1302.h

自己做的单片机Proteus仿真实例

#ifndef _DS1302_H__			 //防止重载
#define _DS1302_H__
#define ds1302_second 0x80
#define ds1302_minute 0x82
#define ds1302_hour 0x84
#define ds1302_day 0x86
#define ds1302_week 0x8a
#define ds1302_month 0x88
#define ds1302_year 0x8c
/**端口定义**/
sbit  IO=P1^6;
sbit CLK=P1^7;
sbit RST=P1^5;
sbit ACC0=ACC^0;
sbit ACC7=ACC^7;
uchar datastring[13];         ////存放时间的数组
typedef struct
{
 	uchar second;
	uchar minute;
	uchar hour;
	uchar day;
	uchar week;
	uchar month;
	uchar year;
}systemtime;//定义的时间的类型
void ds1302_write(uchar dat)
{
  uchar i,j;
  j=dat;
  for(i=0;i<8;i++)		//这里有一个让我郁闷了几天的问题,如果把j都改为ACC这句改为
   {					//for(i=0;i<8;i++)仿真就会不成功,高手指点下!!
     IO=j&0x01;			
	 CLK=1;
	 CLK=0;
	 j>>=1;
   }
}
/**实时时钟读出一个字节**/
uchar ds1302_read()
{
  uchar i;
  for(i=0;i<8;i++)
    {
	  ACC=ACC>>1;	
	  ACC7=IO;
	  CLK=1;
	  CLK=0;
	}
  return(ACC);
}
/**写入数据**/
void dat_write(uchar addr,uchar dat)   //addr为要写数据的地址,dat为要写的数据
{
  RST=0;
  CLK=0;
  RST=1;
  ds1302_write(addr);
  ds1302_write(dat);
  CLK=1;
  RST=0;
}	
/**读出数据**/
uchar dat_read(uchar addr)
{
  uchar dat;
  RST=0;
  CLK=0;
  RST=1;
  ds1302_write(addr|0x01);
  dat=ds1302_read();
  CLK=1;
  RST=0;
  return(dat);
}
/**是否写保护**/
void ds1302_protect(bit flag)
{
  if(flag)
    dat_write(0x8e,0x10);			 //禁止写
  else
    dat_write(0x8e,0x00);			 //允许写
}
/**时间设置**/
void settime(uchar addr,uchar value)
{
  ds1302_protect(0);
  dat_write(addr,value);
  ds1302_protect(1);
}
/**时间增减设置**/
void set(uchar adr,bit flag)
{
  uchar dat;
  dat=dat_read(adr);
  if(flag)
    dat_write(adr,dat+1);
  else
    dat_write(adr,dat-1);
}
/**12/24小时时间设置**/
void day_set(bit flag)				 //flag为1为12时制,为0则为24小时制
{ 
  uchar hour;
  hour=(dat_read(0x85)&0x7f);		 //保留小时寄存器中原有的时间值
  ds1302_protect(0)	;
  if(flag)
    {
	  dat_write(0x84,0x80|hour);
	}
  else
    {
	  dat_write(0x84,0x00|hour);
	}
  ds1302_protect(1);
} 
/**取时间**/
void gettime(systemtime *time) 
{
  uchar readvalue;
  readvalue=dat_read(ds1302_second);
  time->second=((readvalue&0x70)>>4)*10+(readvalue&0x0f);
  readvalue=dat_read(ds1302_minute);
  time->minute=((readvalue&0x70)>>4)*10+(readvalue&0x0f);
  readvalue=dat_read(ds1302_hour);
  time->hour=((readvalue&0x30)>>4)*10+(readvalue&0x0f);
  readvalue=dat_read(ds1302_day);
  time->day=((readvalue&0x30)>>4)*10+(readvalue&0x0f);
  readvalue=dat_read(ds1302_week);
  time->week=(readvalue&0x07);
  readvalue=dat_read(ds1302_month);
  time->month=((readvalue&0x01)>>4)*10+(readvalue&0x0f);
  readvalue=dat_read(ds1302_year);
  time->year=((readvalue&0xf0)>>4)*10+(readvalue&0x0f);
  datastring[0]=time->year/10;
  datastring[1]=time->year%10;
  datastring[2]=time->month/10;
  datastring[3]=time->month%10;
  datastring[4]=time->day/10;
  datastring[5]=time->day%10;
  datastring[6]=time->hour/10;
  datastring[7]=time->hour%10;
  datastring[8]=time->minute/10;
  datastring[9]=time->minute%10;
  datastring[10]=time->second/10;
  datastring[11]=time->second%10;
  datastring[12]=time->week;
  }
   /**初始时间设置为2008-08-08 08时08分08秒**/
void init_time(void)
{
  day_set(0);
  settime(ds1302_second,0x08);
  settime(ds1302_minute,0x08);
  settime(ds1302_hour,0x08);
  settime(ds1302_day,0x08);
  settime(ds1302_month,0x08);
  settime(ds1302_year,0x08);
  settime(ds1302_week,0x05);
  }
   /**DS1302初始化**/
void init_ds1302(void)
{
  uchar second=dat_read(ds1302_second);
  if(second&0x80)
    settime(ds1302_second,0);
}

#endif