release switches S2 or S3 on the Prototyping Board. The data echoed between the serial
ports will be displayed in the STDIO window.
J4
TxC
GND
RxD
TxD RxC
J2
+3.3 V
/RST_OUT
PE5
PE7
PD1/LN1
PD3/LN3
PD5/LN5
PD7/LN7
VREF
GND
/IORD
PE6
PD0/LN0
PD2/LN2
PD4/LN4
PD6/LN6
CVT
AGND
22 RabbitCore RCM4200
3.2.3 A/D Converter Inputs (RCM4200 only)
The following sample programs are found in the SAMPLES\RCM4200\ADC folder.
AD_CAL_ALL.C—Demonstrates how to recalibrate all the single-ended analog input
channels with one gain using two known voltages to generate the calibration constants for
each channel. The constants will be written into the user block data area.
Connect a positive voltage from 0–20 V DC (for example, the power supply positive out-
put) to analog input channels LN0IN–LN6IN on the Prototyping Board, and connect the
ground to GND. Use a voltmeter to measure the voltage, and follow the instructions in the
Dynamic C STDIO window once you compile and run this sample program. Remember
that analog input LN7 on the Prototyping Board is used with the thermistor and is not be
used with this sample program.
NOTE: The above sample program will overwrite the existing calibration constants.
AD_CAL_CHAN.C—Demonstrates how to recalibrate one single-ended analog input
channel with one gain using two known voltages to generate the calibration constants for
that channel. The constants will be rewritten into the user block data area.
Connect a positive voltage from 0–20 V DC (for example, the power supply positive out-
put) to an analog input channel on the Prototyping Board, and connect the ground to GND.
Use a voltmeter to measure the voltage, and follow the instructions in the Dynamic C STDIO
window once you compile and run this sample program. Remember that analog input LN7
on the Prototyping Board is used with the thermistor and is not be used with this sample
program.
NOTE: The above sample program will overwrite the existing calibration constants for
the selected channel.
AD_RDVOLT_ALL.C—Demonstrates how to read all single-ended A/D input channels
using previously defined calibration constants. The constants used to compute equivalent
voltages are read from the user block data area, so the sample program cannot be run using
the “Code and BIOS in RAM” compiler option.
Compile and run this sample program once you have connected a positive voltage from 0–
20 V DC (for example, the power supply positive output) to analog input channels LN0IN–
LN6IN on the Prototyping Board, and ground to GND. Follow the prompts in the Dynamic C
STDIO window. Raw data and the computed equivalent voltages will be displayed.
Remember that analog input LN7 on the Prototyping Board is used with the thermistor and
is not be used with this sample program.
AD_SAMPLE.C—Demonstrates how to how to use a low level driver on single-ended
inputs. The program will continuously display the voltage (averaged over 10 samples) that
is present on an A/D converter channel (except LN7). The constants used to compute
equivalent voltages are read from the user block data area, so the sample program cannot be
run using the “Code and BIOS in RAM” compiler option.
Compile and run this sample program once you have connected a positive voltage from 0–
20 V DC to an analog input (except LN7) on the Prototyping Board, and ground to GND.
Follow the prompts in the Dynamic C STDIO window. Raw data and the computed equiv-
alent voltages will be displayed. If you attach a voltmeter between the analog input and
ground, you will be able to observe that the voltage in the Dynamic C STDIO window
tracks the voltage applied to the analog input as you vary it.
0 THERMISTOR . CiDemonstrates how to use analog input LN7 to calculate te for display to the Dynamic C STDIO window. This sample program assume thermistor is the one included in the Development Kit whose values for beta resistance, and resistance at standard temperature are given in the part speei Install the thermistor at location JP25 on the Prototyping Board before runn sample program. Observe the temperature changes shown in the Dynamic C window as you apply heat or cold air to the thermistor. 3.2.3.1 Downloading and Uploading Calibration Constants The Tera Term utility called for in these sample programs can be downloaded f hp.vector.co.jp/authors/VA002416/teraterm.html. These sample programs must be compiled to flash memory. To do so, select Op Project Options in Dynamic C, then select the “Compiler" tab, and select “Co BIOS in Flash" for the BIOS Memory Selling. Before you compile and run these sample programs, you will also need to connect the R5232 header at J4 to your PC as shown in the diagram using the serial to DB9 cable supplied in the Development Kit. 0 DNLOADCALIE . CiDemonstrates how to retrieve analog calibration data to rewrite it back to the user block using a terminal emulation utility such as Tera Term. Start Tera Term or another terminal emulation program on your PC, and configure the serial parameters as follows. Colored edge “ill 0 Enable Local Echo option 0 Baud rate 19,200 bps, 8 bits, no parity, 1 stop bit 0 Feed options — Receive = CR, Transmit = CR + LF Now compile and run this sample program. Verify that the message “Waiting, Plea Send Data file" message is being display in the Tera Term display window before proceeding. Within Tera Term, select File-->Send File-->Path and filename, then select the OPEN option within the dialog box. Once the data file has been downloaded, Tera Term will indicate whether the calibration data were written successfully. 0 UPLOADCALIE . CiDemonstrates how to read the analog calibration constants fro the user block using a terminal emulation utility such as Tera Term. Start Tera Term or another terminal emulation program on your PC, and configure serial parameters as follows. User's Manual
Users Manual 23
THERMISTOR.CDemonstrates how to use analog input LN7 to calculate temperature
for display to the Dynamic C STDIO window. This sample program assumes that the
thermistor is the one included in the Development Kit whose values for beta, series
resistance, and resistance at standard temperature are given in the part specification.
Install the thermistor at location JP25 on the Prototyping Board before running this
sample program. Observe the temperature changes shown in the Dynamic C STDIO
window as you apply heat or cold air to the thermistor.
3.2.3.1 Downloading and Uploading Calibration Constants
The Tera Term utility called for in these sample programs can be downloaded from
hp.vector.co.jp/authors/VA002416/teraterm.html.
These sample programs must be compiled to flash memory. To do so, select Options >
Project Options in Dynamic C, then select the “Compiler” tab, and select “Code and
BIOS in Flash” for the BIOS Memory Setting.
Before you compile and run these sample programs, you
will also need to connect the RS-232 header at J4 to your
PC as shown in the diagram using the serial to DB9 cable
supplied in the Development Kit.
DNLOADCALIB.C—Demonstrates how to retrieve
analog calibration data to rewrite it back to the user
block using a terminal emulation utility such as Tera
Term.
Start Tera Term or another terminal emulation program
on your PC, and configure the serial parameters as
follows.
Now compile and run this sample program. Verify that the message “Waiting, Please
Send Data file” message is being display in the Tera Term display window before
proceeding.
Within Tera Term, select File-->Send File-->Path and filename, then select the
OPEN option within the dialog box. Once the data file has been downloaded, Tera
Term will indicate whether the calibration data were written successfully.
UPLOADCALIB.C—Demonstrates how to read the analog calibration constants from
the user block using a terminal emulation utility such as Tera Term.
Start Tera Term or another terminal emulation program on your PC, and configure the
serial parameters as follows.
Baud rate 19,200 bps, 8 bits, no parity, 1 stop bit
Enable Local Echo option
Feed options — Receive = CR, Transmit = CR + LF
J4
RxC
TxC
GND
TxD
RxD
Colored
edge
24 RabbitCore RCM4200
Follow the remaining steps carefully in Tera Term to avoid overwriting previously
saved calibration data when using same the file name.
Tera Term is now ready to log all data received on the serial port to the file you specified.
You are now ready to compile and run this sample program. A message will be displayed
in the Tera Term display window once the sample program is running.
Enter the serial number you assigned to your RabbitCore module in the Tera Term
display window, then press the ENTER key. The Tera Term display window will now
display the calibration data.
Now select CLOSE from within the Tera Term LOG window, which will likely be a
separate pop-up window minimized at the bottom of your PC screen. This finishes the
logging and closes the file.
Open your data file and verify that the calibration data have been written properly. A
sample is shown below.
Baud rate 19,200 bps, 8 bits, no parity, 1 stop bit
Enable Local Echo option
Feed options — Receive = CR, Transmit = CR + LF
Enable the File APPEND option at the bottom of the dialog box
Select the OPEN option at the right-hand side of the dialog box
Serial port transmission
========================
Uploading calibration table . . .
Enter the serial number of your controller = 9MN234
SN9MN234
ADSE
0
float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,
float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,
1
float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,
float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,
|
|
ADDF
0
float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,
float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,
2
float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,
float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,float_gain,float_offset,
|
|
ADMA
3
float_gain,float_offset,
4
float_gain,float_offset,
|
|
END
User’s Manual 25
3.2.4 Real-Time Clock
If you plan to use the real-time clock functionality in your application, you will need to set
the real-time clock. Set the real-time clock using the SETRTCKB.C sample program from
the Dynamic C SAMPLES\RTCLOCK folder, using the onscreen prompts. The
RTC_TEST.C sample program in the Dynamic C SAMPLES\RTCLOCK folder provides
additional examples of how to read and set the real-time clock.
26 RabbitCore RCM4200
CMOS-Ievel signals AID
User’s Manual 27
4. HARDWARE REFERENCE
Chapter 4 describes the hardware components and principal hardware
subsystems of the RCM4200. Appendix A, “RCM4200 Specifica-
tions,” provides complete physical and electrical specifications.
Figure 5 shows the Rabbit-based subsystems designed into the RCM4200.
Figure 5. RCM4200 Subsystems
32 kHz
osc
RabbitCore Module
RABBIT ®
4000
CMOS-level signals
RS-232, RS-485
serial communication
drivers on motherboard
Customer-specific
applications
Level
converter
Ethernet
A/D Converter
SRAM
Serial
Flash
Program
Flash
Fast
SRAM
58.98 MHz
osc
nunnunnu flflflflflflflflflflflflflfl flflflflflfl nunnnn
28 RabbitCore RCM4200
4.1 RCM4200 Digital Inputs and Outputs
Figure 6 shows the RCM4200 pinouts for header J2.
Figure 6. RCM4200 Pinout
Headers J2 is a standard 2 × 25 IDC header with a nominal 1.27 mm pitch.
Note: These pinouts are as seen on
the Bottom Side of the module.
+3.3 V_IN
/RESET_OUT
/IOWR
VBAT_EXT
PA1
PA3
PA5
PA7
PB1_SCLKA
PB3
PB5
PB7
PC1
PC3_RxC
PC5_RxB
PC7_RxA
PE1
PE3
PE5/SMODE0
PE7/STATUS
PD1/LN1
PD3/LN3
PD5/LN5
PD7/LN7
VREF
GND
/IORD
/RESET_IN
PA0
PA2
PA4
PA6
PB0_SCLKB
PB2
PB4
PB6
PC0
PC2_TxC
PC4_TxB
PC6_TxA
PE0
PE2_ENET_EN
PE4
PE6/SMODE1
PD0/LN0
PD2/LN2
PD4/LN4
PD6/LN6
CONVERT
GND
J2
n.c. = not connected
I T?- It
User’s Manual 29
Figure 7 shows the use of the Rabbit 4000 microprocessor ports in the RCM4200 modules.
Figure 7. Use of Rabbit 4000 Ports
The ports on the Rabbit 4000 microprocessor used in the RCM4200 are configurable, and
so the factory defaults can be reconfigured. Table 2 lists the Rabbit 4000 factory defaults
and the alternate configurations.
R
ABBIT®
4000
Port A Port B Port D
(RCM4210 only)
Port E
PA0PA7 PB2PB7
PE0PE7
PD0PD7
Watchdog
11 Timers
Clock Doubler
Slave Port
Real-Time Clock
RAM
Backup Battery
Support
Flash
Misc. I/O
PC4
PC5
Port C
(Serial Ports C & D)
Programming
Port
(Serial Port A)
A/D Converter
(Serial Port B)
PB1, PC6, STATUS
PC0, PC2
PC1, PC3
Serial Ports E & F
(RCM4210 only)
/RESET_OUT
/IORD
/IOWR
/RES_IN
PC7, /RES,
SMODE0, SMODE1
30 RabbitCore RCM4200
Table 2. RCM4200 Pinout Configurations
Pin Pin Name Default Use Alternate Use Notes
1 +3.3 V_IN
2GND
3 /RES_OUT Reset output Reset input Reset output from Reset
Generator or external reset
input
4 /IORD Output External I/O read strobe
5 /IOWR Output External I/O write strobe
6 /RESET_IN Input Input to Reset Generator
7 VBAT_EXT Battery input
8–15 PA[0:7] Input/Output
Slave port data bus
(SD0–SD7)
External I/O data bus
(ID0–ID7)
16 PB0 Input/Output SCLKB
External I/O Address IA6
SCLKB (used by RCM4200
A/D converter — see
Section 4.2.1)
17 PB1 Input/Output SCLKA
External I/O Address IA7 Programming port CLKA
18 PB2 Input/Output /SWR
External I/O Address IA0
19 PB3 Input/Output /SRD
External I/O Address IA1
20 PB4 Input/Output SA0
External I/O Address IA2
21 PB5 Input/Output SA1
External I/O Address IA3
22 PB6 Input/Output /SCS
External I/O Address IA4
23 PB7 Input/Output /SLAVATN
External I/O Address IA5
User’s Manual 31
24 PC0 Input/Output
TXD
I/O Strobe I0
Timer C0
TCLKF
Serial Port D
25 PC1 Input/Output
RXD/TXD
I/O Strobe I1
Timer C1
RCLKF
Input Capture
26 PC2 Input/Output
TXC/TXF
I/O Strobe I2
Timer C2
Serial Port C (shared by
serial flash)
27 PC3 Input/Output
RXC/TXC/RXF
I/O Strobe I3
Timer C3
SCLKD
Input Capture
28 PC4 Input/Output
TXB
I/O Strobe I4
PWM0
TCLKE Serial Port B (shared by
RCM4200 A/D converter)
29 PC5 Input/Output
RXB/TXB
I/O Strobe I5
PWM1
RCLKE
Input Capture
30 PC6 Input/Output
TXA/TXE
I/O Strobe I6
PWM2
Programming port
31 PC7 Input/Output
RXA/TXA/RXE
I/O Strobe I7
PWM3
SCLKC
Input Capture
32 PE0 Input/Output
I/O Strobe I0
A20
Timer C0
TCLKF
INT0
QRD1B
Table 2. RCM4200 Pinout Configurations (continued)
Pin Pin Name Default Use Alternate Use Notes
32 RabbitCore RCM4200
33 PE1 Input/Output
I/O Strobe I1
A21
Timer C1
RXD/RCLKF
INT1
QRD1A
Input Capture
34 PE2 Input/Output
I/O Strobe I2
A22
Timer C2
TXF
DREQ0
QRD2B
Ethernet enable
35 PE3 Input/Output
I/O Strobe I3
A23
Timer C3
RXC/RXF/SCLKD
DREQ1
QRD2A
Input Capture
36 PE4 Input/Output
I/O Strobe I4
/A0
INT0
PWM0
TCLKE
37 PE5/SMODE0 Input/Output
I/O Strobe I5
INT1
PWM1
RXB/RCLKE
Input Capture
PE5 is the default
configuration
38 PE6/SMODE1 Input/Output
I/O Strobe I6
PWM2
TXE
DREQ0
PE6 is the default
configuration
39 PE7/STATUS Input/Output
I/O Strobe I7
PWM3
RXA/RXE/SCLKC
DREQ1
Input Capture
PE7 (SCLKC) is the
default configuration
Table 2. RCM4200 Pinout Configurations (continued)
Pin Pin Name Default Use Alternate Use Notes
User’s Manual 33
40–47 LN[0:7] Analog Input A/D converter
(RCM4200 only)
40 PD0 Input/Output
I/O Strobe I0
Timer C0
D8
INT0
SCLKD/TCLKF
QRD1B
RCM4210 only
41 PD1 Input/Output
IA6
I/O Strobe I1
Timer C1
D9
INT1
RXD/RCLKF
QRD1A
Input Capture
42 PD2 Input/Output
I/O Strobe I2
Timer C2
D10
DREQ0
TXF/SCLKC
QRD2B
SCLKC (see Section 4.2.1)
43 PD3 Input/Output
IA7
I/O Strobe I3
Timer C3
D11
DREQ1
RXC/RXF
QRD2A
Input Capture
RCM4210 only
44 PD4 Input/Output
I/O Strobe I4
D12
PWM0
TXB/TCLKE
45 PD5 Input/Output
IA6
I/O Strobe I5
D13
PWM1
RXB/RCLKE
Input Capture
Table 2. RCM4200 Pinout Configurations (continued)
Pin Pin Name Default Use Alternate Use Notes
34 RabbitCore RCM4200
4.1.1 Memory I/O Interface
The Rabbit 4000 address lines (A0–A19) and all the data lines (D0–D7) are routed inter-
nally to the onboard flash memory and SRAM chips. I/0 write (/IOWR) and I/0 read
(/IORD) are available for interfacing to external devices, and are also used by the
RCM4200.
Parallel Port A can also be used as an external I/O data bus to isolate external I/O from the
main data bus. Parallel Port B pins PB2–PB7 can also be used as an auxiliary address bus.
When using the auxiliary I/O bus for any reason, you must add the following line at the
beginning of your program.
#define PORTA_AUX_IO // required to enable auxiliary I/O bus
Selected pins on Parallel Ports D and E as specified in Table 2 may be used for input
capture, quadrature decoder, DMA, and pulse-width modulator purposes.
4.1.2 Other Inputs and Outputs
The PE5–PE7 pins can be brought out to header J2 instead of the STATUS and the two
SMODE pins, SMODE0 and SMODE1, as explained in Appendix A.6.
/RESET_IN is normally associated with the programming port, but may be used as an
external input to reset the Rabbit 4000 microprocessor and the RCM4200 memory.
/RESET_OUT is an output from the reset circuitry that can be used to reset other
peripheral devices.
46 PD6 Input/Output
I/O Strobe I6
D14
PWM2
TXA/TXE
Serial Port E
(RCM4210 only)
47 PD7 Input/Output
IA7
I/O Strobe I7
D15
PWM3
RXA/RXE
Input Capture
48 CONVERT Digital Input A/D converter
(RCM4200 only)
49 VREF Analog reference
voltage
1.15 V/2.048 V/2.500 V
on-chip ref. voltage
(RCM4200 only)
50 GND Ground Analog ground
Table 2. RCM4200 Pinout Configurations (continued)
Pin Pin Name Default Use Alternate Use Notes
User’s Manual 35
4.2 Serial Communication
The RCM4200 module does not have any serial driver or receiver chips directly on the
board. However, a serial interface may be incorporated on the board the RCM4200 is
mounted on. For example, the Prototyping Board has an RS-232 transceiver chip.
4.2.1 Serial Ports
There are five serial ports designated as Serial Ports A, B, C, D, and E. All five serial ports
can operate in an asynchronous mode up to the baud rate of the system clock divided by 8.
An asynchronous port can handle 7 or 8 data bits. A 9th bit address scheme, where an
additional bit is sent to mark the first byte of a message, is also supported.
Serial Port A is normally used as a programming port, but may be used either as an asyn-
chronous or as a clocked serial port once application development has been completed and
the RCM4200 is operating in the Run Mode.
Serial Port B is shared by the RCM4200 module’s A/D converter, and is set up as a
clocked serial port. Since this serial port is set up for synchronous serial communication
on the RCM4200 model, you will lose the A/D converters functionality if you try to use
the serial port in the asynchronous mode. Serial Port B is available without any restrictions
on the RCM4210.
Serial Port C is shared with the serial flash, and is set up as a clocked serial port. PE7 is set
up to provide the SCLKC output to the serial flash, but PD2 also provides the SCLKC
ouput automatically when Serial Port C is used as a clocked serial port. Since this serial
port is available for synchronous serial communication on either RCM4200 model, you
will lose the serial flash’s functionality if you try to use the serial port in the asynchronous
mode.
NOTE: Since Serial Port C is shared with the serial flash, exercise care if you attempt to
use Serial Port C for other serial communication. Your application will have to manage
the sharing negotiations to avoid conflicts when reading or writing to the serial flash.
Serial Port D may also be used as a clocked serial port. Note that PD0 provides the
SCLKD ouput automatically when Serial Port D is set up as a clocked serial port.
Serial Port E, which is available only on the RCM4210, can also be configured as an
SDLC/HDLC serial port. The IrDA protocol is also supported in SDLC format by Serial
Port E. Serial Port E must be configured before it can be used. The sample program
IOCONFIG_SWITCHECHO.C in the Dynamic C SAMPLES\RCM4200\SERIAL folder
shows how to configure Serial Port E.
36 RabbitCore RCM4200
Table 3 summarizes the possible parallel port pins for the serial ports and their clocks.
4.2.1.1 Using the Serial Ports
The receive lines on the RCM4200 serial ports do not have pull-up resistors. If you are
using the serial ports without a receiver chip (for example, for RS-422, RS-232, or RS-485
serial communication), the absence of a pull-up resistor on the receive line will likely lead
to line breaks being generated since line breaks are normally generated whenever the
receive line is pulled low. If you are operating a serial port asynchronously, you can inhibit
character assembly during breaks by setting bit 1 in the corresponding Serial Port
Extended Register to 1. Should you need line breaks, you will have to either add a pull-up
resistor on your motherboard or use a receiver that incorporates the circuits to have the
output default to the nonbreak levels.
The Dynamic C RS232.LIB library requires you to define the macro RS232_
NOCHARASSYINBRK to inhibit break-character assembly for all the serial ports.
#define RS232_NOCHARASSYINBRK
This macro is already defined so that it is the default behavior for the sample programs in
the Dynamic C SAMPLES\RCM4200\SERIAL folder.
Table 3. Rabbit 4000 Serial Port and Clock Pins
Serial Port A
(program-
ming port)
TXA PC6, PC7, PD6
Serial Port D
TXD PC0, PC1
RXA PC7, PD7, PE7 RXD PC1, PD1, PE1
SCLKA PB1 SCLKD PD0, PE0, PE3, PC3
Serial Port B
(used by A/D
converter on
RCM4200)
TXB PC4, PC5, PD4
Serial Port E
(RCM4210
only)
TXE PD6, PC6, PE6
RXB PC5, PD5, PE5 RXE PD7, PC7, PE7
SCLKB PB0 RCLKE PD5, PC5, PE5
Serial Port C
(shared by
serial flash)
TXC PC2, PC3 TCLKE PD4, PC4, PE4
RXC PC3, PD3, PE3 RCLKE must be selected to be on the same parallel
port as TXE.
SCLKC PD2, PE2, PE7, PC7
f fl+m
User’s Manual 37
4.2.2 Ethernet Port
Figure 8 shows the pinout for the RJ-45 Ethernet port (J3). Note that some Ethernet con-
nectors are numbered in reverse to the order used here.
Figure 8. RJ-45 Ethernet Port Pinout
Three LEDs are placed next to the RJ-45 Ethernet jack, one to indicate Ethernet link/activity
(LINK/ACT), one to indicate when the RCM4200 is connected to a functioning 100Base-T
network (SPEED), and one (FDX/COL) to indicate that the current connection is in full-
duplex mode (steady on) or that a half-duplex connection is experiencing collisions
(blinks).
The RJ-45 connector is shielded to minimize EMI effects to/from the Ethernet signals.
ETHERNET
RJ-45 Plug
1. E_Tx+
2. E_Tx
3. E_Rx+
6. E_Rx
18
RJ-45 Jack
38 RabbitCore RCM4200
4.2.3 Programming Port
The RCM4200 is programmed via the 10-pin header labeled J1. The programming port
uses the Rabbit 4000s Serial Port A for communication. Dynamic C uses the programming
port to download and debug programs.
Serial Port A is also used for the following operations.
Cold-boot the Rabbit 4000 on the RCM4200 after a reset.
Fast copy designated portions of flash memory from one Rabbit-based board (the
master) to another (the slave) using the Rabbit Cloning Board.
Alternate Uses of the Programming Port
All three Serial Port A signals are available as
a synchronous serial port
an asynchronous serial port, with the clock line usable as a general CMOS I/O pin
The programming port may also be used as a serial port via the DIAG connector on the
programming cable.
In addition to Serial Port A, the Rabbit 4000 startup-mode (SMODE0, SMODE1),
STATUS, and reset pins are available on the programming port.
The two startup-mode pins determine what happens after a reset—the Rabbit 4000 is
either cold-booted or the program begins executing at address 0x0000.
The status pin is used by Dynamic C to determine whether a Rabbit microprocessor is
present. The status output has three different programmable functions:
1. It can be driven low on the first op code fetch cycle.
2. It can be driven low during an interrupt acknowledge cycle.
3. It can also serve as a general-purpose output once a program has been downloaded and
is running.
The reset pin is an external input that is used to reset the Rabbit 4000.
Refer to the Rabbit 4000 Microprocessor User’s Manual for more information.
. wwmwmmmmmmmmmmmwmww oooooooooooooooooooooo __:,_ k ooooooooooooooooooooooo o 31-pin power connector 9. Switching Between Program Mode and Run M Figure User's Manual
Users Manual 39
4.3 Programming Cable
The programming cable is used to connect the programming port of the RCM4200 to a PC
serial COM port. The programming cable converts the RS-232 voltage levels used by the
PC serial port to the CMOS voltage levels used by the Rabbit 4000.
When the
PROG connector on the programming cable is connected to the programming
port on the RCM4200, programs can be downloaded and debugged over the serial interface.
The DIAG connector of the programming cable may be used on header J1 of the RCM4200
with the RCM4200 operating in the Run Mode. This allows the programming port to be
used as a regular serial port.
4.3.1 Changing Between Program Mode and Run Mode
The RCM4200 is automatically in Program Mode when the PROG connector on the pro-
gramming cable is attached, and is automatically in Run Mode when no programming
cable is attached. When the Rabbit 4000 is reset, the operating mode is determined by the
status of the SMODE pins. When the programming cable’s PROG connector is attached,
the SMODE pins are pulled high, placing the Rabbit 4000 in the Program Mode. When the
programming cable’s PROG connector is not attached, the SMODE pins are pulled low,
causing the Rabbit 4000 to operate in the Run Mode.
Figure 9. Switching Between Program Mode and Run Mode
D1
R1
PWR
DS1
GND
J1
U1
C1
GND
C2
JP1
C3
D2
JP2
C4
+3.3 V
J2
R2
BT1
1
S1
RESET
RXD TXD
TXC RXC
GND
J4
UX29
RX81
RX87
CX41
RX83
RX11
CX39
UX30
UX10
UX12
UX14
UX16
RX79
CX29 CX17
RX67
UX45
RX85
GND
GND
GND
1
R24
R22
R21
R23
CX23 RX77
1
R27
R28
JP25
CX25
RX75
RX73 CX27
DS3
S3S2
DS2
J3
UX49 UX4
UX47
+5 V
GND
+3.3 V
RCM1
U2
/RST_OUT
/IOWR
VBAT
EXT
PA1
PA3
PA5
PA7
PB1
PB3
PB5
PB7
PC1
PC3
PC5
PC7
PE1
PE3
PE5
PE7
PD1
LN1
PD3
LN3
PD5
LN5
PD7
LN7
VREF
GND
/IORD
/RST_IN
PA0
PA2
PA4
PA6
PB0
PB2
PB4
PB6
PC0
PC2
PC4
PC6
PE0
PE2
PE4
PE6
PD0
LN0
PD2
LN2
PD4
LN4
PD6
LN6
CVT
AGND
JP24
JP23
C14
C12
C10
C8
C7
C9
C11
C13
R10
R8
R6
R4
R3
R5
R7
R20
R18
R16
R14
R13
R15
R17
R29
JP11
JP15
JP19
JP21
JP22
JP20
JP17
JP13
R19
R9
RX57
RX55
RX97
RX49
UX33UX31
RX89
UX3
UX37 UX42 UX41
RX63
RX65 RX61
RX59
R26
R25
Q1
C15
C19 C20
U3
C18
C17
JP16
JP6
JP5
JP12
JP4
JP3
JP14
JP8
JP7
JP18
JP9
JP10
C16
L1C6
C5
AGND
CVT
LN6IN
LN4IN
LN2IN
LN0IN
VREF
LN7IN
LN5IN
LN3IN
LN1IN
AGND
AGND
R11 R12
RX47
RX43
C43
L2
3
41
Y3
C82
R5 R2
J1
C76
R3
R51
R31
R20
C81
C58
C67
C88
J3
JP11
JP10
JP12
JP1
JP2
JP9
JP6
JP7
JP3
JP5
JP4
C3
C2
C17
C16
R6
R8
R46
R45
R43
R44
R39
R42
U1
R7
C1
C86
L1
C74
U15
C75
R40
R41
JP14
JP15
JP13
U14
C85
C78
L7
C72
C65
C87
C57 U13
R34
R35
R33
R32
Q3
C77
C5
Y4
R14
R12
U4
C24 JP16R13
DS1
LINK
SPEED
FDX
DS2
DS3
R47
R48
R49
C33
C32
C31
R50
C26
R52 C25
C19
R4 C20 C18
U3
Q1
C7
R36
R29
C8
C9 C10
C6
C11 C12
JP8
C15 R27
R11
R16
Y2
U2
R9
C13
C14
C39
U5
C27
C21 R1 R10
D1
R22
C28
C29
C36
C37
C38
C30
C34
C35
R18
U7
U6
R21
R19
R15
C23
R23
RESET
3-pin
power connector
J1
Colored
edge
PROG
DIAG
Programming
Cable
PROG
J1
RESET RCM4200 when changing mode:
Press RESET button (if using Prototyping Board), OR
Cycle power off/on
after removing or attaching programming cable.
To
PC COM port
or USB port
40 RabbitCore RCM4200
A program “runs” in either mode, but can only be downloaded and debugged when the
RCM4200 is in the Program Mode.
Refer to the Rabbit 4000 Microprocessor Users Manual for more information on the pro-
gramming port.
4.3.2 Standalone Operation of the RCM4200
Once the RCM4200 has been programmed successfully, remove the programming cable
from the programming connector and reset the RCM4200. The RCM4200 may be reset by
cycling, the power off/on or by pressing the RESET button on the Prototyping Board. The
RCM4200 module may now be removed from the Prototyping Board for end-use installa-
tion.
CAUTION: Power to the Prototyping Board or other boards should be disconnected
when removing or installing your RCM4200 module to protect against inadvertent
shorts across the pins or damage to the RCM4200 if the pins are not plugged in cor-
rectly. Do not reapply power until you have verified that the RCM4200 module is
plugged in correctly.
H ‘W—H—d
User’s Manual 41
4.4 A/D Converter (RCM4200 only)
The RCM4200 has an onboard ADS7870 A/D converter whose scaling and filtering are
done via the motherboard on which the RCM4200 module is mounted. The A/D converter
multiplexes converted signals from eight single-ended or four differential inputs to Serial
Port B on the Rabbit 4000.
The eight analog input pins, LN0–LN7, each have an input impedance of 6–7 M,
depending on whether they are used as single-ended or differential inputs. The input signal
can range from -2 V to +2 V (differential mode) or from 0 V to +2 V (single-ended mode).
Use a resistor divider such as the one shown in Figure 10 to measure voltages above 2 V
on the analog inputs.
Figure 10. Resistor Divider Network for Analog Inputs
The R1 resistors are typically 20 k to 100 k, with a lower resistance leading to more
accuracy, but at the expense of a higher current draw. The R0 resistors would then be
180 k to 900 k for a 10:1 attenuator. The capacitor filters noise pulses on the A/D
converter input.
The actual voltage range for a signal going to the A/D converter input is also affected by
the 1, 2, 4, 5, 8, 10, 16, and 20 V/V software-programmable gains available on each channel
of the ADS7870 A/D converter. Thus, you must scale the analog signal with an attenuator
circuit and a software-programmable gain so that the actual input presented to the A/D
converter is within the range limits of the ADS7870 A/D converter chip (-2 V to + 2 V or
0 V to + 2 V).
The A/D converter chip can only accept positive voltages. With the R1 resistors connected
to ground, your analog circuit is well-suited to perform positive A/D conversions. When
the R1 resistors are tied to ground for differential measurements, both differential inputs
must be referenced to analog ground, and both inputs must be positive with respect to
analog ground.
R0
LN0
AGND
LN1 ADC
BVREF
R0
CR1
R1
C
ADC
(RCM4200)
1
3
42 RabbitCore RCM4200
If a device such as a battery is
connected across two channels
for a differential measurement,
and it is not referenced to
analog ground, then the current
from the device will flow
through both sets of attenuator
resistors without flowing back
to analog ground as shown in
Figure 11. This will generate a
negative voltage at one of the
inputs, LN1, which will almost
certainly lead to inaccurate A/D
conversions. To make such differential measurements, connect the R1 resistors to the A/D
converters internal reference voltage, which is software-configurable for 1.15 V, 2.048 V,
or 2.5 V. This internal reference voltage is available on pin 49 of header J2 as VREF, and
allows you to convert analog input voltages that are negative with respect to analog ground.
NOTE: The amplifier inside the A/D converters internal voltage reference circuit has a
very limited output-current capability. The internal buffer can source up to 20 mA and
sink only up to 200 µA. Use a separate buffer amplifier if you need to supply any load
current.
The A/D converters CONVERT pin is available on pin 48 of header J2 and can be used as
a hardware means of forcing the A/D converter to start a conversion cycle at a specific time.
The CONVERT signal is an edge-triggered event and has a hold time of two CCLK periods
for debounce.
A conversion is started by an active (rising) edge on the CONVERT pin. The CONVERT
pin must stay low for at least two CCLK periods before going high for at least two CCLK
periods. Figure 12 shows the timing of a conversion start. The double falling arrow on
CCLK indicates the actual start of the conversion cycle.
Figure 12. Timing Diagram for Conversion Start Using CONVERT Pin
Appendix B explains the implementation examples of these features on the Prototyping
Board.
Figure 11. Current Flow from Ungrounded
or Floating Source
R0
R0
2.2 nF
R1
R1
2.2 nF
ADC
AIN0
AIN1
+
I
LN0
LN1
+
-
Device
CCLK
BUSY
CONV
Conversion starts
User’s Manual 43
4.4.1 A/D Converter Power Supply
The analog section is isolated from digital noise generated by other components by way of a
low-pass filter composed of C1, L1, and C86 on the RCM4200 as shown in Figure 13. The
+V analog power supply powers the A/D converter chip.
Figure 13. Analog Supply Circuit
+V
+3.3 V
C1
100 nF
C86
100 nF
L1
44 RabbitCore RCM4200
4.5 Other Hardware
4.5.1 Clock Doubler
The RCM4200 takes advantage of the Rabbit 4000 microprocessors internal clock doubler.
A built-in clock doubler allows half-frequency crystals to be used to reduce radiated
emissions. The 58.98 MHz frequency specified for the RCM4200 model is generated
using a 29.49 MHz crystal.
The clock doubler may be disabled if 58.98 MHz clock speeds are not required. Disabling
the Rabbit 4000 microprocessors internal clock doubler will reduce power consumption
and further reduce radiated emissions. The clock doubler is disabled with a simple config-
uration macro as shown below.
4.5.2 Spectrum Spreader
The Rabbit 4000 features a spectrum spreader, which helps to mitigate EMI problems. The
spectrum spreader is on by default, but it may also be turned off or set to a stronger setting.
The means for doing so is through a simple configuration macro as shown below.
NOTE: Refer to the Rabbit 4000 Microprocessor User’s Manual for more information
on the spectrum-spreading setting and the maximum clock speed.
1. Select the “Defines” tab from the Dynamic C Options > Project Options menu.
2. Add the line CLOCK_DOUBLED=0 to always disable the clock doubler.
The clock doubler is enabled by default, and usually no entry is needed. If you need to
specify that the clock doubler is always enabled, add the line CLOCK_DOUBLED=1 to
always enable the clock doubler.
3. Click OK to save the macro. The clock doubler will now remain off whenever you are
in the project file where you defined the macro.
1. Select the “Defines” tab from the Dynamic C Options > Project Options menu.
2. Normal spreading is the default, and usually no entry is needed. If you need to specify
normal spreading, add the line
ENABLE_SPREADER=1
For strong spreading, add the line
ENABLE_SPREADER=2
To disable the spectrum spreader, add the line
ENABLE_SPREADER=0
NOTE: The strong spectrum-spreading setting is not recommended since it may limit
the maximum clock speed or the maximum baud rate. It is unlikely that the strong set-
ting will be used in a real application.
3. Click OK to save the macro. The spectrum spreader will now remain off whenever you
are in the project file where you defined the macro.
User’s Manual 45
4.6 Memory
4.6.1 SRAM
All RCM4200 modules have 512K of battery-backed data SRAM installed at U10, and the
RCM4200 model has 512K of fast SRAM installed at U12.
4.6.2 Flash EPROM
All RCM4200 modules also have 512K of flash EPROM installed at U11.
NOTE: Rabbit Semiconductor recommends that any customer applications should not be
constrained by the sector size of the flash EPROM since it may be necessary to change
the sector size in the future.
Writing to arbitrary flash memory addresses at run time is discouraged. Instead, define a
“user block” area to store persistent data. The functions writeUserBlock and
readUserBlock are provided for this. Refer to the Rabbit 4000 Microprocessor
Designer’s Handbook for additional information.
4.6.3 Serial Flash
Up to 8 Mbytes of serial flash memory is available to store data and Web pages. Sample
programs in the SAMPLES\RCM4200\Serial_Flash folder illustrate the use of the
serial flash memory.
46 RabbitCore RCM4200
User’s Manual 47
5. SOFTWARE REFERENCE
Dynamic C is an integrated development system for writing
embedded software. It runs on an IBM-compatible PC and is
designed for use with single-board computers and other devices
based on the Rabbit microprocessor. Chapter 5 describes the
libraries and function calls related to the RCM4200.
5.1 More About Dynamic C
Dynamic C has been in use worldwide since 1989. It is specially designed for program-
ming embedded systems, and features quick compile and interactive debugging. A com-
plete reference guide to Dynamic C is contained in the Dynamic C User’s Manual.
You have a choice of doing your software development in the flash memory or in the static
SRAM included on the RCM4200. The flash memory and SRAM options are selected with
the Options > Program Options > Compiler menu.
The advantage of working in RAM is to save wear on the flash memory, which is limited
to about 100,000 write cycles. The disadvantage is that the code and data might not both
fit in RAM.
NOTE: An application can be compiled directly to the battery-backed data SRAM on the
RCM4200 module, but should be run from the fast SRAM after the serial programming
cable is disconnected. Your final code must always be stored in flash memory for
reliable operation. RCM4200 modules have a fast program execution SRAM that is not
battery-backed. Select Code and BIOS in Flash, Run in RAM from the Dynamic C
Options > Project Options > Compiler menu to store the code in flash and copy it to
the fast program execution SRAM at run-time to take advantage of the faster clock
speed. This option optimizes the performance of RCM4200 modules running at
58.98 MHz.
NOTE: Do not depend on the flash memory sector size or type in your program logic.
The RCM4200 and Dynamic C were designed to accommodate flash devices with
various sector sizes in response to the volatility of the flash-memory market.
Developing software with Dynamic C is simple. Users can write, compile, and test C and
assembly code without leaving the Dynamic C development environment. Debugging
occurs while the application runs on the target. Alternatively, users can compile a program
to an image file for later loading. Dynamic C runs on PCs under Windows 95 and later.
Programs can be downloaded at baud rates of up to 460,800 bps after the program compiles.
48 RabbitCore RCM4200
Dynamic C has a number of standard features.
Full-feature source and/or assembly-level debugger, no in-circuit emulator required.
Royalty-free TCP/IP stack with source code and most common protocols.
Hundreds of functions in source-code libraries and sample programs:
XExceptionally fast support for floating-point arithmetic and transcendental functions.
XRS-232 and RS-485 serial communication.
XAnalog and digital I/O drivers.
XI2C, SPI, GPS, file system.
XLCD display and keypad drivers.
Powerful language extensions for cooperative or preemptive multitasking
Loader utility program to load binary images into Rabbit targets in the absence of
Dynamic C.
Provision for customers to create their own source code libraries and augment on-line
help by creating “function description” block comments using a special format for
library functions.
Standard debugging features:
XBreakpoints—Set breakpoints that can disable interrupts.
XSingle-stepping—Step into or over functions at a source or machine code level, µC/OS-II aware.
XCode disassembly—The disassembly window displays addresses, opcodes, mnemonics, and
machine cycle times. Switch between debugging at machine-code level and source-code level by
simply opening or closing the disassembly window.
XWatch expressions—Watch expressions are compiled when defined, so complex expressions
including function calls may be placed into watch expressions. Watch expressions can be updated
with or without stopping program execution.
XRegister window—All processor registers and flags are displayed. The contents of general registers
may be modified in the window by the user.
XStack window—shows the contents of the top of the stack.
XHex memory dump—displays the contents of memory at any address.
XSTDIO window—printf outputs to this window and keyboard input on the host PC can be
detected for debugging purposes. printf output may also be sent to a serial port or file.
User’s Manual 49
5.2 Dynamic C Function Calls
5.2.1 Digital I/O
The RCM4200 was designed to interface with other systems, and so there are no drivers
written specifically for the I/O. The general Dynamic C read and write functions allow
you to customize the parallel I/O to meet your specific needs. For example, use
WrPortI(PEDDR, &PEDDRShadow, 0x00);
to set all the Port E bits as inputs, or use
WrPortI(PEDDR, &PEDDRShadow, 0xFF);
to set all the Port E bits as outputs.
When using the auxiliary I/O bus on the Rabbit 4000 chip, add the line
#define PORTA_AUX_IO // required to enable auxiliary I/O bus
to the beginning of any programs using the auxiliary I/O bus.
The sample programs in the Dynamic C
SAMPLES/RCM4200
folder provide further
examples.
5.2.2 Serial Communication Drivers
Library files included with Dynamic C provide a full range of serial communications sup-
port. The
RS232.LIB
library provides a set of circular-buffer-based serial functions. The
PACKET.LIB
library provides packet-based serial functions where packets can be delimited
by the 9th bit, by transmission gaps, or with user-defined special characters. Both libraries
provide blocking functions, which do not return until they are finished transmitting or
receiving, and nonblocking functions, which must be called repeatedly until they are fin-
ished, allowing other functions to be performed between calls. For more information, see
the Dynamic C Function Reference Manual and Technical Note TN213, Rabbit Serial
Port Software.
5.2.3 User Block
Certain function calls involve reading and storing calibration constants from/to the simulated
EEPROM in flash memory located at the top 2K of the reserved user block memory area
(3800–39FF). This leaves the address range 0–37FF in the user block available for your
application.
These address ranges may change in the future in response to the volatility in the flash
memory market, in particular sector size. The sample program USERBLOCK_INFO.C in
the Dynamic C SAMPLES\USERBLOCK folder can be used to determine the version of the
ID block, the size of the ID and user blocks, whether or not the ID/user blocks are mir-
rored, the total amount of flash memory used by the ID and user blocks, and the area of the
user block available for your application.
The USERBLOCK_CLEAR.C sample program shows you how to clear and write the con-
tents of the user block that you are using in your application (the calibration constants in
the reserved area and the ID block are protected).
50 RabbitCore RCM4200
5.2.4 SRAM Use
The RCM4200 module has a battery-backed data SRAM and a program-execution
SRAM. Dynamic C provides the
protected
keyword to identify variables that are to be
placed into the battery-backed SRAM. The compiler generates code that maintains two
copies of each protected variable in the battery-backed SRAM. The compiler also generates
a flag to indicate which copy of the protected variable is valid at the current time. This flag
is also stored in the battery-backed SRAM. When a protected variable is updated, the
“inactive” copy is modified, and is made “active” only when the update is 100% complete.
This assures the integrity of the data in case a reset or a power failure occurs during the
update process. At power-on the application program uses the active copy of the variable
pointed to by its associated flag.
The sample code below shows how a protected variable is defined and how its value can
be restored.
main() {
protected int state1, state2, state3;
...
_sysIsSoftReset(); // restore any protected variables
The
bbram
keyword may also be used instead if there is a need to store a variable in
battery-backed SRAM without affecting the performance of the application program. Data
integrity is not assured when a reset or power failure occurs during the update process.
Additional information on
bbram
and
protected
variables is available in the Dynamic C
Users Manual.
5.2.4.1 SRAM Chip Select Considerations
The basic SRAM memory on Rabbit-based boards is always connected to /CS1, /OE1, and
/WE1. Both the data SRAM and the program execution fast SRAM on the RCM4200
share /OE1.
The BIOS-defined macro,
CS1_ALWAYS_ON
, is set to 0 by default to disable /CS1 (set it
high). The macro may be redefined in the BIOS to 1, which will set a bit in the MMIDR
register that forces /CS1 to stay enabled (low). This capability is normally used to speed up
access time for battery-backed SRAM as long as no other memory chips are connected to
/OE1 and /WE1. Therefore, the
CS1_ALWAYS_ON
macro must remain at its default setting
of 0 to avoid conflicts between the data SRAM and the program execution fast SRAM.
User’s Manual 51
5.2.5 RCM4200 Cloning
The RCM4200 does not have a pull-up resistor on the PB1 (CLKA) line of the program-
ming port. Because of this, the procedure to generate clones from the RCM4200 differs
from that used for other RabbitCore modules and single-boards computers. You must set
the
CL_FORCE_MASTER_MODE
macro to 1 in the Dynamic C
CLONECONFIG.LIB
library
to use the RCM4200 as a master for cloning. An RCM4200 master will not run the appli-
cation, and further debugging is not possible as long as the
CL_FORCE_MASTER_MODE
macro is set to 1. Any cloned RCM4200 modules will be “sterile,” meaning that they can-
not be used as a master for cloning. To develop and debug an application on an RCM4200,
comment out the
CL_FORCE_MASTER_MODE
macro or set it to 0.
NOTE: Instead of defining this macro is your application, you may simply add the line
CL_FORCE_MASTER_MODE=1 under the Dynamic C Options > Project
Options “Defines” tab, then click OK. When you recompile your program, this will
have the same effect as setting the macro to 1 within the CLONECONFIG.LIB library.
See Technical Note TN207, Rabbit Cloning Board, for additional information on Rabbit
Semiconductors cloning board and how cloning is done.
5.2.6 Serial Flash Drivers
The Dynamic C LIB\SerialFlash\SFLASH.LIB and LIB\SerialFlash\
SFLASH_FAT.LIB libraries provide the function calls needed to use the serial flash. The
FAT file system function calls are in the Dynamic C LIB\FileSystem\
FAT_CONFIG.LIB library.
52 RabbitCore RCM4200
5.2.7 Prototyping Board Function Calls
The functions described in this section are for use with the Prototyping Board features.
The source code is in the Dynamic C LIB\RCM4xxx\RCM42xx.LIB library if you need
to modify it for your own board design.
NOTE: The analog input function calls are supported only by the RCM4200 model since
the RCM4210 does not have an A/D converter.
The sample programs in the Dynamic C
SAMPLES\RCM4200
folder illustrate the use of
the function calls.
Other generic functions applicable to all devices based on Rabbit microprocessors are
described in the Dynamic C Function Reference Manual.
5.2.7.1 Board Initialization
brdInit
void brdInit(void);
DESCRIPTION
Call this function at the beginning of your program. This function initializes Parallel
Ports A through E for use with the Prototyping Board, and on the RCM4200 model
loads the stored calibration constants for the A/D converter. This function call is intended
for demonstration purposes only, and can be modified for your applications.
Summary of Initialization
1. I/O port pins are configured for Prototyping Board operation.
2. Unused configurable I/O are set as tied outputs.
3. RS-232 is not enabled.
4. LEDs are off.
5. The slave port is disabled.
RETURN VALUE
None.
User’s Manual 53
5.2.7.2 Alerts
These function calls can be found in the Dynamic C LIB\RCM4xxx\RCM4xxx.LIB library.
timedAlert
void timedAlert(unsigned long timeout);
DESCRIPTION
Polls the real-time clock until a timeout occurs. The RCM4200 will be in a low-power
mode during this time. Once the timeout occurs, this function call will enable the normal
power source.
PARAMETER
timeout the duration of the timeout in seconds
RETURN VALUE
None.
digInAlert
void digInAlert(int dataport, int portbit, int value,
unsigned long timeout);
DESCRIPTION
Polls a digital input for a set value or until a timeout occurs. The RCM4400W will be
in a low-power mode during this time. Once a timeout occurs or the correct byte is
received, this function call will enable the normal power source and exit.
PARAMETERS
dataport the input port data register to poll (e.g., PADR)
portbit the input port bit (0–7) to poll
value the value of 0 or 1 to receive
timeout
the duration of the timeout in seconds (enter 0 for no timeout)
RETURN VALUE
None.
54 RabbitCore RCM4200
5.2.8 Analog Inputs (RCM4200 only)
The function calls used with the Prototyping Board features and the A/D converter on the
RCM4200 model are in the Dynamic C LIB\RCM4xxx\ADC_ADS7870.LIB library.
Dynamic C v. 10.07 or later is required to use the A/D converter function calls.
anaInConfig
unsigned int anaInConfig(unsigned int instructionbyte,
unsigned int cmd, long brate);
DESCRIPTION
Use this function to configure the A/D converter. This function will address the A/D
converter chip in Register Mode only, and will return an error if you try the Direct
Mode. Appendix B.4.3 provides additional addressing and command information.
ADS7870 Signal ADS7870 State RCM4200 Function/State
LN0 Input AIN0
LN1 Input AIN1
LN2 Input AIN2
LN3 Input AIN3
LN4 Input AIN4
LN5 Input AIN5
LN6 Input AIN6
LN7 Input AIN7
/RESET Input Board reset device
RISE/FALL Input Pulled up for SCLK active on rising edge
I/O0 Input Pulled down
I/O1 Input Pulled down
I/O2 Input Pulled down
I/O3 Input Pulled down
CONVERT Input Pulled down when not driven
BUSY Output PE0 pulled down; logic high state converter is busy
CCLKCNTRL Input Pulled down; 0 state sets CCLK as input
CCLK Input Pulled down; external conversion clock
SCLK Input PB0; serial data transfer clock
SDI Input PC4; 3-wire mode for serial data input
SDO Output PC5; serial data output /CS driven
/CS Input BUFEN pulled up; active-low enables serial interface
BUFIN Input Driven by VREF
VREF Output Connected to BUFIN and BUFOUT
BUFOUT Output Driven by VREF
User’s Manual 55
anaInConfig (continued)
PARAMETERS
instructionbyte
the instruction byte that will initiate a read or write operation
at 8 or 16 bits on the designated register address. For example,
checkid = anaInConfig(0x5F, 0, 9600);
// read ID and set byte rate
cmd
the command data that configure the registers addressed by the in-
struction byte. Enter 0 if you are performing a read operation. For
example,
i = anaInConfig(0x07, 0x3b, 0);
// write ref/osc reg and enable
brate
the serial clock transfer rate of 9600 to 115,200 bytes per second.
brate
must be set the first time this function is called. Enter 0 for
this parameter thereafter, for example,
anaInConfig(0x00, 0x00, 9600);
// resets device and sets byte rate
RETURN VALUE
0 on write operations
data value on read operations
SEE ALSO
anaInDriver
,
anaIn
,
brdInit
56 RabbitCore RCM4200
anaInDriver
int anaInDriver(unsigned int cmd);
DESCRIPTION
Reads the voltage of an analog input channel by serial-clocking an 8-bit command to
the A/D converter by its Direct Mode method. This function assumes that Mode1 (most
significant byte first) and the A/D converter oscillator have been enabled. See
anaIn-
Config()
for the setup.
The conversion begins immediately after the last data bit has been transferred. An ex-
ception error will occur if Direct Mode bit D7 is not set.
An exception error will occur if Direct Mode bit D7 is not set.
PARAMETERS
cmd contains a gain code and a channel code as follows.
D7—1; D6–D4—Gain Code; D3–D0—Channel Code
Use the following calculation and the tables below to determine cmd:
cmd = 0x80 | (gain_code*16) + channel_code
Gain Code Gain
Multiplier
1
2
4
5
8
10
16
20
User’s Manual 57
anaInDriver (continued)
RETURN VALUE
A value corresponding to the voltage on the analog input channel:
0–2047 for 11-bit conversions
-2048–2047 for 12-bit conversions
ADTIMEOUT
(-4095) if the conversion is incomplete or busy bit timeout
ADOVERFLOW
(-4096) for overflow or out of range
SEE ALSO
anaInConfig
,
anaIn
,
brdInit
Channel Code Differential Input
Lines Channel Code Single-Ended
Input Lines*
* Negative input is ground.
4–20 mA
Lines
0 +AIN0 -AIN1 8 AIN0 AIN0*
1 +AIN2 -AIN3 9 AIN1 AIN1*
2 +AIN4 -AIN5 10 AIN2 AIN2*
3
Not accessible on Prototyping Board
+AIN6 -AIN7 11 AIN3 AIN3
4 -AIN0 +AIN1 12 AIN4 AIN4
5 -AIN2 +AIN3 13 AIN5 AIN5
6 -AIN4 +AIN5 14 AIN6 AIN6
7
Not accessible on Prototyping Board
-AIN6 +AIN7 15 AIN7 AIN7*
58 RabbitCore RCM4200
anaIn
int anaIn(unsigned int channel, int opmode, int gaincode);
DESCRIPTION
Reads the value of an analog input channel using the Direct Mode method of addressing
the A/D converter. Note that it takes about 1 second to ensure an internal capacitor on
the A/D converter is charged when the function is called the first time.
PARAMETERS
channel
the channel number (0 to 7) corresponding to LN0 to LN7.
opmode
the mode of operation:
SINGLE
—single-ended input
DIFF
—differential input
mAMP
—4–20 mA input
gaincode the gain code of 0 to 7 (applies only to Prototyping Board):
channel SINGLE DIFF mAMP
0 +AIN0 +AIN0 -AIN1 +AIN0*
* Not accessible on Prototyping Board.
1 +AIN1 +AIN1 -AIN0* +AIN1*
2 +AIN2 +AIN2 -AIN3 +AIN2*
3 +AIN3 +AIN3 -AIN2* +AIN3
4 +AIN4 +AIN4 -AIN5 +AIN4
5 +AIN5 +AIN5 -AIN4* +AIN5
6 +AIN6 +AIN6 -AIN7* +AIN6
7 +AIN7 +AIN7 -AIN6* +AIN7*
Gain Code Gain
Multiplier Voltage Range
(V)
0 ×1 0–22.5
1 ×2 0–11.25
405.6
504.5
802.8
5 ×10 0–2.25
6 ×16 0–1.41
7 ×20 0–1.126
User’s Manual 59
anaIn (continued)
RETURN VALUE
A value corresponding to the voltage on the analog input channel:
0–2047 for single-ended conversions
-2048–2047 for differential conversions
ADTIMEOUT
(-4095) if the conversion is incomplete or busy bit timeout
ADOVERFLOW
(-4096) for overflow or out of range
SEE ALSO
anaIn
,
anaInConfig
,
anaInDriver
60 RabbitCore RCM4200
anaInCalib
int anaInCalib(int channel, int opmode, int gaincode,
int value1, float volts1, int value2, float volts2);
DESCRIPTION
Calibrates the response of the desired A/D converter channel as a linear function using
the two conversion points provided. Four values are calculated and placed into global
tables
_adcCalibS
,
_adcCalibD
, and
adcCalibM
to be later stored into simulat-
ed EEPROM using the function
anaInEEWr()
. Each channel will have a linear con-
stant and a voltage offset.
PARAMETERS
channel the channel number (0 to 7) corresponding to LN0 to LN7.
opmode
the mode of operation:
SINGLE
—single-ended input
DIFF
—differential input
mAMP
—4–20 mA input
channel SINGLE DIFF mAMP
0 +AIN0 +AIN0 -AIN1 +AIN0*
* Not accessible on Prototyping Board.
1 +AIN1 +AIN1 -AIN0* +AIN1*
2 +AIN2 +AIN2 -AIN3 +AIN2*
3 +AIN3 +AIN3 -AIN2* +AIN3
4 +AIN4 +AIN4 -AIN5 +AIN4
5 +AIN5 +AIN5 -AIN4* +AIN5
6 +AIN6 +AIN6 -AIN7* +AIN6
7 +AIN7 +AIN7 -AIN6* +AIN7*
User’s Manual 61
anaInCalib (continued)
gaincode the gain code of 0 to 7 (applies only to Prototyping Board):
value1 the first A/D converter channel raw count value (0–2047)
volts1 the voltage or current corresponding to the first A/D converter
channel value (0 to +20 V or 4 to 20 mA)
value2 the second A/D converter channel raw count value (0–2047)
volts2 the voltage or current corresponding to the first A/D converter
channel value (0 to +20 V or 4 to 20 mA)
RETURN VALUE
0 if successful.
-1 if not able to make calibration constants.
SEE ALSO
anaIn
,
anaInVolts
,
anaInmAmps
,
anaInDiff
,
anaInCalib
,
brdInit
Gain Code Gain
Multiplier Voltage Range
(V)
0 ×1 0–22.5
1 ×2 0–11.25
405.6
504.5
802.8
5 ×10 0–2.25
6 ×16 0–1.41
7 ×20 0–1.126
62 RabbitCore RCM4200
anaInVolts
float anaInVolts(unsigned int channel, unsigned int gaincode);
DESCRIPTION
Reads the state of a single-ended analog input channel and uses the previously set
calibration constants to convert it to volts.
PARAMETERS
channel the channel number (0 to 7) corresponding to LN0 to LN7.
gaincode the gain code of 0 to 7 (applies only to Prototyping Board):
Channel Code Single-Ended
Input Lines*
* Negative input is ground.
Voltage Range
(V)
Applies to Prototyping Board.
0 +AIN0 0–22.5
1 +AIN1 0–22.5
2 +AIN2 0–22.5
3 +AIN3 0–22.5
4 +AIN4 0–22.5
5 +AIN5 0–22.5
6 +AIN6 0–22.5
7+AIN7
0–2
Used for thermistor in sample program.
Gain Code Gain
Multiplier Voltage Range*
(V)
* Applies to Prototyping Board.
0 ×1 0–22.5
1 ×2 0–11.25
405.6
504.5
802.8
5 ×10 0–2.25
6 ×16 0–1.41
7 ×20 0–1.126
User’s Manual 63
anaInVolts (continued)
RETURN VALUE
A voltage value corresponding to the voltage on the analog input channel.
ADTIMEOUT
(-4095) if the conversion is incomplete or busy bit timeout.
ADOVERFLOW
(-4096) for overflow or out of range.
SEE ALSO
anaInCalib
,
anaIn
,
anaInmAmps
,
brdInit
64 RabbitCore RCM4200
anaInDiff
float anaInDiff(unsigned int channel, unsigned int gaincode);
DESCRIPTION
Reads the state of differential analog input channels and uses the previously set calibra-
tion constants to convert it to volts.
PARAMETERS
channel the channel number (0 to 7) corresponding to LN0 to LN7.
gaincode the gain code of 0 to 7 (applies only to Prototyping Board):
channel DIFF Voltage Range
(V)
0+AIN0 -AIN1
-22.5 to +22.5*
* Accessible on Prototyping Board.
1+AIN1 -AIN1
2 +AIN2 -AIN3 -22.5 to +22.5*
3+AIN3 -AIN3
4 +AIN4 -AIN5 -22.5 to +22.5*
5+AIN5 -AIN5
6+AIN6 -AIN7
7+AIN7 -AIN7
Gain Code Gain
Multiplier Voltage Range
(V)
0 ×1 -22.5 – +22.5
1 ×2 -11.25 – +11.25
2 ×4 -5.6 – +5.6
3 ×5 -4.5 – +4.5
4 ×8 -2.8 – +2.8
5 ×10 -2.25 – +2.25
6 ×16 -1.41 – +1.41
7 ×20 -1.126 – +1.126
User’s Manual 65
anaInDiff (continued)
RETURN VALUE
A voltage value corresponding to the voltage differential on the analog input channel.
ADTIMEOUT
(-4095) if the conversion is incomplete or busy bit timeout.
ADOVERFLOW
(-4096) for overflow or out of range.
SEE ALSO
anaInCalib
,
anaIn
,
anaInmAmps
,
brdInit
66 RabbitCore RCM4200
anaInmAmps
float anaInmAmps(unsigned int channel);
DESCRIPTION
Reads the state of an analog input channel and uses the previously set calibration con-
stants to convert it to current.
PARAMETERS
channel the channel number (0 to 7) corresponding to LN0 to LN7.
RETURN VALUE
A current value between 4.00 and 20.00 mA corresponding to the current on the analog
input channel.
ADTIMEOUT
(-4095) if the conversion is incomplete or busy bit timeout.
ADOVERFLOW
(-4096) for overflow or out of range.
SEE ALSO
anaInCalib
,
anaIn
,
anaInVolts
Channel Code 4–20 mA
Input Lines*
* Negative input is ground.
0+AIN0
1+AIN1
2+AIN2
3+AIN3
Applies to Prototyping Board.
4 +AIN4*
5 +AIN5*
6 +AIN6*
7+AIN7
User’s Manual 67
anaInEERd
root int anaInEERd(unsigned int channel, unsigned int opmode,
unsigned int gaincode);
DESCRIPTION
Reads the calibration constants, gain, and offset for an input based on their designated
position in the flash memory, and places them into global tables
_adcCalibS
,
_adcCalibD
, and
_adcCalibM
for analog inputs. Depending on the flash size, the
following macros can be used to identify the starting address for these locations.
ADC_CALIB_ADDRS, address start of single-ended analog input channels
ADC_CALIB_ADDRD, address start of differential analog input channels
ADC_CALIB_ADDRM, address start of milliamp analog input channels
NOTE: This function cannot be run in RAM.
PARAMETER
channel the channel number (0 to 7) corresponding to LN0 to LN7.
opmode
the mode of operation:
SINGLE
—single-ended input
DIFF
—differential input
mAMP
—4–20 mA input
channel SINGLE DIFF mAMP
0 +AIN0 +AIN0 -AIN1 +AIN0*
* Not accessible on Prototyping Board.
1 +AIN1 +AIN1 -AIN0* +AIN1*
2 +AIN2 +AIN2 -AIN3 +AIN2*
3 +AIN3 +AIN3 -AIN2* +AIN3
4 +AIN4 +AIN4 -AIN5 +AIN4
5 +AIN5 +AIN5 -AIN4* +AIN5
6 +AIN6 +AIN6 -AIN7* +AIN6
7 +AIN7 +AIN7 -AIN6* +AIN7*
ALLCHAN read all channels for selected opmode
68 RabbitCore RCM4200
anaInEERd (continued)
gaincode the gain code of 0 to 7. The gaincode parameter is ignored when
channel is ALLCHAN.
RETURN VALUE
0 if successful.
-1 if address is invalid or out of range.
SEE ALSO
anaInEEWr
,
anaInCalib
Gain Code Gain
Multiplier Voltage Range*
(V)
* Applies to Prototyping Board.
0×1 0–22.5
1×2 0–11.25
2×4 0–5.6
3×5 0–4.5
4×8 0–2.8
5×10 0–2.25
6×16 0–1.41
7×20 0–1.126
User’s Manual 69
anaInEEWr
int anaInEEWr(unsigned int channel, int opmode,
unsigned int gaincode);
DESCRIPTION
Writes the calibration constants, gain, and offset for an input based from global tables
_adcCalibS
,
_adcCalibD
, and
_adcCalibM
to designated positions in the flash
memory. Depending on the flash size, the following macros can be used to identify the
starting address for these locations.
ADC_CALIB_ADDRS, address start of single-ended analog input channels
ADC_CALIB_ADDRD, address start of differential analog input channels
ADC_CALIB_ADDRM, address start of milliamp analog input channels
NOTE: This function cannot be run in RAM.
PARAMETER
channel the channel number (0 to 7) corresponding to LN0 to LN7.
opmode
the mode of operation:
SINGLE
—single-ended input
DIFF
—differential input
mAMP
—4–20 mA input
channel SINGLE DIFF mAMP
0 +AIN0 +AIN0 -AIN1 +AIN0*
* Not accessible on Prototyping Board.
1 +AIN1 +AIN1 -AIN0* +AIN1*
2 +AIN2 +AIN2 -AIN3 +AIN2*
3 +AIN3 +AIN3 -AIN2* +AIN3
4 +AIN4 +AIN4 -AIN5 +AIN4
5 +AIN5 +AIN5 -AIN4* +AIN5
6 +AIN6 +AIN6 -AIN7* +AIN6
7 +AIN7 +AIN7 -AIN6* +AIN7*
ALLCHAN read all channels for selected opmode
70 RabbitCore RCM4200
anaInEEWr (continued)
gaincode the gain code of 0 to 7. The gaincode parameter is ignored when
channel is ALLCHAN.
RETURN VALUE
0 if successful
-1 if address is invalid or out of range.
SEE ALSO
anaInEEWr
,
anaInCalib
Gain Code Gain
Multiplier Voltage Range*
(V)
* Applies to Prototyping Board.
0 ×1 0–22.5
1 ×2 0–11.25
405.6
504.5
802.8
5 ×10 0–2.25
6 ×16 0–1.41
7 ×20 0–1.126
User’s Manual 71
5.3 Upgrading Dynamic C
Dynamic C patches that focus on bug fixes are available from time to time. Check the Web
site www.rabbit.com/support/ for the latest patches, workarounds, and bug fixes.
5.3.1 Add-On Modules
Dynamic C installations are designed for use with the board they are included with, and
are included at no charge as part of our low-cost kits. Rabbit Semiconductor offers for
purchase add-on Dynamic C modules including the popular µC/OS-II real-time operating
system, as well as PPP, Advanced Encryption Standard (AES), FAT file system, Rabbit-
Web, and other select libraries.
NOTE: Version 2.10 or later of the Dynamic C FAT file system module is required for
the RCM4200 modules.
Each Dynamic C add-on module has complete documentation and sample programs to
illustrate the functionality of the software calls in the module. Visit our Web site at
www.rabbit.com for further information and complete documentation for each module.
In addition to the Web-based technical support included at no extra charge, a one-year
telephone-based technical support module is also available for purchase.
72 RabbitCore RCM4200
WWWW
User’s Manual 73
6. USING THE TCP/IP FEATURES
6.1 TCP/IP Connections
Programming and development can be done with the RCM4200 without connecting the
Ethernet port to a network. However, if you will be running the sample programs that use
the Ethernet capability or will be doing Ethernet-enabled development, you should connect
the RCM4200 module’s Ethernet port at this time.
Before proceeding you will need to have the following items.
If you don’t have Ethernet access, you will need at least a 10Base-T Ethernet card
(available from your favorite computer supplier) installed in a PC.
Two RJ-45 straight-through Ethernet cables and a hub, or an RJ-45 crossover Ethernet
cable.
Figure 14 shows how to identify the two Ethernet cables based on the wires in the trans-
parent RJ-45 connectors.
Figure 14. How to Identify Straight-Through and Crossover Ethernet Cables
Ethernet cables and a 10Base-T Ethernet hub are available from Rabbit Semiconductor in
a TCP/IP tool kit. More information is available at www.rabbit.com.
Now you should be able to make your connections.
Crossover
Cable
Straight-
Through
Cable
Same
color order
in connectors
Different
color order
in connectors
74 RabbitCore RCM4200
1. Connect the AC adapter and the serial programming cable as shown in Chapter 2, “Get-
ting Started.”
2. Ethernet Connections
There are four options for connecting the RCM4200 module to a network for develop-
ment and runtime purposes. The first two options permit total freedom of action in
selecting network addresses and use of the “network,” as no action can interfere with
other users. We recommend one of these options for initial development.
No LAN The simplest alternative for desktop development. Connect the RCM4200
module’s Ethernet port directly to the PCs network interface card using an RJ-45
crossover cable. A crossover cable is a special cable that flips some connections
between the two connectors and permits direct connection of two client systems. A
standard RJ-45 network cable will not work for this purpose.
Micro-LAN — Another simple alternative for desktop development. Use a small Eth-
ernet 10Base-T hub and connect both the PC’s network interface card and the
RCM4200 module’s Ethernet port to it using standard network cables.
The following options require more care in address selection and testing actions, as
conflicts with other users, servers and systems can occur:
LAN — Connect the RCM4200 module’s Ethernet port to an existing LAN, preferably
one to which the development PC is already connected. You will need to obtain IP
addressing information from your network administrator.
WAN — The RCM4200 is capable of direct connection to the Internet and other Wide
Area Networks, but exceptional care should be used with IP address settings and all
network-related programming and development. We recommend that development and
debugging be done on a local network before connecting a RabbitCore system to the
Internet.
TIP: Checking and debugging the initial setup on a micro-LAN is recommended before
connecting the system to a LAN or WAN.
The PC running Dynamic C does not need to be the PC with the Ethernet card.
3. Apply Power
Plug in the AC adapter. The RCM4200 module and Prototyping Board are now ready to
be used.
User’s Manual 75
6.2 TCP/IP Primer on IP Addresses
Obtaining IP addresses to interact over an existing, operating, network can involve a num-
ber of complications, and must usually be done with cooperation from your ISP and/or
network systems administrator. For this reason, it is suggested that the user begin instead
by using a direct connection between a PC and the RCM4200 using an Ethernet crossover
cable or a simple arrangement with a hub. (A crossover cable should not be confused with
regular straight through cables.)
In order to set up this direct connection, the user will have to use a PC without networking,
or disconnect a PC from the corporate network, or install a second Ethernet adapter and set
up a separate private network attached to the second Ethernet adapter. Disconnecting your
PC from the corporate network may be easy or nearly impossible, depending on how it is
set up. If your PC boots from the network or is dependent on the network for some or all
of its disks, then it probably should not be disconnected. If a second Ethernet adapter is
used, be aware that Windows TCP/IP will send messages to one adapter or the other,
depending on the IP address and the binding order in Microsoft products. Thus you should
have different ranges of IP addresses on your private network from those used on the cor-
porate network. If both networks service the same IP address, then Windows may send a
packet intended for your private network to the corporate network. A similar situation will
take place if you use a dial-up line to send a packet to the Internet. Windows may try to
send it via the local Ethernet network if it is also valid for that network.
The following IP addresses are set aside for local networks and are not allowed on the
Internet: 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, and 192.168.0.0 to
192.168.255.255.
The RCM4200 uses a 10Base-T type of Ethernet connection, which is the most common
scheme. The RJ-45 connectors are similar to U.S. style telephone connectors, except they
are larger and have 8 contacts.
An alternative to the direct connection using a crossover cable is a direct connection using
a hub. The hub relays packets received on any port to all of the ports on the hub. Hubs are
low in cost and are readily available. The RCM4200 uses 10 Mbps Ethernet, so the hub or
Ethernet adapter can be a 10 Mbps unit or a 10/100 Mbps unit.
In a corporate setting where the Internet is brought in via a high-speed line, there are typi-
cally machines between the outside Internet and the internal network. These machines
include a combination of proxy servers and firewalls that filter and multiplex Internet traf-
fic. In the configuration below, the RCM4200 could be given a fixed address so any of the
computers on the local network would be able to contact it. It may be possible to configure
the firewall or proxy server to allow hosts on the Internet to directly contact the controller,
but it would probably be easier to place the controller directly on the external network out-
side of the firewall. This avoids some of the configuration complications by sacrificing
some security.
76 RabbitCore RCM4200
If your system administrator can give you an Ethernet cable along with its IP address, the
netmask and the gateway address, then you may be able to run the sample programs with-
out having to setup a direct connection between your computer and the RCM4200. You
will also need the IP address of the nameserver, the name or IP address of your mail
server, and your domain name for some of the sample programs.
Hub(s)
Firewall
Proxy
Server
T1 in Adapter
Ethernet Ethernet
Network
RCM4200
System
Typical Corporate Network
User’s Manual 77
6.2.1 IP Addresses Explained
IP (Internet Protocol) addresses are expressed as 4 decimal numbers separated by periods,
for example:
216.103.126.155
10.1.1.6
Each decimal number must be between 0 and 255. The total IP address is a 32-bit number
consisting of the 4 bytes expressed as shown above. A local network uses a group of adja-
cent IP addresses. There are always 2N IP addresses in a local network. The netmask (also
called subnet mask) determines how many IP addresses belong to the local network. The
netmask is also a 32-bit address expressed in the same form as the IP address. An example
netmask is:
255.255.255.0
This netmask has 8 zero bits in the least significant portion, and this means that 28
addresses are a part of the local network. Applied to the IP address above
(216.103.126.155), this netmask would indicate that the following IP addresses belong to
the local network:
216.103.126.0
216.103.126.1
216.103.126.2
etc.
216.103.126.254
216.103.126.255
The lowest and highest address are reserved for special purposes. The lowest address
(216.102.126.0) is used to identify the local network. The highest address
(216.102.126.255) is used as a broadcast address. Usually one other address is used for the
address of the gateway out of the network. This leaves 256 - 3 = 253 available IP
addresses for the example given.
78 RabbitCore RCM4200
6.2.2 How IP Addresses are Used
The actual hardware connection via an Ethernet uses Ethernet adapter addresses (also
called MAC addresses). These are 48-bit addresses and are unique for every Ethernet
adapter manufactured. In order to send a packet to another computer, given the IP address
of the other computer, it is first determined if the packet needs to be sent directly to the
other computer or to the gateway. In either case, there is an Ethernet address on the local
network to which the packet must be sent. A table is maintained to allow the protocol
driver to determine the MAC address corresponding to a particular IP address. If the table
is empty, the MAC address is determined by sending an Ethernet broadcast packet to all
devices on the local network asking the device with the desired IP address to answer with
its MAC address. In this way, the table entry can be filled in. If no device answers, then
the device is nonexistent or inoperative, and the packet cannot be sent.
Some IP address ranges are reserved for use on internal networks, and can be allocated
freely as long as no two internal hosts have the same IP address. These internal IP
addresses are not routed to the Internet, and any internal hosts using one of these reserved
IP addresses cannot communicate on the external Internet without being connected to a
host that has a valid Internet IP address. The host would either translate the data, or it
would act as a proxy.
Each RCM4200 RabbitCore module has its own unique MAC address, which consists of
the prefix 0090C2 followed by a code that is unique to each RCM4200 module. For exam-
ple, a MAC address might be 0090C2C002C0.
TIP: You can always obtain the MAC address on your module by running the sample
program DISPLAY_MAC.C from the SAMPLES\TCPIP folder.
User’s Manual 79
6.2.3 Dynamically Assigned Internet Addresses
In many instances, devices on a network do not have fixed IP addresses. This is the case
when, for example, you are assigned an IP address dynamically by your dial-up Internet
service provider (ISP) or when you have a device that provides your IP addresses using
the Dynamic Host Configuration Protocol (DHCP). The RCM4200 modules can use such
IP addresses to send and receive packets on the Internet, but you must take into account
that this IP address may only be valid for the duration of the call or for a period of time,
and could be a private IP address that is not directly accessible to others on the Internet.
These addresses can be used to perform some Internet tasks such as sending e-mail or
browsing the Web, but it is more difficult to participate in conversations that originate
elsewhere on the Internet. If you want to find out this dynamically assigned IP address,
under Windows NT or later you can run the ipconfig command (Start > Run >cmd)
while you are connected and look at the interface used to connect to the Internet.
Many networks use IP addresses that are assigned using DHCP. When your computer
comes up, and periodically after that, it requests its networking information from a DHCP
server. The DHCP server may try to give you the same address each time, but a fixed IP
address is usually not guaranteed.
If you are not concerned about accessing the RCM4200 from the Internet, you can place
the RCM4200 on the internal network using an IP address assigned either statically or
through DHCP.
80 RabbitCore RCM4200
6.3 Placing Your Device on the Network
In many corporate settings, users are isolated from the Internet by a firewall and/or a
proxy server. These devices attempt to secure the company from unauthorized network
traffic, and usually work by disallowing traffic that did not originate from inside the net-
work. If you want users on the Internet to communicate with your RCM4200, you have
several options. You can either place the RCM4200 directly on the Internet with a real
Internet address or place it behind the firewall. If you place the RCM4200 behind the fire-
wall, you need to configure the firewall to translate and forward packets from the Internet
to the RCM4200.
User’s Manual 81
6.4 Running TCP/IP Sample Programs
We have provided a number of sample programs demonstrating various uses of TCP/IP for
networking embedded systems. These programs require you to connect your PC and the
RCM4200 module together on the same network. This network can be a local private net-
work (preferred for initial experimentation and debugging), or a connection via the Internet.
User’s PC
Ethernet
crossover
cable
Direct Connection
(network of 2 computers)
Hub
Ethernet
cables
To additional
network
elements
Direct Connection Using a Hub
RCM4200
System RCM4200
System
82 RabbitCore RCM4200
6.4.1 How to Set IP Addresses in the Sample Programs
With the introduction of Dynamic C 7.30 we have taken steps to make it easier to run
many of our sample programs. You will see a TCPCONFIG macro. This macro tells
Dynamic C to select your configuration from a list of default configurations. You will
have three choices when you encounter a sample program with the TCPCONFIG macro.
1. You can replace the TCPCONFIG macro with individual MY_IP_ADDRESS, MY_NET-
MASK, MY_GATEWAY, and MY_NAMESERVER macros in each program.
2. You can leave TCPCONFIG at the usual default of 1, which will set the IP configurations
to 10.10.6.100, the netmask to 255.255.255.0, and the nameserver and gateway
to 10.10.6.1. If you would like to change the default values, for example, to use an IP
address of 10.1.1.2 for the RCM4200 module, and 10.1.1.1 for your PC, you can
edit the values in the section that directly follows the “General Configuration” com-
ment in the TCP_CONFIG.LIB library. You will find this library in the LIB\TCPIP
directory.
3. You can create a CUSTOM_CONFIG.LIB library and use a TCPCONFIG value greater
than 100. Instructions for doing this are at the beginning of the TCP_CONFIG.LIB
library in the LIB\TCPIP directory.
There are some other “standard” configurations for TCPCONFIG that let you select differ-
ent features such as DHCP. Their values are documented at the top of the TCP_CON-
FIG.LIB library in the LIB\TCPIP directory. More information is available in the
Dynamic C TCP/IP Users Manual.
User’s Manual 83
6.4.2 How to Set Up your Computer for Direct Connect
Follow these instructions to set up your PC or notebook. Check with your administrator if
you are unable to change the settings as described here since you may need administrator
privileges. The instructions are specifically for Windows 2000, but the interface is similar
for other versions of Windows.
TIP: If you are using a PC that is already on a network, you will disconnect the PC from
that network to run these sample programs. Write down the existing settings before
changing them to facilitate restoring them when you are finished with the sample pro-
grams and reconnect your PC to the network.
1. Go to the control panel (Start > Settings > Control Panel), and then double-click the
Network icon.
2. Select the network interface card used for the Ethernet interface you intend to use (e.g.,
TCP/IP Xircom Credit Card Network Adapter) and click on the “Properties” button.
Depending on which version of Windows your PC is running, you may have to select
the “Local Area Connection” first, and then click on the “Properties” button to bring up
the Ethernet interface dialog. Then “Configure” your interface card for a “10Base-T
Half-Duplex” or an “Auto-Negotiation” connection on the “Advanced” tab.
NOTE: Your network interface card will likely have a different name.
3. Now select the IP Address tab, and check Specify an IP Address, or select TCP/IP and
click on “Properties” to assign an IP address to your computer (this will disable “obtain
an IP address automatically”):
IP Address : 10.10.6.101
Netmask : 255.255.255.0
Default gateway : 10.10.6.1
4. Click <OK> or <Close> to exit the various dialog boxes.
RCM4200
User’s PC
Ethernet
crossover
cable
IP 10.10.6.101
Netmask
255.255.255.0
Direct Connection PC to RCM4200 Module
System
84 RabbitCore RCM4200
6.5 Run the PINGME.C Sample Program
Connect the crossover cable from your computers Ethernet port to the RCM4200 mod-
ule’s RJ-45 Ethernet connector. Open this sample program from the SAMPLES\TCPIP\
ICMP folder, compile the program, and start it running under Dynamic C. The crossover
cable is connected from your computers Ethernet adapter to the RCM4200 module’s RJ-45
Ethernet connector. When the program starts running, the green LINK light on the RCM4200
module should be on to indicate an Ethernet connection is made. (Note: If the LINK light
does not light, you may not be using a crossover cable, or if you are using a hub with
straight-through cables perhaps the power is off on the hub.)
The next step is to ping the module from your PC. This can be done by bringing up the
MS-DOS window and running the pingme program:
ping 10.10.6.101
or by Start > Run
and typing the entry
ping 10.10.6.101
The ping routine will ping the module four times and write a summary message on the
screen describing the operation.
6.6 Running Additional Sample Programs With Direct Connect
The following sample programs are in the Dynamic C SAMPLES\RCM4200\TCPIP\
folder.
BROWSELED.C—This program demonstrates a basic controller running a Web page.
Two “device LEDs” are created along with two buttons to toggle them. Users can use
their Web browser to change the status of the lights. The DS2 and DS3 LEDs on the
Prototyping Board will match those on the Web page. As long as you have not modified
the TCPCONFIG 1 macro in the sample program, enter the following server address in
your Web browser to bring up the Web page served by the sample program.
http://10.10.6.100.
Otherwise use the TCP/IP settings you entered in the TCP_CONFIG.LIB library.
PINGLED.C—This program demonstrates ICMP by pinging a remote host. It will flash
LEDs DS2 and DS3 on the Prototyping Board when a ping is sent and received.
SMTP.C—This program demonstrates using the SMTP library to send an e-mail when
the S2 and S3 switches on the Prototyping Board are pressed. LEDs DS2 and DS3 on
the Prototyping Board will light up when e-mail is being sent.
User’s Manual 85
6.7 Where Do I Go From Here?
NOTE: If you purchased your RCM4200 through a distributor or through a Rabbit partner,
contact the distributor or partner first for technical support.
If there are any problems at this point:
Use the Dynamic C Help menu to get further assistance with Dynamic C.
Check the Rabbit Semiconductor Technical Bulletin Board and forums at
www.rabbit.com/support/bb/ and at www.rabbit.com/forums/.
Use the Technical Support e-mail form at www.rabbit.com/support/.
If the sample programs ran fine, you are now ready to go on.
Additional sample programs are described in the Dynamic C TCP/IP Users Manual.
Please refer to the Dynamic C TCP/IP Users Manual to develop your own applications.
An Introduction to TCP/IP provides background information on TCP/IP, and is available
on the CD and on our Web site.
86 RabbitCore RCM4200
User’s Manual 87
APPENDIX A. RCM4200 SPECIFICATIONS
Appendix A provides the specifications for the RCM4200, and
describes the conformal coating.
Please refer to the RCM4200 footprint diagram later in this appendix for precise header locations. 0,125 d’a (3 2" x 2 Figure A-1. RCM4200 Dimensions NOTE: All measurements are in inches followed by millimeters enclosed in parentheses. All dimensions have a manufacturing tolerance of 10.01" (0.25 mm). 88
88 RabbitCore RCM4200
A.1 Electrical and Mechanical Characteristics
Figure A-1 shows the mechanical dimensions for the RCM4200.
Figure A-1. RCM4200 Dimensions
NOTE: All measurements are in inches followed by millimeters enclosed in parentheses.
All dimensions have a manufacturing tolerance of ±0.01" (0.25 mm).
Please refer to the RCM4200
footprint diagram later in this
appendix for precise header
locations.
× 2
0.125 dia
(3.2)
0.19
(5)
C43
L2
3
41
Y3
C82
R5 R2
J1
C76
R3
R51
R31
R20
C81
C58
C67
C88
J3
JP11
JP10
JP12
JP1
JP2
JP9
JP6
JP7
JP3
JP5
JP4
C3
C2
C17
C16
R6
R8
R46
R45
R43
R44
R39
R42
U1
R7
C1
C86
L1
C74
U15
C75
R40
R41
JP14
JP15
JP13
U14
C85
C78
L7
C72
C65
C87
C57 U13
R34
R35
R33
R32
Q3
C77
C5
Y4
R14
R12
U4
C24 JP16R13
DS1
LINK
SPEED
FDX
DS2
DS3
R47
R48
R49
C33
C32
C31
R50
C26
R52 C25
C19
R4 C20 C18
U3
Q1
C7
R36
R29
C8
C9 C10
C6
C11 C12
JP8
C15 R27
R11
R16
Y2
U2
R9
C13
C14
C39
U5
C27
C21 R1 R10
D1
R22
C28
C29
C36
C37
C38
C30
C34
C35
R18
U7
U6
R21
R19
R15
C23
R23
0.10
(2.5)
J2
0.62
(16)
1.84
(47)
0.661
(16.8)
1.84
(47)
1.10
(28)
0.54
(13.7)
0.11
(2.8)
0.23
(5.8)
0.84
(21)
0.47
(12)
0.11
(2.8)
0.23
(5.8)
0.77
(20)
0.064
(1.6)
0.064
(1.6)
0.35
(8.9)
0.50
(13)
0.72
(18)
2.42
(61)
2.42
(61)
User’s Manual 89
It is recommended that you allow for an “exclusion zone” of 0.04" (1 mm) around the
RCM4200 in all directions when the RCM4200 is incorporated into an assembly that
includes other printed circuit boards. An “exclusion zone” of 0.08" (2 mm) is recom-
mended below the RCM4200 when the RCM4200 is plugged into another assembly.
Figure A-2 shows this “exclusion zone.”
Figure A-2. RCM4200 “Exclusion Zone”
J3
Exclusion
Zone
1.84
(47)
0.58
(15)
0.58
(15)
2.50
(63)
1.92
(49)
0.08
(2)
0.08
(2)
2.42
(61)
90 RabbitCore RCM4200
Table A-1 lists the electrical, mechanical, and environmental specifications for the RCM4200.
Table A-1. RCM4200 Specifications
Parameter RCM4200 RCM4210
Microprocessor Rabbit® 4000 at 58.98 MHz Rabbit® 4000 at 29.49 MHz
EMI Reduction Spectrum spreader for reduced EMI (radiated emissions)
Ethernet Port 10/100Base-T, RJ-45, 3 LEDs
Data SRAM 512K (8-bit)
Program Execution Fast
SRAM 512K (8-bit)
Flash Memory 512K (8-bit)
Serial Flash Memory 8 Mbytes 4 Mbytes
Backup Battery Connection for user-supplied backup battery
(to support RTC and data SRAM)
General Purpose I/O
25 parallel digital I/O lines:
configurable with four layers of
alternate functions
35 parallel digital I/O lines:
• configurable with four layers
of alternate functions
Additional Inputs 2 startup mode, reset in, CONVERT 2 startup mode, reset in
Additional Outputs Status, reset out, analog VREF Status, reset out
Analog Inputs
8 channels single-ended
or 4 channels differential
Programmable gain
1, 2, 4, 5, 8, 10, 16, and 20 V/V
A/D Converter
Resolution 12 bits (11 bits single-ended)
A/D Conversion Time
(including 120 µs raw 180 µs
Auxiliary I/O Bus Can be configured for 8 data lines and
6 address lines (shared with parallel I/O lines), plus I/O read/write
Serial Ports
4 shared high-speed, CMOS-
compatible ports:
all 4 configurable as asynchronous
(with IrDA), 4 as clocked serial
(SPI)
1 asynchronous clocked serial port
shared with programming port
1 clocked serial port shared with
serial flash
1 clocked serial port shared with
A/D converter
5 shared high-speed, CMOS-
compatible ports:
all 5 configurable as asynchronous
(with IrDA), 4 as clocked serial
(SPI), and 1 as SDLC/HDLC
1 clocked serial port shared with
serial flash
1 asynchronous clocked serial port
dedicated for programming
User’s Manual 91
Serial Rate Maximum asynchronous baud rate = CLK/8
Slave Interface Slave port allows the RCM4200 to be used as an intelligent peripheral device
slaved to a master processor
Real Time Clock Yes
Timers Ten 8-bit timers (6 cascadable from the first),
one 10-bit timer with 2 match registers, and
one 16-bit timer with 4 outputs and 8 set/reset registers
Watchdog/Supervisor Yes
Pulse-Width Modulators
3 channels synchronized PWM
with 10-bit counter
3 channels variable-phase or syn-
chronized PWM with 16-bit
counter
4 channels synchronized PWM
with 10-bit counter
4 channels variable-phase or syn-
chronized PWM with 16-bit
counter
Input Capture 2 input capture channels can be used to time input signals from various port
pins
Quadrature Decoder 1 quadrature decoder channel accepts
inputs from external incremental
encoder modules
2 quadrature decoder channels accept
inputs from external incremental
encoder modules
Power
(pins unloaded) 3.0–3.6 V DC, 240 mA (typ.) @ 3.3 V,
275 mA @ 3.6 V and 85°C (max.) 3.0–3.6 V DC, 200 (typ.) mA @ 3.3 V,
225 mA @ 3.6 V and 85°C (max.)
Operating Temperature -40°C to +85°C
Humidity 5% to 95%, noncondensing
Connectors One 2 × 25, 1.27 mm pitch IDC signal header
One 2 × 5, 1.27 mm pitch IDC programming header
Board Size 1.84" × 2.42" × 0.84"
(47 mm × 61 mm × 21 mm)
Table A-1. RCM4200 Specifications (continued)
Parameter RCM4200 RCM4210
92 RabbitCore RCM4200
A.1.1 A/D Converter
Table A-2 shows some of the important A/D converter specifications. For more details,
refer to the ADC7870 data sheet.
Table A-2. A/D Converter Specifications
Parameter Test Conditions Typ Max
Analog Input Characteristics
Input Capacitance
Input Impedance
Common-Mode
Differential Mode
4 – 9.7 pF
6 M
7 M
Static Accuracy
Resolution
Single-Ended Mode
Differential Mode
Integral Linearity
Differential Linearity
11 bits
12 bits
±1 LSB
±0.5 LSB
±2.5 LSB
Dynamic Characteristics
Throughput Rate 52 ksamples/s
Voltage Reference
Accuracy
Buffer Amp Source Current
Buffer Amp Sink Current
Short-Circuit Current
Vref = 2.048 V and 2.5 V ±0.05%
20 mA
200 µA
20 mA
±0.25%
<7 fi.="" ‘="" j="" “="" +h‘="" figure="" a-3.="" user="" board="" footprint="" iar="" rcm4200="" user's="" manual="" 93="">
Users Manual 93
A.1.2 Headers
The RCM4200 uses a header at J2 for physical connection to other boards. J2 is a 2 × 25
SMT header with a 1.27 mm pin spacing. J1, the programming port, is a 2 × 5 header with
a 1.27 mm pin spacing.
Figure A-3 shows the layout of another board for the RCM4200 to be plugged into. These
reference design values are relative to one of the mounting holes.
Figure A-3. User Board Footprint for RCM4200
J2
RCM4200 Series
Footprint
J1
0.050
(1.27)
0.875
(22.2)
0.016
(0.4) sq.
0.284
(7.2)
0.334
(8.5)
0.72
(18) 0.62
(16)
0.91
(23)
0.19
(5)
94 RabbitCore RCM4200
A.2 Rabbit 4000 DC Characteristics
Stresses beyond those listed in Table A-3 may cause permanent damage. The ratings are
stress ratings only, and functional operation of the Rabbit 4000 chip at these or any other
conditions beyond those indicated in this section is not implied. Exposure to the absolute
maximum rating conditions for extended periods may affect the reliability of the Rabbit
4000 chip.
Table A-4 outlines the DC characteristics for the Rabbit 4000 at 3.3 V over the recom-
mended operating temperature range from TA = –40°C to +85°C, VDDIO = 3.0 V to 3.6 V.
Table A-3. Rabbit 4000 Absolute Maximum Ratings
Symbol Parameter Maximum Rating
TAOperating Temperature -40° to +85°C
TSStorage Temperature -55° to +125°C
VIH Maximum Input Voltage VDDIO + 0.3 V
(max. 3.6 V)
VDDIO Maximum Operating Voltage 3.6 V
Table A-4. 3.3 Volt DC Characteristics
Symbol Parameter Min Typ Max
VDDIO
I/O Ring Supply Voltage, 3.3 V 3.0 V 3.3 V 3.6 V
I/O Ring Supply Voltage, 1.8 V 1.65 V 1.8 V 1.90 V
VIH High-Level Input Voltage
(VDDIO = 3.3 V) 2.0 V
VIL Low-Level Input Voltage
(VDDIO = 3.3 V) 0.8 V
VOH High-Level Output Voltage
(VDDIO = 3.3 V) 2.4 V
VOL Low-Level Output Voltage
(VDDIO = 3.3 V) 0.4 V
IIO I/O Ring Current @ 29.4912 MHz,
3.3 V, 25°C 12.2 mA
IDRIVE All other I/O
(except TXD+, TXDD+, TXD-, TXDD-) 8 mA
User’s Manual 95
A.3 I/O Buffer Sourcing and Sinking Limit
Unless otherwise specified, the Rabbit I/O buffers are capable of sourcing and sinking
8 mA of current per pin at full AC switching speed. Full AC switching assumes a
29.4 MHz CPU clock with the clock doubler enabled and capacitive loading on address
and data lines of less than 70 pF per pin. The absolute maximum operating voltage on all
I/O is 3.6 V.
A.4 Bus Loading
You must pay careful attention to bus loading when designing an interface to the
RCM4200. This section provides bus loading information for external devices.
Table A-5 lists the capacitance for the various RCM4200 I/O ports.
Table A-6 lists the external capacitive bus loading for the various RCM4200 output ports.
Be sure to add the loads for the devices you are using in your custom system and verify
that they do not exceed the values in Table A-6.
Table A-7 lists the loadings for the A/D converter inputs.
Table A-5. Capacitance of Rabbit 4000 I/O Ports
I/O Ports Input
Capacitance
(pF)
Output
Capacitance
(pF)
Parallel Ports A to E 12 14
Table A-6. External Capacitive Bus Loading -40°C to +85°C
Output Port Clock Speed
(MHz) Maximum External
Capacitive Loading (pF)
All I/O lines with clock
doubler enabled 58.98 100
Table A-7. A/D Converter Inputs
Parameter Value
Input Capacitance 4–9.7 pF
Input Impedance Common-Mode 6 M
Differential 7 M
+ F 4% +4 FAR
96 RabbitCore RCM4200
Figure A-4 shows a typical timing diagram for the Rabbit 4000 microprocessor external
I/O read and write cycles.
Figure A-4. External I/O Read and Write Cycles—No Extra Wait States
NOTE: /IOCSx can be programmed to be active low (default) or active high.
Tadr
Tadr
External I/O Read (no extra wait states)
CLK
A[15:0]
External I/O Write (no extra wait states)
CLK
A[15:0]
/IORD
valid
T1 Tw
T1 Tw T2
valid
T2
/BUFEN
/IOCSx
/IOWR
/BUFEN
D[7:0] valid
Tsetup
Thold
/CSx
/IOCSx
TCSx
TIOCSx
TIORD
TBUFEN
TCSx
TIOCSx
TIORD
TBUFEN
valid
D[7:0]
/CSx
TCSx
TIOCSx
TIOWR
TCSx
TIOCSx
TIOWR
TBUFEN TBUFEN
TDHZV TDVHZ
User’s Manual 97
Table A-8 lists the delays in gross memory access time for several values of VDDIO.
The measurements are taken at the 50% points under the following conditions.
T = -40°C to 85°C, V = VDDIO ±10%
Internal clock to nonloaded CLK pin delay 1 ns @ 85°C/3.0 V
The clock to address output delays are similar, and apply to the following delays.
Tadr, the clock to address delay
TCSx, the clock to memory chip select delay
TIOCSx, the clock to I/O chip select delay
TIORD, the clock to I/O read strobe delay
TIOWR, the clock to I/O write strobe delay
TBUFEN, the clock to I/O buffer enable delay
The data setup time delays are similar for both Tsetup and Thold.
When the spectrum spreader is enabled with the clock doubler, every other clock cycle is
shortened (sometimes lengthened) by a maximum amount given in the table above. The
shortening takes place by shortening the high part of the clock. If the doubler is not
enabled, then every clock is shortened during the low part of the clock period. The maxi-
mum shortening for a pair of clocks combined is shown in the table.
Technical Note TN227, Interfacing External I/O with Rabbit Microprocessor Designs,
contains suggestions for interfacing I/O devices to the Rabbit 4000 microprocessors.
Table A-8. Preliminary Data and Clock Delays
VDDIO
(V)
Clock to Address
Output Delay
(ns) Data Setup
Time Delay
(ns)
Worst-Case
Spectrum Spreader Delay
(ns)
30 pF 60 pF 90 pF 0.5 ns setting
no dbl / dbl 1 ns setting
no dbl / dbl 2 ns setting
no dbl / dbl
3.3 6 8 11 1 2.3 / 2.3 3 / 4.5 4.5 / 9
1.8 18 24 33 3 7 / 6.5 8 / 12 11 / 22
A.5 Conformal Coating The areas around the 32 kHz realitime clock crystal oscillator have siliconeibased 172620 conformal coating applied. The conformally c in Figure A75. The conformal coating protects these highiimpedanc effects of moisture and contaminants over time. Conformally coated area Figure A-5. RCM4200 Areas Receiving Conformal Coating Any components in the confonnally coated area may be replaced using standard soldering procedures for surfaceimounted components. A new conformal coating should then be applied to offer continuing protection against the effects of moisture and contaminants. NOTE: For more information on conformal coatings, refer to Technical Note 303, Can- formal Coatings. 98
98 RabbitCore RCM4200
A.5 Conformal Coating
The areas around the 32 kHz real-time clock crystal oscillator have had the Dow Corning
silicone-based 1-2620 conformal coating applied. The conformally coated area is shown
in Figure A-5. The conformal coating protects these high-impedance circuits from the
effects of moisture and contaminants over time.
Figure A-5. RCM4200 Areas Receiving Conformal Coating
Any components in the conformally coated area may be replaced using standard soldering
procedures for surface-mounted components. A new conformal coating should then be
applied to offer continuing protection against the effects of moisture and contaminants.
NOTE: For more information on conformal coatings, refer to Technical Note 303, Con-
formal Coatings.
Conformally coated
area
C43
L2
3
41
Y3
C82
R5 R2
J1
C76
R3
R51
R31
R20
C81
C58
C67
C88
J3
JP11
JP10
JP12
JP1
JP2
JP9
JP6
JP7
JP3
JP5
JP4
C3
C2
C17
C16
R6
R8
R46
R45
R43
R44
R39
R42
U1
R7
C1
C86
L1
C74
U15
C75
R40
R41
JP14
JP15
JP13
U14
C85
C78
L7
C72
C65
C87
C57 U13
R34
R35
R33
R32
Q3
C77
C5
Y4
R14
R12
U4
C24 JP16R13
DS1
LINK
SPEED
FDX
DS2
DS3
R47
R48
R49
C33
C32
C31
R50
C26
R52 C25
C19
R4 C20 C18
U3
Q1
C7
R36
R29
C8
C9 C10
C6
C11 C12
JP8
C15 R27
R11
R16
Y2
U2
R9
C13
C14
C39
U5
C27
C21 R1 R10
D1
R22
C28
C29
C36
C37
C38
C30
C34
C35
R18
U7
U6
R21
R19
R15
C23
R23
E 5 Figure A-fi. Location a! RCM4200 Configura Table A79 lists the configuration options. Table A-9. RCM4200 Jumper Config Header Descripiion Pins Con 172 LNO JP1 LNO or PDO on 12 pin 40 273 PDO 172 LN2 1P2 LNZ or PDZ on 12 pin 42 273 PD2 172 LN6 JP3 LN6 or PD6 on 12 pin 46 273 PD6 172 LN7 1P4 LN7 or PD7 on 12 pin 47 273 PD7 172 LNS 1P5 LNS or PDS on 12 pin 45 273 PDS 172 LN4 JPfi LN4 or PD4 on 12 pin 44 273 Pm User's Manual
Users Manual 99
A.6 Jumper Configurations
Figure A-6 shows the header locations used to configure the various RCM4200 options
via jumpers.
Figure A-6. Location of RCM4200 Configurable Positions
Table A-9 lists the configuration options.
Table A-9. RCM4200 Jumper Configurations
Header Description Pins Connected Factory
Default
JP1 LN0 or PD0 on J2 pin 40 1–2 LN0 RCM4200
2–3 PD0 RCM4210
JP2 LN2 or PD2 on J2 pin 42 1–2 LN2 RCM4200
2–3 PD2 RCM4210
JP3 LN6 or PD6 on J2 pin 46 1–2 LN6 RCM4200
2–3 PD6 RCM4210
JP4 LN7 or PD7 on J2 pin 47 1–2 LN7 RCM4200
2–3 PD7 RCM4210
JP5 LN5 or PD5 on J2 pin 45 1–2 LN5 RCM4200
2–3 PD5 RCM4210
JP6 LN4 or PD4 on J2 pin 44 1–2 LN4 RCM4200
2–3 PD4 RCM4210
JP8
JP14
JP15
JP13
JP11
JP10
JP12
JP1
JP2
JP9
JP6
JP7
JP3
JP5
JP4
JP16
RCM4200
100 RabbitCore RCM4200
NOTE: The jumper connections are made using 0 surface-mounted resistors.
JP7 LN3 or PD3 on J2 pin 43 1–2 LN3 RCM4200
2–3 PD3 RCM4210
JP8 Data SRAM Size 1–2 512K ×
2–3 256K
JP9 LN1 or PD1 on J2 pin 41 1–2 LN1 RCM4200
2–3 PD1 RCM4210
JP10 PE5 or SMODE0 Output
on J2 pin 37
1–2 PE5 ×
2–3 SMODE0
JP11 PE6 or SMODE1 Output
on J2 pin 38
1–2 PE6 ×
2–3 SMODE1
JP12 PE7 or STATUS Output
on J2 pin 39
1–2 PE7 ×
2–3 STATUS
JP13 Clocked Synchronous or
Programmed I/O Access to
Serial Flash
1–2 RxC to Serial Flash ×
2–3 Programmed I/O to Serial Flash
JP14 Clocked Synchronous or
Programmed I/O Access to
Serial Flash
1–2 TxC to Serial Flash ×
2–3 Programmed I/O to Serial Flash
JP15 Clocked Synchronous or
Programmed I/O Access to
Serial Flash
1–2 SCLKC to Serial Flash ×
2–3 Programmed I/O to Serial Flash
JP16 LED DS3 Display
1–2 FDX/COL displayed by LED DS3 ×
2–3 optional ACT displayed by LED
DS3
Table A-9. RCM4200 Jumper Configurations (continued)
Header Description Pins Connected Factory
Default
User’s Manual 101
APPENDIX B. PROTOTYPING BOARD
Appendix B describes the features and accessories of the Proto-
typing Board, and explains the use of the Prototyping Board to
demonstrate the RCM4200 and to build prototypes of your own
circuits. The Prototyping Board has power-supply connections
and also provides some basic I/O peripherals (RS-232, LEDs,
and switches), as well as a prototyping area for more advanced
hardware development.
Curren BUD :oooooooooooooo 0000000000000 0000000000000 Omvwmwwmw @Wflgafi O c O Figure 3-1. Prototyping Board 102
102 RabbitCore RCM4200
B.1 Introduction
The Prototyping Board included in the Development Kit makes it easy to connect an
RCM4200 module to a power supply and a PC workstation for development. It also pro-
vides some basic I/O peripherals (RS-232, LEDs, and switches), as well as a prototyping
area for more advanced hardware development.
For the most basic level of evaluation and development, the Prototyping Board can be
used without modification.
As you progress to more sophisticated experimentation and hardware development,
modifications and additions can be made to the board without modifying the RCM4200
module.
The Prototyping Board is shown below in Figure B-1, with its main features identified.
Figure B-1. Prototyping Board
D1
R1
PWR
DS1
GND
J1
U1
C1
GND
C2
JP1
C3
D2
JP2
C4
+3.3 V
J2
R2
BT1
1
S1
RESET
RXD TXD
TXC RXC
GND
J4
UX29
RX81
RX87
CX41
RX83
RX11
CX39
UX30
UX10
UX12
UX14
UX16
RX79
CX29 CX17
RX67
UX45
RX85
GND
GND
GND
1
R24
R22
R21
R23
CX23 RX77
1
R27
R28
JP25
CX25
RX75
RX73 CX27
DS3
S3S2
DS2
J3
UX49 UX4
UX47
+5 V
GND
+3.3 V
RCM1
U2
/RST_OUT
/IOWR
VBAT
EXT
PA1
PA3
PA5
PA7
PB1
PB3
PB5
PB7
PC1
PC3
PC5
PC7
PE1
PE3
PE5
PE7
PD1
LN1
PD3
LN3
PD5
LN5
PD7
LN7
VREF
GND
/IORD
/RST_IN
PA0
PA2
PA4
PA6
PB0
PB2
PB4
PB6
PC0
PC2
PC4
PC6
PE0
PE2
PE4
PE6
PD0
LN0
PD2
LN2
PD4
LN4
PD6
LN6
CVT
AGND
JP24
JP23
C14
C12
C10
C8
C7
C9
C11
C13
R10
R8
R6
R4
R3
R5
R7
R20
R18
R16
R14
R13
R15
R17
R29
JP11
JP15
JP19
JP21
JP22
JP20
JP17
JP13
R19
R9
RX57
RX55
RX97
RX49
UX33UX31
RX89
UX3
UX37 UX42 UX41
RX63
RX65 RX61
RX59
R26
R25
Q1
C15
C19 C20
U3
C18
C17
JP16
JP6
JP5
JP12
JP4
JP3
JP14
JP8
JP7
JP18
JP9
JP10
C16
L1C6
C5
AGND
CVT
LN6IN
LN4IN
LN2IN
LN0IN
VREF
LN7IN
LN5IN
LN3IN
LN1IN
AGND
AGND
R11 R12
RX47
RX43
Power
LED
Reset
Switch
User
LEDs
+5 V, 3.3 V, and
GND Buses
RCM4200
Module
Extension Header
User
Switches
SMT Prototyping
Area
Current-
Measurement
Headers
Through-Hole
Prototyping Area
C53
Analog
I/O
Power
Input Backup
Battery
RS-232
Header
RCM4200
Module
Connector
SMT Prototyping
Area
RCM4200
Standoff
Mounting
User’s Manual 103
B.1.1 Prototyping Board Features
Power Connection—A a 3-pin header is provided for connection to the power supply.
Note that the 3-pin header is symmetrical, with both outer pins connected to ground and
the center pin connected to the raw V+ input. The cable of the AC adapter provided
with the North American version of the Development Kit is terminated with a header
plug that connects to the 3-pin header in either orientation. The header plug leading to
bare leads provided for overseas customers can be connected to the 3-pin header in
either orientation.
Users providing their own power supply should ensure that it delivers 8–24 V DC at
8 W. The voltage regulators will get warm while in use.
Regulated Power Supply—The raw DC voltage provided at the 3-pin header is
routed to a 5 V switching voltage regulator, then to a separate 3.3 V linear regulator.
The regulators provide stable power to the RCM4200 module and the Prototyping
Board.
Power LED—The power LED lights whenever power is connected to the Prototyping
Board.
Reset Switch—A momentary-contact, normally open switch is connected directly to the
RCM4200’s /RESET_IN pin. Pressing the switch forces a hardware reset of the system.
I/O Switches and LEDs—Two momentary-contact, normally open switches are con-
nected to the PB4 and PB5 pins of the RCM4200 module and may be read as inputs by
sample applications.
Two LEDs are connected to the PB2 and PB3 pins of the RCM4200 module, and may
be driven as output indicators by sample applications.
Prototyping Area—A generous prototyping area has been provided for the installation
of through-hole components. +3.3 V, +5 V, and Ground buses run around the edge of
this area. Several areas for surface-mount devices are also available. (Note that there
are SMT device pads on both top and bottom of the Prototyping Board.) Each SMT pad
is connected to a hole designed to accept a 30 AWG solid wire.
Module Extension Header—The complete pin set of the RCM4200 module is
duplicated at header J2. Developers can solder wires directly into the appropriate holes,
or, for more flexible development, a 2 × 25 header strip with a 0.1" pitch can be sol-
dered into place. See Figure B-4 for the header pinouts.
NOTE: The same Prototyping Board can be used for several series of RabbitCore mod-
ules, and so the signals at J2 depend on the signals available on the specific RabbitCore
module.
Analog Inputs Header—The Prototyping Board’s analog signals are presented at
header J3. These analog signals are connected via attenuator/filter circuits on the Proto-
typing Board to the corresponding analog inputs on the RCM4200 module. Developers
can solder wires directly into the appropriate holes, or, for more flexible development, a
2 × 7 header strip with a 0.1" pitch can be soldered into place. See Figure B-4 for the
header pinouts.
104 RabbitCore RCM4200
RS-232—Two 3-wire or one 5-wire RS-232 serial ports are available on the Prototyp-
ing Board at header J4. A 10-pin 0.1" pitch header strip installed at J4 allows you to
connect a ribbon cable that leads to a standard DE-9 serial connector.
Current Measurement Option—You may cut the trace below header JP1 on the
bottom side of the Prototyping Board and install a 1 × 2 header strip from the Develop-
ment Kit to allow you to use an ammeter across the pins to measure the current drawn
from the +5 V supply. Similarly, you may cut the trace below header JP2 on the bottom
side of the Prototyping Board and install a 1 × 2 header strip from the Development Kit
to allow you to use an ammeter across the pins to measure the current drawn from the
+3.3 V supply.
Backup Battery—A 2032 lithium-ion battery rated at 3.0 V, 220 mA·h, provides
battery backup for the RCM4200 SRAM and real-time clock.
3.2 Mechanical Dimensions and Layo Figure B72 shows the mechanical dimensions and layout :3 C] 000000000. :3 Q U (£00 I; 00 00 DO ’ 80000000000000000. 0 O Figure 5-2. Prototyping Board Dimensions User's Manual 105
Users Manual 105
B.2 Mechanical Dimensions and Layout
Figure B-2 shows the mechanical dimensions and layout for the Prototyping Board.
Figure B-2. Prototyping Board Dimensions
D1
R1
PWR
DS1
GND
J1
U1
C1
GND
C2
JP1
C3
D2
JP2
C4
+3.3 V
J2
R2
BT1
1
S1
RESET
RXD TXD
TXC RXC
GND
J4
UX29
RX81
RX87
CX41
RX83
RX11
CX39
UX30
UX10
UX12
UX14
UX16
RX79
CX29 CX17
RX67
UX45
RX85
GND
GND
GND
1
R24
R22
R21
R23
CX23 RX77
1
R27
R28
JP25
CX25
RX75
RX73 CX27
DS3
S3S2
DS2
J3
UX49 UX4
UX47
+5 V
GND
+3.3 V
RCM1
U2
/RST_OUT
/IOWR
VBAT
EXT
PA1
PA3
PA5
PA7
PB1
PB3
PB5
PB7
PC1
PC3
PC5
PC7
PE1
PE3
PE5
PE7
PD1
LN1
PD3
LN3
PD5
LN5
PD7
LN7
VREF
GND
/IORD
/RST_IN
PA0
PA2
PA4
PA6
PB0
PB2
PB4
PB6
PC0
PC2
PC4
PC6
PE0
PE2
PE4
PE6
PD0
LN0
PD2
LN2
PD4
LN4
PD6
LN6
CVT
AGND
JP24
JP23
C14
C12
C10
C8
C7
C9
C11
C13
R10
R8
R6
R4
R3
R5
R7
R20
R18
R16
R14
R13
R15
R17
R29
JP11
JP15
JP19
JP21
JP22
JP20
JP17
JP13
R19
R9
RX57
RX55
RX97
RX49
UX33UX31
RX89
UX3
UX37 UX42 UX41
RX63
RX65 RX61
RX59
R26
R25
Q1
C15
C19 C20
U3
C18
C17
JP16
JP6
JP5
JP12
JP4
JP3
JP14
JP8
JP7
JP18
JP9
JP10
C16
L1C6
C5
AGND
CVT
LN6IN
LN4IN
LN2IN
LN0IN
VREF
LN7IN
LN5IN
LN3IN
LN1IN
AGND
AGND
R11 R12
RX47
RX43
0.24
(6)
3.80
(97)
0.15
(3.8)
0.15
(3.8)
3.485
(88.5)
0.165
(4.2)
0.15
(3.8)
0.15
(3.8)
3.80
(97)
0.19
(4.8)
0.36
(9.1)
3.10
(78.8)
2.735
(69.5)
1.935
(49.1)
the electrical, mechanical, and environmental specification Table B-1. Prototyping Board Specifications arameter Specification 3.30" x 3.80" x 0.48" (97 mm x 97 mm x 12 mm) mperature 0"C to +70"C 5% to 95%, noncondensing x V to 24 V DC rrent Draw 300 mA max. for +3.3 V supply. padded ctrcuits) l A tolal +3.3 V and +5 V combined {BEA 1.3" x 2 0" (33 mm x 50 mm) Ihroughhole, 0 1" Sp additional space for SMT components One 2 x 25 header socket, 1.27 mm pitch, to accep One 1 x 3 [DC header for powerrsupply connection One 2 x 5113c R5232 header, 0 1" pitch Two Imsluffed header locations for analog and RCM 25 unsrutted 27pm header locations for optional co r Supply The RCM4200 requires a regulated 3.0 V 7 3.6 V DC power source to opc of current required by the application, different regulators age. Prototyping Board has an onboard +5 V switching power regulator fr regulator draws its supply. Thus both +5 V and +3.3 V are ard. The Prototyping Board itself is protected against reverse polarity by a Sho gurc Be3. LINEAR REG 33 M ‘ LM1117 g; Tl ”.2 Dem U2 3 m 2 E E a mum lcs ‘ry ice 0: ‘ i 7 14va 33:1“ IGlUuF «curl J: I . 7 LM2575 JD. 7 T T J; 1 $5140 Figure 3-3. Prototyping Board Power Supply 106 RabbilCore RC
106 RabbitCore RCM4200
Table B-1 lists the electrical, mechanical, and environmental specifications for the Proto-
typing Board.
B.3 Power Supply
The RCM4200 requires a regulated 3.0 V – 3.6 V DC power source to operate. Depending
on the amount of current required by the application, different regulators can be used to
supply this voltage.
The Prototyping Board has an onboard +5 V switching power regulator from which a
+3.3 V linear regulator draws its supply. Thus both +5 V and +3.3 V are available on the
Prototyping Board.
The Prototyping Board itself is protected against reverse polarity by a Shottky diode at D2
as shown in Figure B-3.
Figure B-3. Prototyping Board Power Supply
Table B-1. Prototyping Board Specifications
Parameter Specification
Board Size 3.80" × 3.80" × 0.48" (97 mm × 97 mm × 12 mm)
Operating Temperature 0°C to +70°C
Humidity 5% to 95%, noncondensing
Input Voltage 8 V to 24 V DC
Maximum Current Draw
(including user-added circuits) 800 mA max. for +3.3 V supply,
1 A total +3.3 V and +5 V combined
Prototyping Area 1.3" × 2.0" (33 mm × 50 mm) throughhole, 0.1" spacing,
additional space for SMT components
Connectors
One 2 × 25 header socket, 1.27 mm pitch, to accept RCM4200
One 1 × 3 IDC header for power-supply connection
One 2 × 5 IDC RS-232 header, 0.1" pitch
Two unstuffed header locations for analog and RCM4200 signals
25 unstuffed 2-pin header locations for optional configurations
LINEAR POWER
REGULATOR
POWER
IN
J1
10 µF
LM1117
U1
+3.3 V
3
1
2
1
2
3DL4003
D2
47 µF 330 µF
+5 V
L1
C5
330 µH
D1
B140
SWITCHING POWER REGULATOR
DCIN
U2
LM2575
C6 C2
10 µF
C4
JP1 JP2
m) RxD END RCM420I7 Signals Figure 5-4. Prototyping Board Pinout The analog signals are brought out to labeled points at header local Board. Although header 13 is unstuffed, a 2 X 7 header can be add signals are only available from [he RCM4200 included in the Dev RCM4210 model does not have an AID converter. User's Manual
Users Manual 107
B.4 Using the Prototyping Board
The Prototyping Board is actually both a demonstration board and a prototyping board. As
a demonstration board, it can be used to demonstrate the functionality of the
RCM4200
right out of the box without any modifications to either board.
The Prototyping Board comes with the basic components necessary to demonstrate the
operation of the RCM4200. Two LEDs (DS2 and DS3) are connected to PB2 and PB3,
and two switches (S2 and S3) are connected to PB4 and PB5 to demonstrate the interface
to the Rabbit 4000 microprocessor. Reset switch S1 is the hardware reset for the RCM4200.
The
Protot