I'm trying to test PingPong example using i.mx6sx SABRE DB, following this tutorial. when I finished it I want to send messages between the two processors. so I've tried to execute this command:
dmesg | grep rpmsg
it shows me an error:
[ 0.307064] imx-rpmsg: probe of 2200000.aips-bus:rpmsg failed with error -12
[ 0.307191] imx rpmsg driver is registered.
and on M4 side:
RPMSG PingPong FreeRTOS RTOS API Demo...
RPMSG Init as Remote
no handshaking is established...
I've checked /dev/ttyRPMSG30 and it's there. though when I try to execute this command it shows me another error:
root@imx6qpdlsolox:~# stty -F /dev/ttyRPMSG30 -echo
stty: /dev/ttyRPMSG30: Inappropriate ioctl for device
even when I try to echo a text nothing will show on M4 side.
I'm not sure what's the problem.