STM32H743 PWM

[MTS]

hello friends)))) I bought a new stm32H743 for familiarization and got confused how to implement PWM on HRTIM. I'm trying to do PWM on timer B. configured GPIO_PC8 to AF1 in GPIOx_AFRH. everything is fine there.

HRTIM_B_PERxR==2000
HRTIM_B_CMP1xR==2000
HRTIM_B_SETx1R installed bits PER and CMP1
HRTIM_RSTx1R  installed bits  PER and CMP1
HRTIM_OENR  installed TB1OEN
HRTIM_TIMxCR installed  CONT
HRTIM_MCR installed TBCEN

what else do I need for PWM to work?

[MasterT]

Check it out:

https://github.com/STMicroelectronics/STM32CubeH7/tree/master/Projects/NUCLEO-H743ZI/Examples/HRTIM

[MTS]

I don't use libraries. can you tell me what else needs to be included in the registers?do you need dead time?

[MTS]

how can you understand how the HRTIM timer works if most of it is hidden from you in the header files of the "C" language? I do not know where to ask more. STM support is silent as always. if there was good documentation, I wouldn't ask.

[MasterT]

Read: RM0433 Reference manual

You don't have to use libraries, just study each function call that HAL_ driver does for you, and set each register manually. Doing so you are wasting a lot of time, and need to be careful to set registers in correct order - some hardware like DMA very stubborn in this aspect, it's even wouldn't tell you what is correct sequence it's expecting.

[waclawek.jan]

I don't use HRTIM nor 'H7, but my mantra is, read out and check content of relevant registers (HRTIM and GPIO).

You probably should see some counter changing, too.

JW

[MTS]

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