基于51单片机的的电子密码锁设计.rar

#include<reg52.h> //包含头文件，一般情况不需要改动，头文件包含特殊功能寄存器的定义 #include"lcd1602.h" #include"i2c.h" typedef unsigned int u16; //对数据类型进行声明定义 typedef unsigned char u8; sbit BUZZER=P2^3; //蜂鸣器控制引脚 sbit LED=P3^4; #define GPIO_KEY P1 //4X4矩阵键盘输入 unsigned char KeyValue; //用来存放读取到的键值 unsigned char saved_Value[6]; //初始密码 unsigned char input_Value[6]; unsigned char input[]="input a password"; unsigned char old[]="old password "; unsigned char new[]="new password "; unsigned char Right_flg=0,Right_flg0=0;//密码输入正确标志 unsigned char set_flg=0,LOCK_flg=0; //修改密码和锁定标志 unsigned char temp00; unsigned int time_cnt,delay_ddll; long int DECvalue=0; u8 ding,dong,flag,stop; u16 n; /******************************************************************************* * 函 数 名 : delay * 函数功能 : 延时函数，i=1时，大约延时10us *******************************************************************************/ void delay(unsigned int s) { while(s--); } //蜂鸣器 void beep1(void) //按键响声 { BUZZER=0; Lcd1602_Delay1ms(5); BUZZER=1; } void beep2(void) //输入错误 { BUZZER=0; Lcd1602_Delay1ms(100); BUZZER=1; } void beep3(void) //三次输入错误 { char u=100; while(u--) { BUZZER=~BUZZER; } } //存储芯片存储的内容 /*=============================================== 地址： 0 1 2 3 4 5 6 7 数据：无 密码 密码 密码 密码 密码 密码 错误次数 =================================================*/ //门铃输入正确 void biaohaoinit() //各个标号初始化 { ding=0; //叮声音 计数标志 dong=0; //咚声音 计数标志 n=0; //定时0.5s标志 flag=0; stop=0; //结束标志 } void TimerConfiguration(void); //定时中断 void KeyDown(); //检测按键函数 void At24c02Write(unsigned char addr,unsigned char dat); unsigned char At24c02Read(unsigned char addr); void clear_window(); void Lcd1602_Delay1ms(); //主函数 void main() { char i=0,j=0,k=0; unsigned char u; clear_window(); TimerConfiguration(); //初始化定时器 LcdInit(); //液晶初始化 for(i=0;i<16;i++) { // LcdWriteCom(0x80); LcdWriteData(input[i]); } delay(100); // for(u=0;u<6;u++) // { // At24c02Write(u+1,0); // delay(1000); //间隔一段时间扫描 // } At24c02Write(7,0); ////清除错误输入次数 delay(1000); //间隔一段时间扫描 for(u=0;u<6;u++) { saved_Value[u]=At24c02Read(u+1); delay(100); //间隔一段时间扫描 } LED=1; BUZZER=1; while(1) { KeyDown(); //按键扫描 //输入密码 if (KeyValue<=14 && !set_flg && !LOCK_flg) //有按键按下 { LcdWriteCom(0x80); LcdWriteData('I'); LcdWriteData('N'); LcdWriteData('P'); LcdWriteData('U'); LcdWriteData('T'); beep1(); input_Value[i]=KeyValue; if (Right_flg0) { clear_window(); //错误清屏 Right_flg0=0; } LcdWriteCom(0x80+0x40+i); //显示当前按键的值 LcdWriteData('*'); i++; if(i>=6) //判断 { Right_flg0=0; for (j=0;j<6;j++) { if (input_Value[j]!=saved_Value[j]) Right_flg0=1; } clear_window(); TR0=0; if(!Right_flg0) //密码输入正确 { TR0=1; //打开定时器0 while(!stop); LED=0; Lcd1602_Delay1ms(1000); LED=1; clear_window(); LcdWriteCom(0x80+i); LcdWriteData('O'); LcdWriteData('P'); LcdWriteData('E'); LcdWriteData('N'); LcdWriteData('!'); Lcd1602_Delay1ms(1000); // TR0=1; //打开定时器0 // while(!stop); // LED=0; // Lcd1602_Delay1ms(5); // LED=1; clear_window(); LcdWriteCom(0x80); LcdWriteData('I'); LcdWriteData('N'); LcdWriteData('P'); LcdWriteData('U'); LcdWriteData('T'); At24c02Write(7,0); //清除错误输入次数 } else { LED=1; // BUZZER=0; //声音报警 // delay(10000); // BUZZER=1; //声音报警 beep2(); LcdWriteCom(0x80+i); LcdWriteData('W'); LcdWriteData('R'); LcdWriteData('O'); LcdWriteData('N'); LcdWriteData('G'); Lcd1602_Delay1ms(500); clear_window(); LcdWriteCom(0x80); LcdWriteData('I'); LcdWriteData('N'); LcdWriteData('P'); LcdWriteData('U'); LcdWriteData('T'); temp00=At24c02Read(7); ////存储输入错误次数 if (temp00>=2) //连续输入错误超过3次 { clear_window(); LOCK_flg=1; // BUZZER=0; //声音报警 // Lcd1602_Delay1ms(2000); //// BUZZER=1; //声音报警 // beep3(); LcdWriteCom(0x80+5); LcdWriteData('C'); LcdWriteData('L'); LcdWriteData('0'); LcdWriteData('S'); LcdWriteData('E'); BUZZER=0; //声音报警 Lcd1602_Delay1ms(2000); } At24c02Write(7,temp00+1); } i=0; } } //修改密码 if (KeyValue<=14 && set_flg && !LOCK_flg) //有按键按下 KeyValue!=64 { input_Value[k]=KeyValue; LcdWriteCom(0x80+k); //显示当前按键的值 LcdWriteData('*'); k++; if(k>=6) //判断 { if (set_flg==2) { for (j=0;j<6;j++) { saved_Value[j]=input_Value[j]; At24c02Write(j+1,saved_Value[j]); delay(1000); //间隔一段时间扫描 } clear_window(); set_flg=0; delay_ddll =1; LcdWriteCom(0x80+6); LcdWriteData('O'); LcdWriteData('K'); Lcd1602_Delay1ms(1000); clear_window(); LcdWriteCom(0x80); LcdWriteData('I'); LcdWriteData('N'); LcdWriteData('P'); LcdWriteData('U'); LcdWriteData('T'); } if (set_flg==1) {///============================================ Right_flg=0; for (j=0;j<6;j++) { if(input_Value[j]!=saved_Value[j]) Right_flg=1; } clear_window(); if(!Right_flg) ///旧密码输入正确 { set_flg=2; ///可以进行下一步操作 LcdWriteCom(0x80+0x40); for(i=0;i<16;i++) { // LcdWriteCom(0x80); LcdWriteData(new[i]); } } else { LcdWriteCom(0x80+5); LcdWriteData('W'); LcdWriteData('R'); LcdWriteData('O'); LcdWriteData('N'); LcdWriteData('G'); Lcd1602_Delay1ms(1000); clear_window(); LcdWriteCom(0x80); LcdWriteData('I'); LcdWriteData('N'); LcdWriteData('P'); LcdWriteData('U'); LcdWriteData('T'); temp00=At24c02Read(7); ////存储输入错误次数 if (temp00>=2) { LOCK_flg=1; clear_window(); LcdWriteCom(0x80+6); LcdWriteData('C'); LcdWriteData('L'); LcdWriteData('O'); LcdWriteData('S'); LcdWriteData('0'); } At24c02Write(7,temp00+1); } } ///============================================ k=0; } } //修改密码 if (KeyValue==0x0F && !LOCK_flg) //有按键按下 { clear_window(); set_flg=1; LcdWriteCom(0x80+0x40); // for(i=0;i<16;i++) { // LcdWriteCom(0x80); LcdWriteData(old[i]); } k=0; //================= } } } /**********************