键功能_2.txt

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

程序6
//key_164_led_3
#include <stdio.h>
#include <reg51.h>
#include <intrins.h>
#define hi 0x3c
#define lo 0xb0
unsigned char ledk[11]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0xf3};
unsigned char key,mask=0xee;set_no=0;key_flag,key_count,led_no,set_flag=0,t0_count;
unsigned char disp[4]={0,0,0,0},dd;
sbit P37=P3^7;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(dd)
{static unsigned char d;
   unsigned char j=0;
    d=dd;
   	while(j<8)
	{if((d&0x80)!=0) sda=1;
       else  sda=0;
	   clk=0;clk=1;
	   d<<=1;j++;}  }
unsigned char get_char()
{unsigned char key_code;
  static unsigned char column=0;
  if (P37==0 && key_flag==1){key_code=column;key_flag=0;key_count=0;}
     else key_code=0xff;
  mask=_crol_(mask,1);
  column++; if(column>3)column=0;led_no++;if(led_no>3)led_no=0; 
  return(key_code);}
void key_func(key)
 {switch (key)
   {case 0:  set_flag=1;set_no++;if(set_no>3)set_no=0;break;
    case 1:  if(set_flag==1)disp[set_no]++;
	         if (disp[set_no]>9)disp[set_no]=0;
	         break;
    case 2:  if(set_flag==1)disp[set_no]--;
             if (disp[set_no]<0)disp[set_no]=9;
             break;
    case 3:  set_flag=0;break;
    default: break;               }  }
void t1() interrupt 3 
 {TH1=hi;TL1=lo;key_count++;t0_count++;
   if(t0_count==20)t0_count=0;  }
void main(void)
 { TMOD=0x10;TH1=hi;TL1=lo;EA=1;ET1=1;TR1=1; 
    while(1)
     {key=get_char( );delay(20);key_func(key);
     if(t0_count%4==0 && set_flag==1 && led_no==set_no)shift(0);//off
     	      else {dd=ledk[disp[led_no]];shift(dd);}
	 P2=mask; 
     if(key_flag==0 && key_count==10 && P37==1)key_flag=1;}		   
 }