lowpower.c

stm32.rar

    LCD_DisplayStringLine(Line3, "please go to the    ");
    LCD_DisplayStringLine(Line4, "calendar menu and   ");
    LCD_DisplayStringLine(Line5, "set the time and    ");
    LCD_DisplayStringLine(Line6, "date parameters.    ");
    LCD_DisplayStringLine(Line7, "Press JoyStick to   ");
    LCD_DisplayStringLine(Line8, "continue...         ");
    while(ReadKey() == NOKEY)
    {
    }
    /* Clear the LCD */
    LCD_Clear(White);
    /* Display the previous menu */
    DisplayMenu();
    /* Enable the JoyStick interrupts */
    IntExtOnOffConfig(ENABLE);
    return;
  }
  tmp = RTC_GetCounter();

  /* Save the Alarm value in the Backup register */
  BKP_WriteBackupRegister(BKP_DR6, (tmp & 0x0000FFFF));
  BKP_WriteBackupRegister(BKP_DR7, (tmp >> 16));
  
  Alarm_PreAdjust();
  LCD_ClearLine(Line8);
  LCD_DisplayStringLine(Line6, "  MCU in STOP Mode  "); 
  LCD_DisplayStringLine(Line7, " Wait For RTC Alarm ");
  
  /* Save the GPIO pins current configuration then put all GPIO pins in Analog Input mode */
  GPIO_SaveConfig();
  
  /* Request to enter STOP mode with regulator in low power */
  PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);

  /* Restore the GPIO Configurations*/
  GPIO_RestoreConfig();
  
  /* Configures system clock after wake-up from STOP: enable HSE, PLL and select PLL
     as system clock source (HSE and PLL are disabled in STOP mode) */
  SYSCLKConfig_STOP();

  LCD_DisplayStringLine(Line4, "      STOP Mode     ");
  LCD_DisplayStringLine(Line5, "Wake-Up by RTC Alarm");
  LCD_DisplayStringLine(Line6, "Press JoyStick to   ");
  LCD_DisplayStringLine(Line7, "continue...         ");

  while(ReadKey() == NOKEY)
  {
  }

  /* Clear the LCD */
  LCD_Clear(White);
  /* Display the previous menu */
  DisplayMenu();
  /* Enable the JoyStick interrupts */
  IntExtOnOffConfig(ENABLE);
}

/*******************************************************************************
* Function Name  : EnterSTANDBYMode_WAKEUP
* Description    : Enters MCU in STANDBY mode. The wake-up from STANDBY mode is 
*                  performed when a rising edge is detected on WKP_STDBY pin.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void EnterSTANDBYMode_WAKEUP(void)
{
  LCD_Clear(White);
  /* Set the LCD Back Color */
  LCD_SetBackColor(Blue);

  /* Set the LCD Text Color */
  LCD_SetTextColor(White);

  LCD_DisplayStringLine(Line7, " MCU in STANDBY Mode"); 
  LCD_DisplayStringLine(Line8, "To exit press Wakeup");

  /* Request to enter STANDBY mode (Wake Up flag is cleared in PWR_EnterSTANDBYMode function) */
  PWR_EnterSTANDBYMode();
}

/*******************************************************************************
* Function Name  : EnterSTANDBYMode_RTCAlarm
* Description    : Enters MCU in STANDBY mode. The wake-up from STANDBY mode is 
*                  performed by an RTC Alarm event.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void EnterSTANDBYMode_RTCAlarm(void)
{
  u32 tmp = 0;

  LCD_Clear(White);
  /* Set the LCD Back Color */
  LCD_SetBackColor(Blue);

  /* Set the LCD Text Color */
  LCD_SetTextColor(White);

  /* Disable the JoyStick interrupts */
  IntExtOnOffConfig(DISABLE);
  while(ReadKey() != NOKEY)
  {
  }

  if(BKP_ReadBackupRegister(BKP_DR1) != 0xA5A5)
  {
    LCD_DisplayStringLine(Line1, "Time and Date are   ");
    LCD_DisplayStringLine(Line2, "not configured,     ");
    LCD_DisplayStringLine(Line3, "please go to the    ");
    LCD_DisplayStringLine(Line4, "calendar menu and   ");
    LCD_DisplayStringLine(Line5, "set the time and    ");
    LCD_DisplayStringLine(Line6, "date parameters.    ");
    LCD_DisplayStringLine(Line7, "Press JoyStick to   ");
    LCD_DisplayStringLine(Line8, "continue...         ");
    while(ReadKey() == NOKEY)
    {
    }
    /* Clear the LCD */
    LCD_Clear(White);
    /* Display the previous menu */
    DisplayMenu();
    /* Enable the JoyStick interrupts */
    IntExtOnOffConfig(ENABLE);
    return;
  }
  
  tmp = RTC_GetCounter();

  /* Save the Alarm value in the Backup register */
  BKP_WriteBackupRegister(BKP_DR6, (tmp & 0x0000FFFF));
  BKP_WriteBackupRegister(BKP_DR7, (tmp >> 16));

  Alarm_PreAdjust();

  LCD_DisplayStringLine(Line7, " MCU in STANDBY Mode");
  LCD_DisplayStringLine(Line8, " Wait For RTC Alarm ");

  /* Request to enter STANDBY mode (Wake Up flag is cleared in PWR_EnterSTANDBYMode function) */
  PWR_EnterSTANDBYMode();
}

/*******************************************************************************
* Function Name  : Set_STOPModeStatus
* Description    : Sets STOPModeStatus variable.
* Input          : None
* Output         : STOPModeStatus
* Return         : None
*******************************************************************************/
void Set_STOPModeStatus(void)
{
  STOPModeStatus = 1;
}

/*******************************************************************************
* Function Name  : GPIO_SaveConfig
* Description    : Save all GPIOs Configurations.
* Input          : None
* Output         : GPIOA_CRL, GPIOA_CRH, GPIOB_CRL, GPIOB_CRH, GPIOC_CRL, GPIOC_CRH,
*                  GPIOD_CRL, GPIOD_CRH, GPIOE_CRL, GPIOE_CRH.  
* Return         : None
*******************************************************************************/
static void GPIO_SaveConfig(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  
  GPIOA_CRL = GPIOA->CRL;
  GPIOA_CRH = GPIOA->CRH;
  
  GPIOB_CRL = GPIOB->CRL;
  GPIOB_CRH = GPIOB->CRH;
  
  GPIOC_CRL = GPIOC->CRL;
  GPIOC_CRH = GPIOC->CRH;
  
  GPIOD_CRL = GPIOD->CRL;
  GPIOD_CRH = GPIOD->CRH;
  
  GPIOE_CRL = GPIOE->CRL;
  GPIOE_CRH = GPIOE->CRH;

  GPIOF_CRL = GPIOF->CRL;
  GPIOF_CRH = GPIOF->CRH;

  GPIOG_CRL = GPIOG->CRL;
  GPIOG_CRH = GPIOG->CRH;
  
  /* Configure all GPIO port pins in Analog Input mode (floating input trigger OFF) */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  GPIO_Init(GPIOB, &GPIO_InitStructure);
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  GPIO_Init(GPIOD, &GPIO_InitStructure);
  GPIO_Init(GPIOE, &GPIO_InitStructure);  
  GPIO_Init(GPIOF, &GPIO_InitStructure);
  GPIO_Init(GPIOG, &GPIO_InitStructure);
}

/*******************************************************************************
* Function Name  : GPIO_RestoreConfig
* Description    : Restores all GPIOs Configurations.
* Input          : None
* Output         : STOPModeStatus
* Return         : None
*******************************************************************************/
static void GPIO_RestoreConfig(void)
{  
  GPIOA->CRL = GPIOA_CRL;
  GPIOA->CRH = GPIOA_CRH;
  
  GPIOB->CRL = GPIOB_CRL;
  GPIOB->CRH = GPIOB_CRH;
  
  GPIOC->CRL = GPIOC_CRL;
  GPIOC->CRH = GPIOC_CRH;
  
  GPIOD->CRL = GPIOD_CRL;
  GPIOD->CRH = GPIOD_CRH;
  
  GPIOE->CRL = GPIOE_CRL;
  GPIOE->CRH = GPIOE_CRH;

  GPIOF->CRL = GPIOF_CRL;
  GPIOF->CRH = GPIOF_CRH; 

  GPIOG->CRL = GPIOG_CRL;
  GPIOG->CRH = GPIOG_CRH;   
}

/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/