Choosing GPIO Context between Cortex M4 and Cortex A7 using STM32CubeMX

[darla14]

Hello ,

I have a few queries related to assignments of GPIO wrt to Cortex M4 and Cotex A7 . Task is to add a I2C peripheral to a GPIO and access it using Cortex M4.But I cant see the cortex assignment options ? I see on few but not on some on which I actually want.(like PA12)

 

Also I see pin locking on some GPIO? Does that mean I can’t connect anything to these GPIOS?

 

Also on the I2C1 , to which context it is assigned by default? Both Cortex M4 and A7 or to one of them?

please advise!

Thanks in advance!

D

[PatrickF · Accepted solution]

Hi @darla14​ ,

Please look at https://wiki.st.com/stm32mpu/wiki/How_to_assign_an_internal_peripheral_to_a_runtime_context

the only trick needed to assign pure GPIOs to Cortex-M4 (i.e. not used by a peripheral) is to right+click on the pin (set in GPIO input or output). Otherwise, the GPIO HAL initialization code is not generated.

Regards.

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[darla14]

Thanks @PatrickF​  let me try this !

Br