/**************************************
> File Name: 定时器中断
> Author: pengshp
> Mail: pengshp3@outlook.com
> Date: 2015年 8 月 1 日
***************************************/
#include <reg51.h>
#define uchar unsigned char
#define uint unsigned int
unsigned char code LedChar[]={
0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8,
0x80, 0x90, 0x88, 0x83, 0xC6, 0xA1, 0x86, 0x8E
}; //共阳极数码管真值表
uchar LedBuff[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
uchar i=0;
uchar flagls=0;
uint cnt=0;
void main()
{
unsigned long sec=0;
EA=1;
TMOD=0x01;
TH0=0xFC;
TL0=0x18; //1ms后溢出
ET0=1; //定时器0使能中断
TR0=1; //打开定时器0
while(1)
{
if(flagls==1)
{
flagls=0;
sec++;
LedBuff[0] = ~LedChar[sec%10];
LedBuff[1] = ~LedChar[sec/10%10];
LedBuff[2] = ~LedChar[sec/100%10];
LedBuff[3] = ~LedChar[sec/1000%10];
LedBuff[4] = ~LedChar[sec/10000%10];
LedBuff[5] = ~LedChar[sec/100000%10];
LedBuff[6] = ~LedChar[sec/1000000%10];
LedBuff[7] = ~LedChar[sec/10000000%10];
}
}
}
/*定时器0中断使能函数*/
void InterruptTimer0() interrupt 1
{
TH0=0xFC;
TL0=0x18;
cnt++;
if(cnt>=1000) //中断1000次,即1s
{
cnt=0;
flagls=1;
}
P1=0x00; //数码管消隐
for(;i<8;i++)
{
P0=~LedChar[i];
P1=LedBuff[i];
}
}
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