RTC时钟问题

gerbil

RTC时钟问题 [复制链接]

手里有一块板子，用以前写好的程序（RTC做万年历），在其他板子（开发板、自己设计的电路板）上，时钟都能正常使用，但是在新做的板子上，每次上电，时钟就初始化了，感觉备份区的寄存器掉电后，内容变了。不知道哪位遇到过这样的问题

anchen_1984

估计电路问题比较大。

pepper

应该是电路问题~或者芯片和液晶显示器的问题~

jerohands

昨天晚上太晚了，发代码和电路的时候不能操作，马上把代码跟电路图送上

qqnayz

int main(void)
{
#ifdef DEBUG
  debug();
#endif


      /***********时钟配置************/
  RCC_Configuration();

      /***********嵌套中断配置********/
  NVIC_Configuration();

      /***********GPIO配置************/
      GPIO_Configuration();

      GPIO_WriteBit(GPIOB, GPIO_PIN_RUN_LED, Bit_SET);
      /***********实时时钟配置********/


      /***********系统滴答时钟配置****/
      SysTick_Config();

      /***********USART配置***********/
      USART_Configuration();
      RTC_Configuration();

      /***********看门配置************/
      IWDOG_Configuration();

      /***********存储器配置**********/
  SPI_FLASH_Init();

      /***********定时器**************/
      TIM_Configuration();

      /***********ADC配置*************/
      ADC_Configuration();
      DAC_Configuration();
      Delay(50);
      Send_Reset();

//       GPIO_WriteBit(GPIOB, GPIO_PIN_RUN_LED, Bit_RESET);
      TR_FLAG1 = 0x80;
  TR_FLAG2 = 0x80;
      TR_FLAG3 = 0x80;
      Run_Lost = 0;
      Time_Read_Flag = 0;
      UART_Send_Flag = 0x00;

  timer0 = 0;
  Soil_Read_Flag = 1;


      while (1)
      {
         ....................
            }
}这个是主函数

xinyi7200

/*******************************************************************************
* Function Name  : RTC_Configuration
* Description : Configures the RTC.
* Input       : None
* Output       : None
* Return       : None
*******************************************************************************/
void RTC_Configuration(void)
{
char text[20];
int j;
u32 v;
  /* Enable PWR and BKP clocks */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);

  /* Allow access to BKP Domain */
  PWR_BackupAccessCmd(ENABLE);
v =  BKP_ReadBackupRegister(BKP_DR1);
sprintf(text,"BKP_DR1 = 0x%x\n",v);
for(j=0;text[j] != '\0';j++)
{
TxBuffer1[j] = text[j];
}

  TxCounter1 =j;
  TxPointer1 = 0;

  USART_ITConfig(USART1, USART_IT_TXE, ENABLE);
while(TxPointer1 < TxCounter1)
{
IWDG_ReloadCounter();
__nop();
}
  TR_FLAG1 = 0x80;
if (BKP_ReadBackupRegister(BKP_DR1)!=0xA5A5)
{

  /* Reset Backup Domain */
    BKP_DeInit();
BKP_WriteBackupRegister(BKP_DR2,2008);
      BKP_WriteBackupRegister(BKP_DR3,1);
      BKP_WriteBackupRegister(BKP_DR4,1);
      BKP_WriteBackupRegister(BKP_DR1, 0xA5A5);
RTC_SetCounter(0x0);

   /* Enable LSE */
   RCC_LSEConfig(RCC_LSE_ON);
   /* Wait till LSE is ready */
   while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
   {}

   /* Select LSE as RTC Clock Source */
   RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);

   /* Enable RTC Clock */
   RCC_RTCCLKCmd(ENABLE);

   /* Wait for RTC registers synchronization */
   RTC_WaitForSynchro();

   /* Wait until last write operation on RTC registers has finished */
   RTC_WaitForLastTask();
     RTC_WaitForSynchro();
RTC_WaitForLastTask();
   /* Enable the RTC Second */
   RTC_ITConfig(RTC_IT_SEC, ENABLE);

   /* Wait until last write operation on RTC registers has finished */
   RTC_WaitForLastTask();

   /* Set RTC prescaler: set RTC period to 1sec */
RTC_SetPrescaler(32767); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) */
//  RTC_SetPrescaler(16383); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) */
   /* Wait until last write operation on RTC registers has finished */
   RTC_WaitForLastTask();

}
else
{
RTC_WaitForLastTask();
      /* Enable the RTC Second */
      RTC_ITConfig(RTC_IT_SEC, ENABLE);
      RTC_WaitForLastTask();
}

CheckForDaysElapsed();
}

这个是RTC配置