STM32F0 input capture ( CCR1 stays 0)

lukaskostorz9 · ‎2015-07-30

Posted on July 30, 2015 at 14:17

Hello

I generated code using CubeMX in order to measure a pulse (20Âµs - 100ms).

TIM2 is what I am using for that.

In the HAL_TIM_IC_CaptureCallback I am checking the value in the CCR1 register.

I am expecting that inside CCR1 the captured value will reside.

Unfortunately there is always the preload value as it was configured during initialization of TIM2.

Is there something I messed up? I assume that the timer is not counting at all.

Is there a way to proof this?

Tesla DeLorean · ‎2015-07-30

Posted on July 30, 2015 at 15:17

You could watch TIM2->CNT incrementing.

If it's not incrementing check the TIM2 APB clock is enabled.

If it's not capturing, and flaging a capture event, you'll have to check how it's configured, and if the external signal is present on the correct pin.

Not much detail to work with here.

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Amel NASRI · ‎2015-07-31

Posted on July 31, 2015 at 12:38

Hi kostorz.lukas,

After code generation with CubeMX, what did you added to your main.c file?

CubeMX will only generate initialization code.

Refer to examples under ''STM32Cube_FW_F0_V1.3.0\Projects\USED_BOARD\Examples\TIM\TIM_InputCapture''.

-Mayla-

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