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?

frosst2906

Hello,
A new UP-user here. Thank you for your instructions.

I tried setting up the driver and use "up-rpi" branch for building. Although I get the list of pins (not all), I am still not able to exrecise control over the GPIOs. I tried with both mraa-gpio set <pin> out mraa-gpio setraw <pin> 1

This is the output I get from the terminal
Could not initialize gpio 13

mraa-gpio list <br> 00 ID_SD: GPIO I2C 01 ID_SC: GPIO I2C 02 I2C_SDA: GPIO I2C 03 I2C_SCL: GPIO I2C 04 ADC0: GPIO AIO 05 GPIO5: GPIO 06 GPIO6: GPIO 07 SPI_CS1: GPIO SPI 08 SPI_CS0: GPIO SPI 09 SPI_MISO: GPIO SPI 10 SPI_MOSI: GPIO SPI 11 SPI_CLK: GPIO SPI 12 PWM0: GPIO PWM 13 PWM1: GPIO PWM 14 UART_TX: GPIO UART 15 UART_RX: GPIO UART 16 UART_CTS: GPIO UART 17 UART_RTS: GPIO UART 18 I2S_CLK: GPIO 19 I2S_FRM: GPIO 20 I2S_DIN: GPIO 21 I2S_DOUT: GPIO 22 GPIO22: GPIO I2C 23 GPIO23: GPIO 24 GPIO24: GPIO 25 GPIO25: GPIO 26 GPIO26: GPIO 27 GPIO27: GPIO

mraa-gpio set 13 out Could not initialize gpio 13

as this throwed a permission issue (even after adding gpio group to sudo, I tried running it as root.

'sudo mraa-gpio set 13 out
Could not initialize gpio 13'

-- corresponding syslog

libmraa version v2.1.0-24-gf0f62c4 initialised by user 'bmterra' with EUID 1000 Aug 09 08:22:38 frosst2906 libmraa[22898]: UP Xtreme: Platform failed to find I2C0 controller Aug 09 08:22:38 frosst2906 libmraa[22898]: UP Xtreme: Platform failed to find I2C0 controller Aug 09 08:22:38 frosst2906 libmraa[22898]: UP Xtreme: Platform failed to find I2C1 controller Aug 09 08:22:38 frosst2906 libmraa[22898]: UP Xtreme: Platform failed to find I2C1 controller Aug 09 08:22:38 frosst2906 libmraa[22898]: Adding i2c bus found on i2c-3 on adapter i2c_designware.4 Aug 09 08:22:38 frosst2906 libmraa[22898]: Adding i2c bus found on i2c-5 on adapter i2c_designware.6 Aug 09 08:22:38 frosst2906 libmraa[22898]: Adding i2c bus found on i2c-2 on adapter i2c_designware.3 Aug 09 08:22:38 frosst2906 libmraa[22898]: up: Failed to find pin name I2C2_SDA Aug 09 08:22:38 frosst2906 libmraa[22898]: up: Failed to find pin name I2C2_SCL Aug 09 08:22:38 frosst2906 libmraa[22898]: up boards: kernel pinctrl driver available Aug 09 08:22:38 frosst2906 libmraa[22898]: Checking additional Platform support for LEC-AL iPI Aug 09 08:22:38 frosst2906 libmraa[22898]: gpio: platform doesn't support chardev, falling back to sysfs Aug 09 08:22:38 frosst2906 libmraa[22898]: libmraa initialised for platform 'UP' of type 12 Aug 09 08:23:22 frosst2906 libmraa[22992]: libmraa version v2.1.0-24-gf0f62c4 initialised by user 'bmterra' with EUID 1000 Aug 09 08:23:22 frosst2906 libmraa[22992]: UP Xtreme: Platform failed to find I2C0 controller Aug 09 08:23:22 frosst2906 libmraa[22992]: UP Xtreme: Platform failed to find I2C0 controller Aug 09 08:23:22 frosst2906 libmraa[22992]: UP Xtreme: Platform failed to find I2C1 controller Aug 09 08:23:22 frosst2906 libmraa[22992]: UP Xtreme: Platform failed to find I2C1 controller Aug 09 08:23:22 frosst2906 libmraa[22992]: Adding i2c bus found on i2c-3 on adapter i2c_designware.4 Aug 09 08:23:22 frosst2906 libmraa[22992]: Adding i2c bus found on i2c-5 on adapter i2c_designware.6 Aug 09 08:23:22 frosst2906 libmraa[22992]: Adding i2c bus found on i2c-2 on adapter i2c_designware.3 Aug 09 08:23:22 frosst2906 libmraa[22992]: up: Failed to find pin name I2C2_SDA Aug 09 08:23:22 frosst2906 libmraa[22992]: up: Failed to find pin name I2C2_SCL Aug 09 08:23:22 frosst2906 libmraa[22992]: up boards: kernel pinctrl driver available Aug 09 08:23:22 frosst2906 libmraa[22992]: Checking additional Platform support for LEC-AL iPI Aug 09 08:23:22 frosst2906 libmraa[22992]: gpio: platform doesn't support chardev, falling back to sysfs Aug 09 08:23:22 frosst2906 libmraa[22992]: libmraa initialised for platform 'UP' of type 12 Aug 09 08:23:22 frosst2906 libmraa[22992]: gpio13: init: Failed to open 'export' for writing: Permission denied Aug 09 08:23:30 frosst2906 sudo[23073]: bmterra : TTY=pts/3 ; PWD=/sys/class/gpio ; USER=root ; COMMAND=/usr/local/bin/mraa-gpio set 13 out Aug 09 08:23:30 frosst2906 sudo[23073]: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=1000) Aug 09 08:23:30 frosst2906 libmraa[23075]: libmraa version v2.1.0-24-gf0f62c4 initialised by user 'root' with EUID 0 Aug 09 08:23:30 frosst2906 kernel: export_store: invalid GPIO 13 Aug 09 08:23:30 frosst2906 libmraa[23075]: UP Xtreme: Platform failed to find I2C0 controller Aug 09 08:23:30 frosst2906 libmraa[23075]: UP Xtreme: Platform failed to find I2C0 controller Aug 09 08:23:30 frosst2906 libmraa[23075]: UP Xtreme: Platform failed to find I2C1 controller Aug 09 08:23:30 frosst2906 libmraa[23075]: UP Xtreme: Platform failed to find I2C1 controller Aug 09 08:23:30 frosst2906 libmraa[23075]: Adding i2c bus found on i2c-3 on adapter i2c_designware.4 Aug 09 08:23:30 frosst2906 libmraa[23075]: Adding i2c bus found on i2c-5 on adapter i2c_designware.6 Aug 09 08:23:30 frosst2906 libmraa[23075]: Adding i2c bus found on i2c-2 on adapter i2c_designware.3 Aug 09 08:23:30 frosst2906 libmraa[23075]: up: Failed to find pin name I2C2_SDA Aug 09 08:23:30 frosst2906 libmraa[23075]: up: Failed to find pin name I2C2_SCL Aug 09 08:23:30 frosst2906 libmraa[23075]: up boards: kernel pinctrl driver available Aug 09 08:23:30 frosst2906 libmraa[23075]: Checking additional Platform support for LEC-AL iPI Aug 09 08:23:30 frosst2906 libmraa[23075]: gpio: platform doesn't support chardev, falling back to sysfs Aug 09 08:23:30 frosst2906 libmraa[23075]: libmraa initialised for platform 'UP' of type 12 Aug 09 08:23:30 frosst2906 libmraa[23075]: gpio13: init: Failed to write to 'export': Invalid argument Aug 09 08:23:30 frosst2906 sudo[23073]: pam_unix(sudo:session): session closed for user root

Could you help me out here? Many thanks in advance

frosst2906

@garyw

Thank you for the instructions on bringing up the GPIO for UP-board.
I followed your instructions but I do still fall into some issue.

To start with, this is the output I get when I list out my GPIOs

when I try to set the pin 13 as output, at first I get a permission error even though the group gpio is added to sudo.

and then, I try it as root,

could you throw some light on this?
Thanks a lot in advance :-)