What am I supposed to do to use PA14, PA15 in STM32F103xx?

[Carter Lee]

Posted on September 25, 2017 at 10:45

Hi.

In the STM32F103, I'd like to control PA14, PA15 pin to I/O, But It's not controlling as my mind.

When I checked that with reference document, I found the below information.

I think If I want to use PA14 and PA15, then I have to do something.

If I want to use PA14 and PA15, what am I supposed to do?

[AvaTar]

Posted on September 25, 2017 at 11:16

If I want to use PA14 and PA15, what am I supposed to do?

Configure them as you do with others.

But I would think twice (or thrice) before doing so. You loose the ability to debug.

[Vangelis Fortounas · Accepted solution]

Posted on September 25, 2017 at 14:35

Hi!

The way to use PA14,PA15 as normal GPIOs  is to use

 __HAL_RCC_AFIO_CLK_ENABLE();

__HAL_AFIO_REMAP_SWJ_DISABLE()  macros.

But after this there is no debug functionality (you can program your device only under hardware reset).

Rgrds

vf