【NUCLEO-U083RC评测】低功耗定时器及休眠唤醒

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埃斯提爱慕发布时间：2024-5-24 19:12

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文章简介:	【NUCLEO-U083RC评测】低功耗定时器及休眠唤醒

# 工程创建参考：https://shequ.stmicroelectronics ... p;extra=#pid2657071

# CubeMX配置工程

![alt text](image.png)

![alt text](image-1.png)

# 修改代码
static void MX_LPTIM3_Init(void)
{

/* USER CODE BEGIN LPTIM3_Init 0 */

/* USER CODE END LPTIM3_Init 0 */

/* USER CODE BEGIN LPTIM3_Init 1 */

/* USER CODE END LPTIM3_Init 1 */
hlptim3.Instance = LPTIM3;
hlptim3.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC;
hlptim3.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV128;
hlptim3.Init.Trigger.Source = LPTIM_TRIGSOURCE_SOFTWARE;
hlptim3.Init.Period = 65535;
hlptim3.Init.UpdateMode = LPTIM_UPDATE_IMMEDIATE;
hlptim3.Init.CounterSource = LPTIM_COUNTERSOURCE_INTERNAL;
hlptim3.Init.Input1Source = LPTIM_INPUT1SOURCE_GPIO;
hlptim3.Init.Input2Source = LPTIM_INPUT2SOURCE_GPIO;
hlptim3.Init.RepetitionCounter = 0;
if (HAL_LPTIM_Init(&hlptim3) != HAL_OK)
{
      Error_Handler();
}
/* USER CODE BEGIN LPTIM3_Init 2 */
HAL_LPTIM_Counter_Start_IT(&hlptim3);//添加启动低功耗定时器
/* USER CODE END LPTIM3_Init 2 */

}

while (1)
{

      /* -- Sample board code for User push-button in interrupt mode ---- */
      if (BspButtonState == BUTTON_PRESSED)
      {
      /* Update button state */
      BspButtonState = BUTTON_RELEASED;
      /* -- Sample board code to toggle leds ---- */
      BSP_LED_Toggle(LED_GREEN);
      /* ..... Perform your action ..... */
      }
      HAL_SuspendTick();//添加进入休眠，以及串口打印命令
      printf("\r\n Enter sleep mode! \r\n");
      BSP_LED_Off(LED_GREEN);
      HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);

      /* USER CODE END WHILE */

      /* USER CODE BEGIN 3 */
}

/* USER CODE BEGIN 0 */
void HAL_LPTIM_UpdateEventCallback(LPTIM_HandleTypeDef *hlptim)
{//添加回调函数、唤西醒并打印提示
      HAL_ResumeTick();
      BSP_LED_On(LED_GREEN);
      printf("\r\n Exit sleep mode ! \r\n");
}
/* USER CODE END 0 */

# 下载运行，看效果