基于51单片机+AC24C04+LCD1602显示的电子密码锁程序源代码及电路仿真.zip

#include <reg52.h> #include "delay_ms.h" #include "矩阵键盘.h" #include "i2c.h" #include "1602.h" #include "delay_ms.h" #include "mima.h" #define uchar unsigned char #define uint unsigned int #define A 0x0a //输入密码 #define B 0x0b //修改密码 #define D 0x0d //关锁 #define enter 0x0c //确认 #define backspace 0x0f //退格键 sbit baojing = P3^7; //蜂鸣器接口 sbit lock = P3^3;//锁信号 sbit set = P3^2; uchar idata mima_5[6] = {1,2,3,4,5,6}; //初始密码 uchar flag_change; uchar aa;//存放密码错误的次数，够三次报警 uchar bb; uchar flag_t0; void baoj1()//报警函数 { int i; for(i = 0;i < 5; i++) { baojing = 1; delay_ms(5); baojing = 0; delay_ms(5); } } void baoj() { uchar i; for(i = 0; i < 10; i++) baoj1(); } /*密码处理函数*/ void mimachuli() { uchar key,i; uchar idata mima_1[6]={' ',' ',' ',' ',' ',' '};//存放密码缓冲区 uchar idata mima_2[6]={' ',' ',' ',' ',' ',' '}; uchar idata mima_3[6]={' ',' ',' ',' ',' ',' '}; key = step_choose(); if(key == A)//A被按下,接收输入密码，处理 { read_n_add(mima_1,0x00,6); write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_com(0x0f);//显示光标 lcd_pos(0,0); write_n_char(" press password "); if(input_mima(mima_2)) //处理输入密码 { if(mimaduibi(mima_2,mima_1)) //密码正确 { lcd_pos(0,0); write_com(0x0c); write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_n_char(" password right "); aa = 0; //清除密码错误次数 lock = 0; //开锁 baojing = 1; //响一下 delay_ms(1000); baojing = 0; TR0 = 1; flag_t0 = 1; while(key != D && flag_t0) //D没按下一直开 { key = keyscan(); } TR0 = 0; lock = 1;//D按下了关锁 } else //密码 不正确 { lcd_pos(0,0); write_com(0x0c); //关光标 write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_n_char(" password wrong"); delay_ms(1000); aa++; if(aa == 4) { aa = 0; i = 20; //密码不正确报警 while(i--) baoj(); } } } else //密码没有输入正确或完成 { lcd_pos(0,0); write_com(0x0c); //关光标 write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_n_char(" password wrong"); delay_ms(1000); aa++; if(aa == 4) { aa = 0; i = 20; //密码不正确报警 while(i--) baoj(); } } } if(key == B)//B被按下,修改密码 { read_n_add(mima_1,0x00,6); write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_com(0x0f);//显示光标 lcd_pos(0,0); write_n_char(" input password"); write_com(0x0f);//显示光标 if(input_mima(mima_2)) //处理输入密码 { if(mimaduibi(mima_2,mima_1)) //密码正确 { lcd_pos(0,0); write_com(0x0c); write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_n_char("password right "); aa = 0; //清除密码错误次数 delay_ms(1500); flag_change = 1; while(flag_change) //下面开始修改密码 { write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_com(0x0f);//显示光标 lcd_pos(0,0); write_n_char("In new password"); delay_ms(1500); if(input_mima(mima_2)) //处理输入密码 { lcd_pos(0,0); write_com(0x0c); write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_n_char("Input new pass"); //确定新密码 lcd_pos(1,0); write_n_char("word again"); delay_ms(2000); lcd_pos(0,0); write_com(0x0f);//显示光标 write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_n_char("In new password"); if(input_mima(mima_3)) //处理输入密码 { if(mimaduibi(mima_2,mima_3)) //密码正确 { lcd_pos(0,0); write_com(0x0c); write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_n_char("password has"); lcd_pos(1,0); write_n_char("change already"); write_n_add(mima_3,0x00,6); //把修改的密码存进24C02 delay_ms(2000); flag_change = 0; } else //密码 不正确 { lcd_pos(0,0); write_com(0x0c); //关光标 write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_n_char("password wrong"); delay_ms(1000); aa++; if(aa == 4) { aa = 0; i = 20; //3次输入密码不正确报警 while(i--) baoj(); } flag_change = 0; } } else //密码没有输入正确或完成 { lcd_pos(0,0); write_com(0x0c); //关光标 write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_n_char(" password wrong"); delay_ms(1000); aa++; if(aa == 4) { aa = 0; i = 20; //3次输入密码不正确报警 while(i--) baoj(); } } } else //密码没有输入正确或完成 { lcd_pos(0,0); write_com(0x0c); //关光标 write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_n_char("password wrong"); delay_ms(1000); flag_change = 0; aa++; if(aa == 4) { aa = 0; i = 20; //3次输入密码不正确报警 while(i--) baoj(); } } } } else //密码 不正确 { lcd_pos(0,0); write_com(0x0c); //关光标 write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_n_char("password wrong"); delay_ms(1000); aa++; if(aa == 4) { aa = 0; i = 20; //3次输入密码不正确报警 while(i--) baoj(); } } } else //密码没有输入正确或完成 { lcd_pos(0,0); write_com(0x0c); //关光标 write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_n_char("password wrong"); delay_ms(1000); aa++; if(aa == 4) { aa = 0; i = 20; //3次输入密码不正确报警 while(i--) baoj(); } } } } /*外部中断函数，恢复出厂设置,长按set键恢复*/ void int0() interrupt 0 { delay_ms(2000); if(!set) { lcd_pos(0,0); write_com(0x0c); //关光标 write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 i2cinit();//24C02总线初始化 write_n_add(mima_5,0x00,6); write_n_char("password renew"); lcd_pos(1,0); write_n_char("already"); delay_ms(1000); lcd_pos(0,0); write_com(0x0c); //关光标 write_com(0x06);//写一个字符后地址指针加 1 write_com(0x01);//显示清零，数据指针清零 write_n_char("Input password"); lcd_pos(1,0); write_n_char("Press key A"); }// 引起了三个警告 } void main() { yjinit();//液晶初始化 i2cinit();//24C02总线初始化 baojing = 0; lock = 1; //关锁 TMOD = 0x01;//选择定时器0方式1 EA = 1;//打开总中断 ET0 = 1;//打开定时器0中断 EX0 = 1; //打开外部中断0 IT0 = 1;//下降沿触发 TR0 = 0;//关闭定时器 TH0 = 0x4c;//50ms装初值 TL0 = 0x00; while(1) { mimachuli(); } }