STM32F4 Input Capture TIM2 Channel 4

Posted on August 21, 2015 at 14:02

Hello

I'm faced to the Problem that I do have to use TIM2 channel 4 for Input capture.

I know that channel 4 can not be used like 1 to 3.

But I thaught I can use the channel 4 to get edges and take CCR4 as counter to take its value each time I detect an positive edge.

I get an IRQ each time a positive edge occurres but CCR4 doesn't count up.

To compare the behaviour I'm using TIM3 channel 1 where it works well with the same configuration (of course TIMx is different) as simple input capture.

Does anyone know where the difference can be?

Thanks

#stm32