#include <c8051f020.h>
//-------------------extern function delearation---------------
//extern void init_sys(void);
extern void delay(long int);

sbit TC0=P0^0;
sbit TC1=P0^1;
sbit TC2=P0^2;
sbit TC3=P0^3;
sbit LOADING=P0^4;

//注意：P2^5未曾使用！！！

sbit WRITE=P0^5;
//sbit FSELECT=P2^7;


//unsigned char a,ad;
void wdata(unsigned char a)
{  WRITE=0;
     P2=a;
   WRITE=1;
    WRITE=0;
 

}
void wadr(unsigned char ad)
{ LOADING=1;
  if(ad&0x01)
   TC0=1;
  else TC0=0;
   ad>>=1;
   if(ad&0x01)
   TC1=1;
  else TC1=0;
   ad>>=1;
   if(ad&1)
   TC2=1;
  else TC2=0;
   ad>>=1;
   if(ad&1)
   TC3=1;
  else TC3=0;
   LOADING=0;
   delay(3);
   LOADING=1;  
 }
void sin()

{ wdata(~0x00);
  wadr(~0x00);
  wdata(~0x00);
  wdata(~0x51);
  wdata(~0x89);
  wdata(~0x37);
  wadr(~0x08);
  
  
}