MSP430F5418的RTC设置问题

void Init_Rtc(void)
{
RTCCTL01 = RTCBCD + RTCHOLD + RTCMODE + RTCTEV_0 ;// BCD码日历格式输出
RTCPS0CTL = RT0PSHOLD ; //配置两个计数器分频
RTCPS1CTL = RT1PSHOLD ;
if(RTCYEAR<0x2015||RTCYEAR>0x2050)
{
RTCSEC = g_now.Sec; //初始化秒
RTCMIN = g_now.Min ; //初始化分钟
RTCHOUR =g_now.Hour; //初始化小时
RTCDOW = 0X04 ;
RTCDAY = g_now.Day; //日期初始化
RTCMON = g_now.Month ; //初始化月份
RTCYEAR = g_now.Year; //初始化年份
}
RTCCTL01 &= ~RTCHOLD; //打开RTC模块
RTCPS0CTL &= ~RT0PSHOLD; //打开RTCPS0CTL
RTCPS1CTL &= ~RT1PSHOLD; //打开RTCPS1CTL
RTCCTL0 |= RTCAIE;
RTCCTL1 &= ~(RTCHOLD);
}