低功耗模式代码RTC唤醒

/*
*********************************************************
** Filename: stop_mode.c
** Abstract: 使用STM32L151C8T6MCU，使用RTC唤醒STOP和STANDBY模式下的低功耗,低功耗时长可以人为的进行设置
**                设置低功耗时长时请参考头文件中关于时长的宏定义
** 使用注意事项：使用CubeMX生成函数时，在main()函数后会自动生成SystemClock_Config()函数，此程序中调用了该函数。
**                如果该函数在其他文件中，请将该.h文件加入，以免发生错误；
** Date : 2018-01-04 
** Author:王翔武
*********************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "pwr_mode_rtc.h"
#include "main.h"
RTC_HandleTypeDef RTCHandle;    //RTC结构体变量    
//进入STOP模式低功耗，使用RTC功能唤醒，其中stoptime单位为S，如设置1，低功耗1秒后唤醒
void enter_stop_rtc(float stoptime)
{
    uint32_t i;        //局部变量，用于计算低功耗时长
    system_power_config();
    /* Disable Wakeup Counter */
    HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle);
    /*To configure the wake up timer to 4s the WakeUpCounter is set to 0x242B:
    RTC_WAKEUPCLOCK_RTCCLK_DIV = RTCCLK_Div16 = 16 
    Wakeup Time Base = 16 /(~37KHz) = ~0,432 ms
    Wakeup Time = ~5s = 0,432ms  * WakeUpCounter
    ==> WakeUpCounter = ~5s/0,432ms = 11562 */
    i = stoptime*2396;
    HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, i, RTC_WAKEUPCLOCK_RTCCLK_DIV16);
    /* Enter Stop Mode */
    HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
    SystemClock_Config();
}
//进入STANDBY模式低功耗，使用RTC功能唤醒，其中standbytime单位为S，如设置1，低功耗1秒后唤醒
void enter_standby_rtc(float standbytime)
{
    uint32_t i;        //局部变量，用于计算低功耗时长
    system_power_config();
    if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
    {
        /* Clear Standby flag */
        __HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB); 
    }
    /* Disable Wakeup Counter */
    HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle);
    /*To configure the wake up timer to 4s the WakeUpCounter is set to 0x242B:
    RTC_WAKEUPCLOCK_RTCCLK_DIV = RTCCLK_Div16 = 16 
    Wakeup Time Base = 16 /(~37KHz) = ~0,432 ms
    Wakeup Time = ~5s = 0,432ms  * WakeUpCounter
    ==> WakeUpCounter = ~5s/0,432ms = 11562 */
    i = standbytime*2396;
    HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, i, RTC_WAKEUPCLOCK_RTCCLK_DIV16);
    /* Clear all related wakeup flags */
    __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
     /* Enter the Standby mode */
    HAL_PWR_EnterSTANDBYMode();
}
//进入SLEEP模式低功耗，使用RTC功能唤醒，其中sleeptime单位为S，如设置1，低功耗1秒后唤醒
void enter_sleep_rtc(float sleeptime)
{
    uint32_t i;        //局部变量，用于计算低功耗时长
    system_power_config();
    /* Disable Wakeup Counter */
    HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle);
    /*To configure the wake up timer to 4s the WakeUpCounter is set to 0x242B:
    RTC_WAKEUPCLOCK_RTCCLK_DIV = RTCCLK_Div16 = 16 
    Wakeup Time Base = 16 /(~37KHz) = ~0,432 ms
    Wakeup Time = ~5s = 0,432ms  * WakeUpCounter
    ==> WakeUpCounter = ~5s/0,432ms = 11562 */
    i = sleeptime*2396;
    HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, i, RTC_WAKEUPCLOCK_RTCCLK_DIV16);
    /*Suspend Tick increment to prevent wakeup by Systick interrupt. 
    Otherwise the Systick interrupt will wake up the device within 1ms (HAL time base)*/
    HAL_SuspendTick();
    /* Enter Sleep Mode , wake up is done once Key push button is pressed */
    HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
    /* Resume Tick interrupt if disabled prior to sleep mode entry*/
    HAL_ResumeTick();
}
//低功耗关闭项
void system_power_config(void)
{
    GPIO_InitTypeDef GPIO_InitStructure = {0};
    /* Enable Power Control clock */
    __HAL_RCC_PWR_CLK_ENABLE();
    /* Enable Ultra low power mode */
    HAL_PWREx_EnableUltraLowPower();
    /* Enable the fast wake up from Ultra low power mode */
    HAL_PWREx_EnableFastWakeUp();
    /* Enable GPIOs clock */
    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();
    __HAL_RCC_GPIOC_CLK_ENABLE();
    __HAL_RCC_GPIOD_CLK_ENABLE();
    __HAL_RCC_GPIOH_CLK_ENABLE();
    __HAL_RCC_GPIOE_CLK_ENABLE();
    /* Configure all GPIO port pins in Analog Input mode (floating input trigger OFF) */
    /* Note: Debug using ST-Link is not possible during the execution of this   */
    /*       example because communication between ST-link and the device       */
    /*       under test is done through UART. All GPIO pins are disabled (set   */
    /*       to analog input mode) including  UART I/O pins.           */
    GPIO_InitStructure.Pin = GPIO_PIN_All;
    GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStructure.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStructure); 
    HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
    HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
    HAL_GPIO_Init(GPIOD, &GPIO_InitStructure);
    HAL_GPIO_Init(GPIOH, &GPIO_InitStructure);
    HAL_GPIO_Init(GPIOE, &GPIO_InitStructure);
    /* Disable GPIOs clock */
    __HAL_RCC_GPIOA_CLK_DISABLE();
    __HAL_RCC_GPIOB_CLK_DISABLE();
    __HAL_RCC_GPIOC_CLK_DISABLE();
    __HAL_RCC_GPIOD_CLK_DISABLE();
    __HAL_RCC_GPIOH_CLK_DISABLE();
    __HAL_RCC_GPIOE_CLK_DISABLE();
    /* Configure RTC */
    RTCHandle.Instance = RTC;
    /* Configure RTC prescaler and RTC data registers as follow:
    - Hour Format = Format 24
    - Asynch Prediv = Value according to source clock
    - Synch Prediv = Value according to source clock
    - OutPut = Output Disable
    - OutPutPolarity = High Polarity
    - OutPutType = Open Drain */
    RTCHandle.Init.HourFormat = RTC_HOURFORMAT_24;
    RTCHandle.Init.AsynchPrediv = 0x7C;
    RTCHandle.Init.SynchPrediv = 0x0127;
    RTCHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
    RTCHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
    RTCHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
    if(HAL_RTC_Init(&RTCHandle) != HAL_OK)
    {
        /* Initialization Error */
        Error_Handler(); 
    }
}
/************************ Johnking *****END OF FILE****/

#ifndef __stop_mode_rtc_H
#define __stop_mode_rtc_H
/* Includes ------------------------------------------------------------------*/
#include "stm32l1xx_hal.h"
void enter_stop_rtc(float stoptime);
void enter_standby_rtc(float standbytime);
void enter_sleep_rtc(float sleeptime);
void system_power_config(void);
void system_clock_config(void);
#endif
/************************ Johnking *****END OF FILE****/