RPMsg example question

[dougbaker]

I am using a IMX8 with a A53 and a M7.  The M7 code is built with VSCode and MCUXpresso environment.  The M7 runs Free RTOS and I have the M7 running example projects.  I have the example “multicoe_examples/rpmsg-lite-str-echo-rtos-remote”  running but I have some questions about it.

On a fresh boot, it generally works when I can sent messages from the A53 to the M7.  If I restart jut the M7 CPU, the messages do not The messages only work after a full reset including the A53.  When rebooting justthe m7 core, the M7 fails on the following call: rpmsg_lite_is_link_up(my_rpmsg);

Is there a example or recommended way to implement 2 endpoints between the A53 and the M7?  How should two endpoints between the two cores be implemented?

Am I asking this question in the right forum?

Thanks,

Doug

[dougbaker]

echo start > /sys/class/remoteproc/remoteproc0/state^C

[dougbaker]

echo start > /sys/class/remoteproc/remoteproc0/state

[Zhiming_Liu]

Hi @dougbaker 

How did you load the M7? Using Linux remoteproc sysfs or U-Boot commands? 

Best Regards,
Zhiming