External clock for timer

[oattao]

Hi all,
I want to use Timer in counter mode, but I don't find how to config to use external clock for Timer. Please help me.
Thanks in advance.

[Giovanni]

Hi,

Currently the HAL does not have a driver that does that, you may use the timer directly at register level and use RCC/NVIC functions in order to enable the timer clocks/ISRs like the HAL drivers do.

Giovanni

[kopanz]

Hi,

Currently the HAL does not have a driver that does that, you may use the timer directly at register level and use RCC/NVIC functions in order to enable the timer clocks/ISRs like the HAL drivers do.

Giovanni

Hi Giovanni,

Can you please explain this a little more, I seached a lot but couldn't find anything on using stm32f4 timers as pulse counters in ChibiOS.

Thank you

[Giovanni]

Hi Giovanni,

Can you please explain this a little more, I seached a lot but couldn't find anything on using stm32f4 timers as pulse counters in ChibiOS.

Thank you

You should read the STM32 Reference Manual and program the timers accordingly at register level, ChibiOS is not directly related to this except for interrupts initialization.

If I remember well it is possible to use an external clock for timers, that clock line would be your input, the timer counter would increase on input fronts.

Giovanni

[kopanz]

Hi Giovanni,

Can you please explain this a little more, I seached a lot but couldn't find anything on using stm32f4 timers as pulse counters in ChibiOS.

Thank you

You should read the STM32 Reference Manual and program the timers accordingly at register level, ChibiOS is not directly related to this except for interrupts initialization.

If I remember well it is possible to use an external clock for timers, that clock line would be your input, the timer counter would increase on input fronts.

Giovanni

Thank you, this is more explanatory.