TMS320C6657: How to implement NMI for IPC interrupt

Hello

We're looking into this.

Hello,

Can you explain what the use case is here?

Generally, an IPC interrupt is triggered from Core 1 for Core 2 and vice versa. I don't think a Core 1 NMI can be triggered from Core 2.

What is the reason for not using existing IPC interrupts? If you can provide more information about your use case, we can probably provide more guidance.

Dear Sahin

Thank you for your quick reply, and very sorry for overlooking it.

The reason for trying to use NMI for IPC is the following.
In our system, core1 is closed for our system.
And core2 is opened to our users.
Our users can write their program to core2.
And if the execution time of user's interrupt function, which is located
to core2, is bigger than interrupt period, the interrupt function is always executed.
Even in that case, we need to sure interrupt from core1 to core2 to stop user's
program.

"Stop" process is triggered from core1 to core2.
And in the above case, "Stop" process is not executed because
user's interrupt function is always executed.

If NMI can be used as IPC interrupt, anytime "Stop" process can be executed.
I know there is interrupt priority level.
But already in our system, user's interrupt level is higher than IPC interrupt.
And it can not be changed.

So if you have a good idea, could you teach us?
Thank you.

Best Regards,
Katsuhiko Watanabe

Dear Sahin

Could you give us any advice?

That would be helpful.

Best Regards,

Katsuhiko Watanabe

Hello,

It looks like NMI actually can be used to interrupt other cores using the NMIGRx register. Please see the snippet below from the C6657 datasheet:

Regards,
Sahin

Dear Sahin

Thank you for your reply.

I know (NMIGRx) register.
I want to know how to use NMI as for IPC interrupt.
Could you have any idea?

Thank you.

Best Regards,
Katsuhiko Watanabe

Hello,

I'm sorry for the delay here. I will need a few more days to get back to you.

Regards,
Sahin

Hello,

I spoke with the developer, and you will need to modify the IPC driver which is generally not supported by TI.
The interrupt source is located in the directory ~\ipc_x_xx_xx_xx\packages\ti\sdo\ipc\family\tci663x\

The IPC libraries can then be rebuilt using the SDK top-level makefile.

Regards,
Sahin

Dear Sahin

Thank you for your information.
It is useful.
Could you give me sample code which teaches me how to implement NMI, if possible?

Best Regards,
Katsuhiko Watanabe