4位disp_0_f.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

//4λdisp_0_F
#include <stdio.h>
#include <reg51.h>
#include <intrins.h>
#define hi 0x3c
#define lo 0xb0
unsigned  char code ledk[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6D,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};

sbit P37=P3^7;sbit clk=P0^7;sbit sda=P0^6;               //74LS164
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 
 {//static unsigned char t0_count,disp_i=0,mask=0xfe;
   static unsigned char t0_count,disp_i=0,mask=0x01;
   TH0=hi;TL0=lo;t0_count++;
   if(t0_count==20)
     {t0_count=0;shift(ledk[disp_i]);P2=~mask;
	  mask=mask<<1;if(mask==0x10)mask=0x01;
      //mask=_crol_(mask,1);if(mask==0xef)mask=0xfe;
      disp_i++;if(disp_i>15)disp_i=0;} }
void main(void)
{TMOD=0x01;TH0=hi;TL0=lo;EA=1;ET0=1;TR0=1,P2=0xfe;
while(1)
  {; }		   
 }