4*4单片机矩阵按键数码管显示0-F字码 Keil程序+Proteus仿真 -

/**********************************************************
程序功能：4*4矩阵键盘按照行扫描的方式进行按键的确定
本程序适应上次正反转电平的方式进行确定按键的Protues仿真图
***********************************************************/
#include<reg52.h> //头文件
#define uchar unsigned char //宏定义
#define uint unsigned int
//0-F字码
uchar code table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};
void delay(uint z)
{
uint x,y;
for(x=0;x<z;x++)
for(y=0;y<123;y++);
}
void main(void)
{
while(1)
{
P1 = 0XF0;
if(P1 != 0XF0)
{
delay(5);
if(P1 != 0XF0)
{
P1 = 0xEF;
if(P1 != 0xEF)
{
switch(P1)
{
case 0xEE:P2 = 0;P0 = table[0];while(P1 == 0XEE);break;
case 0xED:P2 = 0;P0 = table[4];while(P1 == 0XED);break;
case 0xEB:P2 = 0;P0 = table[8];while(P1 == 0XEB);break;
case 0xE7:P2 = 0;P0 = table[12];while(P1 == 0XE7);break;
}
}
P1 = 0xDF;
if(P1 != 0xDF)
{
switch(P1)
{
case 0xDE:P2 = 0;P0 = table[1];while(P1 == 0xDE);break;
case 0xDD:P2 = 0;P0 = table[5];while(P1 == 0xDD);break;
case 0xDB:P2 = 0;P0 = table[9];while(P1 == 0xDB);break;
case 0xD7:P2 = 0;P0 = table[13];while(P1 == 0xD7);break;
}
}
P1 = 0xBF;
if(P1 != 0xBF)
{
switch(P1)
{
case 0xBE:P2 = 0;P0 = table[2];while(P1 == 0xBE);break;
case 0xBD:P2 = 0;P0 = table[6];while(P1 == 0xBD);break;
case 0xBB:P2 = 0;P0 = table[10];while(P1 == 0xBB);break;
case 0xB7:P2 = 0;P0 = table[14];while(P1 == 0xB7);break;
}
}
P1 = 0x7F;
if(P1 != 0x7F)
{
switch(P1)
{
case 0x7E:P2 = 0;P0 = table[3];while(P1 == 0x7E);break;
case 0x7D:P2 = 0;P0 = table[7];while(P1 == 0x7D);break;
case 0x7B:P2 = 0;P0 = table[11];while(P1 == 0x7B);break;
case 0x77:P2 = 0;P0 = table[15];while(P1 == 0x77);break;
}
}
}
}
}
}

复制代码