topic Re: Question about RPMsg in i.MX Processors

Question about RPMsg

xu_ji1 — Wed, 24 Apr 2019 10:20:00 GMT

Hello，

I want to ask that A core communicate with M4 core use RPMsg SW side,and for HW side is it used MU in M4 or MU

in A core LSIO or both used in M4 and A core?

Thanks

Re: Question about RPMsg

diegoadrian — Wed, 24 Apr 2019 16:31:03 GMT

Hello,

In which i.MX chip are you working?

Best regards,

Diego.

Re: Question about RPMsg

xu_ji1 — Thu, 25 Apr 2019 01:09:37 GMT

Hello，

The chip is I.MX8QXP which I used.

Thanks

Re: Question about RPMsg

diegoadrian — Tue, 30 Apr 2019 21:06:26 GMT

Hello,

Unfortunately, the i.MX8QX is still on preproduction and we do not have any official information available for the moment. I apologize for the inconveniences this could give you.

Best regards,

Diego.

Re: Question about RPMsg

xu_ji1 — Sun, 05 May 2019 10:24:08 GMT

Hello，

How about i.MX7 chip?

Thanks

Re: Question about RPMsg

diegoadrian — Mon, 06 May 2019 21:19:03 GMT

Hello,

For the i.MX7. The RPMsg is the Linux API that is in charge of communicating the core A7 and M4. The RPMsg is a virtio-based messaging bus, which allows kernel drivers to communicate with remote processors available on the system.

The MU is the unit module from the i.MX that enables two processors within the SoC to communicate and
coordinate by passing messages (e.g. data, status and control) through the MU interface.

Hope this information could help you.

Best regards,

Diego.

Re: Question about RPMsg

xu_ji1 — Tue, 07 May 2019 01:32:39 GMT

Hello，

Then the MU unit is a sub module in core A7 or M4 in i.MX7 ？

Thanks

Re: Question about RPMsg

diegoadrian — Fri, 31 May 2019 14:31:01 GMT

Hello,

On the i.MX7D, the A7 is the core principal of the i.MX. Every other peripheral, including the cortex M4, are submodules. However, the MU is the module that is in charge of coordinate by messages both cortex.

Hope this can help you.

Best regards,

Diego.