STM32F042F6- TSSOP20- Where is the TIMER 2 Channel 1?

[chulinhtre]

Posted on November 01, 2016 at 17:28

Dear all experts,

I am programming Incremental Encoder Reading project for 2 encoders.I intend to use TIM2, and TIM3 for Encoder Config with 4X Reading. I check the datasheet (DM00105814) for MCU Pin configuration.For TIM3, I can see TIM3-CH1, and TIM3_CH2 are Pin PA6, PA7For TIM2, I cannot find TIM2-CH1, instead of that, I see 2 pin PA0 and PA5 can config to same function TIM2-CH1-ETR.As subject, Could any one can help me to find out TIM2-CH1?Thank you in advance.

[Tesla DeLorean]

Posted on November 01, 2016 at 17:39

TIM2-CH1-ETR is TIM2-CH1 and TIM2-ETR, as ETR is an input only it doesn't conflict, and would need to be configured inside the timer to be used.

[chulinhtre]

Posted on November 01, 2016 at 18:08

Thank you very much Clive1,

I solved the problem by :

/* (3) Select AF2 on PA5 in AFRL for TIM2_CH1 */

GPIOA

->

AFR

[

0

] |=

0x02

<< (

5

*

4

);

/* (3) */