GD32E230C8 RTC 使用外部晶振不走时，要怎么配置呢？

只看该作者 · 2021-12-28 00:24

本帖最后由 lang30 于 2021-12-28 00:37 编辑

换成IRC40K 就能走时；还需要配置哪里呢？

<div class="blockcode"><blockquote>// #define RTC_CLOCK_SOURCE_IRC40K

#define RTC_CLOCK_SOURCE_LXTAL

void rtc_pre_config(void)

{

    /* enable access to RTC registers in backup domain */

    rcu_periph_clock_enable(RCU_PMU);

    pmu_backup_write_enable();



    #if defined (RTC_CLOCK_SOURCE_IRC40K)    

          /* enable the IRC40K oscillator */

          rcu_osci_on(RCU_IRC40K);

          /* wait till IRC40K is ready */

          rcu_osci_stab_wait(RCU_IRC40K);

          /* select the RTC clock source */

          rcu_rtc_clock_config(RCU_RTCSRC_IRC40K);

  

          prescaler_s = 0x18F;

          prescaler_a = 0x63;

    #elif defined (RTC_CLOCK_SOURCE_LXTAL)

           /* enable the IRC40K oscillator */

          rcu_osci_on(RCU_LXTAL);

          /* wait till IRC40K is ready */

          rcu_osci_stab_wait(RCU_LXTAL);

          /* select the RTC clock source */

          rcu_rtc_clock_config(RCU_LXTAL);

          

          prescaler_s = 0xFF;

          prescaler_a = 0x7F;

    #else

    #error RTC clock source should be defined.

    #endif /* RTC_CLOCK_SOURCE_IRC40K */



    rcu_periph_clock_enable(RCU_RTC);

    rtc_register_sync_wait();

}

只看该作者 · 2021-12-31 09:41

void RTC_Set( tm* t )
{
  rtc_parameter_struct rtc_initpara;

  /* setup RTC time value */
  rtc_initpara.factor_asyn = prescaler_a;
  rtc_initpara.factor_syn  = prescaler_s;
  rtc_initpara.year = RTC_ByteToBcd2(t->year - 2000);
  rtc_initpara.day_of_week = RTC_ByteToBcd2(t->week);
  rtc_initpara.month = RTC_ByteToBcd2(t->mon);
  rtc_initpara.date  = RTC_ByteToBcd2(t->day);
  rtc_initpara.display_format = RTC_24HOUR;

  rtc_initpara.hour = RTC_ByteToBcd2(t->hour);
  rtc_initpara.am_pm  = (t->hour < 12) ? RTC_AM : RTC_PM;
  rtc_initpara.minute = RTC_ByteToBcd2(t->min);
  rtc_initpara.second = RTC_ByteToBcd2(t->sec);

  /* RTC current time configuration */
  if(ERROR == rtc_init(&rtc_initpara))
  {
//       printf("\n\r** RTC time configuration failed! **\n\r");
  }
  else
  {
//       printf("\n\r** RTC time configuration success! **\n\r");
   RTC_BKP0 = BKP_VALUE;
  }
}

只看该作者 · 2022-1-6 11:41

QQ2224043166 发表于 2021-12-31 09:41
void RTC_Set( tm* t )
{
rtc_parameter_struct rtc_initpara;

这个只是设置时间，不是配置啊