STM32物联网项目-低功耗模式

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</div><div>/* Low Power modes configuration functions ************************************/</div>void HAL_PWR_EnterSTOPMode(uint32_t Regulator, uint8_t STOPEntry);        //进入停止模式

void HAL_PWR_EnterSLEEPMode(uint32_t Regulator, uint8_t SLEEPEntry);    //进入睡眠模式

void HAL_PWR_EnterSTANDBYMode(void);                                //进入停机模式

/*

* [url=home.php?mod=space&uid=139335]@name[/url]   Enter_Sleep_Mode

* [url=home.php?mod=space&uid=247401]@brief[/url]  进入睡眠模式

* @param  None

* @retval None

*/

static void Enter_Sleep_Mode()

{

    /*注意：任一中断都可以将系统从睡眠模式中唤醒*/



    //需要先关闭Systick和定时器6的中断，否则进入睡眠模式后立马被唤醒

    HAL_SuspendTick();              //停止Systick中断

    HAL_TIM_Base_Stop_IT(&htim6);   //停止定时器6中断



    //关闭外部中断0至2，只允许触摸按键4外部中断退出睡眠模式

    HAL_NVIC_DisableIRQ(EXTI0_IRQn);

    HAL_NVIC_DisableIRQ(EXTI1_IRQn);

    HAL_NVIC_DisableIRQ(EXTI2_IRQn);



    //以WFI进入睡眠模式，可以被任一中断唤醒

    HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON,PWR_SLEEPENTRY_WFI);



    //恢复中断

    HAL_ResumeTick();               //恢复Systick中断

    HAL_TIM_Base_Start_IT(&htim6);  //恢复定时器6中断



    //恢复外部中断0至2

    HAL_NVIC_EnableIRQ(EXTI0_IRQn);

    HAL_NVIC_EnableIRQ(EXTI1_IRQn);

    HAL_NVIC_EnableIRQ(EXTI2_IRQn);

}

/**

  * @brief Enters Sleep mode.

  * [url=home.php?mod=space&uid=536309]@NOTE[/url]  In Sleep mode, all I/O pins keep the same state as in Run mode.

  * @param Regulator: Regulator state as no effect in SLEEP mode -  allows to support portability from legacy software

  * @param SLEEPEntry: Specifies if SLEEP mode is entered with WFI or WFE instruction.

  *           When WFI entry is used, tick interrupt have to be disabled if not desired as 

  *           the interrupt wake up source.

  *           This parameter can be one of the following values:

  *            [url=home.php?mod=space&uid=2817080]@ARG[/url] PWR_SLEEPENTRY_WFI: enter SLEEP mode with WFI instruction

  *            @arg PWR_SLEEPENTRY_WFE: enter SLEEP mode with WFE instruction

  * @retval None

  */

void HAL_PWR_EnterSLEEPMode(uint32_t Regulator, uint8_t SLEEPEntry)

{

  /* Check the parameters */

  /* No check on Regulator because parameter not used in SLEEP mode */

  /* Prevent unused argument(s) compilation warning */

  UNUSED(Regulator);



  assert_param(IS_PWR_SLEEP_ENTRY(SLEEPEntry));

  ........

}

/*

* @name   Enter_Stop_Mode

* @brief  进入停机模式

* @param  None

* @retval None

*/

static void Enter_Stop_Mode()

{

    /*注意：外部中断可以将系统从停机模式中唤醒*/



    //关闭外部中断0至2，只允许触摸按键4外部中断退出停止模式

    HAL_NVIC_DisableIRQ(EXTI0_IRQn);

    HAL_NVIC_DisableIRQ(EXTI1_IRQn);

    HAL_NVIC_DisableIRQ(EXTI2_IRQn);



    //以WFI、电压调节器低功耗模式进入停机模式

    HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON,PWR_STOPENTRY_WFI);



    //退出停机模式时，HSI RC振荡器被选为系统时钟

    //重新选择系统时钟为HSE

    SystemClock_Config();

    //开启外部中断

    HAL_NVIC_EnableIRQ(EXTI0_IRQn);

    HAL_NVIC_EnableIRQ(EXTI1_IRQn);

    HAL_NVIC_EnableIRQ(EXTI2_IRQn);

}