矩阵键盘.c

单片机C源程序+HEX文件。配合实验板。需要的话加Q:394011495.并注明。

//16个按键对应0-F。
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit rclk=P1^4;
sbit srclk=P1^7;
sbit ser=P1^5; 
uchar dat,k,duantable[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,
0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};  //数字编码
uint i;
void delay(uchar x)		  //延时函数
{
	uchar a,b;
	for(a=x;a>0;a--)
		for(b=100;b<0;b--) ;
}
void display(uchar x)       //显示函数
{
	k=0x00;
	for(i=0;i<8;i++)
	{
		srclk=0;
		k=k<<1;
		ser=CY;
		srclk=1;
	}
	k=duantable[x];
	for(i=0;i<8;i++)
	{
		srclk=0;
		k=k<<1;
		ser=CY;
		srclk=1;
	}
	rclk=0;
	rclk=1;		
}

void init()		  //初始化
{
	k=0xff;
	for(i=0;i<8;i++)
	{
		srclk=0;
		k=k<<1;
		ser=CY;
		srclk=1;
	}
	k=0x00;
	for(i=0;i<8;i++)
	{
		srclk=0;
		k=k<<1;
		ser=CY;
		srclk=1;
	}
	rclk=0;
	rclk=1;	
}
void main()
{
	init();          
	while(1)		//键盘循环扫描
	{
		P0=0x7f;
		dat=0x7f;
		dat=P0&0x7f;
		while(dat!=0x7f)	
		{
			delay(100);
			switch(dat)
			{
				case 0x77:
				display(15);
				break;
				case 0x7b:
				display(14);
				break;
				case 0x7d:
				display(13);
				break;
				case 0x7e:
				display(12);
				break;	
			}
			break;
		}
		P0=0xbf;
		dat=0xbf;
		dat=P0&0xbf;
		while(dat!=0xbf)
		{
			delay(100);
			switch(dat)
			{
				case 0xb7:
				display(11);
				break;
				case 0xbb:
				display(10);
				break;
				case 0xbd:
				display(9);
				break;
				case 0xbe:
				display(8);
				break;	
			}
			break;
		}
		P0=0xdf;
		dat=0xdf;
		dat=P0&0xdf;
		while(dat!=0xdf)
		{
			delay(100);
			switch(dat)
			{
				case 0xd7:
				display(7);
				break;
				case 0xdb:
				display(6);
				break;
				case 0xdd:
				display(5);
				break;
				case 0xde:
				display(4);
				break;	
			}
			break;
		}
		P0=0xef;
		dat=0xef;
		dat=P0&0xef;
		while(dat!=0xef)
		{
			delay(100);
			switch(dat)
			{
				case 0xe7:
				display(3);
				break;
				case 0xeb:
				display(2);
				break;
				case 0xed:
				display(1);
				break;
				case 0xee:
				display(0);
				break;	
			}
			break;
		}
	}
}