出租车计价器 代码

#include<reg52.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
#define delayNOP(); {_nop_();_nop_();_nop_();_nop_();_nop_();};
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
sbit exter=P3^3; //外部中断
sbit key0=P1^0; //清零
sbit key1=P1^1; //切换/+
sbit key2=P1^2; //-
sbit key3=P1^3; //功能键
sbit SCL=P2^2;

uint inter,aa,bb,temp,temp1,numwei;
uint zongjine,licheng,dengdai;
uint zongjine1,licheng1;
uint key3num,qiehuantemp,delaytemp;
uchar danjia1,danjia2,danjia3,danjia,qibu;
void delay(uint x) //延时时基为1ms

{
int i,j;
for(i=x;i>0;i--)
for(j=340;j>0;j--);
}

void display() //数码管显示
{
//数码管动态显示
switch(numwei)
{
case 0:P3=0xfe;P0=table[zongjine/100];break;
case 1:P3=0xfd;P0=table[zongjine%100/10]+0x80;break;
case 2:P3=0xfb;P0=table[zongjine%100%10];break;
case 3:P3=0xef;P0=table[licheng/10];break;
case 4:P3=0xdf;P0=table[licheng%10];break;
case 5:P3=0xbf;P0=table[danjia/10]+0x80;break;
case 6:P3=0x7f;P0=table[danjia%10];break;
}
numwei++;
if(numwei==7)
numwei=0;
}
void keyscan() //键盘扫描
{
if(key3==0) //功能键调节
{
delay(5);
if(key3==0)
{
key3num++;
if(key3num==5) key3num=0;
while(!key3);
delay(5);
while(!key3);
while(key3num)
{
if(key3num==1) //调白天单价
{
if(key1==0)
{
delay(5);
if(key1==0)
{
danjia1++;
if(danjia1==100)
danjia1=0;
while(!key1);
delay(5);

while(!key1);
}
}
if(key2==0)
{
delay(5);
if(key2==0)
{
danjia1--;
if(danjia1==-1)
danjia1=99;
while(!key2);
delay(5);
while(!key2);
}
}
zongjine=100;
licheng=0;
danjia=danjia1;

}
if(key3num==2) //调夜晚单价
{
if(key1==0)
{
delay(5);
if(key1==0)
{
danjia2++;
if(danjia2==100)
danjia2=0;
while(!key1);
delay(5);
while(!key1);
}
}
if(key2==0)
{
delay(5);
if(key2==0)
{
danjia2--;
if(danjia2==-1)
danjia2=99;
while(!key2);
delay(5);
while(!k
ey2);
}
}
zongjine=200;
licheng=0;
danjia=danjia2;

}
if(key3num==3) //调等待单价
{
if(key1==0)
{
delay(5);
if(key1==0)
{
danjia3++;
if(danjia3==100)
danjia3=0;
while(!key1);
delay(5);
while(!key1);
}
}
if(key2==0)
{
delay(5);
if(key2==0)
{
danjia3--;
if(danjia3==-1)
danjia3=99;
while(!key2);
delay(5);
while(!key2);
}
}
zongjine=300;
licheng=0;
danjia=danjia3;

}
if(key3num==4) //调起步价
{
if(key1==0)
{
delay(5);
if(key1==0)
{
qibu++;
if(qibu==

100)
qibu=0;
while(!key1);
delay(5);
while(!key1);
}
}
if(key2==0)
{
delay(5);
if(key2==0)
{
qibu--;
if(qibu==-1)
qibu=99;
while(!key2);
delay(5);
while(!key2);
}
}
zongjine=400;
licheng=0;
danjia=qibu;

}
if(key3num==5) //退出功能键
{

key3num=0;
}
if(key3==0)
{
delay(5);
if(key3==0)
{
key3num++;
while(!key3);
delay(5);
while(!key3);
}
}
}
}
}
}
void init()
{


zongjine=0;
licheng=0;
danjia=0;
bb=0; //判断是否等待的时基个数
inter=0;
EA=1; //开总中断
EX1=1; //开外部中断1
IT1=1; //触发方式下降沿
TMOD=0x01;
TH0=(65536-3000)/256;
TL0=(65536-3000)%256;
ET0=1; //开定时
器T0中断
TR0=1; //开定时器T0
P3=0x08;
P0=table[0];
}
void jisuan()
{
if(licheng>3)
zongjine1=qibu+(licheng-3)*danjia+dengdai*danjia3; //金额计算
else
zongjine1=qibu+dengdai*danjia3; //起步公里内金额计算
}
void qiehuan()
{
if(key1==0) //白天夜晚切换
{
delay(5); //键盘防抖
if(key1==0)
qiehuantemp=!qiehuantemp;
while(!key1);
delay(5);
while(!key1);
}
if(qiehuantemp==0)
danjia=danjia2;
if(qiehuantemp==1)
danjia=danjia1;
}
void main()
{
init();
qiehuantemp=1;
key3num=0;
while(1)
{
if(key3num==0){zongjine=zongjine1,danjia=danjia,EX1=1;}
else EX1=0;
qiehuan(); //切换白天夜晚单价
jisuan(); //计算总金额
keyscan();
if(key0==0) //清零键
init();
}
}
void inter1() interrupt 2 //脉冲中断
{
inter++;
if(inter==50)
{
inter=0;
licheng++;
if(licheng==100) licheng=0;
}
}
void timer0() interrupt 1
{
TH0=(65536-3000)/256;
TL0=(65536-3000)%256;
display();
bb++;
temp1=licheng; //测试是否进入等待
if(bb==10000) //10s无反应进入等待计费
{
bb=0;
if(temp&&temp1)
dengdai++;
temp=licheng;
}
}