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

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?

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Best answer by Vangelis Fortounas

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

Senior III

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.

Associate II