STC-51开发板-单片机控制数码管&按键&点阵综合操作

操作：

实现按下一个按键，对应的数码管和点阵显示相应的数字

代码：

/*  *******************数码管按键综合项目********************* */

#include <reg52.h>

int local(unsigned int i);

sbit ADDR0 = P1^0; sbit ADDR1 = P1^1; sbit ADDR2 = P1^2; sbit ADDR3 = P1^3; sbit ENLED = P1^4;

sbit key1 = P2^4; sbit key2 = P2^5; sbit key3 = P2^6;

unsigned char leds[] = {  0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8,  0x80, 0x90, 0x88, 0x83, 0xC6, 0xA1, 0x86, 0x8E };

unsigned char ledss[10][8]={  {0xAA,0x55,0xAA,0x55,0xAA,0x55,0xAA,0x55},  {0xE7,0xE3,0xE7,0xE7,0xE7,0xE7,0xE7,0xC3},  {0x81,0x81,0x9F,0x81,0x81,0xF9,0x81,0x81},  {0x81,0x81,0x9F,0x81,0x81,0x9F,0x81,0x81},  {0x8F,0x87,0x93,0x99,0x9C,0x00,0x00,0x9F},  {0x81,0x81,0xF9,0x81,0x81,0x9F,0x81,0x81},  {0x81,0x81,0xF9,0x81,0x81,0x99,0x81,0x81},  {0x83,0x83,0x9F,0x9F,0x9F,0x9F,0x9F,0x9F},  {0x81,0x81,0x99,0x81,0x81,0x99,0x81,0x81},  {0x81,0x81,0x99,0x81,0x81,0x9F,0x81,0x81}, };

unsigned int locals = 0;

void main() {

 ADDR3 = 0;  

ENLED = 0;

 EA = 1;  

TMOD = 0x01;

 ET0 = 1;  

TH0 = 0xFC;  

TL0 = 0x67;  

TR0 = 1;

 //开启九位输入键，其它键关闭

 P2 = 0xF1;

 while(1)  { 

//得到键位所在KeyIn1输入列  

 if(key1==0)  

 {    locals = local(1);

   TR0 = 1;      

 }   

//得到键位所在KeyIn2输入列  

 else if(key2==0)   {    

locals = local(2);    

TR0 = 1;    }   

//得到键位所在KeyIn3输入列  

 else if(key3==0)   {   

 locals = local(3);    

TR0 = 1;  

 }

 }

 //对应键位赋值数码管

}

void InterruptTimer0() interrupt 1 {

 static unsigned char i = 0;  

TH0 = 0xFC;  TL0 = 0x67;  P0 = 0xFF;  ADDR3 = 0;

 switch(i)  {  

 case 0: ADDR0 = 0;ADDR1 = 0;ADDR2 = 0; P0 = ledss[locals][i];i++;break;  

 case 1: ADDR0 = 1;ADDR1 = 0;ADDR2 = 0; P0 = ledss[locals][i];i++;break;   

case 2: ADDR0 = 0;ADDR1 = 1;ADDR2 = 0; P0 = ledss[locals][i];i++;break;   

case 3: ADDR0 = 1;ADDR1 = 1;ADDR2 = 0; P0 = ledss[locals][i];i++;break;   

case 4: ADDR0 = 0;ADDR1 = 0;ADDR2 = 1; P0 = ledss[locals][i];i++;break;  

 case 5: ADDR0 = 1;ADDR1 = 0;ADDR2 = 1; P0 = ledss[locals][i];i++;break;  

 case 6: ADDR0 = 0;ADDR1 = 1;ADDR2 = 1; P0 = ledss[locals][i];i++;break;   

case 7: ADDR0 = 1;ADDR1 = 1;ADDR2 = 1; P0 = ledss[locals][i];i++;break;   

case 8: ADDR3 = 1;ADDR0 = 0;ADDR1 = 0;ADDR2 = 0; P0 = leds[locals];i++;break;    

 case 9: ADDR3 = 1;ADDR0 = 1;ADDR1 = 0;ADDR2 = 1; P0 = leds[locals];i=0;break;   default: break;  } }

int local(unsigned int i) {

 unsigned int b;  

//判断当前键位

 switch(i)  {

//得到键位所在KeyIn1输入列

 case 1:      

P2 = 0xF7;  //仅仅开启out1    

 if(key1 == 0){      b = 1;     }     

P2 = 0xFB;  //仅仅开启out2     

if(key1 == 0){      b = 4;     }   

 P2 = 0xFD;  //仅仅开启out3    

 if(key1 == 0){      b = 7;     }   break;

//得到键位所在KeyIn2输入列  

 case 2:      

P2 = 0xF7;  //仅仅开启out1     

if(key2 == 0){      b = 2;     }     

P2 = 0xFB;  //仅仅开启out2     

if(key2 == 0){      b = 5;     }    

P2 = 0xFD;  //仅仅开启out3    

 if(key2 == 0){      b = 8;     }      

 break;

//得到键位所在KeyIn3输入列   

case 3:    

P2 = 0xF7;  //仅仅开启out1    

 if(key3 == 0){      b = 3;     }    

 P2 = 0xFB;  //仅仅开启out2    

 if(key3 == 0){      b = 6;        }    

P2 = 0xFD;  //仅仅开启out3     

if(key3 == 0){      b = 9;     }   

 break;

  default: break;  }

 //重置开启九位输入键，其它键关闭

 P2 = 0xF1;  

return b; }