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#include <reg52.h> //調用單片機頭文件
#define uchar unsigned char //無符號字符型宏定義變量范圍0~255
#define uint unsigned int //無符號整型宏定義變量范圍0~65535
uchar value,i; //變量
sbit relay = P2^2; //繼電器定義
sbit beep = P3^3; //蜂鳴器定義
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}; //密碼保存
uchar password_bj[7]={1,2,3,4,5,6}; //密碼比較
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]; //密碼修改
uchar flag_password; //密碼正確否
uchar flag_password_cichu1;//密碼錯誤次數
bit flag_200ms=1; //200ms標志位
uchar key_can;
uchar menu_1,menu_i;
sbit scl = P2^1; //24C02 IO口定義
sbit sda = P2^0; //24C02 IO口定義
uchar code table_num[]="0123456789abcdefg";
sbit rs=P2^5; //寄存器選擇信號 H:數據寄存器 L:指令寄存器
sbit rw=P2^6; //寄存器選擇信號 H:數據寄存器 L:指令寄存器
sbit e =P2^7; //片選信號下降沿觸發
/***********************延時函數************************/
void delay_uint(uint q)
{
while(q--);
}
/***********************lcd1602寫命令函數************************/
void write_com(uchar com)
{
e=0;
rs=0;
rw=0;
P0=com;
delay_uint(3);
e=1;
delay_uint(25);
e=0;
}
/***********************lcd1602寫數據函數************************/
void write_data(uchar dat)
{
e=0;
rs=1;
rw=0;
P0=dat;
delay_uint(3);
e=1;
delay_uint(25);
e=0;
}
/*********************光標控制***********************/
void lcd1602_guanbiao(uchar open_off,uchar add)
{
if(open_off == 1) //開光標
{
write_com(0x80+add); //將光標移動到秒個位
write_com(0x0f); //顯示光標并且閃爍
}
else
{
write_com(0x0c); //關光標
}
}
/***********************lcd1602上顯示兩位十進制數************************/
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上顯示這字符函數************************/
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初始化設置************************/
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); //開光標
}
/***************啟始信號 ***************************/
void start()
{
sda = 1;
scl = 1;
sda = 0;
scl = 0;
}
/****************結束信號 **************************/
void stop()
{
sda = 0;
scl = 1;
sda = 1;
scl = 0;
}
/*****************檢測應答*************************/
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;
}
/*****************非應答*************************/
void no_ack()
{
sda = 1;
scl = 1;
scl = 0;
}
/*****************寫一個字節*************************/
void write_iic(uchar dat)
{
uchar i;
for(i=0;i<8;i++)
{
scl = 0;
dat <<= 1 ;
sda = CY;
scl = 1;
}
scl = 0;
}
/*******************讀一個字節***********************/
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寫一個字節進去*************************/
void write_24c02(uchar add,uchar dat)
{
start();
write_iic(0xa0);
ack();
write_iic(add);
ack();
write_iic(dat);
no_ack();
stop();
}
/******************從24C02讀一個字節進去************************/
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寫多個字節進去*************************/
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;
}
/******************從24C02讀多個字節進去************************/
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延時函數*****************************/
void delay_1ms(uint q)
{
uint i,j;
for(i=0;i<q;i++)
for(j=0;j<120;j++);
}
void key() //獨立按鍵程序
{
static uchar key_new = 0, key_l;
key_can = 20; //按鍵值還原
P1 = 0x0f;
if((P1 & 0x0f) != 0x0f) //按鍵按下
{
delay_1ms(1); //按鍵消抖動
if(((P1 & 0x0f) != 0x0f) && (key_new == 1))
{ //確認是按鍵按下
key_new = 0;
key_l = (P1 | 0xf0); //矩陣鍵盤掃描
P1 = key_l;
switch(P1)
{
case 0xee: key_can = 1; break; //得到按鍵值
case 0xde: key_can = 4; break; //得到按鍵值
case 0xbe: key_can = 7; break; //得到按鍵值
case 0x7e: key_can = 10; break; //得到按鍵值
case 0xed: key_can = 0; break; //得到按鍵值
case 0xdd: key_can = 8; break; //得到按鍵值
case 0xbd: key_can = 5; break; //得到按鍵值
case 0x7d: key_can = 2; break; //得到按鍵值
case 0xeb: key_can = 3; break; //得到按鍵值
case 0xdb: key_can = 6; break; //得到按鍵值
case 0xbb: key_can = 9; break; //得到按鍵值
case 0x7b: key_can = 11; break; //得到按鍵值
case 0xe7: key_can = 15; break; //得到按鍵值
case 0xd7: key_can = 14; break; //得到按鍵值
case 0xb7: key_can = 13; break; //得到按鍵值
case 0x77: key_can = 12; break; //得到按鍵值
}
}
}
else
{
key_new = 1;
}
}
/***************把數組清空**********************/
void clear_shuzu(uchar *p)
{
for(i=0;i<7;i++)
p[i] = 0;
}
/*************定時器0初始化程序***************/
void time_init()
{
EA = 1; //開總中斷
TMOD = 0X01; //定時器0、工作方式1
ET0 = 1; //開定時器0中斷
TR0 = 1; //允許定時器0定時
}
/******************下載程序密碼初始化**********************/
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;
}
}
/****************按鍵功能處理********************/
void key_with()
{
static uchar value;
if(key_can == 14) //手動關閉密碼鎖
relay = 1;
if(menu_1 == 0)
{
if(key_can <= 9)
if(menu_i < 6) //密碼輸入
{
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); //開光標
}
if(key_can == 11) //密碼刪除
{
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); //開光標
}
if(key_can == 15) //確認鍵
{
value = 0;
for(i=0;i<6;i++)
{
if(password_bj[i] == password_gl[i]) //判斷管理員密碼
{
value ++;
if(value >= 6) //密碼正確
{
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; //密碼正確
relay = 0; //打開密碼鎖
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; //密碼不正確
}
}
clear_shuzu(dis_smg);
write_string(1,0," Password Lock ");
write_string(2,0," Input: ");
lcd1602_guanbiao(1,7+0x40); //開光標
menu_i = 0;
}
}
}
/****************修改密碼********************/
void xiugai_password()
{
if(key_can == 13) //修改密碼
{
if((relay == 0) && (menu_1 == 0))
{
menu_1 = 1; menu_i = 0;
clear_shuzu(password_bj); //數據清空
clear_shuzu(dis_smg);
write_string(1,0,"Input1: ");
write_string(2,0,"Input2: ");
lcd1602_guanbiao(1,7); //開光標
}
}
if(menu_1 == 1) //第一次輸入修改的密碼
{
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); //開光標
}
}
if(key_can == 11) //刪除鍵
{
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); //開光標
}
if(key_can == 15) //確定鍵
{
clear_shuzu(password_xg);
clear_shuzu(dis_smg);
lcd1602_guanbiao(1,8 + 0x40); //開光標
menu_1 = 2;
menu_i = 0;
key_can = 20;
}
}
if(menu_1 == 2) //第二次輸入修改的密碼
{
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); //開光標
}
}
if(key_can == 11) //刪除鍵
{
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); //開光標
}
if(key_can == 15) //確定鍵
{
for(i=0;i<6;i++)
{
if(password_bj[i] == password_xg[i])
{
flag_password = 1; //兩次輸入的密碼一樣
}
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; //提示三聲
delay_1ms(300);
}
beep = 1;
delay_1ms(1000);
break; //密碼不正確
}
}
if(flag_password == 1) //兩次輸入的密碼一樣的
{
for(i=0;i<6;i++)
{
write_string(1,0," Password ");
write_string(2,0," Succeed ");
password[i] = password_bj[i]; //保存密碼
}
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); //開光標
menu_1 = 0;
menu_i = 0;
}
}
}
/******************主程序**********************/
void main()
{
static uint value ;
password_chushifa();
time_init(); //定時器初始化
read_24c02_8(6,0,password);
init_1602();
beiguan = 0;
while(1)
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…………限于本文篇幅余下代碼請從51黑下載附件…………

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