stc15矩阵扫描写法

#include

#define uint unsigned int//宏命令 定义

#define uchar unsigned char

sfr AUXR = 0x8E;

sfr P4 = 0xC0; //P4

sbit a=P2^5;

sbit b=P2^6;

sbit c=P2^7;

//4行

sbit r1=P3^0;

sbit r2=P3^1;

sbit r3=P3^2;

sbit r4=P3^3;

//4列

sbit c1=P4^4;

sbit c2=P4^2;

sbit c3=P3^5;

sbit c4=P3^4;

void delay(uint z)

{

uint x,y;

for(x=z;x>0;x--)

for(y=110;y>0;y--);

}

void led()//led灯（通过译码器）

{

a=0;

b=0;

c=1;

}

void feng()//蜂鸣器(-)

{

a=1;

b=0;

c=1;

}

void wei()//数码管位选（-）

{

a=0;

b=1;

c=1;

}

void duan()//数码管段选（-）

{

a=1;

b=1;

c=1;

}

unsigned char tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,

0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};

unsigned int temp,num;

uint home,mo,num,key;

unsigned char key_scan()

{

unsigned char key_value;

delay(1);

r1=0;

r2=r3=r4=1;

c1=c2=c3=c4=1;

if(!c1){key_value=0;delay(5);}

else if(!c2){key_value=1;delay(5);}

else if(!c3){key_value=2;delay(5);}

else if(!c4){key_value=3;delay(5);}

delay(1);

r2=0;

r1=r3=r4=1;

c1=c2=c3=c4=1;

if(!c1){key_value=4;delay(5);}

else if(!c2){key_value=5;delay(5);}

else if(!c3){key_value=6;delay(5);}

else if(!c4){key_value=7;delay(5);}

delay(1);

r3=0;

r2=r1=r4=1;

c1=c2=c3=c4=1;

if(!c1){key_value=8;delay(5);}

else if(!c2){key_value=9;delay(5);}

else if(!c3){key_value=10;delay(5);}

else if(!c4){key_value=11;delay(5);}

delay(1);

r4=0;

r2=r3=r1=1;

c1=c2=c3=c4=1;

if(!c1){key_value=12;delay(5);}

else if(!c2){key_value=13;delay(5);}

else if(!c3){key_value=14;delay(5);}

else if(!c4){key_value=15;delay(5);}

key=key_value;

return key_value;

}

void main()

{

feng();

P0=0x20;

led();

P0=0xff;

wei();

P0=0xff;

duan();

P0=0xbf;

while(1)

{

key_scan();

duan();

P0=tab[key];

}

}

#include

#define uint unsigned int//宏命令 定义

#define uchar unsigned char

sfr AUXR = 0x8E;

sfr P4 = 0xC0; //P4

sbit a=P2^5;

sbit b=P2^6;

sbit c=P2^7;

//4行

sbit r1=P3^0;

sbit r2=P3^1;

sbit r3=P3^2;

sbit r4=P3^3;

//4列

sbit c1=P4^4;

sbit c2=P4^2;

sbit c3=P3^5;

sbit c4=P3^4;

void delay(uint z)

{

uint x,y;

for(x=z;x>0;x--)

for(y=110;y>0;y--);

}

void led()//led灯（通过译码器）

{

a=0;

b=0;

c=1;

}

void feng()//蜂鸣器(-)

{

a=1;

b=0;

c=1;

}

void wei()//数码管位选（-）

{

a=0;

b=1;

c=1;

}

void duan()//数码管段选（-）

{

a=1;

b=1;

c=1;

}

unsigned char tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,

0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};

unsigned int temp,num;

uint home,mo,num,key;

unsigned char key_scan()

{

unsigned char key_value;

delay(1);

r1=0;

r2=r3=r4=1;

c1=c2=c3=c4=1;

if(!c1){key_value=0;delay(5);}

else if(!c2){key_value=1;delay(5);}

else if(!c3){key_value=2;delay(5);}

else if(!c4){key_value=3;delay(5);}

delay(1);

r2=0;

r1=r3=r4=1;

c1=c2=c3=c4=1;

if(!c1){key_value=4;delay(5);}

else if(!c2){key_value=5;delay(5);}

else if(!c3){key_value=6;delay(5);}

else if(!c4){key_value=7;delay(5);}

delay(1);

r3=0;

r2=r1=r4=1;

c1=c2=c3=c4=1;

if(!c1){key_value=8;delay(5);}

else if(!c2){key_value=9;delay(5);}

else if(!c3){key_value=10;delay(5);}

else if(!c4){key_value=11;delay(5);}

delay(1);

r4=0;

r2=r3=r1=1;

c1=c2=c3=c4=1;

if(!c1){key_value=12;delay(5);}

else if(!c2){key_value=13;delay(5);}

else if(!c3){key_value=14;delay(5);}

else if(!c4){key_value=15;delay(5);}

key=key_value;

return key_value;

}

void main()

{

feng();

P0=0x20;

led();

P0=0xff;

wei();

P0=0xff;

duan();

P0=0xbf;

while(1)

{

key_scan();

duan();

P0=tab[key];

}

}