mraa on up4000

KrissNC

Hello
My mraa won't work.
Apparently according to https://forum.up-community.org/discussion/3028/up-board-using-mraa-unable-to-initalize-gpio#latest , a new new kernel would be needed ? (I have the "up" 5.4 kernel, on my unbuntu 20.04
When I try to list the pins, it says "No pins"
What can I do ?

garyw

@KrissNC
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();
}
}

KrissNC

I can see 2 mraa. one from up division (https://github.com/up-division/mraa) and one from eclypse.(https://github.com/eclipse/mraa) which one works on a 5.4 "up" kernel (on a 20.04 ubuntu)
I'll try the eclypse one since you are talking about "official".

KrissNC

It didnt work, using the eclypse mraa, it compiled well thow, and installed well.
(mkdir build, cd build, cmake .., make, make install)

mraa-gpio list

No pins

Lubo

@garyw said:
@KrissNC
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();
}
}

I used this , enhanced x86.c with this , budt mraa is still not working on my UP4000 .
I still see only

mraa-gpio version
Version v2.2.0 on Unknown platform

as well as

mraa-gpio list
No Pins

I am confused, is there clear step by step manual how to get mraa running on UP4000/Ubuntu 20.04 from "clear" board with "kernel 5.4.0 from PPA" installed from this instruction :
https://github.com/up-board/up-community/wiki/Ubuntu_20.04

Any idea how to get it run ?
Thanx.

Lubo

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

• I unpacked new , clean UP4000 from box.
• I installed there clean Ubuntu20.04.
• Then I followed instructions on UP wiki and replaced kernel with 5.4.0 ( link is in previous comment ).
• Restarted board, everything went without issue.
• Then I clone mraa-master from git and updated src/x86/x86 as @garyw sugested, installed cmake, build-essential and so on... and compiled mraa.
• Then I install it. Its all.

still same issue :

mraa-gpio version
Version v2.2.0 on Unknown platform

mraa-gpio list
No Pins

Can someone please confirm that mraa is running on UP4000/Ububtu , and give instructions how to get mraa running on "clean 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