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This page will show you step-by-step how to interface a FLIR Lepton module to the BeagleBone Black/Green.
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Today the latest version is: 2018-10-07 (these are just monthly snapshots, so always check for the latest)
IOT Image: (BeagleBone Black/Green eMMC) wget https://rcn-ee.net/rootfs/bb.org/testing/2018-10-07/stretch-iot/BBB-blank-debian-9.5-iot-armhf-2018-10-07-4gb.img.xz sha256sum: dcd36dcd330d2c6959f86ed13ce88c79515052dcd5c184dd75b0f19ec6c2be02 |
Insert microSD into pc adapter and check device node name (in our case /dev/sdd):
voodoo@hades:~$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sde 8:64 1 3.7G 0 disk └─sde1 8:65 1 3.3G 0 part sda 8:0 0 465.8G 0 disk └─sda1 8:1 0 465.8G 0 part / |
Download the *.img.xz and write to microSD card via etcher.io:
voodoo@hades:~$ wget https://rcn-ee.net/rootfs/bb.org/testing/2018-10-07/stretch-iot/BBB-blank-debian-9.5-iot-armhf-2018-10-07-4gb.img.xz voodoo@hades:~$ sudo /opt/etcher-cli/etcher -d /dev/sdf BBB-blank-debian-9.5-iot-armhf-2018-10-07-4gb.img.xz ? This will erase the selected drive. Are you sure? Yes Flashing: 17.08 MB/s [========================] 100% eta 0s Validating: 0 B/s [========================] 100% eta 0s Checksums: - /dev/sdf: d3aae7d1a808c4826f1e0b45d6d1bac3876ea55cacbb38225d5428d27f4e990ec25ad3e85bd503212a63da2e3fceda7cb666cb4977a02dbd94caf676c1d88cfd |
Insert microSD into BeagleBone Black/Green and wait for flashing procedure to finish. (device should shutdown)
Since we will be using an LCD, we will be losing access to the J1 serial debug header on the baseboard, you can use the pre-loaded g_serial module via: (note, no boot logs will be shown)
gtkterm -p /dev/ttyACM0 -s 115200 & |
For this project we are going to use openbox & slim to provide a very basic desktop environment on the LCD.
sudo apt update ; \ sudo apt upgrade ; \ sudo apt install openbox slim xinit xserver-xorg-video-fbdev x11-xserver-utils git libpam-gnome-keyring feh i2c-tools unclutter |
Setup /etc/X11/xorg.conf
Section "Monitor"
Identifier "Builtin Default Monitor"
EndSection
Section "Device"
Identifier "Builtin Default fbdev Device 0"
Driver "fbdev"
EndSection
Section "Screen"
Identifier "Builtin Default fbdev Screen 0"
Device "Builtin Default fbdev Device 0"
Monitor "Builtin Default Monitor"
EndSection
Section "ServerLayout"
Identifier "Builtin Default Layout"
Screen "Builtin Default fbdev Screen 0"
EndSection |
Check bootloader version
debian@beaglebone:~$ sudo /opt/scripts/tools/version.sh | grep bootloader bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot 2018.03-00002-gac9cce7c6a]:[location: dd MBR] |
Update Kernel:
debian@beaglebone:~$ cd /opt/scripts/tools/ debian@beaglebone:/opt/scripts/tools$ sudo ./update_kernel.sh --lts-4_14 |
Install device tree overlays source for LCD4/LCD7
git clone https://github.com/beagleboard/bb.org-overlays --depth=1 cd ./bb.org-overlays ./dtc-overlay.sh ./install.sh |
Shutdown system via:
sudo systemctl poweroff |
Install LCD4/LCD7 and powerup BeagleBone Black/Green
Set Default User:
# default user, leave blank or remove this line # for avoid pre-loading the username. #default_user simone default_user debian |
Enable auto-login
# Automatically login the default user (without entering # the password. Set to "yes" to enable this feature #auto_login no auto_login yes |
Enable openbox:
echo "exec openbox-session" > /home/debian/.xsession |
Build/Install Lepton application
sudo apt install build-essential qt4-dev-tools git clone https://github.com/groupgets/LeptonModule |
Apply this patch, to push the application to the upper left:
diff --git a/software/beagleboneblack_video/main.cpp b/software/beagleboneblack_video/main.cpp index 264b0a2..f31c467 100644 --- a/software/beagleboneblack_video/main.cpp +++ b/software/beagleboneblack_video/main.cpp @@ -18,7 +18,7 @@ int main( int argc, char **argv ) QApplication a( argc, argv ); QWidget *myWidget = new QWidget; - myWidget->setGeometry(400, 300, 340, 290); + myWidget->setGeometry(20, 20, 340, 290); //create an image placeholder for myLabel //fill the top left corner with red, just bcuz |
and finally build the project
cd /home/debian/LeptonModule/software/beagleboneblack_video/leptonSDKEmb32PUB/ make cd .. qmake && make |
AutoStart this application on bootup:
mkdir -p /home/debian/.config/openbox/ echo "feh --bg-scale /opt/scripts/images/beaglebg.jpg" > /home/debian/.config/openbox/autostart echo "/home/debian/LeptonModule/software/beagleboneblack_video/bbb &" >> /home/debian/.config/openbox/autostart |
Increase LCD brightness
echo "echo 100 >> /sys/devices/platform/backlight/backlight/backlight/brightness" >> /opt/scripts/boot/am335x_evm.sh |
Enable the "BB_SPIDEV0" overlay in /boot/uEnv.txt:
uboot_overlay_addr4=/lib/firmware/BB-SPIDEV0-00A0.dtbo |
We need P9.30 for SPIDEV1, which is the enter key on the LCD7, so disable P9.30 in BB-BONE-LCD7-01-00A3.dts
diff --git a/src/arm/BB-BONE-LCD7-01-00A3.dts b/src/arm/BB-BONE-LCD7-01-00A3.dts
index a1c7833..4fdfc2d 100644
--- a/src/arm/BB-BONE-LCD7-01-00A3.dts
+++ b/src/arm/BB-BONE-LCD7-01-00A3.dts
@@ -48,7 +48,6 @@
"P9.15", /* keys: gpio1_16 LEFT */
"P9.23", /* keys: gpio1_17 RIGHT */
"P9.16", /* keys: gpio1_19 UP */
- "P9.30", /* keys: gpio3_16 DOWN */
"P9.21", /* keys: gpio0_3 ENTER */
"ehrpwm1a",
@@ -57,7 +56,6 @@
"gpio1_16", /* LEFT */
"gpio1_17", /* RIGHT */
"gpio1_19", /* UP */
- "gpio3_16", /* DOWN */
"gpio0_3", /* ENTER */
"lcdc",
"tscadc";
@@ -111,7 +109,6 @@
BONE_P9_15 (PIN_INPUT | MUX_MODE7) /* gpmc_a0.gpio1_16 */
BONE_P9_23 (PIN_INPUT | MUX_MODE7) /* gpmc_a1.gpio1_17 */
BONE_P9_16 (PIN_INPUT | MUX_MODE7) /* gpmc_a3.gpio1_19 */
- BONE_P9_30 (PIN_INPUT | MUX_MODE7) /* mcasp0_axr0.gpio3_16 */
BONE_P9_21 (PIN_INPUT | MUX_MODE7) /* spi0_d0.gpio0_3 */
>;
};
@@ -222,14 +219,6 @@
};
button@4 {
debounce_interval = <50>;
- linux,code = <108>;
- label = "down";
- gpios = <&gpio3 16 0x1>;
- gpio-key,wakeup;
- autorepeat;
- };
- button@5 {
- debounce_interval = <50>;
linux,code = <28>;
label = "enter";
gpios = <&gpio0 3 0x1>; |
Then rebuild:
cd ./bb.org-overlays make clean ./install.sh |
Enable the "BB_SPIDEV1" overlay in /boot/uEnv.txt:
uboot_overlay_addr4=/lib/firmware/BB-SPIDEV1-00A0.dtbo |
