单片机时钟显示(c语言编程)

刚开始学单片机，老师让做一个简单的时钟程序！！

#include"reg51.h"

sbit TIMESTOP_K = P1^0;

void Delay2ms(unsigned int DelayTime)

{

unsigned int Count;

for(Count = 0;Count < DelayTime*50;Count++);

}

code unsigned char LedSeg[10] = {0x3f,0x06,0x5B,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

main()

{

unsigned int Counter = 0;

unsigned char Sec = 0,Min = 0;

bit StopFlag = 0; //0: Time Run 1:Time Stop

while(1)

{ //显示功能

switch(++Counter%5)

{

case 0:

case 1:

P0 = 0x02; // 0000 0010

P2 = LedSeg[Sec % 10];

break;

case 2:

P0 = 0x04; // 0000 0100

P2 = LedSeg[Sec / 10];

break;

case 3:

P0 = 0x08; // 0000 1000

P2 = LedSeg[Min % 10];

break;

case 4:

P0 = 0x10; // 0001 0000

P2 = LedSeg[Min / 10];

break;

}

//延时

Delay2ms(1);

//走时

if(StopFlag == 0)

{ if(Counter >= 500)

{

Counter = 0;

if(++Sec > 59)

{

Sec = 0;

if(++Min > 59)

{

Min = 0;

}

}

}

}

//按键工作，让走时停止，StopFlag = 1

if(TIMESTOP_K == 0)

{

Delay2ms(5);

while(TIMESTOP_K == 0);

StopFlag = ~ StopFlag;

}

}

}