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/**********
功能：秒表
MCU : STC89C52 11.0592MHz
編譯器: Keil C51 V4.22
描述: 精確度1ms,曹老師要求為接通開關(guān)K1開始計(jì)時(shí)；接通開關(guān)K2暫停計(jì)時(shí)并顯示。
作者：NCUT_glx
*********/
#include"reg52.h"
typedef unsigned char UINT8;
typedef unsigned int UINT16;
UINT16 Num;
#define DataPort P0
sbit LE1 = P2^2; //duan
sbit LE2 = P2^3; //wei
sbit K1 = P2^4;
sbit K2 = P2^5;
UINT8 code DuanMa[ ] = { 0x3F,0x06,0x5B,0x4F,
0x66,0x6D,0x7D,0x07,
0x7F,0x6F };
UINT8 code WeiMa[] = { 0xFE,0xFD,0xFB,0xF7,
0xEF,0xDF,0xBF,0x7F };
UINT8 StorageData[8];
void DelayMs( UINT16 Ms )
{
UINT8 i;
while (Ms--)
{
for ( i = 0; i < 114; i++ );
}
}
void chushihua(void)
{
TMOD |= 0x01;
TH0 = (65536-917)/256;
TL0 = (65536-917)%256;
ET0 = 1;
EA = 1;
TR0=1;
}
void TIMER1(void) interrupt 1
{
TH0 =(65536-917)/256;
TL0 =(65536-917)%256;
Num++;
if (Num==10000)
{
Num==0;
}
StorageData[ 0 ] = DuanMa[ Num / 1000 ];
StorageData[ 1 ] = DuanMa[ ( Num % 1000 ) / 100 ];
StorageData[ 2 ] = DuanMa[ ( ( Num % 1000 ) % 100 ) / 10 ];
StorageData[ 3 ] = DuanMa[ ( ( Num % 1000 ) % 100 ) % 10 ];
}
void Display( UINT8 FirstBit, UINT8 Num )//UINT8 FirstBit:要顯示的位；UINT8 Num：要顯示的數(shù)碼管的位數(shù)
{
UINT8 i;
for( i = 0; i < Num; i++ )
{
DataPort=0;
LE1 = 1;
LE1 = 0;
DataPort = WeiMa[ i + FirstBit ];
LE2 = 1;
LE2 = 0;
DataPort = StorageData[ i ];
LE1 = 1;
LE1 = 0;
DelayMs(1);
}
}
void main (void)
{
chushihua();
if(K1==0)
{
while(1)
{
if (K2==0)
{
TR0=0;
}
Display( 2, 4 );
}
}
}

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