Enable PWM for illumination LEDs on LL2 and LL3

Author: thatcomputerguy0101

install_limelight.sh

@@ -23,6 +23,10 @@ chmod +x ./install.sh
 install -m 644 limelight/config.txt /boot/firmware/
 install -m 644 userconf.txt /boot/firmware/
 
+# link old config.txt location for diozero compatibility
+# TODO(thatcomputerguy0101): Remove this when diozero checks the new location
+ln -s /boot/firmware/config.txt /boot/config.txt
+
 # install LL DTS
 dtc -O dtb limelight/gloworm-dt.dts -o /boot/firmware/dt-blob.bin
 

install_limelight3.sh

@@ -12,6 +12,13 @@ mkdir --parent /boot/firmware
 mount "${loopdev}p1" /boot/firmware
 ls -la /boot/firmware
 
+# edit boot partition
+install -m 644 limelight/config.txt /boot/firmware/
+
+# link old config.txt location for diozero compatibility
+# TODO(thatcomputerguy0101): Remove this when diozero checks the new location
+ln -sf /boot/firmware/config.txt /boot/config.txt
+
 # Add the one extra file for the LL3
 wget https://datasheets.raspberrypi.org/cmio/dt-blob-cam1.bin -O /boot/firmware/dt-blob.bin
 

limelight/config.txt

@@ -26,6 +26,9 @@ dtoverlay=vc4-kms-v3d
 dtparam=spi=on
 dtparam=audio=off
 
+# Enable hardware PWM for LED control
+dtoverlay=pwm-2chan,pin=18,func=2,pin2=13,func2=4
+
 max_framebuffers=2
 
 # Run in 64-bit mode