#include

#include

typedef unsigned int u16;

typedef unsigned char u8;

sbit seg_sel = P2^6;

sbit bit_sel = P2^7;

sbit start_key = P3^0;

sbit record_key = P3^1;

sbit reload_key = P3^2;

sbit reset_key = P3^3;

//共阴极数码管0-9和"-"编码0x40

unsigned char code seg_table[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x7,0x7F,0x6F,0x40};

//数码管位码(数组第1位对应数码管最左位)

unsigned char code bit_table[]={0xFE,0xFD,0xFB,0xF7,0xEF,0xDF,0xBF,0x7F};

#define DATA P0

u8 timer;

//初始化显示数据

u8 TimeFormat[] = {0,0,1,0,0,1,0,0};

//数据记录数组，5组，每组8个数据

u8 ResultArray[5][8];

u8 ResultMax = 5;

u8 i,j,k,z;

unsigned long TotalMS;

u8 minS,minG,secS,secG,msS,msG;

bit IsReload;

void delay(u16 num)

{

u16 m,n;

for(m=num; m>0; m--)

for(n=113; n>0; n--);

}

//此函数将毫秒数转换成需要显示的时间格式(设置数组TimeFormat[])

void FormatTimeWithMS(long tms)

{

minS = (tms/60000)/10;

minG = (tms/60000)%10;

secS = (tms-(minS*10+minG)*60000)/1000/10;

secG = (tms-(minS*10+minG)*60000)/1000%10;

msS = (tms%1000)/100;

msG = (tms%1000)%100/10;

TimeFormat[0] = minS;

TimeFormat[1] = minG;

TimeFormat[3] = secS;

TimeFormat[4] = secG;

TimeFormat[6] = msS;

TimeFormat[7] = msG;

}

void TimeDisplay(void)

{

i = 0;

for (j=0; j<8; j++)

{

//移位

bit_sel = 1;

DATA = bit_table[j];

bit_sel = 0;

//显数

seg_sel = 1;

if ( i==2 | i==5 )

{

DATA = seg_table[10];

}else{

DATA = seg_table[TimeFormat[i]];

if (!IsReload)

{

DATA = seg_table[TimeFormat[i]];

}else{

DATA = seg_table[ResultArray[z][i]];

}

}

i++;

delay(1);

//消影

DATA = 0x00;

seg_sel = 0;

}

}

void StopTimer(void)

{

if(TR0){TR0=0;}

IsReload = 1;

TotalMS = 0;

FormatTimeWithMS(TotalMS);

}

void main(void)

{

DATA = 0x00;

P3 = 0xff;

seg_sel = 0;

bit_sel = 0;

TMOD = 0x01;

//单次溢出时间10ms之初值

TH0 = 0xdc;

TL0 = 0x00;

EA = 1;

ET0 = 1;

TotalMS = 0;

while(1)

{

//计时启停

if (start_key == 0)

{

delay(10);

if (start_key == 0)

{

TR0 = ~TR0;

}

while(!start_key);

}

//记录时间

if (record_key == 0)

{

delay(10);

if (record_key == 0)

{

//小于最大记录时，记录数据；达到最大值时，停止计时器

if (k < ResultMax)

{

ResultArray[k][0] = minS;

ResultArray[k][1] = minG;

ResultArray[k][2] = 1;

ResultArray[k][3] = secS;

ResultArray[k][4] = secG;

ResultArray[k][5] = 1;

ResultArray[k][6] = msS;

ResultArray[k][7] = msG;

k++;

if (k==ResultMax) if(TR0){TR0=0;}

}

}

while(!record_key);

}

//回显被记录的时间

if (reload_key == 0)

{

delay(10);

if (reload_key == 0)

{

//如果不是回显数据，那么z=0(此处加判断的意义是首次点击回显键时，数据从第一组开始显示)

if(!IsReload)

{

z = 0;

}else{

z++;

if( z > (ResultMax-1)){z=0;}

}

StopTimer();

}

while(!reload_key);

}

//重置(计时器停止，总显示时间清0，时间记录数组清0，回显数据状态置0)

if (reset_key == 0)

{

delay(10);

if (reset_key == 0)

{

StopTimer();

memset(ResultArray,0,sizeof(ResultArray));

IsReload = 0;

}

while(!reset_key);

}

//显示时间

FormatTimeWithMS(TotalMS);

TimeDisplay();

}

}

void timer0_service(void) interrupt 1

{

TH0 = 0xdc;

TL0 = 0x00;

//因为是每10ms溢出一次，故总时间累加10ms。

TotalMS = TotalMS+10;

}