TIM12 TRGO can't handle DMA request generator (STM32H743vit6)

[SeyyedMohammad]

As noted in reference manual TIM12 TRGO is connected to DMAmux DMAgenerator. I have written program that LPTIM3 can handle DMA but in case of TIM12 there is no reaction from DMA. I've appended the code, it's base on STM32cubeIDE 1.10.1. I think it must be bug but could you please see my simple code demonstrating this problem?

By inverting comment of these two you will switch between LPTIM and TIM12:

//  HAL_DMAEx_EnableMuxRequestGenerator(&hdma_dma_generator1);
  HAL_DMAEx_EnableMuxRequestGenerator(&hdma_dma_generator0);
 
//  HAL_DMA_Start(&hdma_dma_generator1, (uint32_t)&buftemp, (uint32_t)&buftransit, 1);
  HAL_DMA_Start(&hdma_dma_generator0, (uint32_t)&buftemp, (uint32_t)&buftransit, 1);

Note that thi TIM12 code will hardfault after a few miniute.

[FBL · Accepted solution]

Hello @SeyyedMohammad​ 

This problem is raised internally to be reviewed. I'll keep you informed with the updates.

Internal ticket number: 136923 (This is an internal tracking number and is not accessible or usable by customers).

[FBL]

I confirm trigger output parameters are missing in CubeMX for TIM12,

I suggest doing it manually until the fix, you can refer to the code attached which set MMS bit to 0x02 in TIM12 control register (TIM12_CR2)

[SeyyedMohammad]

Thank you so much.👌