topic communication between cortex A35 and Cortex M4 in i.MX Processors

communication between cortex A35 and Cortex M4

sharmila_devada — Tue, 28 Aug 2018 11:31:36 GMT

Hi,

How to communicate between Cortex A35 and Cortex M4 using IPC APIs ? I am using i.Mx8QX . I am planning to use sc_ipc_open() , sc_ipc_read(), sc_ipc_write(), sc_ipc_close() APIs. Can you please provide the suggestion.

Thank you

Sharmia

Re: communication between cortex A35 and Cortex M4

igorpadykov — Tue, 28 Aug 2018 23:46:36 GMT

Hi Sharmia

for communication between cores one can look on

sect.2.6 Remote Processor Messaging attached Linux Manual.

May be useful https://mcuxpresso.nxp.com to download SDK2.3 for i.MX 8QuadXPlus Beta2

Best regards
igor
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Re: communication between cortex A35 and Cortex M4

sharmila_devada — Wed, 29 Aug 2018 04:01:59 GMT

Hi igor,

Remote Processor Messaging is a blocking function ? I have planned to use MU(Message unit). Since SECO is having MU Block it is secured. How to use sc_ipc_read() , sc_ipc_write() APIs to transfer message bw two core ? I need to write the Application to transfer the data between linux to free rtos and vice versa.

Thank you

Sharmila

Re: communication between cortex A35 and Cortex M4

sharmila_devada — Wed, 29 Aug 2018 04:52:37 GMT

Hi igor,

Is Remote Processor Messaging is a blocking function ? Is it secured one ? We are planning to use IPC APIs. Please provide the input for the same.

Thank you,

Sharmila

Re: communication between cortex A35 and Cortex M4

igorpadykov — Thu, 30 Aug 2018 01:19:16 GMT

Hi Sharmila

one can look at rpmsg documentation

https://www.kernel.org/doc/Documentation/rpmsg.txt

71. Remote Processor Messaging (rpmsg) Framework — The Linux Kernel 4.9.0-rc1+ documentation

Best regards
igor

Re: communication between cortex A35 and Cortex M4

sharmila_devada — Thu, 30 Aug 2018 07:50:51 GMT

Hi igor,

I understand that using rpmsg we can communicate b/w cortex A35 and cortex M4. But my doubt is, is it the only one way for this? Can I use Message unit (MU) which is associated in SECO for communication ? Can i use sc_ipc_read(), sc_ipc_write() APIs for read write Message Unit?

Please provide the answer.

Thank You,

Sharmila

Re: communication between cortex A35 and Cortex M4

sharmila_devada — Thu, 06 Sep 2018 12:10:12 GMT

Hi igor,

Whether rpmsg ping pong application is using secured IPC ?

Regards

Sharmila

Re: communication between cortex A35 and Cortex M4

igorpadykov — Tue, 23 Oct 2018 07:40:21 GMT

Hi Sharmila

do you mean using SECO, I do not think so.

Best regards
igor

Re: communication between cortex A35 and Cortex M4

zhu_meng — Wed, 15 May 2019 06:04:21 GMT

hi， Sharmila

Did you realize inter-core communication with Message unit (MU)? If yes, could you share your method with me?

Thank you，

Best regards
zhu