#include

#define uint unsigned int
#define uchar unsigned char

/************声明*************/
void ds1302_init();

/*************LCD12864*************/

sbit beer=P2^0;

#define P0 P0

uchar code table1[]={"电子时钟"};
uchar code table2[]={"时间："}; 
uchar code table3[]={"日期："};

sbit lcd_rs=P1^0;//定义LCD引脚 
sbit lcd_rw=P1^1;
sbit lcd_en=P1^2;
sbit lcd_psb=P2^4;
sbit lcd_rst=P2^3;

void delay(uint z) //延时 
{
 uint x,y;
 for(x=110;x>0;x--);
  for(y=z;y>0;y--);
}

void lcd_w_com(uchar com)//写命令 
{
 lcd_rs=0;
 lcd_rw=0;
 lcd_en=0;
 P0=com;
 delay(5);
 lcd_en=1;
 delay(5);
 lcd_en=0;
}

void lcd_w_data(uchar date)// 写数据 
{
 lcd_rs=1;
 lcd_rw=0;
 lcd_en=0;
 P0=date;
 delay(5);
 lcd_en=1;
 delay(5);
 lcd_en=0;
}

void lcd_init()//液晶初始化 
{
 lcd_rst=0;
 delay(10);
 lcd_rst=1;
 delay(10);
 lcd_psb=1;

 P3=0xff;
 key5=1;
 key6=1;

 lcd_w_com(0x30);
 lcd_w_com(0x0c);
 lcd_w_com(0x14);
 lcd_w_com(0x01);
}

void lcd_pos(uchar x,uchar y)//选择写入位置 
{
 uchar pos;
 if(x==0)
  {x=0x80;}
 else if(x==1)
  {x=0x90;}
 else if(x==2)
  {x=0x88;}
 else if(x==3)
  {x=0x98;}
 pos=x+y;
 lcd_w_com(pos);
}

void clr_screen()//清屏 
{
 lcd_w_com(0x34);
 delay(5);
 lcd_w_com(0x30);
 delay(5);
 lcd_w_com(0x01);
}

void disp_chinese(uchar code *s)
{
 while(*s>0)
 {
  lcd_w_data(*s);
  s++;
  delay(500);
 }
}

void disp_title()
{
    uchar i;
  lcd_pos(0,2);
  i=0;
  while(table1[i]!='\0')
  {
   lcd_w_data(table1[i]);
   i++;
  }
 
  lcd_pos(1,0);
  i=0;
  while(table2[i]!='\0')
  {
   lcd_w_data(table2[i]);
   i++;
  }
 
  lcd_pos(2,0);
  i=0;
  while(table3[i]!='\0')
  {
   lcd_w_data(table3[i]);
   i++;
  }
 
  lcd_pos(3,0);
  i=0;

}

/***********DS1302************/
sbit ds1302_sclk=P3^4;// 时钟线引脚 
sbit ds1302_io=P3^5;  //数据线引脚 
sbit ds1302_rst=P3^6; //复位线引脚

uchar year,month,day,week,hour,minute,second;
uchar time[20];

uchar ds1302_r_data(uchar addr)//读DS1302数据 
{
 uchar i,j,k;
 ds1302_rst=0;
 ds1302_sclk=0;
 ds1302_rst=1;
 for(i=0x01,j=0;j<8;j++)
 {
  if(addr&i)
  ds1302_io=1;
  else
  ds1302_io=0;
  ds1302_sclk=1;
  i=i<<1;
  ds1302_sclk=0;
 }
 k=0;
 for(i=0;i<8;i++)
 {
  k>>=1;
  ds1302_sclk=0;
  if(ds1302_io)
  k|=0x80;
  ds1302_sclk=1;
 }
 ds1302_rst=0;
 ds1302_sclk=1;
 return(k);
}

void ds1302_w_data(uchar addr,uchar dat)//向DS1302写入数据 
{
 uchar i,j;
 ds1302_rst=0;
 ds1302_sclk=0;
 ds1302_rst=1;
 for(i=0x01,j=0;j<8;j++)
 {
  if(addr&i)
  ds1302_io=1;
  else
  ds1302_io=0;
  ds1302_sclk=1;
  i=i<<1;
  ds1302_sclk=0;
 }
 for(i=0x01,j=0;j<8;j++)
 {
  if(dat&i)
  ds1302_io=1;
  else
  ds1302_io=0;
  ds1302_sclk=1;
  i=i<<1;
  ds1302_sclk=0;
 }
 ds1302_rst=0;
 ds1302_sclk=1;
}

void ds1302_init()//DS1302初始化 (如果有初始化，每次上电都将
      //      重新设置时间，无法让1302断电保持！)
{
 ds1302_w_data(0x8e,0x00);
 ds1302_w_data(0x90,0x00);
 ds1302_w_data(0x80,0x00);//秒
   ds1302_w_data(0x82,0x30);//分
 ds1302_w_data(0x84,0x12);//时
 ds1302_w_data(0x86,0x07);//日
 ds1302_w_data(0x88,0x10);//月
 ds1302_w_data(0x8c,0x08);//年
 ds1302_w_data(0x8a,0x02);//星期
 ds1302_w_data(0x8e,0x80);
}

void dotime()//时间处理 
{
time[0]=ds1302_r_data(0x81);
time[1]=ds1302_r_data(0x83);
time[2]=ds1302_r_data(0x85);
time[3]=ds1302_r_data(0x87);
time[4]=ds1302_r_data(0x89);
time[5]=ds1302_r_data(0x8d);
time[6]=ds1302_r_data(0x8b);
second=((time[0]&0x70)>>4)*10+(time[0]&0x0f);
minute=((time[1]&0x70)>>4)*10+(time[1]&0x0f);
hour=((time[2]&0x70)>>4)*10+(time[2]&0x0f);
day=((time[3]&0x70)>>4)*10+(time[3]&0x0f);
month=((time[4]&0x70)>>4)*10+(time[4]&0x0f);
year=((time[5]&0x70)>>4)*10+(time[5]&0x0f);
week=((time[6]&0x70)>>4)*10+(time[6]&0x0f);
}

void disp_week()//显示星期 
{
  dotime();
  switch(week)
  {
    case 1:
            lcd_pos(3,0);
            disp_chinese("星期一 ");
   break;
  case 2:
            lcd_pos(3,0);
            disp_chinese("星期二");
   break;
  case 3:
            lcd_pos(3,0);
            disp_chinese("星期三");
   break;
  case 4:
            lcd_pos(3,0);
            disp_chinese("星期四");
   break;
  case 5:
            lcd_pos(3,0);
            disp_chinese("星期五");
   break;
  case 6:
            lcd_pos(3,0);
            disp_chinese("星期六");
   break;
  case 7:
            lcd_pos(3,0);
            disp_chinese("星期日");
   break;
  }
}

void disp_data()//显示时间 
{
 dotime();
 lcd_pos(1,3);
 lcd_w_data(0x30+hour/10);
 lcd_w_data(0x30+hour%10);
 lcd_w_data(0x3a);
 lcd_w_data(0x30+minute/10);
 lcd_w_data(0x30+minute%10);
 lcd_w_data(0x3a);
 lcd_w_data(0x30+second/10);
 lcd_w_data(0x30+second%10);
 lcd_pos(2,3);
 lcd_w_data(0x30+year/10);
 lcd_w_data(0x30+year%10);
 lcd_w_data('-');
 lcd_w_data(0x30+month/10);
 lcd_w_data(0x30+month%10);
 lcd_w_data('-');
 lcd_w_data(0x30+day/10);
 lcd_w_data(0x30+day%10);
}

void main()
{
 lcd_init();//液晶初始化
 dotime();
 while(1)
 {
    dotime();//处理时间
  disp_title();//显示表头
  disp_week();//显示星期
  disp_data();//显示时间与日期
  keyscan();  //扫描键盘 
 }
}