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#include <reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit RESET = P3^7;
int Price = 70, Mileage = 0;
uchar count = 0;
uchar code tab_d[10] = {0x3F, 0X06, 0X5B, 0X4F, 0X66, 0X6D, 0X7D, 0X07, 0X7F, 0X6F};
uchar code tab_wei[8] ={0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0xfe};
//????ms
void delay(uint t)
{
uchar i = 0;
while(t--)
for (i; i<120; i++);
}
//???????
/*
????:
d : ???????
x : ????????(0x80 ?? 0??
w :?????
*/
void disp(uchar d, uchar x, uchar w)
{
P2 = 0XFF;
P2 = tab_wei[w];
P0 = 0;
P0 = tab_d[d] | x;
delay (100);
}
//????
void refresh()
{
disp(Mileage%10, 0, 0);//??
disp(Mileage/10%10, 0x80, 1);
if (Mileage >= 100)
disp(Mileage/100%10, 0, 2);
if (Mileage >= 1000)
disp(Mileage/1000%10, 0, 3);
disp(Price%10, 0, 4);
disp(Price/10%10, 0x80, 5);
if (Price >= 100)
disp(Price/100%10, 0, 6);
if (Price >= 1000)
disp(Price/1000%10, 0, 7);
}
void timer1 () interrupt 1
{
count++;
Mileage += 1;
if( count == 5)
{
count = 0;
if (Mileage > 30)
Price +=10;
}
}
//?????
void init()
{
P0 = 0;
P2 = 0XFF;
TMOD = 0X0E; //???????
IT0 = 1; //????
TH0 = 255; //1?????
TL0 = 255;
TR0 = 1;
IE = 0X82;
}
void judgeReset()
{
if(RESET == 0)
{
Price = 70;
Mileage = 0;
}
}
void main()
{
init (); //?????
while (1)
{
judgeReset ();
refresh ();
}
} |
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