矩阵键盘及其数码管显示

1、矩阵键盘及其数码管显示电路图如上图所示。程序是用C语言编写的。程序如下：#include<reg52.h>#define uint unsigned int#define uchar unsigned charuchar code table=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c, 0x39,0x5e,0x79,0x71,0x00;sbit wela=P27;sbit dula=P26;uchar num=17,temp;void delay(uint z);void main()wela=1;P1=

2、0xc0;wela=0;dula=1;P1=0x00;dula=0;while(1)P3=0xfe;temp=P3;temp=temp&0xfe;while(temp!=0xfe)delay(5);temp=P3;switch(temp)case 0xee: num=1; break;case 0xde: num=2; break;case 0xbe: num=3; break;case 0x7e: num=4; break;while(temp!=0xfe)temp=P3;temp=temp&0xfe; dula=1;P1=tablenum-1;dula=0;P3=0xfd;

3、temp=P3;temp=temp&0xfd;while(temp!=0xfd)delay(5);temp=P3;switch(temp)case 0xed: num=5; break;case 0xdd: num=6; break;case 0xbd: num=7; break;case 0x7d: num=8; break;while(temp!=0xfd)temp=P3;temp=temp&0xfd;dula=1;P1=tablenum-1;dula=0;P3=0xfb;temp=P3;temp=temp&0xfb;while(temp!=0xfb)delay(5

4、);temp=P3;switch(temp)case 0xeb: num=9; break;case 0xdb: num=10; break;case 0xbb: num=11; break;case 0x7b: num=12; break;while(temp!=0xfb)temp=P3;temp=temp&0xfb;dula=1;P1=tablenum-1;dula=0;P3=0xf7;temp=P3;temp=temp&0xf7;while(temp!=0xf7)delay(5);temp=P3;switch(temp)case 0xe7: num=13; break;case 0xd7: num=14; break;case 0xb7: num=15; break;case 0x77: num=16; break;while(temp!=0xf7)temp=P3;temp=temp&0xf7;dula=1;P1=tablenum-1;dula