#include

unsigned char led[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

void led_display(unsigned char num);

unsigned char key_scan();

unsigned char temp,key;

sbit led1=P2^0;

sbit led2=P2^1;

void main()

{

unsigned char led_key;

P1=0;

while(1)

{

led_key=key_scan();

led_display(key);

}

}

void led_display(unsigned char num)

{

unsigned char ten,single;

int delay;

ten=num/10;

single=num%10;

delay=100;

for(delay=200;delay>0;delay--)

{

P0=led[ten];

led1=0;

led1=1;

P0=led[single];

led2=0;

led2=1;

}

}

/////////////////////////////////////////

unsigned char key_scan(void)

{

P1=0xfe;

temp=P1&0xf0;

if(temp!=0xf0)

{

switch(temp)

{

case 0xe0: key=1;

break;

case 0xd0: key=2;

break;

case 0xb0: key=3;

break;

case 0x70: key=4;

}

return key;

}

P1=0xfd;

temp=P1&0xf0;

if(temp!=0xf0)

{

switch(temp)

{

case 0xe0: key=5;

break;

case 0xd0: key=6;

break;

case 0xb0: key=7;

break;

case 0x70: key=8;

}

return key;

}

P1=0xfb;

temp=P1&0xf0;

if(temp!=0xf0)

{

switch(temp)

{

case 0xe0: key=9;

break;

case 0xd0: key=10;

break;

case 0xb0: key=11;

break;

case 0x70: key=12;

}

return key;

}

P1=0xf7;

temp=P1&0xf0;

if(temp!=0xf0)

{

switch(temp)

{

case 0xe0: key=13;

break;

case 0xd0: key=14;

break;

case 0xb0: key=15;

break;

case 0x70: key=16;

}

return key;

}

}