LPC1768 -- RTC使用方法

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LPC 内部RTC配置比较简单，其初始化方法如下：

void RTC_Init( void ){   PCONP_bit.PCRTC = 1;        // Enable the peripheral clock for RTC   if( RTCCCR_bit.CLKEN == 0 ) {          RTCILR = 0;          RTCAMR = 0xFF;                   RTCCIIR = 0;          RTCCCR = 0;          RTC_Set_DefTime();          RTC_Start();    }}

获取时间函数，在这里需要建立一个RTC的结构体，用于存储时间数据.

typedef{    INT8U u8_Second;    INT8U u8_Minute;    INT8U u8_Hour;    INT8U u8_DayMonth;    INT8U u8_DayWeek;    INT16U u16_DayYear;    INT8U u8_Month;    INT16U u8_Year;}void RTC_Get_Time( RTC* pst_time ){    pst_time->u8_Year = RTCCTIME1_bit.YEAR - 2000;    pst_time->u8_Month = RTCCTIME1_bit.MON;    pst_time->u16_DayYear = RTCCTIME2_bit.DOY;    pst_time->u8_DayWeek = RTCCTIME0_bit.DOW;    pst_time->u8_DayMonth = RTCCTIME1_bit.DOM;    pst_time->u8_Hour = RTCCTIME0_bit.HOUR;    pst_time->u8_Minute = RTCCTIME0_bit.MIN;    pst_time->u8_Second = RTCCTIME0_bit.SEC;}

同样使用该结构体初始化时间参数

void RTC_Set_Time( RTC* pst_time ){    RTCSEC_bit.SEC = pst_time->u8_Second;    RTCMIN_bit.MIN = pst_time->u8_Minute;    RTCHOUR_bit.HOUR = pst_time->u8_Hour;    RTCDOM_bit.DOM = pst_time->u8_DayMonth;    RTCDOW_bit.DOW = pst_time->u8_DayWeek;    RTCDOY_bit.DOY = pst_time->u16_DayYear;    RTCMONTH_bit.MON = pst_time->u8_Month;    RTCYEAR_bit.YEAR = pst_time->u8_Year + 2000;}

通过以上三个函数即完成了RTC的配置工作。

void TestRTC(void){   RTC_Get_Time( &GetRtc );   static INT8U Second = 0;   if( Second != GetRtc.u8_Second){      Second = GetRtc.u8_Second;   printf("Current data : %d-%d-%d\r\n",GetRtc.u8_Year+2000,GetRtc.u8_Month,GetRtc.u8_DayMonth);      printf("Current Time : %d:%d:%d\r\n",GetRtc.u8_Hour,GetRtc.u8_Minute,GetRtc.u8_Second);   }}

测试结果：通过uart接口打印在PC机串口监控软件上。
Current data : 2011-10-13
Current Time : 0:58:39
Current data : 2011-10-13
Current Time : 0:58:40
Current data : 2011-10-13
Current Time : 0:58:41
Current data : 2011-10-13
Current Time : 0:58:42
Current data : 2011-10-13
Current Time : 0:58:43
Current data : 2011-10-13
Current Time : 0:58:44
Current data : 2011-10-13
Current Time : 0:58:45
Current data : 2011-10-13

Current Time : 0:58:56