GPIO with OPI PC2

fizga · Published in 2018-8-9 20:06:42

Hello,
I am a beginner in linux and orange PI, I buy an OPI PC2 in order to use a 3D printer with octoprint, I install armbian and I try to run the GPIO without success. I searched for several library but it is all made for the H3 version, I finally found this one https://github.com/tumugin/WiringOP
I managed to install it but I got an error message when I made the command
gpio readall
Here is the result
octoprint @ orangepipc2: ~ $ gpio readall
piBoardRev: Unable to determine board revision from / proc / cpuinfo
-> No "Hardware" line
-> You may want to check:
-> http://www.lemaker.org/

Do you have a solution ?
thank you

svensly · Published in 2018-8-10 04:00:42

Edited by svensly at 2018-8-10 04:02

Hi,
which OS do you use for octoprint?

Follow the install instruction here:
https://github.com/tumugin/WiringOP/tree/h5

fizga · Published in 2018-8-10 15:59:29

Edited by fizga at 2018-8-10 16:01

in fact for now I have not installed OCTOPRINT yet, I'm just trying to run my GPIO

, I'm under Armbian Xenial desktop mainline kernel 4.14.y
I have already followed the instructions and the library installs well. the result described above happens when I try to read the GPIO status.
I contacted the editor of the library and he replied that maybe it would be necessary to patch wiringpi.c, but I do not know how to do or what to change

svensly · Published in 2018-8-10 16:22:09

Edited by svensly at 2018-8-10 16:39

Ok, your Error says, it cant find your board revision. It dont know which board it is. Cant find "the Hardware line" of "/proc/cpuinfo"
Fix the function "isH5()" line 1337. i think it breaks at Line 1352.

if you put "cat /proc/cpuinfo" in terminal you can see, it shows 4 CPUs, but not a hardware name.
on other boards like "Raspberry pi" there is a line "Hardware : BCM2708" for example.

fizga · Published in 2018-8-13 16:51:07

thanks for your answer, here is a solution that seems to work

https://forum.armbian.com/topic/ ... ing-on-proccpuinfo/

Thank you again for your help

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