GPIOs Input detecting issue on port M

[Kaushik1]

We have implemented a total of five push buttons—two connected to Port E and three connected to Port M. 

The GPIOs of Port E are functioning correctly. However, the GPIOs of the push buttons on Port M are not being detected properly by the MCU.

Even when the switches are unpressed, the MCU is detecting a Pressed condition.

PORT M GPIO Pin out: PM1, PM2, PM3.

MCU part: #STM32H7R7L8H6H

I have checked  push button from hardware side, its working fine.

Attached example schematic snapshot of push button.

Could you please advise if there are any specific settings or configurations required for Port M GPIO to function correctly?

@Shubham Prakashpant BOHARAPI @Shailesh Patil @Krishan Kumar SOLANKI

[Kaushik1]

please review the image. it is conflict between UCPD1 and GPIO PM1.

[Andrew Neil]

Do you need to do it for both application and boot ?

Otherwise, I don't know.

Have you looked at examples for NUCLEO-H7S3L8 and/or STM32H7S78-DK ?

[Kaushik1]

Do you need to do it for both application and boot ? 

OK

i will check in STM32H7S78-DK.

[AScha.3]

So if you cannot change the buttons to other pins...

try (with enabled UCPD1) : change the pullups 10k -> 2k (to override the internal 5k pulldown), on PM0 +1 .

[Kaushik1]

Thanks @Andrew Neil 

we have added this line in code,

SET_BIT(PWR->UCPDR, PWR_UCPDR_UCPD_DBDIS);

and It is worked as expected.

Regards,

Kaushik