ri.c

一系列芯片的驱动代码

#include <reg51.h>
sbit sda=P0^2;//定义数据线
sbit scl=P0^3;//定义时钟线
//////////////////////////////
/*
void shift(unsigned char b)
{
 unsigned char i;
 code char led[17]={0x11,0xD7,0x32,0x92, /* 0 1 2 3 4
 0xD4,0x98,0x18,0xD3,0x10,0x90, /* 5 6 7 8 9 
 0x50,0x1C,0x39,0x16,0x38,0x78,0xff};/* A B C D E F 灭
 b=led[b];
 scl=0;
 for(i=0;i<8;i++)
 {
  if((b<<i)&0x80) 
     sda=1;
  else 
     sda=0;
  scl=1; 
  scl=0;
 }
}*/
void main()
{
	unsigned char buff;
	TMOD=0x20;
	TL1=250;
	TH1=250;
    
	EA=1;
	ES=0;
    TR1=1;
	SCON=0x50;
	PCON=0;
	
loop:
	while(!RI);
	RI=0;
	buff=SBUF;
    P2=buff;    
	goto loop;
}