電路原理圖如下：
仿真原理圖如下（proteus仿真工程文件可到本帖附件中下載）
密碼鎖按鍵排列操作說明
矩陣鍵盤按鍵說明
1 2 3 確認鍵
4 5 6 手動關閉鎖
7 8 9 修改密碼
密碼還原 0 刪除鍵 退出鍵
單片機源程序如下:
- #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[9]={0};
- uchar password[7]={8,7,6,5,4,3,2,1}; //密碼保存
- uchar password_bj[7]={1,2,3,4,5,6,7,8}; //密碼比較
- uchar code password_r[8] = {1,1,1,1,1,1,1,1} ;
- uchar code password_gl[8] = {5,2,0,0,2,5,1,1} ;
- uchar password_xg[8]; //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<9;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(8,0,password_r);
- delay_1ms(200);
- read_24c02_8(8,0,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 < 8) //密碼輸入
- {
- 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];
- password_bj[0] = key_can;
- for(i=0;i<smg_i;i++)
- dis_smg[i] ='*';//0x40 + password_bj[i];
- write_string(2,7,dis_smg);
- lcd1602_guanbiao(1,7 + menu_i + 0x50); //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 + 0x50); //開光標
- }
- if(key_can == 15) //確認鍵
- {
- value = 0;
- for(i=0;i<8;i++)
- {
- if(password_bj[i] == password_gl[i]) //判斷管理員密碼
- {
- value ++;
- if(value >= 8) //密碼正確
- {
- write_string(2,0," return ");
- beep = 0;
- delay_1ms(200);
- read_24c02_8(8,0,password);
- beep = 1;
- delay_1ms(2000);
- }
- }
- }
- if(value < 8)
- for(i=0;i<8;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<8;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<8;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+0x50); //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 < 8)
- {
- menu_i ++;
- if(menu_i > 8)
- menu_i = 8;
- smg_i = menu_i;
- for(i=9;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(1,9,dis_smg);
- lcd1602_guanbiao(1,9 + 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(1,9,dis_smg);
- lcd1602_guanbiao(1,9 + menu_i); //開光標
- }
- if(key_can == 15) //確定鍵
- {
- clear_shuzu(password_xg);
- clear_shuzu(dis_smg);
- lcd1602_guanbiao(1,8 + 0x50); //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 < 8)
- {
- menu_i ++;
- if(menu_i > 8)
- menu_i = 8;
- for(i=7;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] ='*';//0x40 + password_xg[i];
- write_string(2,7,dis_smg);
- lcd1602_guanbiao(1,7 + menu_i + 0x50); //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 + 0x50); //開光標
- }
- if(key_can == 15) //確定鍵
- {
- for(i=0;i<8;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<8;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<8;i++)
- {
- write_string(1,0," Password ");
- write_string(2,0," Succeed ");
- password[i] = password_bj[i]; //保存密碼
- }
- write_24c02_8(8,0,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+0x50); //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(8,0,password);
- init_1602();
- beiguan = 0;
- while(1)
- ……………………
- …………限于本文篇幅 余下代碼請從51黑下載附件…………
所有資料51hei提供下載:
dianzimimasuo.zip
(834.88 KB, 下載次數: 184)
2018-9-18 20:35 上傳
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