串行数码管动态扫描.c

串行扩展数码管显示

#include "AT89X52.h"

#define uchar unsigned char
#define uint  unsigned int
#define Ls138 P0

code uchar led[] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x98};
void delay(uint i);
display();
bit time_flag = 0;
main()
{
 SCON = 0x00;
 TMOD = 0x01;
 TH0 = 0x3c;
 TL0 = 0xb0;
 EA =1;
 ET0 = 1;
 TR0 = 1;
 display();
 while(1);
}
display()
{uchar i;
     Ls138 = 0x00;
  for(i=0;i<=160;i+=32)
  {
	Ls138 = i;
	SBUF = ~led[7];
	if(i==160) i=0;
		
    while(!TI);
	TI = 0;
  }
}
void time0() interrupt 1 using 0
{
	TR0 = 0;
	TH0 = 0x3c;
 	TL0 = 0xb0;
	time_flag = 1;
	TR0 =1;
}