disp_0123.cpp.c

单片机C语言15个实验附有原理图和程序 是我的课程作业 以经过实践验证

//disp_0123
#include <stdio.h>
#include <reg51.h>
#include <intrins.h>
unsigned char code ledk[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6D,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};
unsigned char mask,i,t0_count=0;
#define hi 0x3c
#define lo 0xb0
sbit clk=P0^7;sbit sda=P0^6;
void delay(unsigned int n)
 {unsigned int i,j;
  for(i=0;i<n;i++)
     for(j=0;j<n;j++)  ;}
void shift(unsigned char dx)
{static unsigned char d;
   unsigned char j=0;
    d=dx;
   	while(j<8)
	{if((d&0x80)!=0) sda=1;
       else  sda=0;
	   clk=0;clk=1;
       d<<=1;j++;}  }

	   void t0() interrupt 1 
 {
 TH0=hi;TL0=lo;t0_count++;
    }
void main(void)
{TMOD=0x01;TH0=hi;TL0=lo;EA=1;ET0=1;TR0=1;mask=0xfe;i=0; 
  while(1)
  { shift(ledk[i]);P2=mask; mask=_crol_(mask,1);if(mask==0xef)mask=0xfe;
   i++;if(i>3)i=0;delay(20);if(t0_count==20)shift(ledk[16]);t0_count=0;
  }
}