RPMSG on TorizonCore 6 with Verdin iMX8M-Mini

[hfranco.tx]

Hi @vix,

@vix

one thing that could be useful to me is undesrtanding which is your “test setup”.

On my side, I’m using the Dahlia carrier board (sometimes I also use the development board, but I don’t think it matters here) with the Verdin Mini and the serial cable connected to my computer (X18 USB type C on the Dahlia carrier board), so I can see both linux terminal and the UART from the M4.

I use picocom with a baud rate of 115200 to /dev/ttyUSB3 and /dev/ttyUSB2 to check the messages.

picocom -b 115200 /dev/ttyUSB3
picocom -b 115200 /dev/ttyUSB2

@vix

on the Verdin, echo xxxxx > dev/ttyRPMSG30 to send strings to Cortex-M (I can see messages from Cortex-M debug UART dev/ttuUSB2)

Same here, I use the “echo” command to test the RPMSG. This week I’ve also tested a container with python to write to /dev/ttyRPMSG30, if you want to check:

Reading and Writing rpmsg in .NET

Hi @pkg_su, I’m not used to .NET myself, so I tested on my side using Python and it worked. I used the baud rate 115200. Can you try to change to 115200 to see if it works? I deployed it inside a container with python, using the pyserial library. #!python3 import serial def main(): try: with serial.Serial("/dev/ttyRPMSG30", 115200, timeout=1) as ser: ser.write(b"Toradex!") except Exception as err: print(err) if __name__ == "__main__": main() Please …

@vix

I cannot see in any way the messages echoed back from Cortex-M to dev/ttyRPMSG30 (Torizon doesn’t have neither screen, nor minicom, nor picocom, …).
How do you send strings to Cortex-M (from Cortex-A) and see what it sends you back?

After running the echo command on linux, can’t you see any messages on the /dev/ttyUSB2?

Best Regards,
Hiago.