mega16驱动ds12c887显示于lcd1602

#include<iom16v.h>
#include<macros.h>
#define uchar unsigned char
#define uint unsigned int
#define DS_ PORTC&=~BIT(6)
#define DS PORTC|=BIT(6)
#define RW_ PORTC&=~BIT(5)
#define RW PORTC|=BIT(5)
#define AS_ PORTC&=~BIT(4)
#define AS PORTC|=BIT(4)
#define CS_ PORTC&=~BIT(3)
#define CS PORTC|=BIT(3)
uchar tab1[]={"DAT:"};
uchar tab2[]={"TIME:"};
const uchar tab[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x20};
extern uchar dat[]={0x32,0x30,0x31,0x31,0x2d,0x39,0x39,0x2d,0x30,0x36};
extern uchar time[8]={0x30,0x30,0x2d,0x30,0x30,0x2d,0x30,0x30};
uchar sec=0,min=0,hou=0,day=0,mon=0,yea=0,week=0;
void delay(uint z)
{
while(z--);
}
void disan()
{
uchar hlb;
hlb=hou;
  dat[0x00]=2+0x30;
  dat[0x01]=0+0x30;
  dat[0x02]=yea%100/10+0x30;
  dat[0x03]=yea%16+0x30;
  dat[0x05]=mon/16+0x30;
  dat[0x06]=mon%16+0x30;
  dat[0x08]=day/16+0x30;
  dat[0x09]=day%16+0x30;
  time[0x00]=hou/16+0x30;
  time[0x01]=hou%16+0x30;
  time[0x03]=min/16+0x30;
  time[0x04]=min%16+0x30;
  time[0x06]=sec/16+0x30;
  time[0x07]=sec%16+0x30;

}
void write_com(uchar com)
{
PORTC&=~BIT(2);
PORTC&=~BIT(1);
PORTB=com;
PORTC|=BIT(0);
delay(1);
PORTC&=~BIT(0);
delay(3);
}

void write_dat(uchar dat)
{
PORTC|=BIT(2);
PORTC&=~BIT(1);
PORTB=dat;
PORTC|=BIT(0);
delay(1);
PORTC&=~BIT(0);
delay(3);

}
void init()
{
  write_com(0X38);
delay(5);
  write_com(0X0c);
delay(5);
  write_com(0X06);
delay(5);
}

void write_ds(uchar add,uchar date)
{
CS_;
RW;
DS;
AS;
PORTA=add;
AS_;
RW_;
PORTA=date;
delay(1);
RW;
AS;
CS;
}
uchar read_ds(uchar add)
{
uchar ds_date;
CS_;
DS;
RW;
AS;
PORTA=add;
AS_;
DS_;
DDRA=0X00;
delay(1);
ds_date=PINA;
DDRA=0XFF;
DS;
AS;
CS;
return ds_date;
}

void ds12887()
{
sec=read_ds(0);
min=read_ds(2);
hou=read_ds(4);
day=read_ds(7);
mon=read_ds(8);
week=read_ds(6);
yea=read_ds(9);
}
void display()
{
uchar i;
init();
write_com(0X80);
delay(5);
for(i=0;i<4;i++)
{
write_dat(tab1[i]);
delay(5);
}
for(i=0;i<10;i++)
{
write_dat(dat[i]);
delay(5);
}
write_com(0X80+0X40);
delay(5);
for(i=0;i<5;i++)
{
write_dat(tab2[i]);
delay(5);
}
for(i=0;i<8;i++)
{
write_dat(time[i]);
delay(5);
}
write_dat(0x20);
delay(5);
write_dat(0x20);
delay(5);
write_dat(0x30+week);
delay(5);
}
void key_set()
{
  write_ds(9,0x11);
  write_ds(8,0x11);
  write_ds(7,0x03);
  write_ds(6,0x06);
  write_ds(4,0x18);
  write_ds(2,0x45);
  write_ds(0,0x50);
}
void main()
{
  MCUCSR |= 1<<JTD;
  MCUCSR |= 1<<JTD; 
DDRA=0XFF;
DDRB=0XFF;
DDRC=0XFF;
  write_com(0X01);
  write_com(0X03);
/////////////////
write_ds(0x0b,0x02);
//key_set();
while(1)
{
ds12887();
disan();
display();
delay(1000);
}
}

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