#include<reg51.h>
int i,a,b,c;
void KEY_16();
char code tab1[16]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E};
void delay(int z)
{
int x,y;
for(x=0;x<z;x++)
for(y=0;y<120;y++);
}
void main()
{
while(1)
{
KEY_16();
P0=tab1[i];
}
}
void KEY_16()
{
int a;
P1=0x0f;
if(P1!=0x0f)
{
delay(1);
if(P1!=0x0f)
{
P1=0x0f;
switch(P1)
{
case(0x0e):i=0;break;
case(0x0d):i=4;break;
case(0x0b):i=8;break;
case(0x07):i=12;break;
}
P1=0xf0;
switch(P1)
{
case(0x70):i=i+3;break;
case(0xb0):i=i+2;break;
case(0xd0):i=i+1;break;
case(0xe0):i=i;break;
}
while(P1!=0xf0)
{
delay(1);
a++;
}
a=0;
}
}
}
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