STM32定时器DMA正常单次模式出现问题

2万 · 2022-7-26 09:00

我想通过以下函数去实现TIM2定时器一次出两个通道脉冲，一次出单个通道脉冲，我用定时6每隔10ms去重新调用一下定时器2的配置，希望出现的单通道和双通道来回切换，但是从单通道切换到双通道的时候出现的波形不对，没有实现我的延时，而且出现两个脉冲

static void MX_TIM2_Init(uint8_t Flag_out)
{

  /* USER CODE BEGIN TIM2_Init 0 */

  /* USER CODE END TIM2_Init 0 */
      if(Flag_out)
      {
            TIM_ClockConfigTypeDef sClockSourceConfig = {0};
            TIM_MasterConfigTypeDef sMasterConfig = {0};
            TIM_OC_InitTypeDef sConfigOC = {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();
            }
            sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
            if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
            {
                     Error_Handler();
            }
            if (HAL_TIM_OC_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_TOGGLE;
            sConfigOC.Pulse = Data_Pwm[1];
            sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
            sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
            if (HAL_TIM_OC_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
            {
                     Error_Handler();
            }
            sConfigOC.Pulse = Data_Pwm1[1];
            if (HAL_TIM_OC_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)
            {
                     Error_Handler();
            }
            /* 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_DISABLE_OCxPRELOAD(&htim2,TIM_CHANNEL_2);
            HAL_TIM_OC_Start_DMA(&htim2, TIM_CHANNEL_1,Data_Pwm,2);
            htim2.State = HAL_TIM_STATE_READY;
            HAL_TIM_OC_Start_DMA(&htim2, TIM_CHANNEL_2,Data_Pwm1,2);
      }
      else
      {
            TIM_ClockConfigTypeDef sClockSourceConfig = {0};
            TIM_MasterConfigTypeDef sMasterConfig = {0};
            TIM_OC_InitTypeDef sConfigOC = {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();
            }
            sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
            if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
            {
                     Error_Handler();
            }
            if (HAL_TIM_OC_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_TOGGLE;
            sConfigOC.Pulse = Data_Pwm1[1];
            sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
            sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
            if (HAL_TIM_OC_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)
            {
                     Error_Handler();
            }
            /* USER CODE BEGIN TIM2_Init 2 */

            /* USER CODE END TIM2_Init 2 */
            HAL_TIM_MspPostInit(&htim2);

            __HAL_TIM_DISABLE_OCxPRELOAD(&htim2,TIM_CHANNEL_2);
            HAL_TIM_OC_Start_DMA(&htim2, TIM_CHANNEL_2,Data_Pwm1,2);
      }

}