Works on:
- rpi2b
- rpi3b
- rockpi4c+
Doesn not work on a rpi4b (bug in the RPI USB stack).
Raspberry PI has removed the COMEDI framework from the standard kernel. In order to use COMEDI devices you need to compile and install comedi.
Only the drivers for COMEDI USB devices are compiled in particular USB-DUX:
sudo apt install raspberrypi-kernel-headers
make -C /usr/src/linux-headers-5.15.84-v8+/ M=$PWD
The above kernel header directory in /usr/src might differ depending if it's 64bit or 32bit.
Please check with ls -l /usr/src.
sudo make -C /usr/src/linux-headers-5.15.84-v8+/ M=$PWD modules_install
sudo depmod -a
sudo apt install firmware-linux-free
Edit /etc/group and add yourself to the group iocard.
Check with
sudo dmesg
if you see:
[ 3506.038554] comedi: version 0.7.76 - http://www.comedi.org
[ 3506.065482] comedi comedi0: ADC_zero = 80011c
[ 3506.066796] comedi comedi0: driver 'usbduxsigma' has successfully auto-configured 'usbduxsigma'.
[ 3506.066849] usbcore: registered new interface driver usbduxsigma
If you get an error message then the firmware is most likely not installed. Make sure you install it with:
sudo apt install firmware-linux-free
If there is no firmware package copy the firmware usbduxsigam_firmware.bin from this repo it to /lib/firmware.