Ubuntu 22.04 mraa

justinGE

Hello,

I'm having issues trying to get GPIO functionality on Ubuntu 22.04 working. I installed the pinctrl package and built & installed mraa from source, but running mraa-gpio list gives me "no pins". The mraa examples also seem to error out not being able to find pins. Any solutions?

bbokser_bdai

bumping.

bbokser_bdai

In the past, I believe the correct way to do this was to use the UP fork of mraa. However, I just tried this with sudo add-apt-repository ppa:up-division/mraa and was notified that there is no Jammy release file for it. Which makes it sound like Ubuntu 22.04 isn't being supported?

justinGE

I tried building the up version of mraa for 22.04 and still can't detect pins. Is there an alternative to using mraa on 22.04 for pin/spi control?

garyw

@justinGE
install UP HAT pinctrl-upboard driver
https://github.com/up-division/pinctrl-upboard

build and install mraa from up-rpi branch
https://github.com/up-division/mraa/tree/up-rpi

GPIO mapping is the same in all upboards with new pinctrl-upboard driver, you can refer our wiki for GPIO number
https://github.com/up-board/up-community/wiki/40Pin-Header

justinGE

That worked, thanks! There is one more issue though. The board will now hang on shutdown/reboot after installing the up-extra package to enable user-space GPIO access.

garyw

@justinGE
could you take a screenshot to see if there any information to know hang in where?