【求助】GD32L233CB RTC初始化失败

#define BIN_TO_BCD(x) ((((x) / 10) << 4) + ((x) % 10))

#define BCD_TO_BIN(x) (10 * ((x) >> 4) + ((x) & 0x0F))



#define RTC_IRC32K

//#define RTC_LXTAL



#ifdef RTC_IRC32K

#define PRESCALER_S         0x13F

#define PRESCALER_A         0x63

#endif

#ifdef RTC_LXTAL

#define PRESCALER_S         0xFF

#define PRESCALER_A         0x7F

#endif



struct tm calendar;

uint32_t RTCSRC_FLAG = 0; 

void app_rtc_init()

{

        uint32_t RTCSRC_FLAG = 0; 

        rcu_periph_clock_enable(RCU_PMU);

    rcu_periph_clock_enable(RCU_BKP);

        

#ifdef RTC_IRC32K

        rcu_osci_on(RCU_IRC32K);

    rcu_osci_stab_wait(RCU_IRC32K);

    rcu_rtc_clock_config(RCU_RTCSRC_IRC32K);

#endif

#ifdef RTC_LXTAL

        rcu_osci_on(RCU_LXTAL);

    rcu_osci_stab_wait(RCU_LXTAL);

    rcu_rtc_clock_config(RCU_RTCSRC_LXTAL);

#endif

    rcu_periph_clock_enable(RCU_RTC);

    rtc_register_sync_wait();

        

         /* detect the reset source */

//        if(RESET != rcu_flag_get(RCU_FLAG_PORRST)) {

//                printf("power on reset occurred....\n\r");

//        } else if(RESET != rcu_flag_get(RCU_FLAG_EPRST)) {

//                printf("external reset occurred....\n\r");

//        }

//        printf("no need to configure RTC....\n\r");

//        rcu_all_reset_flag_clear();



        pmu_backup_write_enable();

        RTCSRC_FLAG = GET_BITS(RCU_BDCTL, 8, 9);

        if(RTCSRC_FLAG == 0x00)

        {

                calendar.tm_year=YEAR_BASE+25;

                calendar.tm_mon=12;

                calendar.tm_mday=30;

                calendar.tm_hour=1;

                calendar.tm_min=0;

                calendar.tm_sec=40;

                rtc_set_time(&calendar);

        }



}



void rtc_set_time(struct tm *time_struct)

{

        rtc_parameter_struct rtc_initpara = {0};

        /* RTC时钟频率 = 32.768kHz / (255 + 1) / (127 + 1) = 1Hz */

    rtc_initpara.factor_asyn = PRESCALER_A;

    rtc_initpara.factor_syn = PRESCALER_S;

    rtc_initpara.display_format = RTC_24HOUR;

        rtc_initpara.year = BIN_TO_BCD(time_struct->tm_year - YEAR_BASE);

        rtc_initpara.month = BIN_TO_BCD(time_struct->tm_mon);

        rtc_initpara.date = BIN_TO_BCD(time_struct->tm_mday);

        rtc_initpara.hour = BIN_TO_BCD(time_struct->tm_hour);

        rtc_initpara.minute = BIN_TO_BCD(time_struct->tm_min);

        rtc_initpara.second = BIN_TO_BCD(time_struct->tm_sec);

        rtc_initpara.day_of_week = time_struct->tm_wday;

        rtc_init(&rtc_initpara);

}