stm32c0x use debug pins as gpio input pins

[Hollis_K]

Hi, may i know how do i declare the debug pins (PA13, PA14) as input pins after programming?

[Aime · Accepted solution]

Hi @Hollis_K ,

The pins PA13 and PA14 can be remapped as input in your application, the same way as for any other GPIOs.

Best regards,

Aime

[ONadr.1]

If you need to debug and at the same time use these pins for IO operations, it is possible to use the same MCU in a case with more pins and use other GPIOs instead of PA13,14. After debugging the program, change back to PA13,14 and write the debugged program into a small case. It is almost necessary for 8-pin cases.

[Hollis_K]

Hi @Aime ,

thanks for the information. After debugged the program, necessary to reset gpio pin if using the debug pins as input pins? There are some reference i find if using debug pins as the gpio output pins: 

...

LL_GPIO_SetOutputPin(GPIOA, LL_GPIO_PIN_14);
LL_mDelay(1);
LL_GPIO_ResetOutputPin(GPIOA, LL_GPIO_PIN_14);
LL_mDelay(500);
LL_GPIO_ResetOutputPin(GPIOA, LL_GPIO_PIN_13);
LL_mDelay(1);
LL_GPIO_SetOutputPin(GPIOA, LL_GPIO_PIN_13);

...

if use as gpio input, will it be the same? Curious about that.