void initRTC()
{
mSecondsAlarm.AlarmCount = 0;
mSecondsAlarm.AlarmInterval = 0;
mSecondsAlarm.CurrentValue = 0;
mSecondsAlarm.cb_func = 0;
mMinutesAlarm.AlarmCount = 0;
mMinutesAlarm.AlarmInterval = 0;
mMinutesAlarm.CurrentValue = 0;
mMinutesAlarm.cb_func = 0;
mHoursAlarm.AlarmCount = 0;
mHoursAlarm.AlarmInterval = 0;
mHoursAlarm.CurrentValue = 0;
mHoursAlarm.cb_func = 0;
/* Enable PWR and BKP clocks */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
if (BKP_ReadBackupRegister(BKP_DR1) != 0xA5A5)
{
/* Backup data register value is not correct or not yet programmed (when
the first time the program is executed) */
t_print("Configuring RTC....\n");
RTC_Configuration();
BKP_WriteBackupRegister(BKP_DR1, 0xA5A5);
}
else
{
t_print("RTC has time....\n");
s_DateStructVar.Day = BKP_ReadBackupRegister(BKP_DR2);
s_DateStructVar.Month = BKP_ReadBackupRegister(BKP_DR3);
s_DateStructVar.Year = BKP_ReadBackupRegister(BKP_DR4);
CheckForDaysElapsed();
}
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC, ENABLE);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Enable the RTC Interrupt */
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/**
* @brief COnfiguration of RTC Registers, Selection and Enabling of
* RTC clock
* @param None
* @retval : None
*/
void RTC_Configuration()
{
uint16_t WaitForOscSource;
/*Allow access to Backup Registers*/
PWR_BackupAccessCmd(ENABLE);
BKP_RTCOutputConfig(BKP_RTCOutputSource_None);
if(READ_BKP_CONFIGURATION() != CONFIGURATION_DONE)
{
/*Enables the clock to Backup and power interface peripherals */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_BKP | RCC_APB1Periph_PWR, ENABLE);
/* Backup Domain Reset */
BKP_DeInit();
set_time(&s_DateStructVar);
set_alarm(&s_AlarmDateStructVar);
//EE_Format();
/*Enable 32.768 kHz external oscillator */
RCC_LSEConfig(RCC_LSE_ON);
for(WaitForOscSource = 0; WaitForOscSource < 5000; WaitForOscSource++);
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
/* RTC Enabled */
RCC_RTCCLKCmd(ENABLE);
RTC_WaitForLastTask();
/*Wait for RTC registers synchronisation */
RTC_WaitForSynchro();
RTC_WaitForLastTask();
/* Setting RTC Interrupts-Seconds interrupt enabled */
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC , ENABLE);
RTC_WaitForLastTask();
/* Set RTC prescaler: set RTC period to 1 sec */
RTC_SetPrescaler(32765); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) */
/* Prescaler is set to 32766 instead of 32768 to compensate for
lower as well as higher frequencies*/
RTC_WaitForLastTask();
WRITE_BKP_CONFIGURATION(CONFIGURATION_DONE);
}
else
{
/* PWR and BKP clocks selection */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
for(WaitForOscSource = 0; WaitForOscSource < 5000; WaitForOscSource++);
RTC_WaitForLastTask();
/* Enable the RTC Alarm */
RTC_ITConfig(RTC_IT_SEC, ENABLE);
RTC_WaitForLastTask();
}
/* Check if how many days are elapsed in power down/Low Power Mode-
Updates Date that many Times*/
CheckForDaysElapsed();
}
/*******************************************************************************
* Function Name : RTC_Configuration
* Description : COnfiguration of RTC Registers, Selection and Enabling of
* RTC clock
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void RTC_Configuration()
{
u16 u16_WaitForOscSource;
/*Allow access to Backup Registers*/
PWR_BackupAccessCmd(ENABLE);
if(BKP_ReadBackupRegister(BKP_DR1)==CONFIGURATION_RESET)
{
/*Enables the clock to Backup and power interface peripherals */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_BKP | RCC_APB1Periph_PWR,ENABLE);
/* Backup Domain Reset */
BKP_DeInit();
s_DateStructVar.u8_Month=DEFAULT_MONTH ;
s_DateStructVar.u8_Day=DEFAULT_DAY;
s_DateStructVar.u16_Year=DEFAULT_YEAR;
u16_SummerTimeCorrect = OCTOBER_FLAG_SET;
BKP_WriteBackupRegister(BKP_DR7,u16_SummerTimeCorrect);
BKP_WriteBackupRegister(BKP_DR2,s_DateStructVar.u8_Month);
BKP_WriteBackupRegister(BKP_DR3,s_DateStructVar.u8_Day);
BKP_WriteBackupRegister(BKP_DR4,s_DateStructVar.u16_Year);
BKP_WriteBackupRegister(BKP_DR1, CONFIGURATION_DONE);
u8_TamperNumber=0;
BKP_WriteBackupRegister(BKP_DR5,u8_TamperNumber);
/*Enable 32.768 kHz external oscillator */
RCC_LSEConfig(RCC_LSE_ON);
for(u16_WaitForOscSource=0;u16_WaitForOscSource<5000;u16_WaitForOscSource++)
{
}
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
/* RTC Enabled */
RCC_RTCCLKCmd(ENABLE);
RTC_WaitForLastTask();
/*Wait for RTC registers synchronisation */
RTC_WaitForSynchro();
RTC_WaitForLastTask();
/* Setting RTC Interrupts-Seconds interrupt enabled */
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC , ENABLE);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
BKP_WriteBackupRegister(BKP_DR6, 1);
/* Set RTC prescaler: set RTC period to 1 sec */
RTC_SetPrescaler(32765); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) */
/* Prescaler is set to 32766 instead of 32768 to compensate for
lower as well as higher frequencies*/
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Set default system time to 09 : 24 : 00 */
SetTime(DEFAULT_HOURS,DEFAULT_MINUTES,DEFAULT_SECONDS);
BKP_WriteBackupRegister(BKP_DR1, CONFIGURATION_DONE);
}
else
{
//BKP_WriteBackupRegister(BKP_DR1, CONFIGURATION_RESET);
/* PWR and BKP clocks selection */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
for(u16_WaitForOscSource=0;u16_WaitForOscSource<5000;u16_WaitForOscSource++);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC, ENABLE);
RTC_WaitForLastTask();
}
/* Check if how many days are elapsed in power down/Low Power Mode-
Updates Date that many Times*/
CheckForDaysElapsed();
u8_ClockSource = BKP_ReadBackupRegister(BKP_DR6);
u8_TamperNumber = BKP_ReadBackupRegister(BKP_DR5);
s_DateStructVar.u8_Month = BKP_ReadBackupRegister(BKP_DR2);
s_DateStructVar.u8_Day = BKP_ReadBackupRegister(BKP_DR3);
s_DateStructVar.u16_Year = BKP_ReadBackupRegister(BKP_DR4);
u16_SummerTimeCorrect = BKP_ReadBackupRegister(BKP_DR7);
s_AlarmDateStructVar.u8_Month = BKP_ReadBackupRegister(BKP_DR8);
s_AlarmDateStructVar.u8_Day = BKP_ReadBackupRegister(BKP_DR9);
s_AlarmDateStructVar.u16_Year = BKP_ReadBackupRegister(BKP_DR10);
}
/**
* @brief COnfiguration of RTC Registers, Selection and Enabling of
* RTC clock
* @param None
* @retval : None
*/
void RTC_Configuration()
{
uint16_t WaitForOscSource;
/*Allow access to Backup Registers*/
PWR_BackupAccessCmd(ENABLE);
if(BKP_ReadBackupRegister(BKP_DR1)==CONFIGURATION_RESET)
{
/*Enables the clock to Backup and power interface peripherals */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_BKP | RCC_APB1Periph_PWR,ENABLE);
if(TotalMenuPointer == 1)
{
/* Backup Domain Reset */
BKP_DeInit();
s_DateStructVar.Month=DEFAULT_MONTH ;
s_DateStructVar.Day=DEFAULT_DAY;
s_DateStructVar.Year=DEFAULT_YEAR;
SummerTimeCorrect = OCTOBER_FLAG_SET;
BKP_WriteBackupRegister(BKP_DR7,SummerTimeCorrect);
BKP_WriteBackupRegister(BKP_DR2,s_DateStructVar.Month);
BKP_WriteBackupRegister(BKP_DR3,s_DateStructVar.Day);
BKP_WriteBackupRegister(BKP_DR4,s_DateStructVar.Year);
BKP_WriteBackupRegister(BKP_DR1, CONFIGURATION_DONE);
LCD_Clear(Blue2);
LCD_SetBackColor(Blue2);
LCD_SetTextColor(White);
LCD_DisplayString(Line2,Column0,"Please wait......");
LCD_DisplayString(Line4,Column0,"Synchronization may");
LCD_DisplayString(Line6,Column0,"take upto a minute");
EE_Format();
TamperNumber=0;
BKP_WriteBackupRegister(BKP_DR5,TamperNumber);
}
/*Enable 32.768 kHz external oscillator */
RCC_LSEConfig(RCC_LSE_ON);
for(WaitForOscSource=0;WaitForOscSource<5000;WaitForOscSource++)
{
}
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
/* RTC Enabled */
RCC_RTCCLKCmd(ENABLE);
RTC_WaitForLastTask();
/*Wait for RTC registers synchronisation */
RTC_WaitForSynchro();
RTC_WaitForLastTask();
/* Setting RTC Interrupts-Seconds interrupt enabled */
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC , ENABLE);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
if(TotalMenuPointer==1 || TotalMenuPointer==6)
{
BKP_WriteBackupRegister(BKP_DR6, 1);
/* Set RTC prescaler: set RTC period to 1 sec */
RTC_SetPrescaler(32765); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) */
/* Prescaler is set to 32766 instead of 32768 to compensate for
lower as well as higher frequencies*/
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
}
if( TotalMenuPointer==7)
{
BKP_WriteBackupRegister(BKP_DR6, 2);
/* Set RTC prescaler: set RTC period to 1 sec */
RTC_SetPrescaler(49); /* RTC period = RTCCLK/RTC_PR = (50 Hz)/(49+1) */
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
}
if(TotalMenuPointer==8)
{
BKP_WriteBackupRegister(BKP_DR6, 3);
/* Set RTC prescaler: set RTC period to 1 sec */
RTC_SetPrescaler(59); /* RTC period = RTCCLK/RTC_PR = (60 Hz)/(59+1) */
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
}
/* Set default system time to 09 : 24 : 00 */
SetTime(DEFAULT_HOURS,DEFAULT_MINUTES,DEFAULT_SECONDS);
BKP_WriteBackupRegister(BKP_DR1, CONFIGURATION_DONE);
}
else
{
/* PWR and BKP clocks selection */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
for(WaitForOscSource=0;WaitForOscSource<5000;WaitForOscSource++);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC, ENABLE);
RTC_WaitForLastTask();
}
/* Check if how many days are elapsed in power down/Low Power Mode-
Updates Date that many Times*/
CheckForDaysElapsed();
ClockSource = BKP_ReadBackupRegister(BKP_DR6);
TamperNumber = BKP_ReadBackupRegister(BKP_DR5);
s_DateStructVar.Month = BKP_ReadBackupRegister(BKP_DR2);
s_DateStructVar.Day = BKP_ReadBackupRegister(BKP_DR3);
s_DateStructVar.Year = BKP_ReadBackupRegister(BKP_DR4);
SummerTimeCorrect = BKP_ReadBackupRegister(BKP_DR7);
s_AlarmDateStructVar.Month = BKP_ReadBackupRegister(BKP_DR8);
s_AlarmDateStructVar.Day = BKP_ReadBackupRegister(BKP_DR9);
s_AlarmDateStructVar.Year = BKP_ReadBackupRegister(BKP_DR10);
}
// init RTC
void rtc_init(void)
{
uint16_t WaitForOscSource;
/*RTC_NVIC Configuration */
RTC_NVIC_Configuration();
/*Enables the clock to Backup and power interface peripherals */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_BKP | RCC_APB1Periph_PWR,ENABLE);
/*Allow access to Backup Registers*/
PWR_BackupAccessCmd(ENABLE);
if(BKP_ReadBackupRegister(BKP_DR1)== (uint16_t)(~CONFIGURATION_DONE))
{
/*Enables the clock to Backup and power interface peripherals */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_BKP | RCC_APB1Periph_PWR,ENABLE);
/* Backup Domain Reset */
BKP_DeInit();
systime.Month=DEFAULT_MONTH;
systime.Day=DEFAULT_DAY;
systime.Year=DEFAULT_YEAR;
BKP_ModifyBackupRegister(BKP_DR3, (systime.Month << 8) | systime.Day);
BKP_ModifyBackupRegister(BKP_DR5, systime.Year);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* enter config mode */
RTC_EnterConfigMode();
/*Enable 32.768 kHz external oscillator */
RCC_LSEConfig(RCC_LSE_ON);
/* select clock source for RTC */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
/* RTC Enabled */
RCC_RTCCLKCmd(ENABLE);
/*Wait for RTC registers synchronisation */
RTC_WaitForSynchro();
RTC_WaitForLastTask();
/* Setting RTC Interrupts-Seconds interrupt enabled */
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC , ENABLE);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* init prescale value*/
RTC_SetPrescaler(32767);
/* exit config mode */
RTC_ExitConfigMode();
/* Set default system time to 09 : 24 : 00 */
SetTime(DEFAULT_HOURS,DEFAULT_MINUTES);
BKP_ModifyBackupRegister(BKP_DR1, CONFIGURATION_DONE);
}
else
{
/* PWR and BKP clocks selection */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
for(WaitForOscSource=0;WaitForOscSource<5000;WaitForOscSource++);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Enable the RTC Second */
RTC_ITConfig(RTC_IT_SEC, ENABLE);
RTC_WaitForLastTask();
}
/* Check if how many days are elapsed in power down/Low Power Mode-
Updates Date that many Times*/
CheckForDaysElapsed();
systime.Month = (uint8_t)(BKP_ReadBackupRegister(BKP_DR3) >> 8);
systime.Day = (uint8_t)BKP_ReadBackupRegister(BKP_DR3);
systime.Year = (uint8_t)BKP_ReadBackupRegister(BKP_DR5);
BKP_RTCOutputConfig(BKP_RTCOutputSource_None);
}
