How to define GPIOs as simple input/output in STM32CubeMX?

[Lmoio.1]

Hello,

I'm trying to define some GPIOs as simple input/output for STM32MP157. I'm using the STM32CubeMX tool, but I can't find where to assign the GPIOs to A7 or M4. In the pinout view, I correctly set them as input/output but when I generate the code, I don't find their definition, nor in the device tree .dts, neither in the m4 code (only clock enable is present).

Thanks

[PatrickF · Accepted solution]

Hi,

For M4, after selecting GPIO input or output, you also have to right click on the pin and assign 'pin reservation' to 'Cortex-M4'.

M4 code will then be generated correctly.

For A7, there is no automated generation of device tree in CubeMx, you should add it manually.

For A7/Linux, see:

https://wiki.st.com/stm32mpu/wiki/Overview_of_GPIO_pins

https://wiki.st.com/stm32mpu/wiki/GPIO_device_tree_configuration

https://wiki.st.com/stm32mpu/wiki/How_to_control_a_GPIO_in_userspace

Regards.

[Lmoio.1]

@PatrickF​ Thank you very much!

[PatrickF]

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