代碼如下：

//采用BCD碼格式顯示00~59簡易密碼秒表程序

#include

void delay1s() {

unsigned char i;

TMOD = 0x00;

for (i=0; i<0xc8; i++) {

TH1 = 0x63;

TL1 = 0x18;

TR1 = 1;

while(!TF1);

TF1 = 0;

}

}

void main () {

unsigned char i, t;

// TMOD = 0x10;

while (1) {

for (i=0; i<60; i++) {

t = (((i/10)<<4) | (i));

P1 = ~t;

delay1s();

}

}

}