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#include <reg52.h>
#define uchar unsigned char //无符号字符型 宏定义 变量范围0~255
#define uint unsigned int //无符号整型 宏定义 变量范围0~65535
#include "lcd1602.h"
#include "at24c02.h"
sbit relay = P2^2; //继电器定义
sbit beep = P3^3; //蜂鸣器定义
sbit beiguang = P2^3; //背光
bit flag_200ms=1; //200ms标志位
uchar value,i; //变量
uchar flag_lj_en=1; //连加使能
uchar flag_lj_en_value;
uchar key_can; //键值
uchar menu_1,menu_i;
uchar smg_i; //输密光标
uchar dis_smg[8]={0};
uchar password[8]={8,7,6,5,4,3,2,1}; //密码保存
uchar password_bj[8]={1,2,3,4,5,6,7,8}; //密码比较
uchar code password_r[8] = {1,2,3,4,1,2,3,4} ;
uchar password_xg[8]={7,6,5,4,3,2,1,0}; //密码修改
uchar flag_password; //密码正确否标志
uchar flag_password_cishu;//密码错误次数标志
uint flag_time; //时间标志位
uint flag_bisuo; //闭锁标志位
/***********************1ms延时函数*****************************/
void delay_1ms(uint q)
{
uint i,j;
for(i=0;i<q;i++)
for(j=0;j<120;j++);
}
/*************************清空数组函数**************************/
void clear_shuzu(uchar *p)
{
for(i=0;i<8;i++)
p[i] = 0;
}
/**************************定时器0初始化函数*******************/
void time_init()
{
EA = 1; //开总中断
TMOD = 0X01; //定时器0、工作方式1
ET0 = 1; //开定时器0中断
TR0 = 1; //允许定时器0定时
}
/********************下载程序密码初始化函数********************/
void password_chushihua()
{
beep = 0;
write_24c02_8(8,0,password_r);
delay_1ms(200);
read_24c02_8(8,0,password);
beep = 1;
}
/***********************键盘扫描函数**************************/
void key()
{
static uchar key_new = 0, key_l;
key_can = 20; //按键值还原
P1 = 0x0f;
if((P1 & 0x0f) != 0x0f) //如果有按键按下
{
delay_1ms(1); //延时消抖
if(((P1 & 0x0f) != 0x0f) && (key_new == 1)) //再次确认
{
key_new = 0;
key_l = (P1 | 0xf0); //通过算法得到键值
P1 = key_l;
switch(P1) //得到键值
{
case 0xee: key_can = 1; break;
case 0xde: key_can = 4; break;
case 0xbe: key_can = 7; break;
case 0x7e: key_can = 10; break;
case 0xed: key_can = 0; break;
case 0xdd: key_can = 8; break;
case 0xbd: key_can = 5; break;
case 0x7d: key_can = 2; break;
case 0xeb: key_can = 3; break;
case 0xdb: key_can = 6; break;
case 0xbb: key_can = 9; break;
case 0x7b: key_can = 11; break;
case 0xe7: key_can = 15; break;
case 0xd7: key_can = 14; break;
case 0xb7: key_can = 13; break;
case 0x77: key_can = 12; break;
}
}
}
else
{
key_new = 1; //没有键按下时赋值
flag_lj_en = 0;
}
}
/****************按键功能处理********************/
void key_with()
{
static uchar value;
if(key_can == 14) //如果是“手动闭锁”键
relay = 1;
if(key_can == 10) //如果是“密码还原”键
{
flag_lj_en = 1; //连加使能
flag_lj_en_value = 0;
}
if(menu_1 == 0)
{
if(key_can <= 9)
if(menu_i < 8) //密码输入位数
{
menu_i ++;
if(menu_i > 8) //超过8位无法写入
menu_i = 8;
smg_i = menu_i;
for(i=8;i>0;i--) //依次装入密码比较数组
password_bj[i] = password_bj[i-1];
password_bj[0] = key_can;
for(i=0;i<smg_i;i++) //显示占位符“*”
dis_smg[i] ='*';
write_string(2,7,dis_smg);
lcd1602_gbiao(1,7 + menu_i + 0x40); //开光标
}
if(key_can == 11) //如果是“密码删除”键
{
for(i=0;i<menu_i;i++) //依次从比较数组中取出密码
password_bj[i] = password_bj[i+1];
menu_i --;
password_bj[menu_i] = ' '; //清除占位符
dis_smg[menu_i] = ' ';
write_string(2,7,dis_smg);
lcd1602_gbiao(1,7 + menu_i + 0x40); //开光标
}
if(key_can == 15) //如果是“确认”键
{
value = 0;
for(i=0;i<8;i++) //8位密码分别比较
{
if(password_bj[i] == password[i])
{
flag_password = 1; //密码正确
relay = 0; //锁开
flag_password_cishu=0; //输入正确，错误次数清零
for(i=0;i<8;i++)
dis_smg[i] = 0xbf;
}
else
{
flag_password = 0;
flag_password_cishu ++;
write_string(1,0," Password error ");
write_string(2,0," cishu: ");
write_cwcs(2,9,flag_password_cishu); //在第二行第九位显示次数
delay_1ms(280);
for(i=0;i<6;i++) //蜂鸣三声
{
beep = ~beep;
delay_1ms(200);
}
beep = 1; //关闭蜂鸣
delay_1ms(800);
break;
}
}
clear_shuzu(dis_smg); //显示初始化
write_string(1,0," Password Lock ");
write_string(2,0," Input: ");
lcd1602_gbiao(1,7+0x40); //开光标
menu_i = 0;
}
}
}
/**************************密码还原函数***************************/
void password_return()
{
if(flag_lj_en == 1)
{
flag_lj_en_value ++;
if(flag_lj_en_value > 13)
{
flag_lj_en_value = 0;
flag_lj_en = 0;
write_24c02_8(8,0,password_r); //写入初始化密码
beep = 0;
delay_1ms(500);
beep = 1;
read_24c02_8(8,0,password); //读取密码
}
}
}
/*******************************修改密码**************************/
void xiugai_password()
{
if(key_can == 13) //如果是“修改密码”键
{
if((relay == 0) && (menu_1 == 0))
{
menu_1 = 1; menu_i = 0; //赋值
clear_shuzu(password_bj); //数据清空
clear_shuzu(dis_smg);
write_string(1,0,"Input1: ");
write_string(2,0,"Input2: ");
lcd1602_gbiao(1,7); //开光标
}
}
if(menu_1 == 1) //第一次输入修改的密码
{
if(key_can <= 9) //键号小于或等于9
{
if(menu_i < 8) //输入个数小于8
{
menu_i ++;
if(menu_i > 8)
menu_i = 8;
smg_i = menu_i;
for(i=8;i>0;i--)
password_bj[i] = password_bj[i-1]; //依次装入数组中
password_bj[0] = key_can;
for(i=0;i<menu_i;i++)
dis_smg[i] ='*'; //依次显示占位符“*”
write_string(1,7,dis_smg);
lcd1602_gbiao(1,7 + menu_i); //开光标
}
}
if(key_can == 11) //如果是"删除"键
{
for(i=0;i<menu_i;i++)
password_bj[i] = password_bj[i+1];
menu_i --;
password_bj[menu_i] = ' ';
dis_smg[menu_i] = ' ';
write_string(1,7,dis_smg);
lcd1602_gbiao(1,7 + menu_i); //开光标
}
if(key_can == 15) //如果是“确定”键
{
clear_shuzu(password_xg); //数据清空
clear_shuzu(dis_smg);
lcd1602_gbiao(1,7 + 0x40); //开光标
menu_1 = 2;
menu_i = 0;
key_can = 20; //按键值还原
}
}
if(menu_1 == 2) //第二次输入修改的密码
{
if(key_can <= 9)
{
if(menu_i < 8)
{
menu_i ++;
if(menu_i > 8)
menu_i = 8;
for(i=8;i>0;i--)
password_xg[i] = password_xg[i-1];
password_xg[0] = key_can;
for(i=0;i<menu_i;i++)
dis_smg[i] ='*';
write_string(2,7,dis_smg);
lcd1602_gbiao(1,7 + menu_i + 0x40); //开光标
}
}
if(key_can == 11) //如果是“删除”键
{
for(i=0;i<menu_i;i++)
password_xg[i] = password_xg[i+1]; //依次从数组最后一个清除
password_xg[menu_i] = ' ';
dis_smg[menu_i] = ' '; //依次显示占位符“ ”
write_string(2,7,dis_smg);
lcd1602_gbiao(1,7 + menu_i + 0x40); //开光标
}
if(key_can == 15) //如果是“确定”键
{
for(i=0;i<8;i++) //分别比较两次输入的8位密码
{
if(password_bj[i] == password_xg[i]) //只要有一位不匹配就会执行else
{
flag_password = 1; //两次输入的密码一样
}
else
{
flag_password = 0;
write_string(1,0," Password Error ");
write_string(2,0," reenter ");
delay_1ms(300);
for(i=0;i<6;i++)
{
beep = ~beep; //提示三声
delay_1ms(300);
}
beep = 1;
delay_1ms(1000);
break;
}
}
if(flag_password == 1) //如果两次输入一致
{
for(i=0;i<8;i++)
{
write_string(1,0," Password ");
write_string(2,0," Succeed ");
password[i] = password_bj[i]; //保存密码
}
write_24c02_8(8,0,password); //将密码写入AT24C02
delay_1ms(300);
beep = 0; //蜂鸣器提示一声
delay_1ms(2000);
beep = 1;
}
clear_shuzu(password_xg); //数据清空
clear_shuzu(dis_smg);
write_string(1,0," Password Lock ");
write_string(2,0," Input: ");
lcd1602_gbiao(1,7+0x40); //开光标
menu_1 = 0;
menu_i = 0;
}
}
}
/********************************主程序******************************/
void main()
{
static uint value ;
password_chushihua(); //密码初始化
time_init(); //定时器初始化
read_24c02_8(8,0,password); //从AT24C02读取密码
init_1602(); //LCD1602初始化
beiguang = 0; //背光开
while(1)
{
if(flag_password_cishu < 3) //判断密码错误次数是否小于3
{
key(); //按键扫描函数
if(key_can < 20)
{
if(beiguang == 0)
{
if(menu_1 == 0)
key_with(); //按键处理函数
xiugai_password(); //修改密码函数
}
else
beiguang = 0;
flag_time = 0;
}
}
if(flag_200ms == 1)
{
flag_200ms = 0;
if(beiguang == 0) //延时30秒关闭背光
{
flag_time ++;
if(flag_time >= 5 * 30) //延时30秒（50×4×5×30）
{
flag_time = 0;
beiguang = 1; //关闭背光
}
}
if(relay == 0) //延时10秒关闭锁
{
flag_bisuo++;
if(flag_bisuo >= 5 * 10) //延时10秒
{
flag_bisuo = 0;
relay = 1; //关闭锁
}
}
else
flag_bisuo = 0;
if(flag_password_cishu >= 3)
{
value ++; //每自加一次延时200ms
beep = ~beep; //蜂鸣器报警
if(value >= 5 * 60) //报警时间为1分钟
{
value = 0;
beep = 1;
flag_password_cishu = 0;
}
}
password_return(); //密码还原函数
}
delay_1ms(1);
}
}
/***********************定时器0中断服务程序***********************/
void time0_int() interrupt 1
{
static uchar value;
TH0 = 0x3c; // 50ms(12M晶振下的定时初值）
TL0 = 0xb0;
value ++;
if(value % 4 == 0)
{
flag_200ms = 1;
}
}
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