DMA channel1 Stream 0-7 which channel to choose

[StanJerm]

Hi i m working on H732 timer1 as PWM and its working fine, but when I try to implement DMA on timer1, there is no waveform. I enclosed the DMA code below, as I declare an array of 10 PWM duty cycle values..

i suspect it's the Timer1 channel1 stream that's causing the issue, can anyone advise which stream to choose? (stream 0-7 ? )

  HAL_TIM_PWM_Start_DMA(&htim1, TIM_CHANNEL_1, (uint32_t *)pwmAll, 10);  

 

 

[TDK]

The streams within a DMA are equivalent in all important aspects. In any case, choosing a different stream will not fix the problem.

The problem is likely that the array is not in a location that the DMA can access.

DMA is not working on STM32H7 devices - STMicroelectronics Community

[StanJerm]

***! Why did the H7 series got this DMA issue? It looks like I have to migrate to F7 series? 

[TDK]

> ***! Why did the H7 series got this DMA issue? It looks like I have to migrate to F7 series? 

Did you read the linked article? It doesn't sound like you did.

[waclawek.jan]

Because it's very complicated. 

And that's because that's the only way to achieve the high operational speed. 

JW