SMT32 RTC秒中断问题

只看该作者 · 2009-9-28 16:47

请路过的看一下，我在用RTC秒中断时，为什么每次要隔好七八秒钟才会产生一次中断？输出一次数据！
配置部分：
void RTC_Configuration(void) { /* Enable PWR and BKP clocks */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE); /* Allow access to BKP Domain */ PWR_BackupAccessCmd(ENABLE); /* Reset Backup Domain */ BKP_DeInit(); /* 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(); /* 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) */ /* Wait until last write operation on RTC registers has finished */ RTC_WaitForLastTask(); }

测试部分：
void Time_Show(void)
{
  printf("\n\r");
  /* Infinite loop */
  while (1)
  {
/* If 1s has paased */
if (TimeDisplay == 1)
{
   /* Display current time */
   Time_Display(RTC_GetCounter());
   TimeDisplay = 0;
}
  }
}

void Time_Display(u32 TimeVar)
{
  u32 THH = 0, TMM = 0, TSS = 0;
  /* Compute  hours */
  THH = TimeVar / 3600;
  /* Compute minutes */
  TMM = (TimeVar % 3600) / 60;
  /* Compute seconds */
  TSS = (TimeVar % 3600) % 60;
  printf("Time: %0.2d:%0.2d:%0.2d\r", THH, TMM, TSS);
}

只看该作者 · 2009-9-28 16:54

看不懂，不过问问楼主，你的中断时什么触发的，如果是时间，那就跟你设置的时间有关系了