help with timers

[infor]

Posted on April 15, 2015 at 09:49

I just created this simple project for an STM32F429 discovery board:

1) TIM1 is configured to produce a square waves on OC2 (PA9) 2) TIM2 is configured to use the ETR pin as clock source (PA5) 3) USB periodically sends a message with the value of TIM2.CNT By connecting PA9 and PA5 I would expect to see TIM2.CNT increasing, but this is not the case. I checked PA9 with a logic state analyser, and the expected output is there. So the problem is in the configuration of the input. I used STM32CubeMX to create the configuration, and everything seems ok. The registers of TIM2 are: - in SMCR, SMS = 0b111 and TS = 0b111. According to the manual this sets ETR as clock source - in CR1, CEN = 1 Every other register is 0. Can someone help me in finding my error? Thanks I am experimenting a discovery board with F429. #stm32f4 #timers #i-can''t-help-you-with-that

[Tesla DeLorean]

Posted on April 15, 2015 at 18:11

Can someone help me in finding my error?

May be someone can, I'm not using Cube/HAL

[infor]

Posted on April 21, 2015 at 09:33

May be someone can, I'm not using Cube/HAL

In facts, I described the contents of the registers, in the hope that someone can see where the problem is...without involving Cube