GPIO Configuration

lonnie · ‎2008-11-12

Posted on November 12, 2008 at 16:14

GPIO Configuration

lonnie · ‎2011-05-17

Posted on May 17, 2011 at 12:52

If you have two conflicting peripherals and you remap your GPIO to support one, but not the other, is it possible to still use the other peripherial?

In the case of a timer, if you don't map all of its channels to a GPIO pin, can you still use those channels internally?

Has anyone did any experimenting with this or is there a document that addresses this issue?

thanks

16-32micros · ‎2011-05-17

Posted on May 17, 2011 at 12:52

Hi ,

Have a look at :

http://www.st.com/mcu/forums-cat-6268-23.html

http://www.st.com/mcu/forums-cat-6399-23.html

ST1.

lonnie · ‎2011-05-17

Posted on May 17, 2011 at 12:52

Thanks for the links.

From what I gathered so far, if I'm using USART1 and I don't remap TIM1, I could have a conflict if both peripherals are active. There isn't a way to use TIM1's channel 1 and 2 internally without expecting TIM1 to affect the external pins.

So in the case of the AF remap and debug I/O configuration register, if neither USART1 or TIM1 is remapped, I can expect to see an ORed result from TIM1 and USART1 on the shared output pins?