我使用STM32F103VET6单片机做主控，现在想要做两路PWM信号输出，两路的PWM需要有一定的相位差，并要求输出的占空比可调，所以我想到了定时器的比较输出功能，我现在是使用到了定时器2的两路输出，第二路使用PWM输出的方式，第一路的相位差想到了用DMA方式，我在程序烧录进硬件电路后示波器观察波形，DMA输出的一个信号没有输出，而且第二路输出也没有相位差，从第三个信号开始按照我的设计思路正常执行了，我想求助下我DMA配置是哪里出现了问题
uint32_t Data_Pwm[]={2000,19998,0};
uint32_t Data_Pwm1[] = {300,5};
void MX_TIM2_Init(void)
{

  /* USER CODE BEGIN TIM2_Init 0 */

  /* USER CODE END TIM2_Init 0 */

  TIM_ClockConfigTypeDef sClockSourceConfig = {0};
  TIM_MasterConfigTypeDef sMasterConfig = {0};
  TIM_OC_InitTypeDef sConfigOC = {0};
  TIM_IC_InitTypeDef sConfigIC = {0};

  /* USER CODE BEGIN TIM2_Init 1 */

  /* USER CODE END TIM2_Init 1 */
  htim2.Instance = TIM2;
  htim2.Init.Prescaler = 35;
  htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim2.Init.Period = 20000;
  htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
  if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
  {
    Error_Handler(__FILE__, __LINE__);
  }
  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
  {
    Error_Handler(__FILE__, __LINE__);
  }
  if (HAL_TIM_OC_Init(&htim2) != HAL_OK)
  {
    Error_Handler(__FILE__, __LINE__);
  }
  if (HAL_TIM_PWM_Init(&htim2) != HAL_OK)
  {
    Error_Handler(__FILE__, __LINE__);
  }
  if (HAL_TIM_IC_Init(&htim2) != HAL_OK)
  {
    Error_Handler(__FILE__, __LINE__);
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
  {
    Error_Handler(__FILE__, __LINE__);
  }
  sConfigOC.OCMode = TIM_OCMODE_TOGGLE;
  sConfigOC.Pulse = 0;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  if (HAL_TIM_OC_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
  {
    Error_Handler(__FILE__, __LINE__);
  }
  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 200;
        sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)
  {
    Error_Handler(__FILE__, __LINE__);
  }
  sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
  sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
  sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
  sConfigIC.ICFilter = 0;
  if (HAL_TIM_IC_ConfigChannel(&htim2, &sConfigIC, TIM_CHANNEL_3) != HAL_OK)
  {
    Error_Handler(__FILE__, __LINE__);
  }
  sConfigOC.Pulse = 1000;
        sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_4) != HAL_OK)
  {
    Error_Handler(__FILE__, __LINE__);
  }
  /* USER CODE BEGIN TIM2_Init 2 */

  /* USER CODE END TIM2_Init 2 */
  HAL_TIM_MspPostInit(&htim2);
        __HAL_TIM_DISABLE_OCxPRELOAD(&htim2,TIM_CHANNEL_1);
        __HAL_TIM_ENABLE_OCxPRELOAD(&htim2,TIM_CHANNEL_2);
        __HAL_TIM_ENABLE_OCxPRELOAD(&htim2,TIM_CHANNEL_4);
        __HAL_TIM_ENABLE_IT(&htim2, TIM_IT_CC2);
        __HAL_TIM_ENABLE_IT(&htim2, TIM_IT_CC4);
       
//        TIM_CCxChannelCmd(TIM2, TIM_CHANNEL_1,TIM_CCx_ENABLE);
//        TIM_CCxChannelCmd(TIM2, TIM_CHANNEL_2,TIM_CCx_ENABLE);
//        TIM_CCxChannelCmd(TIM2, TIM_CHANNEL_4,TIM_CCx_ENABLE);
        HAL_TIM_PWM_Start_DMA(&htim2, TIM_CHANNEL_1,Data_Pwm,2);
        //HAL_TIM_OC_Start_DMA(&htim2, TIM_CHANNEL_2,Data_Pwm1,2);
//       
        __HAL_TIM_CLEAR_IT(&htim2,TIM_IT_UPDATE);
        __HAL_TIM_ENABLE_IT(&htim2,TIM_IT_UPDATE);
       
        HAL_TIM_IC_Start_IT(&htim2,TIM_CHANNEL_3);
        HAL_TIM_PWM_Start(&htim2,TIM_CHANNEL_2);
        __HAL_TIM_ENABLE(&htim2);

uint32_t Data_Pwm[]={2000,19998,0}; uint32_t Data_Pwm1[] = {300,5}; void MX_TIM2_Init(void) {

/ USER CODE BEGIN TIM2_Init 0 /

/ USER CODE END TIM2_Init 0 /

TIM_ClockConfigTypeDef sClockSourceConfig = {0}; TIM_MasterConfigTypeDef sMasterConfig = {0}; TIM_OC_InitTypeDef sConfigOC = {0}; TIM_IC_InitTypeDef sConfigIC = {0};

/ USER CODE BEGIN TIM2_Init 1 /

/ USER CODE END TIM2_Init 1 / htim2.Instance = TIM2; htim2.Init.Prescaler = 35; htim2.Init.CounterMode = TIM_COUNTERMODE_UP; htim2.Init.Period = 20000; htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1; htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE; if (HAL_TIM_Base_Init(&htim2) != HAL_OK) { Error_Handler(FILE, LINE); } sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL; if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK) { Error_Handler(FILE, LINE); } if (HAL_TIM_OC_Init(&htim2) != HAL_OK) { Error_Handler(FILE, LINE); } if (HAL_TIM_PWM_Init(&htim2) != HAL_OK) { Error_Handler(FILE, LINE); } if (HAL_TIM_IC_Init(&htim2) != HAL_OK) { Error_Handler(FILE, LINE); } sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET; sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE; if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK) { Error_Handler(FILE, LINE); } sConfigOC.OCMode = TIM_OCMODE_TOGGLE; sConfigOC.Pulse = 0; sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH; sConfigOC.OCFastMode = TIM_OCFAST_DISABLE; if (HAL_TIM_OC_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1) != HAL_OK) { Error_Handler(FILE, LINE); } sConfigOC.OCMode = TIM_OCMODE_PWM1; sConfigOC.Pulse = 200; sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH; sConfigOC.OCFastMode = TIM_OCFAST_DISABLE; if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_2) != HAL_OK) { Error_Handler(FILE, LINE); } sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING; sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI; sConfigIC.ICPrescaler = TIM_ICPSC_DIV1; sConfigIC.ICFilter = 0; if (HAL_TIM_IC_ConfigChannel(&htim2, &sConfigIC, TIM_CHANNEL_3) != HAL_OK) { Error_Handler(FILE, LINE); } sConfigOC.Pulse = 1000; sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH; sConfigOC.OCFastMode = TIM_OCFAST_DISABLE; if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_4) != HAL_OK) { Error_Handler(FILE, LINE); } / USER CODE BEGIN TIM2_Init 2 /

/ USER CODE END TIM2_Init 2 / HAL_TIM_MspPostInit(&htim2); HAL_TIM_DISABLE_OCxPRELOAD(&htim2,TIM_CHANNEL_1); __HAL_TIM_ENABLE_OCxPRELOAD(&htim2,TIM_CHANNEL_2); HAL_TIM_ENABLE_OCxPRELOAD(&htim2,TIM_CHANNEL_4); __HAL_TIM_ENABLE_IT(&htim2, TIM_IT_CC2); __HAL_TIM_ENABLE_IT(&htim2, TIM_IT_CC4);

// TIM_CCxChannelCmd(TIM2, TIM_CHANNEL_1,TIM_CCx_ENABLE); // TIM_CCxChannelCmd(TIM2, TIM_CHANNEL_2,TIM_CCx_ENABLE); // TIM_CCxChannelCmd(TIM2, TIM_CHANNEL_4,TIM_CCx_ENABLE); HAL_TIM_PWM_Start_DMA(&htim2, TIM_CHANNEL_1,Data_Pwm,2); //HAL_TIM_OC_Start_DMA(&htim2, TIM_CHANNEL_2,Data_Pwm1,2); // __HAL_TIM_CLEAR_IT(&htim2,TIM_IT_UPDATE); __HAL_TIM_ENABLE_IT(&htim2,TIM_IT_UPDATE);

HAL_TIM_IC_Start_IT(&htim2,TIM_CHANNEL_3); HAL_TIM_PWM_Start(&htim2,TIM_CHANNEL_2); __HAL_TIM_ENABLE(&htim2);

怀疑你的第一个初始数据可能有点问题。这里有个帖子应该说就你的应用做了详细地介绍，希望帮到你。文章名字是：一个定时器实现3路时差和占空比可调的波形