蓝球24秒计时器 源程序和电路图初学51用延时做的24秒计时器

#include<AT89X51.H>

unsigned  char  code  time[]={0x59,0x58,0x57,0x56,0x55,0x54,0x53,0x52,0x51,0x50,0x49,0x48,0x47,

0x46,0x45,0x44,0x43,0x42,0x41,0x39,0x38,0x37,0x36,0x35,0x34,0x33,0x32,0x31,0x30,0x29,0x28,0x27,0x26,0x25,0x24,0x23,0x22,0x21,0x20,0x19,0x18,0x17,0x16,0x15,0x14,0x13,0x12,0x11,0x10,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x01,0x00};

unsigned  char  Second;

unsigned  char  timer;

unsigned  char  fen;

void  delays()

{

unsigned  char  i,j,k;

for(k=100;k>0;k--)

for(i=20;i>0;i--)

for(j=248;j>0;j--);

}

void  main()

{

TMOD=0X02;

EX0=1;

EA=1;

fen=47;

timer=0;

Second=34;

P2=time[Second];

P1=time[timer];

P0=time[fen];

while(1)

{

delays();

Second++;

timer++;

if(Second==59)

{

Second=34;

}

P2=time[Second];

if(timer==59)

{

++fen;

timer=0;

}

if(fen==59)  fen=47;

P1=time[timer];

P0=time[fen];

}

}

void  int0()  interrupt  0  using  0

{

Second=34;

P2=time[Second];

}