How to install mraa and get it running on UP4000 / Ubuntu ? (step by step instructions request )

Lubo

I ensured again that there is something not clear with mraa on UP4000/Ubuntu installation...

• I unpacked new , clean UP4000 from box.
• I installed clean Ubuntu20.04. there, no issue.

• Then I followed instructions on UP wiki and replaced kernel with 5.4.0 , again without issue. Restarted board, everything without issue.

• Then I clone mraa-master from git and updated src/x86/x86 as was sugested in different discussion :

@garyw said:
if you are using official mraa from Github with our up 5.4 kernel, you have add the UP4000 board name "UP-APL03" into src/x86/x86.c as

else if (strncasecmp(line, "UP-APL03", strlen("UP-APL03") + 1) == 0) {
platform_type = MRAA_UP2;
plat = mraa_up2_board();
}
}

, installed cmake, build-essential and so on... and compiled mraa.
Then I install it. Its all. No issue so far.

But regarding to mraa - there is issue to run it :

mraa-gpio version
Version v2.2.0 on Unknown platform

mraa-gpio list
No Pins

Can someone please get us step by step instructions, how to get mraa running on UP4000/Ububtu on "clean, just unpacked" UP4000 ?

garyw

@Lubo
we are switching to new pinctrl driver, if you don't need customization kernel (UP kernel 5.4),
you can refer below comment I provide to other user. it's suitable for UP 4000 too.

https://forum.up-community.org/discussion/comment/13367#Comment_13367

Lubo

Thank you,
the answer in different discussion helped me lot :

https://forum.up-community.org/discussion/comment/13367#Comment_13367

mraa works now.

But I am facing another issue now, with pin availability, maybe pin mapping ? but I will describe it in different thread, because mraa is working now.