LCD1602乱码,单片机密码锁程序 -

#include <reg52.h> //调用单片机头文件
#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
uchar value,i; //变量
sbit relay = P2^2; //继电器定义
sbit beep = P3^3; //蜂鸣器定义
sbit beiguan = P2^3; //背光
uint flag_time;
uint flag_guan;
uchar smg_i;
uchar dis_smg[7]={0};
uchar password[7]={6,5,4,3,2,1}; //密码保存
uchar password_bj[7]={1,2,3,4,5,6}; //密码比较
uchar code password_r[6] = {1,2,3,1,2,3} ;
uchar code password_gl[6] = {5,2,0,0,2,5} ;
uchar password_xg[6]; //密码修改
uchar flag_password; //密码正确否
uchar flag_password_cichu1;//密码错误次数
bit flag_200ms=1; //200ms标志位
uchar key_can;
uchar menu_1,menu_i;
sbit scl = P2^1; //24C02 IO口定义
sbit sda = P2^0; //24C02 IO口定义
uchar code table_num[]="0123456789abcdefg";
sbit rs=P2^5; //寄存器选择信号 H:数据寄存器 L:指令寄存器
sbit rw=P2^6; //寄存器选择信号 H:数据寄存器 L:指令寄存器
sbit e =P2^7; //片选信号下降沿触发
/***********************延时函数************************/
void delay_uint(uint q)
{
while(q--);
}
/***********************lcd1602写命令函数************************/
void write_com(uchar com)
{
e=0;
rs=0;
rw=0;
P0=com;
delay_uint(3);
e=1;
delay_uint(25);
e=0;
}
/***********************lcd1602写数据函数************************/
void write_data(uchar dat)
{
e=0;
rs=1;
rw=0;
P0=dat;
delay_uint(3);
e=1;
delay_uint(25);
e=0;
}
/*********************光标控制***********************/
void lcd1602_guanbiao(uchar open_off,uchar add)
{
if(open_off == 1) //开光标
{
write_com(0x80+add); //将光标移动到秒个位
write_com(0x0f); //显示光标并且闪烁
}
else
{
write_com(0x0c); //关光标
}
}
/***********************lcd1602上显示两位十进制数************************/
void write_sfm2(uchar hang,uchar add,uchar date)
{
uchar shi,ge;
if(hang==1)
write_com(0x80+add);
else
write_com(0x80+0x40+add);
shi=date%100/10;
ge=date%10;
write_data(0x30+shi);
write_data(0x30+ge);
}
/***********************lcd1602上显示这字符函数************************/
void write_string(uchar hang,uchar add,uchar *p)
{
if(hang==1)
write_com(0x80+add);
else
write_com(0x80+0x40+add);
while(1)
{
if(*p == '\0') break;
write_data(*p);
p++;
delay_uint(50);
}
}
/***********************lcd1602初始化设置************************/
void init_1602()
{
write_com(0x38); //
write_com(0x0c);
write_com(0x06);
delay_uint(1000);
write_string(1,0," Password Lock ");
write_string(2,0," Input: ");
lcd1602_guanbiao(1,7+0x40); //开光标
}
/***************启始信号 ***************************/
void start()
{
sda = 1;
scl = 1;
sda = 0;
scl = 0;
}
/****************结束信号 **************************/
void stop()
{
sda = 0;
scl = 1;
sda = 1;
scl = 0;
}
/*****************检测应答*************************/
void ack()
{
uchar i;
sda = 1;
scl = 1;
while((i < 100) & (sda == 1)) i++;
scl =0;
}
void ack_zhuji()
{
sda = 0;
scl = 1;
scl = 0;
sda = 1;
}
/*****************非应答*************************/
void no_ack()
{
sda = 1;
scl = 1;
scl = 0;
}
/*****************写一个字节*************************/
void write_iic(uchar dat)
{
uchar i;
for(i=0;i<8;i++)
{
scl = 0;
dat <<= 1 ;
sda = CY;
scl = 1;
}
scl = 0;
}
/*******************读一个字节***********************/
uchar read_iic()
{
uchar i,value;
for(i=0;i<8;i++)
{
scl = 1;
value <<= 1;
if(sda == 1)
value |= 0x01;
scl = 0;
}
return value;
}
/*****************向24C02写一个字节进去*************************/
void write_24c02(uchar add,uchar dat)
{
start();
write_iic(0xa0);
ack();
write_iic(add);
ack();
write_iic(dat);
no_ack();
stop();
}
/******************从24C02读一个字节进去************************/
uchar read_24c02(uchar add)
{
uchar value;
start();
write_iic(0xa0);
ack();
write_iic(add);
ack();
start();
write_iic(0xa1);
ack();
value = read_iic();
no_ack();
stop();
return value;
}
/*****************向24C02写多个字节进去*************************/
void write_24c02_8(uchar n,uchar add,uchar *p)
{
uchar i;
EA = 0;
start();
write_iic(0xa0);
ack();
write_iic(add);
for(i=0;i<n;i++)
{
ack();
write_iic(*p);
p++;
}
no_ack();
stop();
EA = 1;
}
/******************从24C02读多个字节进去************************/
void read_24c02_8(uchar n,uchar add,uchar *p)
{
uchar i;
EA = 0;
start();
write_iic(0xa0);
ack();
write_iic(add);
ack();
start();
write_iic(0xa1);
ack();
for(i=0;i<n;i++)
{
p[i] = read_iic();
if(i == n-1)
{
ack();
stop();
}
else
ack_zhuji();
}
EA = 1;
}
/***********************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++);
}
void key() //独立按键程序
{
static uchar key_new = 0, key_l;
key_can = 20; //按键值还原
P1 = 0x0f;
if((P1 & 0x0f) != 0x0f) //按键按下
{
delay_1ms(1); //按键消抖动
if(((P1 & 0x0f) != 0x0f) && (key_new == 1))
{ //确认是按键按下
key_new = 0;
key_l = (P1 | 0xf0); //矩阵键盘扫描
P1 = key_l;
switch(P1)
{
case 0xee: key_can = 1; break; //得到按键值
case 0xde: key_can = 4; break; //得到按键值
case 0xbe: key_can = 7; break; //得到按键值
case 0x7e: key_can = 10; break; //得到按键值
case 0xed: key_can = 0; break; //得到按键值
case 0xdd: key_can = 8; break; //得到按键值
case 0xbd: key_can = 5; break; //得到按键值
case 0x7d: key_can = 2; break; //得到按键值
case 0xeb: key_can = 3; break; //得到按键值
case 0xdb: key_can = 6; break; //得到按键值
case 0xbb: key_can = 9; break; //得到按键值
case 0x7b: key_can = 11; break; //得到按键值
case 0xe7: key_can = 15; break; //得到按键值
case 0xd7: key_can = 14; break; //得到按键值
case 0xb7: key_can = 13; break; //得到按键值
case 0x77: key_can = 12; break; //得到按键值
}
}
}
else
{
key_new = 1;
}
}
/***************把数组清空**********************/
void clear_shuzu(uchar *p)
{
for(i=0;i<7;i++)
p[i] = 0;
}
/*************定时器0初始化程序***************/
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**********************/
void password_chushifa()
{
scl = 0;
value = read_24c02(10) ;
if(value != 75)
{
value = 75;
beep = 0;
write_24c02(10,value);
delay_1ms(200);
write_24c02_8(6,0,password_r);
delay_1ms(200);
read_24c02_8(6,0,password);
beep = 1;
}
}
/****************按键功能处理********************/
void key_with()
{
static uchar value;
if(key_can == 14) //手动关闭密码锁
relay = 1;
if(menu_1 == 0)
{
if(key_can <= 9)
if(menu_i < 6) //密码输入
{
menu_i ++;
if(menu_i > 6)
menu_i = 6;
smg_i = menu_i;
for(i=6;i>0;i--)
password_bj[i] = password_bj[i-1];
password_bj[0] = key_can;
for(i=0;i<smg_i;i++)
dis_smg[i] ='*';//0x30 + password_bj[i];
write_string(2,7,dis_smg);
lcd1602_guanbiao(1,7 + menu_i + 0x40); //开光标
}
if(key_can == 11) //密码删除
{
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(2,7,dis_smg);
lcd1602_guanbiao(1,7 + menu_i + 0x40); //开光标
}
if(key_can == 15) //确认键
{
value = 0;
for(i=0;i<6;i++)
{
if(password_bj[i] == password_gl[i]) //判断管理员密码
{
value ++;
if(value >= 6) //密码正确
{
write_string(2,0," return ");
beep = 0;
delay_1ms(200);
read_24c02_8(6,0,password);
beep = 1;
delay_1ms(2000);
}
}
}
if(value < 6)
for(i=0;i<6;i++)
{
if(password_bj[i] == password[i])
{
flag_password = 1; //密码正确
relay = 0; //打开密码锁
for(i=0;i<6;i++)
dis_smg[i] = 0xbf;
}
else
{
flag_password = 0;
flag_password_cichu1 ++;
write_string(1,0," Password error ");
write_string(2,0," cishu: ");
write_sfm2(2,9,flag_password_cichu1);
delay_1ms(280);
for(i=0;i<6;i++)
{
beep = ~beep;
delay_1ms(200);
}
beep = 1;
delay_1ms(800);
break; //密码不正确
}
}
clear_shuzu(dis_smg);
write_string(1,0," Password Lock ");
write_string(2,0," Input: ");
lcd1602_guanbiao(1,7+0x40); //开光标
menu_i = 0;
}
}
}
/****************修改密码********************/
void xiugai_password()
{
if(key_can == 13) //修改密码
{
if((relay == 0) && (menu_1 == 0))
{
menu_1 = 1; menu_i = 0;
clear_shuzu(password_bj); //数据清空
clear_shuzu(dis_smg);
write_string(1,0,"Input1: ");
write_string(2,0,"Input2: ");
lcd1602_guanbiao(1,7); //开光标
}
}
if(menu_1 == 1) //第一次输入修改的密码
{
if(key_can <= 9)
{
if(menu_i < 6)
{
menu_i ++;
if(menu_i > 6)
menu_i = 6;
smg_i = menu_i;
for(i=7;i>0;i--)
password_bj[i] = password_bj[i-1];
password_bj[0] = key_can;
for(i=0;i<menu_i;i++)
dis_smg[i] ='*';
write_string(1,7,dis_smg);
lcd1602_guanbiao(1,7 + menu_i); //开光标
}
}
if(key_can == 11) //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_guanbiao(1,7 + menu_i); //开光标
}
if(key_can == 15) //确定键
{
clear_shuzu(password_xg);
clear_shuzu(dis_smg);
lcd1602_guanbiao(1,8 + 0x40); //开光标
menu_1 = 2;
menu_i = 0;
key_can = 20;
}
}
if(menu_1 == 2) //第二次输入修改的密码
{
if(key_can <= 9)
{
if(menu_i < 6)
{
menu_i ++;
if(menu_i > 6)
menu_i = 6;
for(i=5;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] ='*';//0x30 + password_xg[i];
write_string(2,7,dis_smg);
lcd1602_guanbiao(1,7 + menu_i + 0x40); //开光标
}
}
if(key_can == 11) //删除键
{
for(i=0;i<menu_i;i++)
password_xg[i] = password_xg[i+1];
password_xg[menu_i] = ' ';
dis_smg[menu_i] = ' ';
write_string(2,7,dis_smg);
lcd1602_guanbiao(1,7 + menu_i + 0x40); //开光标
}
if(key_can == 15) //确定键
{
for(i=0;i<6;i++)
{
if(password_bj[i] == password_xg[i])
{
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; //密码不正确
}
}
if(flag_password == 1) //两次输入的密码一样的
{
for(i=0;i<6;i++)
{
write_string(1,0," Password ");
write_string(2,0," Succeed ");
password[i] = password_bj[i]; //保存密码
}
write_24c02_8(6,0,password);
delay_1ms(300);
beep = 0;
delay_1ms(2000);
beep = 1;
}
clear_shuzu(password_xg);
clear_shuzu(dis_smg);
write_string(1,0," Password Lock ");
write_string(2,0," Input: ");
lcd1602_guanbiao(1,7+0x40); //开光标
menu_1 = 0;
menu_i = 0;
}
}
}
/******************主程序**********************/
void main()
{
static uint value ;
password_chushifa();
time_init(); //定时器初始化
read_24c02_8(6,0,password);
init_1602();
beiguan = 0;
while(1)
{
if(flag_password_cichu1 < 3) //错误三次按键不能用了
{
key(); //按键函数
if(key_can < 20)
{
if(beiguan == 0)
{
if(menu_1 == 0)
key_with(); //按键处理函数
xiugai_password(); //修改密码
}
else
beiguan = 0;
flag_time = 0;
}
}
if(flag_200ms == 1)
{
flag_200ms = 0;
if(beiguan == 0) //延时关闭锁20秒关闭背光
{
flag_time ++;
if(flag_time >= 5 * 30) //30秒
{
flag_time = 0;
beiguan = 1; //关闭背光
}
}
if(relay == 0) //延时关闭锁
{
flag_guan++;
if(flag_guan >= 5 * 10) //10秒
{
flag_guan = 0;
relay = 1; //关闭密码锁
}
}else
flag_guan = 0;
if(flag_password_cichu1 >= 3)
{
value ++; //200ms
beep = ~beep; //蜂鸣器报警
if(value >= 5 * 60) //1分钟
{
value = 0;
beep = 1;
flag_password_cichu1 = 0;
}
}
}
delay_1ms(1);
}
}
/*************定时器0中断服务程序***************/
void time0_int() interrupt 1
{
static uchar value;
TH0 = 0x3c;
TL0 = 0xb0; // 50ms 12M
value ++;
if(value % 4 == 0)
{
flag_200ms = 1;
}
}

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