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

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# 修改代码
# l. T$ G! K. E9 \: K1 |    static void MX_LPTIM3_Init(void)
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    /* USER CODE BEGIN LPTIM3_Init 0 */

    /* USER CODE END LPTIM3_Init 0 */

' G. j! H, J6 J    /* USER CODE BEGIN LPTIM3_Init 1 */

6 [$ Q0 \) l; {0 n+ `    /* USER CODE END LPTIM3_Init 1 */
    hlptim3.Instance = LPTIM3;
    hlptim3.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC;
    hlptim3.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV128;
7 c$ d: i" B7 r" {- c8 y% {+ X    hlptim3.Init.Trigger.Source = LPTIM_TRIGSOURCE_SOFTWARE;
    hlptim3.Init.Period = 65535;
6 j) c4 K1 n, z7 q$ t    hlptim3.Init.UpdateMode = LPTIM_UPDATE_IMMEDIATE;
    hlptim3.Init.CounterSource = LPTIM_COUNTERSOURCE_INTERNAL;
. u* i" S5 u- q1 i" o3 X; a% k5 V    hlptim3.Init.Input1Source = LPTIM_INPUT1SOURCE_GPIO;
) C0 z1 h) P$ N  Y4 Q) F) U    hlptim3.Init.Input2Source = LPTIM_INPUT2SOURCE_GPIO;
  d0 P; B- t/ n    hlptim3.Init.RepetitionCounter = 0;
, M2 ?5 A3 u) d8 R    if (HAL_LPTIM_Init(&hlptim3) != HAL_OK)
2 ]  O8 T+ {+ v/ X    {
3 G* ?' D" v+ Y7 f0 C        Error_Handler();
( L, U# m0 v' Q; Q' m    }
9 d& w# b- I$ A2 z2 M    /* USER CODE BEGIN LPTIM3_Init 2 */
$ }5 _; W5 q- F/ l    HAL_LPTIM_Counter_Start_IT(&hlptim3);//添加启动低功耗定时器
- v4 R5 i& n( S2 j1 x    /* USER CODE END LPTIM3_Init 2 */

    }
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: i( ?& Q+ e5 v0 f! T    while (1)
    {

% h. L" o/ m. X  N: K$ N        /* -- Sample board code for User push-button in interrupt mode ---- */
- |8 p  D0 Q9 z        if (BspButtonState == BUTTON_PRESSED)
        {
        /* Update button state */
        BspButtonState = BUTTON_RELEASED;
        /* -- Sample board code to toggle leds ---- */
        BSP_LED_Toggle(LED_GREEN);
9 v$ x8 H4 f( \: Y8 g/ G1 \        /* ..... Perform your action ..... */
/ G9 w7 i  B, F  J! w, q+ H1 J7 j) v        }
        HAL_SuspendTick();//添加进入休眠，以及串口打印命令
        printf("\r\n Enter sleep mode! \r\n");
1 P# s5 X- b* A& K0 P$ S, l        BSP_LED_Off(LED_GREEN);
        HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
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        /* USER CODE END WHILE */

* ^& i$ P1 o2 w$ G, c" r. P        /* USER CODE BEGIN 3 */
6 F/ O3 O% S2 s- |" B& O% o5 d4 t    }

    /* 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();
* e$ O( q, \% t5 ^, r8 y- c6 j# v        BSP_LED_On(LED_GREEN);
6 |  N. W. c. [- W4 U- f' o; f) u        printf("\r\n Exit sleep mode ! \r\n");
9 U) q0 w2 t6 @' W1 Z    }
+ o" i& [0 I1 R    /* USER CODE END 0 */
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