void InitPeriph(void)
{
CRC_Configure();
TIM_Configure();
GPIO_Configure();
USART_Configure();
ADC_Configure();
RTC_Configure();
RTC_Time_Configure(0, 0, 0);
RTC_Alarm_Configure(0xFF, 20, 0); //Alarm each 20 min (Check humidity)
dxdev_out(USART_SendChar);
SPI_Configure();
}
// 初始化RTC时钟。
void rtc_init(void)
{
systick = 0;
// 检查备份寄存器中的RTC校准标志是否被设置，若未被设置，则校准RTC
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) */
/* RTC Configuration */
RTC_Configure();
/* Adjust time by values entred by the user on the hyperterminal */
// Time_Adjust();
// 校准RTC后在备份寄存器中写入校准标志
BKP_WriteBackupRegister(BKP_DR1, 0xA5A5);
}
else // 若RTC已经被校准(备份寄存器在MCU关机但不断电情况下可保持内容)，则无需再校准
{
//启用PWR和BKP的时钟（from APB1）
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
//后备域解锁，以为内RTC处于后备域，操作其相关寄存器时需要先解锁
PWR_BackupAccessCmd(ENABLE);
#ifdef RTCClockSource_LSI
/* Enable LSI */
RCC_LSICmd(ENABLE);
/* Wait till LSI is ready */
while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
{
}
/* Select LSI as RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
#endif
RCC_RTCCLKCmd(ENABLE);
//==========================================================
/* Check if the Power On Reset flag is set */
#if 0
if(RCC_GetFlagStatus(RCC_FLAG_PORRST) != RESET)
{
//printf("\r\n\n Power On Reset occurred....");
}
/* Check if the Pin Reset flag is set */
else if(RCC_GetFlagStatus(RCC_FLAG_PINRST) != RESET)
{
//printf("\r\n\n External Reset occurred....");
}
#endif
//printf("\r\n No need to configure RTC....");
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/*允许RTC报警中断*/
RTC_ITConfig(RTC_IT_ALR, ENABLE);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
}
/* Clear reset flags */
RCC_ClearFlag();
/*等待最后一条写指令完成*/
RTC_WaitForLastTask();
/* Display time in infinte loop */
//Time_Show();
RTC_SetAlarm(systick+SYSTICK_PERIOD);
}