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quintanabarcia.pablo · 2019-06-10

Hello, Community.I am currently trying to control a power converter with a STM32F4 microcontroller. The thing is that the control variable is the frequency of the PWM. I have programmed a timer (TIM3) that generates an interruption every 100us. Durin...

quintanabarcia.pablo · 2019-02-12

Hi,I am currently working with an STM32F0 Discovery Board (with CubeMX and HAL). I am trying to shift two PWMs.The first thing I tried was to program TIM1 and TIM3 as follows:Channel 1 of TIM 1 is the trigger of the TIM3 PWM and the configuration of ...

quintanabarcia.pablo · 2019-06-11

Thanks to all

quintanabarcia.pablo · 2019-06-10

Thank you. I have forced the update of the PWM and it works as it should. However, I have to keep working on it because I cannot have two pulses right away. My strategy of getting into the control loop every 100us is not suitable because it interfere...

quintanabarcia.pablo · 2019-06-10

I have tried one simple thing.Every 100us I change the frequency of the PWM by modifying the ARR register just by adding or substracting 10 to the original value. And every time the microcontroller does the same as in picture 2. The very first 2 or 3...

quintanabarcia.pablo · 2019-06-10

i tried changing the order of the instructions and it works the same way.Duty is not constant because it depends on the ARR. I read about enabling ARPE and OC1PE but it doesn't work either.

quintanabarcia.pablo · 2019-04-10

I know that if you put duty = 0 with the HAL function, the stop is immediate. I haven't tried any other method at all. It seems waclwek.jan is right and the output remains in three-state for a while.

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Re: Modify PWM frequency on the fly (STM32F4)

Re: Modify PWM frequency on the fly (STM32F4)

Re: Modify PWM frequency on the fly (STM32F4)

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