STM32CubeMX之定时器PWM输出

/* TIM4 init function */

void MX_TIM4_Init(void)

{

  TIM_ClockConfigTypeDef sClockSourceConfig = {0};

  TIM_MasterConfigTypeDef sMasterConfig = {0};

  TIM_OC_InitTypeDef sConfigOC = {0};



  htim4.Instance = TIM4;//定时器4

  htim4.Init.Prescaler = 72-1;//分频系数72分频

  htim4.Init.CounterMode = TIM_COUNTERMODE_UP;//向上计数方式

  htim4.Init.Period = 300;//重装装载值

  htim4.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;//无时钟分频

  htim4.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;//自动重装载预装载使能

  if (HAL_TIM_Base_Init(&htim4) != HAL_OK)//初始化定时器

  {

    Error_Handler();

  }

  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;

  if (HAL_TIM_ConfigClockSource(&htim4, &sClockSourceConfig) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_TIM_PWM_Init(&htim4) != HAL_OK)

  {

    Error_Handler();

  }

  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;

  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;

  if (HAL_TIMEx_MasterConfigSynchronization(&htim4, &sMasterConfig) != HAL_OK)

  {

    Error_Handler();

  }

  sConfigOC.OCMode = TIM_OCMODE_PWM1;//PWM模式1，CNT<CCR为有效电平

  sConfigOC.Pulse = 0;//占空比

  sConfigOC.OCPolarity = TIM_OCPOLARITY_LOW;//有效电平时间

  sConfigOC.OCFastMode = TIM_OCFAST_ENABLE;//快速比较使能

  if (HAL_TIM_PWM_ConfigChannel(&htim4, &sConfigOC, TIM_CHANNEL_3) != HAL_OK)//PWM模式初始化

  {

    Error_Handler();

  }

  if (HAL_TIM_PWM_ConfigChannel(&htim4, &sConfigOC, TIM_CHANNEL_4) != HAL_OK)

  {

    Error_Handler();

  }

  HAL_TIM_MspPostInit(&htim4);//硬件层初始户化



}

void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle)

{



  GPIO_InitTypeDef GPIO_InitStruct = {0};

  if(timHandle->Instance==TIM4)

  {

  /* USER CODE BEGIN TIM4_MspPostInit 0 */



  /* USER CODE END TIM4_MspPostInit 0 */



    __HAL_RCC_GPIOB_CLK_ENABLE();

    /**TIM4 GPIO Configuration

    PB8     ------> TIM4_CH3

    PB9     ------> TIM4_CH4

    */

    GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9;

    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);



  /* USER CODE BEGIN TIM4_MspPostInit 1 */

  HAL_TIM_PWM_Start(timHandle,TIM_CHANNEL_3);//启动通道3

  HAL_TIM_PWM_Start(timHandle,TIM_CHANNEL_4);//启动通道4

  /* USER CODE END TIM4_MspPostInit 1 */

  }

}

/*硬件层初始化:时钟、中断，DMA*/

void HAL_TIM_Base_MspInit(TIM_HandleTypeDef *htim);

/*中断方式开启定时器*/

HAL_StatusTypeDef HAL_TIM_Base_Start_IT(TIM_HandleTypeDef *htim);

/*DMA方式开启定时器*/

HAL_StatusTypeDef HAL_TIM_Base_Start_DMA(TIM_HandleTypeDef *htim, uint32_t *pData, uint16_t Length);

/*开启定时器PWM模式*/

HAL_StatusTypeDef HAL_TIM_PWM_Start(TIM_HandleTypeDef *htim, uint32_t Channel);



/*获取状态*/

HAL_TIM_StateTypeDef HAL_TIM_Base_GetState(TIM_HandleTypeDef *htim);

/*中断方式开启定时器输入捕获功能*/

HAL_StatusTypeDef HAL_TIM_IC_Start_IT(TIM_HandleTypeDef *htim, uint32_t Channel)