这是DS1302+1602万年历的代码，帮我看看什么错了

#include<reg52.h>
#include<intrins.h>
#include<string.h>
#define uint unsigned int
#define uchar unsigned char
sbit IO=P1^0;
sbit SCLK=P1^1;
sbit RST=P1^2;
sbit RS=P2^0;
sbit RW=P2^1;
sbit EN=P2^2;
uchar*WEEK[]=
{
"SUN","***","MON","TUS","WEN","THU","FRI","SAT"
};
uchar LCD_DSY_BUFFER1[]={"DATE 00-00-00"};
uchar LCD_DSY_BUFFER2[]={"TIME 00:00:00"};
uchar DateTime[7];
void DelayMS(uint ms)
{
uchar i;
while(ms--)
{
for(i=0;i<120;i++);
}
}
void Write_A_Byte_TO_DS1302(uchar x)
{
uchar i;
for(i=0;i<8;i++)
{
  IO=x&0x01;SCLK=1;SCLK=0;x>>=1;
  }
  }

uchar Get_A_Byte_FROM_DS1302()
{
uchar i,b=0x00;
for(i=0;i<8;i++)
{
   b|=_crol_((uchar)IO,i);
   SCLK=1;SCLK=0;
   }
   return b/16*10+b%16;
   }
uchar Read_Data(uchar addr)
{
uchar dat;
RST=0;SCLK=0;RST=1;
Write_A_Byte_TO_DS1302(addr);
dat=Get_A_Byte_FROM_DS1302();
SCLK=1;RST=0;
return dat;
}
void GetTime()
{
  uchar i;addr=0x81;
  for(i=0;i<7;i++)
  {
    DateTime[i]=Read_Data(addr);addr+=2;
}
}
uchar Read_LCD_State()
{
   uchar state;
   RS=0;RW=1;EN=1;DelayMS(1);
   state=P0;
   EN=0;DelayMS(1);
   return state;
   }
void LCD_Busy_Wait()
{
while((Read_LCD_State()&0x80)==0x80);
DelayMS(5);
}
void Write_LCD_Data(uchar dat)
{
  LCD_Busy_Wait();
  RS=1;RW=0;EN=0;P0=dat;EN=1;DelayMS(1);EN=0;
  }
void Write_LCD_Command(uchar cmd)
{
  LCD_Busy_Wait();
  RS=0;RW=0;EN=0;P0=cmd;EN=1;DelayMS(1);EN=0;
  }
void Init_LCD()
{
Write_LCD_Command(0x38);
DelayMS(1);
Write_LCD_Command(0x01);
DelayMS(1);
Write_LCD_Command(0x06);
DelayMS(1);
Write_LCD_Command(0x0c);
DelayMS(1);
}
void Set_LCD_POS(uchar p)
{
  Write_LCD_Command(p|0x80);
  }
void Display_LCD_String(uchar p,uchar *s)
{
  uchar i;
  Set_LCD_POS(p);
  for(i=0;i<16;i++)
  {
   Write_LCD_Data(s[i]);
   DelayMS(1);
   }
   }
void Format_DateTime(uchar d,uchar *a)
{
a[0]=d/10+'0';
a[1]=d%10+'0';
}
void main()
{
  Init_LCD();
  while(1)
  {
    GetTime();
Format_DateTime(DateTime[6],LCD_DSY_BUFFER1+5);
Format_DateTime(DateTime[4],LCD_DSY_BUFFER1+8);
Format_DateTime(DateTime[3],LCD_DSY_BUFFER1+11);
strcpy(LCD_DSY_BUFFER1+13,WEEK[DateTime[5]]);
Format_DateTime(DateTime[2],LCD_DSY_BUFFER1+5);
Format_DateTime(DateTime[1],LCD_DSY_BUFFER1+8);
Format_DateTime(DateTime[0],LCD_DSY_BUFFER1+11);
Display_LCD_String(0x00,LCD_DSY_BUFFER1);
Display_LCD_String(0x40,LCD_DSY_BUFFER2);
}
}


提示 addr  没定义