Can not send CAN frames with STM32MP15F-EVAL and can-utils

[DmnSd]

Hello,

I'm trying to send a CAN frame with can-utils library on STM32MP157F-EVAL board.

I read the following sites [1] and [2] and tried the commands:

root@stm32mp1:~# ip link set can0 up type can bitrate 1000000
root@stm32mp1:~# cansend can0 055#11223344
root@stm32mp1:~# cansend can0 055#11223344
root@stm32mp1:~# cansend can0 055#11223344
root@stm32mp1:~# cansend can0 055#11223344
root@stm32mp1:~# cansend can0 055#11223344
root@stm32mp1:~# cansend can0 055#11223344
root@stm32mp1:~# cansend can0 055#11223344
root@stm32mp1:~# cansend can0 055#11223344
root@stm32mp1:~# cansend can0 055#11223344
root@stm32mp1:~# cansend can0 055#11223344
root@stm32mp1:~# cansend can0 055#11223344
root@stm32mp1:~# cansend can0 055#11223344
write: No buffer space available

no messages are sent and after some trys I get the error: No buffer space available.

root@stm32mp1:~# candump can0

candump also receives no frames.

The opposite station sends can messages and they are arriving the stm32 eval board. I have measured this with an oscilloscope.

what am I doing wrong?

How can I configure the eval board to send can frames?

Kind regards,

Dmn

[Olivier GALLIEN · Accepted solution]

Hi @DmnSd​ ,

Looks like a known bug we already identify and we are integrating.

You can find a version of patch here : https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=b0342b87cad88894a989604df549e88ff47fb513

Keep you posted when integrated in ST delivery

Olivier

[DmnSd]

Dear @Community member​ ,

thanks for your answer.

Well that's the problem. If I patch kernel with the mentioned file I can send and receive CAN frames.

Thanks a lot!

I will wait for the official fix in linux-stm32mp.

Kind regards,

Dmn