基于51單片機 10秒的秒表

ID:464253 · 發表于 2019-1-9 22:04

十秒秒表代碼如下：
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int

sbit K1 = P3^7;
uchar i,Second_Counts,Key_Flag_Idx;
bit Key_State;
uchar DSY_CODE[]=
{
0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f
};

void DelayMS(uint ms)
{
uchar t;
while(ms--)
{
     for(t=0;t<120;t++);
}
}

void Key_Event_Handle()
{
if(Key_State == 0)
{
     Key_Flag_Idx=(Key_Flag_Idx+1)%3;
switch(Key_Flag_Idx)
{
     case 1:EA=1;ET0=1;TR0=1;break;
case 2:EA=0;ET0=0;TR0=0;break;
case 0:P0=0x3f;P2=0x3f;i=0;Second_Counts=0;
}
}
}

void main()
{
P0 = 0x3f;
P2 = 0x3f;
i = 0;
Second_Counts = 0;
Key_State = 1;
TMOD = 0x01;
TH0  = (65535-50000)/256;
TL0  = (65535-50000)%256;
while(1)
{
     if(Key_State != K1)
{
     DelayMS(10);
Key_State = K1;
Key_Event_Handle();
}
}
}

void DSY_Refresh() interrupt 1
{
TH0  = (65535-50000)/256;
TL0  = (65535-50000)%256;
if(++i==2)
{
     i = 0;
++Second_Counts;
P0 = DSY_CODE[Second_Counts/10];
P2 = DSY_CODE[Second_Counts%10];
if(Second_Counts == 100) Second_Counts = 0;
}
}

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基于51單片機 10秒的秒表