#include "reg52.h"
#include "i2c.h"
typedef unsigned int u16;
typedef unsigned char u8;
sbit k1 = P3^1;
sbit k2 = P3^0;
sbit k3 = P3^2;
sbit k4 = P3^3;
sbit LSA = P2^2;
sbit LSB = P2^3;
sbit LSC = P2^4;
u8 digiDuan[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
u8 number = 0;
void delay(u16 i)
{
while(i--);
}
void keys()
{
if (k1 == 0){
delay(1000);
if (k1 == 0){
AT24C02_write(0, 2);
}
while(!k1);
}
if (k2 == 0){
delay(1000);
if (k2 == 0){
number = AT24C02_read(0);
}
while(!k2);
}
if (k3 == 0){
delay(1000);
if (k3 == 0){
number++;
if(number > 255){
number = 0;
}
}
while(!k3);
}
if (k4 == 0){
delay(1000);
if (k4 == 0){
number = 0;
}
while(!k4);
}
}
void display_digital( u8 a)
{
u8 i;
for (i = 0; i < 3; i++){
switch (i){
case 0: LSA = 0; LSB = 0; LSC = 0;
P0 = digiDuan[a%10];
delay(100);
P0 = 0X00;
break;
case 1: LSA = 1; LSB = 0; LSC = 0;
P0 = digiDuan[a%100/10];
delay(100);
P0 = 0X00;
break;
case 2: LSA = 0; LSB = 1; LSC = 0;
P0 = digiDuan[a/100];
delay(100);
P0 = 0X00;
break;
}
}
}
void main()
{
while(1){
keys();
display_digital(number);
}
}
