STM32H7 GPIO control by both M4 and M7

[R_DSP]

Hello,

I have a GPIO pin that is owned and used by the M4, i.e. Pin Context Assignment.  But on power-up, I'd like the M7 to do some work with it, toggle the state, before it starts the M4.  Is it possible for the M7 to programmatically take ownership of the GPIO pin, then transfer it back to the M4 just before it starts the M4?

Regards,

Robert 

[TDK · Accepted solution]

Yes, both cores can access it at any time without any other setup. The context assignment in CubeMX only configures which core initializes the pin.

[R_DSP]

Great, thanks for the quick reply.

Robert