topic Re: RPMSG / AMP between CPU and MCU in separate chips in Kinetis Microcontrollers

RPMSG / AMP between CPU and MCU in separate chips

ssinfod — Tue, 09 May 2017 20:52:07 GMT

Hello,

I'm reading about RPMSG and openAMP:
RPMsg-Lite User's Guide: RPMsg Component

GitHub - NXPmicro/rpmsg-lite: RPMsg implementation for small MCUs

open-amp/openamp_ref.pdf at master · OpenAMP/open-amp · GitHub

It seems that RPMSG is principally use when two CPU or when a CPU/MCU are inside the same silicon chip.
(ex: i.mx6 SoloX or i.mx7 or vybrid)

However, I would like to know if :
Is it possible to use RPMSG between an (external) Kinetis MCU and a (external) Single core i.mx6 ?
(or)
Is it possible to use RPMSG between two external Kinetis MCU ?

In short, does RPMSG / OpenAMP applies only to single silicon chip with multiple cores or can I use it between two separate chips ? What would be the best interface between these chips ? (UART or SPI ?)

Thanks

ssinfod

Re: RPMSG / AMP between CPU and MCU in separate chips

dusancervenka-b — Thu, 11 May 2017 20:33:23 GMT

Hi RPMSG lite is using shared memory (i am not sure but shared memory is the main request). Here is RPMSG example on iMX and Lpc board : GitHub - EmbeddedRPC/erpc-imx-demos: eRPC demos for i.MX devices.

Re: RPMSG / AMP between CPU and MCU in separate chips

fangli — Mon, 15 May 2017 05:28:23 GMT

Hi,

From the technical perspective, the RPMSG/AMP is really designed for asymmetric multiprocessor systems, the most common way for different cores to cooperate to use a shared memory-based communication. Here the cores means "dual core" not "two cores". So what you mentioned the two seperated two chips, I do not think that the PRMSG applied.