timer.c

lpc2136芯片的硬件全部功能示例程序

/*************************************************************
		WPD800 时钟处理
		修改历史    2007-10-9  zaken create version 1.0


*************************************************************/

#include "config.h"
#include "target.h"
#include "main.h"
#include "timer.h"

volatile TDATE g_tDate;//系统时间

//初始化时钟
void Timer_Init(void)
{
	DWORD time,date;
	PREINT = Fpclk / 32768 - 1;	    // 设置基准时钟分频器
    PREFRAC = Fpclk - (Fpclk / 32768) * 32768;
    CIIR =0;//不使用中断
	ILR=0x03;//清除中断标志
	//读出时间	
	time=CTIME0;
	date=CTIME1;
	g_tDate.ms=(time&0x3f)*1000;
	g_tDate.min=((time>>8)&0x3f);
	g_tDate.hour=((time>>16)&0x3f);
//	g_tDate.week=((time>>24)&0x3f);
	g_tDate.day=(date&0x3f);
	g_tDate.month=((date>>8)&0x3f);
	g_tDate.year=((date>>16)&0x3f);
	CCR=0x01;//启动时间计数器
}
void Timer_Read(TDATE *pDate)
{
	DWORD time,date;
	time=CTIME0;
	date=CTIME1;
	pDate->ms=(time&0x3f)*1000;
	pDate->min=((time>>8)&0x3f);
	pDate->hour=((time>>16)&0x3f);
//	pDate->week=((time>>24)&0x3f);
	pDate->day=(date&0x3f);
	pDate->month=((date>>8)&0x3f);
	pDate->year=((date>>16)&0x3f);
}
int Timer_Write(TDATE *pDate)
{
	//合法性判断
	if(pDate->year>2050 || pDate->year <1950)
	{
		return ERROR;
	}
	if(pDate->month>12 || pDate->month==0)
	{
		return ERROR;
	}
	if(pDate->day>31 || pDate->day==0)
	{
		return ERROR;
	}
	if(pDate->hour>23)
	{
		return ERROR;
	}
	if(pDate->min>59)
	{
		return ERROR;
	}
	if(pDate->ms>59999)
	{
		return ERROR;
	}
	CCR=0x02;//复位RTC 禁止时钟计数器
	//写入时间
	g_tDate=*pDate;
	YEAR=pDate->year;
	MONTH=pDate->month;
	DOM=pDate->day;
	HOUR=pDate->hour;
	MIN=pDate->min;
	SEC=pDate->ms/1000;
	CCR=0x01;//启动时间计数器
	return OK;
}