Timer PWM change period on runtime

Zarck.zek · ‎2017-06-12

Posted on June 12, 2017 at 11:17

Hi everyone,

In my project, I need to generate a PWM with some parameters which need to be changed during runtime.

Here are the parameters :

- Duty cycle

- Period

- Voltage level (I think this one is not possible... maybe there is an alternative way you may know?)

First of all, I generate the PWM without troubles.

I am able to change the duty cycle on runtime using __HAL_TIM_SET_COMPARE(__HANDLE__, __CHANNEL__, __COMPARE__) macro

Now, it is possible to change the period while runtime using this kind of macro? I can't find it.

Thank you very much,

Marc

#pwm #timer

waclawek.jan · ‎2017-06-12

Posted on June 12, 2017 at 11:23

/**

* @brief Sets the TIM Autoreload Register value on runtime without calling

* another time any Init function.

* @param __HANDLE__: TIM handle.

* @param __AUTORELOAD__: specifies the Counter register new value.

* @retval None

*/

#define __HAL_TIM_SET_AUTORELOAD(__HANDLE__, __AUTORELOAD__) \

do{ \

(__HANDLE__)->Instance->ARR = (__AUTORELOAD__); \

(__HANDLE__)->Init.Period = (__AUTORELOAD__); \

} while(0U)

waclawek.jan · ‎2017-06-12