key4x40.c

4X4矩阵键盘的驱动

#include<key4X4.h>
#include<reg51.h>
#include<74hc595.h>

uchar key;
sbit  gw=P1^3;    //个位显示控制脚
sbit  sw=P1^4;    //十位

/*void display(uchar	led)
{
	dsout(tab[led]);
	gw=1;
	delay(5);
	gw=0;
}  */
/************************************************************************************************************/
void display(uchar led)
{
	dsout(tab[led%10]);
	gw=0;
	delay(10);
	gw=1;
	dsout(tab[led/10]);
	sw=0;
	delay(10);
	sw=1;
}

void keynum()
{
	key=keyscan();
	delay(10);
	switch(key)
	  {
	  	case 0x88:	display(3);		break;
	 	case 0x84:	display(7);		break;
	 	case 0x82:	display(11);		break;
	 	case 0x81:	display(15);		break;
	 	case 0x48:	display(2);		break;
	 	case 0x44:	display(6);		break;
	 	case 0x42:	display(10);		break;
	 	case 0x41:	display(14);		break;
	 	case 0x28:	display(1);		break;
	 	case 0x24:	display(5);		break;
	 	case 0x22:	display(9);	break;
	 	case 0x21:	display(13);	break;
	 	case 0x18:	display(0);	break;
	 	case 0x14:	display(4);	break;
	 	case 0x12:	display(8);	break;
	 	case 0x11:	display(12);	break;
	 	default  :			break;	  
	  }
}

void main()
{  	
	while(1)
	{			
		keynum();		
	}
}