#include <AT89X52.H>
unsigned char tab[] = {
0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,
0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,0xFF,0x00};
void delayms(unsigned int t)
{
unsigned char a,b,c,d;
for(d=t;d>0;d--)
for(c=1;c>0;c--)
for(b=222;b>0;b--)
for(a=12;a>0;a--);
}
void main (void)
{
unsigned char size = sizeof(tab)/sizeof(tab[0]);
unsigned char i = 0;
unsigned char state = 0;
while(1)
{
if(0 == P1_0)
{
delayms(10);
if(0 == P1_0)
{
for(i=0;i<100;i++)
if(0==P1_0)i = 0;
}
state = 0;
}
if(0 == P1_1)
{
delayms(10);
if(0 == P1_1)
{
for(i=0;i<100;i++)
if(0==P1_1)i = 0;
}
state += 1;
}
if(0 == P1_2)
{
delayms(10);
if(0 == P1_2)
{
for(i=0;i<100;i++)
if(0==P1_2)i = 0;
}
state -= 1;
}
if(0 == P1_3)
{
delayms(10);
if(0 == P1_3)
{
for(i=0;i<100;i++)
if(0==P1_3)i = 0;
}
state = size-1;
}
state %= size;
P0 = ~tab[state];
}
}
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