用keiluVision5 AT89C5110秒秒表编程

这是一个秒表，有按键实现 启动、暂停核清零功能。

#include <reg51.H>

sbit P3_5 =P3^5

unsigned char code dispcode[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,

0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E,0x00}

unsigned char second

unsigned char keycnt

unsigned int tcnt

void main(void)

{

unsigned char i,j

TMOD=0x02

ET0=1

EA=1

second=0

P1=dispcode[second/10]

P2=dispcode[second%10]

while(1)

{

if(P3_5==0)

{

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

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

if(P3_5==0)

{

keycnt++

switch(keycnt)

{

case 1:

TH0=0x06

TL0=0x06

TR0=1

break

case 2:

TR0=0

break

case 3:

keycnt=0

second=0

P1=dispcode[second/10]

P2=dispcode[second%10]

break

}

while(P3_5==0)

}

}

}

}

void t0(void) interrupt 1 using 0

{

tcnt++

if(tcnt==4000)

{

tcnt=0

second++

if(second==100)

{

second=0

}

P1=dispcode[second/10]

P2=dispcode[second%10]

}

}

你的程序有问题，仿真图不要用三极管驱动，反而不显示。如下画法就行，那4个按键不变，没有画。

程序中的按键处理，方法不当。

先改成如下的程序，先调出能显示，然后你自己再增加按键功能。

#include <reg52.h>

#define uchar unsigned char

#define uint unsigned int

sbit START = P1 ^0

sbit STOP = P1 ^1

sbit RESET = P1 ^2

sbit dp = P0 ^7

sbit w1 = P2 ^6

sbit w2 = P2 ^7

uchar aa,temp,STOPFLAG,STARTFLAG,miaoshi,miaoge

uchar code table[] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}//段码表错误

void display()

void delay( uint z)

void init()

void main()

{

init()

while(1)

{

display()//不用带参数

if(aa == 20)

{

aa = 0

temp ++

if(temp == 60)

{

temp = 0

}

}

}

}

void delay(uint z)

{ uchar x,y

for(x = zx >0x--)

for(y = 110 y >0y --)//y不能小于110

}

void display()//不用带参数

{

miaoshi = temp/10

miaoge = temp%10

w1 = 1

P0 = table[miaoshi]

delay(2)

w1 = 0

w2 = 1

P0 = table[miaoge]

delay(2)

w2 = 0

}

void init()

{ TMOD = 0x01

TH0 = (65536 - 50000)/256

TL0 = (65536 - 50000)%256

EA = 1

ET0 = 1

TR0 = 1

}

void timer0() interrupt 1

{ TH0 = (65536 - 50000)/256

TL0 = (65536 - 50000)%256

aa ++

}

有一个现成的相关程序，你参考参考

#include<reg52.h>

#define uchar unsigned char

#define uint unsigned int

sbit key1=P3^4

sbit key2=P3^5

sbit key3=P3^6

sbit key4=P3^7

uchar code table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0xb0,0x8e}

uchar numt0,num

void delayms(uint xms)

{

 uint i,j

 for(i=xmsi>0i--)

    for(j=110j>0j--)

}

void display(uchar numdis)

{

 uchar shi,ge

 shi=numdis/10

 ge=numdis%10

 P0=table[shi]

 P2=0x0b

 delayms(5)

 P0=table[ge]

 P2=0x07

 delayms(5)

}

void init()

{

 TMOD=0x01

 TH0=(65536-45872)/256

 TL0=(65536-45872)%256

 EA=1

 ET0=1

}

void keyscan()

{

 if(key1==0)

 {

  delayms(10)

if(key1==0)

{

 num++

 if(num==60)

   num=0

    while(!key1)   //等待按键释放

}

 }

 if(key2==0)

 {

    delayms(10)

 if(key2==0)

 {

   if(num==0)

 num=60

   num--

while(!key2)

 }

 }

 if(key3==0)

 {

   delayms(10)

    if(key3==0)

 {

   num=0

while(!key3)

 }

 }

 if(key4==0)

 {

   delayms(10)

if(key4==0)

{

  while(!key4)

  TR0=~TR0

}

 }

}

void main()

{

 init()

 while(1)

 {

    keyscan()

 display(num)

 }

}

void T0_time()interrupt 1

{

 TH0=(65536-45872)/256

 TL0=(65536-45872)%256

 numt0++

 if(numt0==20)

 {

    numt0=0

 num++

 if(num==60)

 num=0

 }

}

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