ARM, RISC-V контроллеры

HAL_DMA_Init(&hdma_tim1_up);
HAL_DMA_Start(&hdma_tim1_up, (uint32_t)&DMAbuff, (uint32_t)&GPIOB->ODR, MAX_TICKS);
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
TIM1->DIER |= (1 << 8);

Или с регистрами

  DMA2_Stream5->PAR = (uint32_t)&(GPIOB->ODR); 		// Set peripheral address
  DMA2_Stream5->M0AR = (uint32_t)&DMAbuff;			// Set memory address
  DMA2_Stream5->NDTR = MAX_TICKS; 					// set number of bytes to transfer
  
  DMA2_Stream5->CR =  (6 << DMA_SxCR_CHSEL_Pos) |	// enable channel 6 (TIM1_UP)
                      (2 << DMA_SxCR_PL_Pos)    |	// set to high priority
                      (1 << DMA_SxCR_DIR_Pos)   |	//set memory-to-peripheral
                      (1 << DMA_SxCR_MINC_Pos)  |	//Incremement memory address
                      (0 << DMA_SxCR_MSIZE_Pos) |	// Set memory data width to a byte
                      (0 << DMA_SxCR_PSIZE_Pos) | 	// Set peripheral data width to a byte
                      (1 << DMA_SxCR_CIRC_Pos)  |	// Set to circular mode
                      (1 << DMA_SxCR_EN_Pos); 		//enable DMA

  TIM1->DIER |= (1 << 8);   // set UDE bit (update dma request enable)

  HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);