RTOS/66AK2H12: IPC between ARM cores

Bruce McKinley

Intellectual 760 points

Part Number: 66AK2H12

Tool/software: TI-RTOS

Hi,

I'm trying to get IPC running between two ARM cores on the K2H. I searched for answers and came across this post:

e2e.ti.com/.../604499

The answer says to use SMP BIOS and provides a link to a post that has been deleted.

I really want to use IPC because we have a successful implementation that worked from ARM0-DSP0. Can I just name ARM1 "CORE1" in the config file like this?

xdc.useModule('ti.sdo.ipc.MessageQ');
Program.global.procName = "CORE1";
var ipc_cfg = xdc.loadCapsule("../shared/ipc.cfg.xs");

Thanks,
Bruce

over 8 years ago

0 Yordan Kovachev over 8 years ago

TI__Guru**** 161600 points

Hi,

See the Wiki:
processors.wiki.ti.com/.../BIOS
Specifically the part under "Cortex-A15 specific configuration settings:".

There are also two examples available:
processors.wiki.ti.com/.../File:SMPExample1_CortexA.zip
processors.wiki.ti.com/.../File:SMPExample2_CortexA.zip

Best Regards,
Yordan

0 Bruce McKinley over 8 years ago in reply to Yordan Kovachev

Intellectual 760 points

Sorry, but this doesn't answer my question. SMP is nothing like IPC. In order to use SMP, we have to re-architect all our existing code, which is what I'm trying to avoid. Also, I would like to avoid forcing ARM0 to handle all interrupts in the system.

Can you please answer the question directly: I already have IPC working between ARM0 and DSP0 with messageQ. How can I use IPC between ARM0 and ARM1 (instead of DSP0)?

Thanks,
Bruce

0 Yordan Kovachev over 8 years ago in reply to Bruce McKinley

TI__Guru**** 161600 points

Hi,

I've notified the RTOS team. They will post their feedback directly here.

Best Regards,
Yordan

0 Sahin Okur over 8 years ago in reply to Bruce McKinley

TI__Mastermind 27355 points

Hi Bruce,

Unfortunately IPC does not support ARM to ARM communication running non-SMP. The recommended method for ARM-ARM is to use SMP to communicate between processes using BIOS mechanisms.

0 Bruce McKinley over 8 years ago in reply to Sahin Okur

Intellectual 760 points

OK, we will use SMP. It seems a shame that we have to change the entire infrastructure for core-core communications. No, it's just wasteful. If you can go from ARM-DSP. You ought to be able to go ARM-ARM.

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RTOS/66AK2H12: IPC between ARM cores