; a# b" }' [, e9 M+ H) X# 工程创建参考：https://shequ.stmicroelectronics ... p;extra=#pid2657071

# CubeMX配置工程
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' Y1 ?0 ]! K4 Y# 修改代码
    static void MX_LPTIM3_Init(void)
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1 O  I) O" Z% u2 @5 B& [) \    /* USER CODE BEGIN LPTIM3_Init 0 */
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: j( T  s# s: B: ?. ]7 {    /* USER CODE END LPTIM3_Init 0 */
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    /* USER CODE BEGIN LPTIM3_Init 1 */
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2 o/ d5 y" D2 U6 g2 ^. z    /* USER CODE END LPTIM3_Init 1 */
    hlptim3.Instance = LPTIM3;
; [- ]$ _" H" o( |2 S7 U    hlptim3.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC;
! m$ ]- q! e) O( k3 c    hlptim3.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV128;
    hlptim3.Init.Trigger.Source = LPTIM_TRIGSOURCE_SOFTWARE;
: f( t- w. _! C6 u1 h    hlptim3.Init.Period = 65535;
5 [! k/ R( S+ q  t1 D    hlptim3.Init.UpdateMode = LPTIM_UPDATE_IMMEDIATE;
7 O( l: m# j1 x% J. p: _+ b    hlptim3.Init.CounterSource = LPTIM_COUNTERSOURCE_INTERNAL;
    hlptim3.Init.Input1Source = LPTIM_INPUT1SOURCE_GPIO;
) x& Q  k% @) ~5 W  y    hlptim3.Init.Input2Source = LPTIM_INPUT2SOURCE_GPIO;
0 L0 W' Z+ ?- f& ?3 _* s    hlptim3.Init.RepetitionCounter = 0;
- V0 }" g' ?3 I# Z/ c+ m5 p5 S- D    if (HAL_LPTIM_Init(&hlptim3) != HAL_OK)
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        Error_Handler();
7 v% u) c  Y# r3 W    }
    /* USER CODE BEGIN LPTIM3_Init 2 */
+ H; j' k& @, o2 m; r2 R    HAL_LPTIM_Counter_Start_IT(&hlptim3);//添加启动低功耗定时器
: Y" N' A9 p5 B' J8 \- H    /* USER CODE END LPTIM3_Init 2 */

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5 W( P" E- x- h- ?* D    while (1)
    {

$ p8 Q# u" B6 ]+ x; Z        /* -- Sample board code for User push-button in interrupt mode ---- */
3 q& a$ ?2 ?' Z2 {        if (BspButtonState == BUTTON_PRESSED)
        {
        /* Update button state */
8 x; O" [: f7 i6 H2 P4 B/ ]' S! A        BspButtonState = BUTTON_RELEASED;
        /* -- Sample board code to toggle leds ---- */
        BSP_LED_Toggle(LED_GREEN);
8 n* b& L9 [+ D* {* o        /* ..... Perform your action ..... */
& C. M6 c  w2 N% E' q" \7 q        }
/ S6 p4 j. K2 {8 ^        HAL_SuspendTick();//添加进入休眠，以及串口打印命令
3 p1 I8 r; m4 L2 ~        printf("\r\n Enter sleep mode! \r\n");
        BSP_LED_Off(LED_GREEN);
        HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
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% }$ G8 p3 u3 s6 N% t" J) U        /* USER CODE END WHILE */

. K% D3 C' {" Z$ D4 y/ }& c8 H        /* USER CODE BEGIN 3 */
) y$ `7 B) w7 }    }

    /* USER CODE BEGIN 0 */
    void HAL_LPTIM_UpdateEventCallback(LPTIM_HandleTypeDef *hlptim)
) z! [2 N* E* u    {//添加回调函数、唤西醒并打印提示
        HAL_ResumeTick();
        BSP_LED_On(LED_GREEN);
: M( u( @4 M3 e7 f        printf("\r\n Exit sleep mode ! \r\n");
    }
    /* USER CODE END 0 */

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