STMH743，DMA传输PWM失败，之前使用F103的是可以的

好妙呀

STMH743，使用DMA传输PWM，初始化和DMA1 访问的地址都没有错。我使用的是normal模式，若一直循环使用DMA是可以的，但是不能加延时，也不可以改不变发送数组的值，如果改变或者加延时函数就没有信号了。初始化代码和主函数代码如下。 初始化： TIM_HandleTypeDef htim2; DMA_HandleTypeDef hdma_tim2_ch2; DMA_HandleTypeDef hdma_tim2_ch3; /* TIM2 init function */ void MX_TIM2_Init(void) {   TIM_MasterConfigTypeDef sMasterConfig = {0};   TIM_OC_InitTypeDef sConfigOC = {0};   htim2.Instance = TIM2;   htim2.Init.Prescaler = 0;   htim2.Init.CounterMode = TIM_COUNTERMODE_UP;   htim2.Init.Period = 249;   htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;   htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;   if (HAL_TIM_PWM_Init(&htim2) != HAL_OK)   {     Error_Handler();   }   sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;   sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;   if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)   {     Error_Handler();   }   sConfigOC.OCMode = TIM_OCMODE_PWM1;   sConfigOC.Pulse = 0;   sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;   sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;   if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)   {     Error_Handler();   }   if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_3) != HAL_OK)   {     Error_Handler();   }   HAL_TIM_MspPostInit(&htim2); } void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef* tim_pwmHandle) {   if(tim_pwmHandle->Instance==TIM2)   {     /* TIM2 clock enable */     __HAL_RCC_TIM2_CLK_ENABLE();     /* TIM2 DMA Init */     /* TIM2_CH2 Init */     hdma_tim2_ch2.Instance = DMA1_Stream0;     hdma_tim2_ch2.Init.Request = DMA_REQUEST_TIM2_CH2;     hdma_tim2_ch2.Init.Direction = DMA_MEMORY_TO_PERIPH;     hdma_tim2_ch2.Init.PeriphInc = DMA_PINC_DISABLE;     hdma_tim2_ch2.Init.MemInc = DMA_MINC_ENABLE;     hdma_tim2_ch2.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;     hdma_tim2_ch2.Init.MemDataAlignment = DMA_PDATAALIGN_WORD;     hdma_tim2_ch2.Init.Mode = DMA_NORMAL;     hdma_tim2_ch2.Init.Priority = DMA_PRIORITY_MEDIUM;     hdma_tim2_ch2.Init.FIFOMode = DMA_FIFOMODE_DISABLE;     if (HAL_DMA_Init(&hdma_tim2_ch2) != HAL_OK)     {       Error_Handler();     }     __HAL_LINKDMA(tim_pwmHandle,hdma[TIM_DMA_ID_CC2],hdma_tim2_ch2);     /* TIM2_CH3 Init */     hdma_tim2_ch3.Instance = DMA1_Stream1;     hdma_tim2_ch3.Init.Request = DMA_REQUEST_TIM2_CH3;     hdma_tim2_ch3.Init.Direction = DMA_MEMORY_TO_PERIPH;     hdma_tim2_ch3.Init.PeriphInc = DMA_PINC_DISABLE;     hdma_tim2_ch3.Init.MemInc = DMA_MINC_ENABLE;     hdma_tim2_ch3.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;     hdma_tim2_ch3.Init.MemDataAlignment = DMA_PDATAALIGN_WORD;     hdma_tim2_ch3.Init.Mode = DMA_NORMAL;     hdma_tim2_ch3.Init.Priority = DMA_PRIORITY_MEDIUM;     hdma_tim2_ch3.Init.FIFOMode = DMA_FIFOMODE_DISABLE;     if (HAL_DMA_Init(&hdma_tim2_ch3) != HAL_OK)     {       Error_Handler();     }     __HAL_LINKDMA(tim_pwmHandle,hdma[TIM_DMA_ID_CC3],hdma_tim2_ch3);   } } void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle) {   GPIO_InitTypeDef GPIO_InitStruct = {0};   if(timHandle->Instance==TIM2)   {       __HAL_RCC_GPIOA_CLK_ENABLE();     /**TIM2 GPIO Configuration        PA1     ------> TIM2_CH2     PA2     ------> TIM2_CH3     */     GPIO_InitStruct.Pin = GPIO_PIN_1|GPIO_PIN_2;     GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;     GPIO_InitStruct.Pull = GPIO_NOPULL;     GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;     GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;     HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);   } } void HAL_TIM_PWM_MspDeInit(TIM_HandleTypeDef* tim_pwmHandle) {   if(tim_pwmHandle->Instance==TIM2)   {     __HAL_RCC_TIM2_CLK_DISABLE();     HAL_DMA_DeInit(tim_pwmHandle->hdma[TIM_DMA_ID_CC2]);     HAL_DMA_DeInit(tim_pwmHandle->hdma[TIM_DMA_ID_CC3]);   } } 主函数代码： uint32_t M_Pix[24]__attribute__((section(".ARM.__at_0x24000000")))={249,244,240,230,220,210,200,190,180,170,160,150,140,130,120,110,100,90,80,70,60,50,40,30}; int main(void) {   Cache_Enable();   SystemClock_Config();   HAL_Init();     MPU_Init();   MX_GPIO_Init();   while (1)   {   HAL_TIM_PWM_Start_DMA(&htim2, TIM_CHANNEL_3, (uint32_t *)M_Pix, 23);     if(__HAL_DMA_GET_FLAG(&htim2,DMA_FLAG_TCIF1_5))     {      __HAL_DMA_CLEAR_FLAG(&htim2,DMA_FLAG_TCIF1_5);       HAL_TIM_PWM_Stop_DMA(&htim2, TIM_CHANNEL_3);     }     HAL_Delay(1000);   } }