无法在 STM32f4xx 上启用定时器中断

如何解决无法在 STM32f4xx 上启用定时器中断

我正在做一个需要定时器中断的项目。

使用 STM32cubeIDE，我生成了应该处理定时器中断的代码。这是我的 main.cpp 的截断图：（htim1 是全局句柄）

  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_TIM1_Init();

  HAL_TIM_Base_Start_IT(&htim1);
  while(1);

这里是 MX_TIM1_INIT() 的样子：

static void MX_TIM1_Init(void)
{

  /* USER CODE BEGIN TIM1_Init 0 */

  /* USER CODE END TIM1_Init 0 */

  TIM_ClockConfigTypeDef sClockSourceConfig = {0};
  TIM_MasterConfigTypeDef sMasterConfig = {0};
  TIM_OC_InitTypeDef sConfigOC = {0};
  TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = {0};

  /* USER CODE BEGIN TIM1_Init 1 */

  /* USER CODE END TIM1_Init 1 */
  htim1.Instance = TIM1;
  htim1.Init.Prescaler = 84-1;
  htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim1.Init.Period = 0xFFFF-1;
  htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim1.Init.RepetitionCounter = 0;
  htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
  if (HAL_TIM_Base_Init(&htim1) != HAL_OK)
  {
    Error_Handler();
  }
  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  if (HAL_TIM_ConfigClockSource(&htim1,&sClockSourceConfig) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_TIM_PWM_Init(&htim1) != HAL_OK)
  {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim1,&sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 0;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
  sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
  if (HAL_TIM_PWM_ConfigChannel(&htim1,&sConfigOC,TIM_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }
  sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
  sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
  sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
  sBreakDeadTimeConfig.DeadTime = 0;
  sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
  sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
  sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
  if (HAL_TIMEx_ConfigBreakDeadTime(&htim1,&sBreakDeadTimeConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN TIM1_Init 2 */

  /* USER CODE END TIM1_Init 2 */
  HAL_TIM_MspPostInit(&htim1);

}

这是我的中断处理程序的样子：

void TIM1_UP_TIM10_IRQHandler(void)
{
  /* USER CODE BEGIN TIM1_UP_TIM10_IRQn 0 */

  /* USER CODE END TIM1_UP_TIM10_IRQn 0 */
//    HAL_GPIO_TogglePin(GPIOD,GPIO_PIN_12); //O-SCOPE DEBUG on PA6
//  if (timer1 == nullptr) return;
    //timer1->TimerISR();
  HAL_TIM_IRQHandler(&htim1);
  /* USER CODE BEGIN TIM1_UP_TIM10_IRQn 1 */

  /* USER CODE END TIM1_UP_TIM10_IRQn 1 */
}

这是我的回调函数：

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) {
     HAL_GPIO_TogglePin(GPIOD,GPIO_PIN_12); //O-SCOPE DEBUG on PA6
}

无论我做什么，我都无法让调试器甚至进入处理程序......有人能告诉我我做错了什么吗？谢谢！

解决方法

我绝不会使用 HAL 库来设置计时器。这对我来说毫无意义。在下面的示例中，我将省略时钟（在我的情况下为 168MHz）和 GPIO 设置。由于您没有说明您使用的是哪种型号的 STM32F4，此代码已使用 STM32F446RET uC 进行了测试。其他 STM32F4 具有相同的定时器。

1. 设置定时器：

  __HAL_RCC_TIM1_CLK_ENABLE();

  TIM1 -> PSC = (20000 - 1);
  TIM1 -> ARR = (4200 - 1);

  //168e6 / (20000 * 4200) = 2 - two interrupts per second

  TIM1 -> EGR |= TIM_EGR_UG;  // reinitialize the counter and reload registers
  TIM1 -> DIER |= TIM_DIER_UIE;

  NVIC_EnableIRQ(TIM1_UP_TIM10_IRQn);

  TIM1 -> CR1 = TIM_CR1_CEN;

2. 中断处理程序。如果您在 C++ 处理程序中编程，则必须将其声明为 extern "C" !!!

//if you compile as C++ you need to declare handlers as "normal" C functions
//#ifdef`s are not needed if this code will never be compiled as C progream
#ifdef __cplusplus
extern "C" {
#endif

void TIM1_UP_TIM10_IRQHandler(void)
{
    if(TIM1 -> SR & TIM_SR_UIF)
    {
        TIM1 -> SR = ~(TIM_SR_UIF); // clear UIF flag
        GPIOA -> ODR ^= 1 << 5;   // toggle PA5
    }
}

#ifdef __cplusplus
}
#endif

我连接到 PA5 的 LED 每 500 毫秒改变一次状态。

工作完成 - 不是比 HAL 更容易吗？