#include

typedefunsignedcharuchar;

typedefunsignedintuint;

#defineNOKEY0

#defineKEYDOWN1

#defineKEYUP2

ucharkeystate;

sbitkey=P2^7;

voidkeyscan(void);

uchartimeflag;

ucharcodetable[]=

{

0x80,0xf2,0x48,0x60,

0x32,0x24,0x04,0xf0,

0x00,0x20,0x10,0x06,

0x8c,0x42,0x0c,0x1c

};

uchari;

voidmain(void)

{

TMOD=0x10;

TH1=(65536-50000)/256;

TL1=(65536-50000)%256;

EA=1;

ET1=1;

TR1=1;

while(1)

{

if(timeflag)

{

timeflag=0;

keyscan();

}

}

}

voidkeyscan(void)

{

staticuchariscontinue=0;

P2|=0x80;

switch(keystate)

{

caseNOKEY:

if(key==0)

{

keystate=KEYDOWN;

return;

}

else

{

keystate=NOKEY;

return;

}

caseKEYDOWN:

if(key==0)

{

keystate=KEYUP;

return;

}

else

{

keystate=NOKEY;

return;

}

caseKEYUP:

if(key==0)

{

keystate=KEYUP;

iscontinue++;

if(iscontinue==255)

iscontinue=60;

if(iscontinue>=60)

{

if(iscontinue%10==0)

{

P2+=1;

P1=table[i++];

if(i>=16)

i=0;

}

}

return;

}

else

{

keystate=NOKEY;

if(iscontinue<60)

{

P2+=1;

P1=table[i++];

if(i>=16)

i=0;

}

iscontinue=0;

return;

}

}

}

voidtimer1isr()interrupt3

{

TH1=(65536-50000)/256;

TL1=(65536-50000)%256;

timeflag=1;

}