为什么不给我财富值 单片机 定时器中断程序.doc

/*数码管显示分钟秒钟；LED循环右移*/

/*用定时器设计一个秒表00-59；开始显示00按下key1加1，key2减1，key3清零key4启动暂停按钮*/
#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit key1=P3^0;
sbit key2=P3^1;
sbit key3=P1^5;
sbit key4=P1^6;

sbit we0=P3^4;
sbit we1=P3^5;
sbit we2=P3^6;
sbit we3=P3^7;

sbit led0=P2^0;
sbit led1=P2^1;
sbit led2=P2^2;
sbit led3=P2^3;
sbit led4=P2^4;
sbit led5=P2^5;
sbit led6=P2^6;
sbit led7=P2^7;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x07f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};//0123456789ABCDEF
uchar m,n,temp;
char num ;
void delayms(uint x)
{
uint i,j;
for(i=x;i>0;i--)
for(j=240;j>0;j--);
}

void init()
{
temp=0x7f;
num=0;
TMOD=0x01; //定时器0工作方式1
TH0=(65536-50000)/256; //装入初值 50ms
TL0=(65536-50000)%256;
TH1=(65536-50000)/256; //装入初值 50ms
TL1=(65536-50000)%256;
EA=1; //开总中断
ET0=1; //开定时器0中断
ET1=1;
// TR0=1; //启动定时器0 中断
TR1=1;
}
void display()
{
uchar shi,ge;
shi=num/10;
ge=num%10;
we3=0;
P0=0xff;
P0=~table[shi];
delayms(1);
we3=1;
we2=0;
P0=0xff;
P0=~table[ge];
delayms(1);
we2=1;
}
keyscan()
{
if(key1==0)
{
delayms(5);
if(key1==0)
{
led3=0;
num++;
if(num==60)
num=0;
while(!key1);
}
led3=1;
}
if(key2==0)
{
delayms(5);
if(key2==0)
{
led2=0;
num--;
if(num==-1)
num=59;
}
while(!key2);
led2=1;
}
if(key3==0)
{
delayms(5);
if(key3==0)
{
led1=0;
num=0;
}
while(!key3);
led1=1;
}
if(key4==0)
{
delayms(5);
if(key4==0)
{
led0=0;
TR0=~TR0;
}

}
while(!key4);
led0=1;
}
void main()
{
init();

while(1)
{
keyscan();
display();
led4=0;
}

}

void timer0() interrupt 1
{
TH0=(65536-50000)/256; //装入初值 50ms
TL0=(65536-50000)%256;
n++;
if(n==20)
{
n=0;
num++;
if(num==60)
{
num=0;
}
}
}
void timer1() interrupt 3
{
TH1=(65536-50000)/256; //装入初值 50ms
TL1=(65536-50000)%256;
m++;
if(m==160) //为什么要达到定时器0的8倍才同步，是因为定时器1只有13位吗
{
m=0;
temp=_cror_(temp,1);
P2=temp;
}
}