Accessing my kernel rpmsg buffer from user space

ababatola — Tue, 24 Oct 2023 10:11:18 GMT

Hi,

I have been able to communicate between my imx8mp MPU and the MCU. However, I want to access the data in the shared memory from the user space. Is there an example for this?

I would also like to ask if the imx_rpmsg_pinpong.c device driver can be extended to handle linux Userspace I/O for the communication between the kernel space and the user space.

Thanks

Re: Accessing my kernel rpmsg buffer from user space

hector_delgado — Tue, 31 Oct 2023 20:21:14 GMT

Hi @ababatola ,

I hope you're doing well! Sorry for the late reply.

I'd recommend taking a look at the rpmsg_lite_str_echo_rtos multicore example found in the i.MX 8M Plus SDK. It's a simple application which allows you to send a message from the Cortex A to the Cortex M and then M4 displays what is received, and echoes back the same message as an acknowledgement.

You can build and download the SDK from https://mcuxpresso.nxp.com/

Let me know if this works for you.

Best regards,
Hector.

i.MX ProcessorsのトピックAccessing my kernel rpmsg buffer from user space

Accessing my kernel rpmsg buffer from user space

Re: Accessing my kernel rpmsg buffer from user space