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Hatte · 2020-04-06

I need to dynamically change waveforms on a PWM output on an STMF030 MCU.See it as a poor man's alternative to a signal generator using a DAC.It will be used to generate modulated audio waveforms.I am using DMA to lookup (a sine) waveform via a circu...

Hatte · 2020-02-21

Below question relates to STM32F0 and STM32F1 series MCU's.From the documentation (HAL), I have been unable to determine, whether or not on-the-fly changes are supported to the PWM period (TIM_TimeBaseInitTypeDef.TIM_Prescaler) and/or duty cycle (dir...

Hatte · 2020-02-03

I have a requirement to generate two PWM signals on an STMF030 MCUPWM1: 3-5kHz, 40-60% duty cyclePWM2: >40kHz, 1-100% duty cycleI need to combine these two PWM signals, using logic AND, into one (modulated) PWM output, like so:The signals could be co...

Hatte · 2020-07-11

A belated "thank you" for your comprehensive and accurate answer. Much appreciated!

Hatte · 2020-02-21

Thanks for your advise. I conclude, that ...Changing the DMA address requires a disable/enable DMA cycle? Double buffering would require using the Shadow/Preload register?In that case, I would choose to update the prescaler when the UpdateEvent inter...

Hatte · 2020-02-03

Thank you very much for pointing me in the right direction.I have just recently started designing and writing code for the STM32 family, and the timer capabilities are quite complex. Furthermore, Google wasn't much help, as I was unable to figure out...

Hatte · 2020-02-03

Thanks, being a NAND is no problem – I can easily compensate by inverting the generated waveform.

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Best way to change stored waveforms, when using DMA to serve PWM timer

PWM, dynamically changing period, duty cycle (directly or via DMA)

STM32F030: Combining/modulating two PWM signals (logical AND) into one output

Re: PWM, dynamically changing period, duty cycle (directly or via DMA)

Re: PWM, dynamically changing period, duty cycle (directly or via DMA)

Re: STM32F030: Combining/modulating two PWM signals (logical AND) into one output

Re: STM32F030: Combining/modulating two PWM signals (logical AND) into one output