STM32H7 PC2_C and PC3_C GPIO not working

Peter3718 · ‎2024-11-04

Originally a reply in this thread: https://community.st.com/t5/stm32cubemx-mcus/bug-cubemx-should-warn-h7-users-against-pc2-c-pc3-c-pitfalls/td-p/708817

Hi,

What's wrong with PC2_C and PC3_C??? I am using them as normal GPO on my board, but it's not working, while PC0 and PC1 are working, same initialization and HAL_GPIO_WritePin() operation.

Thanks

Peter

SofLit · ‎2024-11-15

@Peter3718 wrote:

I mean RM0399 user manual should be revised as following:

1: Analog switch closed

0: Analog switch open

Why it should be?

RM is correct and the status of the switch is:

Closed when PCXSO = 0 and

Open when PCXSO = 1

And the default value of PCXSO bit in SYSCFG_PMCR register depends on the package.

Check your part number according to this table:

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Peter3718 · ‎2024-11-15

I mistake the byte number. You are correct, 0 is close and 1 is open.

Thanks