单片机矩阵键盘程序检测并用数码管显示程序

1、#include<reg52.h>#define uint16 unsigned int#define uint8 unsigned char/控制数码管段选锁存口sbit P3_7=P37;/共阴数码管显示uint8 code table=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0;uint8 temp;uint16 num;/延时子函数void delay(uint16 z)uint16 x,y;for(x=z;x>0;x-)for(y=110;y>

2、;0;y-);/子函数声明uint8 keyscan();void display(uint8);void main()num=17;while(1)display(keyscan();void display(uint8 num1)P2=0xf8;P3_7=1;P0=tablenum1-1;P3_7=0;uint8 keyscan()P1=0xfe;temp = P1;temp=temp&0xf0;while(temp!=0xf0)delay(5);temp=P1;temp=temp&0xf0;while(temp!=0xf0)temp=P1;switch(temp)case

3、 0xee:num=1;break;case 0xde:num=2;break;case 0xbe:num=3;break;case 0x7e:num=4;break;default:break;while(temp!=0xf0)/检测按键是否放开temp=P1;temp=temp&0xf0;P1 = 0xfd;temp = P1;temp=temp&0xf0;while(temp!=0xf0)delay(5);temp=P1;temp=temp&0xf0;while(temp!=0xf0)temp=P1;switch(temp)case 0xed:num=5;brea

4、k;case 0xdd:num=6;break;case 0xbd:num=7;break;case 0x7d:num=8;break;default:break;while(temp!=0xf0)/检测按键是否放开temp=P1;temp=temp&0xf0;P1 = 0xfb;temp = P1;temp=temp&0xf0;while(temp!=0xf0)delay(5);temp=P1;temp=temp&0xf0;while(temp!=0xf0)temp=P1;switch(temp)case 0xeb:num=9;break;case 0xdb:num=

5、10;break;case 0xbb:num=11;break;case 0x7b:num=12;break;default:break;while(temp!=0xf0)/检测按键是否放开temp=P1;temp=temp&0xf0;P1 = 0xf7;temp = P1;temp=temp&0xf0;while(temp!=0xf0)delay(5);temp=P1;temp=temp&0xf0;while(temp!=0xf0)temp=P1;switch(temp)case 0xe7:num=13;break;case 0xd7:num=14;break;case 0xb7:num=15;break;case 0x77:num=16;bre