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TIM1 - USART1 pin conflict - how to solve?

Question asked by karakaya.mehmet on May 15, 2017
Latest reply on May 15, 2017 by Uwe Bonnes

Hello dear forum,

 

I am using F103RC to drive 2 DC motors

 

Thats why I need to use both TIM1 and TIM8

 

However TIM1_CH2 is at the same pin as the USART1_TX

 

I dont use and init USART1_TX pin becouse I only use RX input of USART1 during runtime

 

I initialize serial port 1 before TIMers

 

However I noticed that TIM1_CH2 doesnot produce PWM signal and is always at 2.6 V level

 

I suspect that USART1 is preventing TIM1_CH2 from producing PWM becouse

 

when I dont init USART1 there is PWM signal

 

Am I right ? why is that so ?

 

Can I not only use RX pin (A10) for USART while using A9 port for PWM ?

 

Thank you

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