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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); |
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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);