stm32 HAL库学习笔记8——定时器中断

环境
CubeMX设置
CubeMX生成的代码
添加的代码

TOC

环境

• 开发板：stm32F407ZG EXPLORER
• STM32CubeMX: Version 6.1.0

CubeMX设置

Clock Source(时钟来源)

• 选项1 ：Internal Clock 内部时钟
• 选项2 ： ETR2 外部触发输入(ETR)(仅适用TIM2,3,4)

定时器溢出时间：

$$Tout=\frac{(arr+1)\ast (psc+1)}{Tclk}$$

这里arr=5000-1; psc=7200-1; Tclk=72MHz;
Tout = (5000*7200)/72 us = 500ms

• 中断设置

CubeMX生成的代码

• 使能定时器中断

  /* USER CODE BEGIN 2 */
  HAL_TIM_Base_Start_IT(&htim3);
  /* USER CODE END 2 */

• 定时器初使化

/**
  * @brief TIM3 Initialization Function
  * @param None
  * @retval None
  */
static void MX_TIM3_Init(void)
{

  /* USER CODE BEGIN TIM3_Init 0 */

  /* USER CODE END TIM3_Init 0 */

  TIM_ClockConfigTypeDef sClockSourceConfig = {0};
  TIM_MasterConfigTypeDef sMasterConfig = {0};

  /* USER CODE BEGIN TIM3_Init 1 */

  /* USER CODE END TIM3_Init 1 */
  htim3.Instance = TIM3;
  htim3.Init.Prescaler = 7200-1;
  htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim3.Init.Period = 5000-1;
  htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim3.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
  if (HAL_TIM_Base_Init(&htim3) != HAL_OK)
  {
    Error_Handler();
  }
  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  if (HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN TIM3_Init 2 */

  /* USER CODE END TIM3_Init 2 */

}

添加的代码

/* USER CODE BEGIN 4 */
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
  if (htim->Instance == TIM3)
  {
    HAL_GPIO_TogglePin(GPIOF, GPIO_PIN_9);
  }
}
/* USER CODE END 4 */