///下面代码显示0-f 16个字符
#include <reg51.h>
typedef unsigned int u16;
typedef unsigned char u8;
u8 i=0;
sbit k10=P1^0;
sbit k11=P1^1;
sbit k12=P1^2;
sbit k13=P1^3;
sbit k14=P1^4;
sbit k15=P1^5;
sbit k16=P1^6;
sbit k17=P1^7;
u8 knum=0;
void delay(u8 i)
{
while(i–);
}
void Delay1ms() //@12.000MHz
{
unsigned char i, j;
i = 12;
j = 169;
do
{
while (--j);
} while (--i);
}
void delay1s(void) //ÑÓ³Ù1s£¬Îó²î 0us
{
unsigned char a,b,c;
for(c=167;c>0;c–)
for(b=171;b>0;b–)
for(a=16;a>0;a–);
}
char code num[17]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0xff};
//ÊýÂë¹Ü 0-f 16¸öÊý£¬¼Ó0xff²»ÏÔʾ
//¼Ó¸öcode Ö¸ÁnumÕâ¸öÊý×é·Åµ½code¶ÎÄÚ¾ÍÊÇrom¶Î¡£
void PressNum(u8 n)//n±íʾµÚ¼¸ÐУ¬Ö»È¡0-3
{
if(k13
0)
{
delay(1000);//Èí¼þÏû¶¶
if(k13
0)
{
delay(2000);//Èí¼þÏû¶¶;
knum=4*n;
return;
}
}
if(k12
0)
{
delay(1000);//Èí¼þÏû¶¶
if(k12
0)
{
delay(2000);//Èí¼þÏû¶¶
knum=4*n+1;
return;
}
}
if(k11==0)
{
delay(1000);//Èí¼þÏû¶¶
if(k11==0)
{
delay(2000);//Èí¼þÏû¶¶
knum=4*n+2;
return;
}
}
if(k10==0)
{
delay(1000);//Èí¼þÏû¶¶
if(k10==0)
{
delay(2000);//Èí¼þÏû¶¶
knum=4*n+3;
return;
}
}
}
u8 KeyMatrix()//¾ØÕó°´¼ü,·µ»ØֵΪ¾ØÕó°´¼üµÄÐòºÅ
{
//
//ÖðÐÐɨÃ裺ÎÒÃÇ¿ÉÒÔͨ¹ý¸ßËÄλÂÖÁ÷Êä³öµÍµçƽÀ´¶Ô¾ØÕó¼üÅ̽øÐÐÖðÐÐɨÃ裬
//µ±µÍËÄλ½ÓÊÕµ½µÄÊý¾Ý²»È«Îª1µÄʱºò£¬ËµÃ÷Óа´¼ü°´Ï£¬
//È»ºóͨ¹ý½ÓÊÕµ½µÄÊý¾ÝÊÇÄÄһλΪ0À´ÅжÏÊÇÄÄÒ»¸ö°´¼ü±»°´Ï¡£
knum=0xff;
k14=0;
PressNum(3);//µÚ3ÐеÄ4ÁÐÅжÏ
k14=1;
if(knum<0xff)
{
return knum;
}
k15=0;
PressNum(2);//µÚ2ÐеÄ4ÁÐÅжÏ
k15=1;
if(knum<0xff)
{
return knum;
}
k16=0;
PressNum(1);//µÚ1ÐеÄ4ÁÐÅжÏ
k16=1;
if(knum<0xff)
{
return knum;
}
k17=0;
PressNum(0);//µÚ0ÐеÄ4ÁÐÅжÏ
k17=1;
if(knum<0xff)
{
return knum;
}
return 0xff;//ÉÏÃæµÄ¶¼²»·µ»Ø¾ÍÊÇûÓа´Ï°´¼ü£¬·µ»ØΪ0
}
void main()
{
u8 key;
P0=0;
while(1)
{
P1=0xff;
key=KeyMatrix();//key¾ÍÊÇ°´¼ü·µ»ØÖµ
if(key<0xf1)
{
P0=num[key];//¾²Ì¬ÊýÂë¹ÜÏÔʾ
}
}
}