矩阵键盘在数码管上显示1-16

#include 

#include "./delay/delay.h"

#define PORTLEN P0
#define KEYPORT P1

sbit bit_select = P2^0;
sbit seg_select = P2^1;

unsigned char duanma[16] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
unsigned char weima[8] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned char qrc[2] = {0x3f,0x3f};

void timer0_init(void)
{
    EA = 1;

    TMOD |= 0x01;
    TH0 = (65536 - 2000) / 256;
    TL0 = (65536 - 2000) % 256;
    ET0 = 1;
    TR0 = 1;
}

void display()
{  

    static unsigned char i = 0;
    PORTLEN = 0x0;
    seg_select = 1;
    seg_select = 0; 
			
    PORTLEN = 0xff;
    bit_select = 1;
    bit_select = 0;
			
    PORTLEN = qrc[i];
    seg_select = 1;
    seg_select = 0;
					
    PORTLEN = weima[i];
    bit_select = 1;
    bit_select = 0;
	  
    i++;
    if(2 == i)
    {
	i = 0;
    }
}

unsigned char key_scan(void)
{
    unsigned char keyvalue;
    KEYPORT = 0xf0;
    if(0xf0 != KEYPORT)
    {
        delay_ms(10);
	if(0xf0 != KEYPORT)
	{
	    KEYPORT = 0xfe;
	    if(0xfe != KEYPORT)
	    {
		keyvalue = KEYPORT;
		keyvalue &= 0xf0;
		keyvalue += 0x0e;
		while(0xfe != KEYPORT);
		delay_ms(10);
		while(0xfe != KEYPORT);
		return keyvalue;
	    }
	    KEYPORT = 0xfd;
	    if(0xfd != KEYPORT)
	    {
		keyvalue = KEYPORT;
	        keyvalue &= 0xf0;
		keyvalue += 0x0d;
		while(0xfd != KEYPORT);
	        delay_ms(10);
		while(0xfd != KEYPORT);
		return keyvalue;
	    }
	    KEYPORT = 0xfb;
	    if(0xfb != KEYPORT)
	    {
		keyvalue = KEYPORT;
	        keyvalue &= 0xf0;
		keyvalue += 0x0b;
		while(0xfb != KEYPORT);
		delay_ms(10);
		while(0xfb != KEYPORT);
		return keyvalue;
	    }
	    KEYPORT = 0xf7;
	    if(0xf7 != KEYPORT)
	    {
		keyvalue = KEYPORT;
		keyvalue &= 0xf0;
		keyvalue += 0x07;
		while(0xf7 != KEYPORT);
		delay_ms(10);
		while(0xf7 != KEYPORT);
		return keyvalue;
	    }
	}
    }
    return 0xff;
}

unsigned char key_pro()
{
    unsigned char keynum;
    keynum = key_scan();
    switch(keynum)
    {
	case 0x7e:return 1;break;
	case 0xbe:return 2;break;
	case 0xde:return 3;break;
	case 0xee:return 4;break;
	case 0x7d:return 5;break;
        case 0xbd:return 6;break;
        case 0xdd:return 7;break;
        case 0xed:return 8;break;
        case 0x7b:return 9;break;
        case 0xbb:return 10;break;
        case 0xdb:return 11;break;
        case 0xeb:return 12;break;
        case 0x77:return 13;break;
        case 0xb7:return 14;break;
	case 0xd7:return 15;break;
	case 0xe7:return 16;break;
	default:return 0xff;break;
    }
}

void main()
{
    unsigned char key;
    timer0_init();
    while(1)
    {
        key = key_pro();
	if(0xff != key)
	{
	    qrc[0] = duanma[key / 10];
	    qrc[1] = duanma[key % 10];
	}
    }
}

void timer0_isr(void) interrupt 1
{
    TH0 = (65536 - 2000) / 256;
    TL0 = (65536 - 2000) % 256;
    display();
}

delay.c文件前面文档有写