使用定时器DMA做比较输出PWM，输出波形第一次不正确问题求助

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