) v! |9 ~' L0 x( m* {0 {# 工程创建参考：https://shequ.stmicroelectronics ... p;extra=#pid2657071

# CubeMX配置工程
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+ z2 R$ K) `6 J& W# 修改代码
    static void MX_LPTIM3_Init(void)
    {
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% c& {  U; @. i    /* USER CODE BEGIN LPTIM3_Init 0 */
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3 `7 I) T$ U3 {. g+ l+ f: l    /* USER CODE END LPTIM3_Init 0 */
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6 E1 h" T5 t% l  y! I    /* USER CODE BEGIN LPTIM3_Init 1 */

4 D6 [* N' ~" k, f- P# b. K* g# X1 `$ g    /* USER CODE END LPTIM3_Init 1 */
    hlptim3.Instance = LPTIM3;
    hlptim3.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC;
& _* g8 c2 i' K. D/ x    hlptim3.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV128;
    hlptim3.Init.Trigger.Source = LPTIM_TRIGSOURCE_SOFTWARE;
, c4 i- f2 u2 |  J. m2 |    hlptim3.Init.Period = 65535;
! o1 y' C6 m* f. W9 X    hlptim3.Init.UpdateMode = LPTIM_UPDATE_IMMEDIATE;
    hlptim3.Init.CounterSource = LPTIM_COUNTERSOURCE_INTERNAL;
8 K3 j; d6 E$ {    hlptim3.Init.Input1Source = LPTIM_INPUT1SOURCE_GPIO;
' C: w! e9 {/ H, n    hlptim3.Init.Input2Source = LPTIM_INPUT2SOURCE_GPIO;
    hlptim3.Init.RepetitionCounter = 0;
! t5 _+ k0 o+ H) T: T  |! o    if (HAL_LPTIM_Init(&hlptim3) != HAL_OK)
, z! a) N5 X4 c/ G% r/ J, p( a' e8 S    {
        Error_Handler();
3 V2 y5 ^+ J' Z; P" E7 I    }
    /* USER CODE BEGIN LPTIM3_Init 2 */
    HAL_LPTIM_Counter_Start_IT(&hlptim3);//添加启动低功耗定时器
, v0 _0 q" k) t) t/ O" P    /* USER CODE END LPTIM3_Init 2 */

; L. U, e" r4 z7 i' c6 A- n4 c    }


    while (1)
& W; V7 x- S+ U2 O+ T$ ]    {
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9 x* |# U% x0 w        /* -- Sample board code for User push-button in interrupt mode ---- */
        if (BspButtonState == BUTTON_PRESSED)
& q0 u3 |) v) C2 I        {
        /* Update button state */
$ S1 m: P2 [4 Q# c. f/ m; G- J        BspButtonState = BUTTON_RELEASED;
        /* -- Sample board code to toggle leds ---- */
' c- S' l4 q/ n( m        BSP_LED_Toggle(LED_GREEN);
7 O7 K* m! P  o) n, U$ e0 h        /* ..... Perform your action ..... */
' B# i( _6 x" C' P! J! M        }
5 B5 c1 J2 \% D2 h% \' @% L+ x        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);
; G; a9 V8 D7 D- i8 Y( o        HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
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        /* USER CODE END WHILE */
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        /* USER CODE BEGIN 3 */
    }
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    /* USER CODE BEGIN 0 */
6 E. B2 n6 @: ?" C" _8 L    void HAL_LPTIM_UpdateEventCallback(LPTIM_HandleTypeDef *hlptim)
    {//添加回调函数、唤西醒并打印提示
7 Y9 p; O$ d# j8 p        HAL_ResumeTick();
        BSP_LED_On(LED_GREEN);
        printf("\r\n Exit sleep mode ! \r\n");
; o5 p" ^8 M6 s! ^0 D- O0 o( g6 ~    }
& _/ ~: V- r; M7 ~    /* USER CODE END 0 */
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3 H4 K6 {! x6 s9 S* W6 Q  ^# 下载运行，看效果
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