基于51单片机的6位电子密码锁

#include<reg52.h> #define uint unsigned int #define uchar unsigned char void key_scan(); uchar count0,count1,count3,num,n=0,temp,a,j,count4; uchar mima[6]=0; //初始密码存储区 uchar tab_key[50]; //输入密码存储区 uchar code table[]={ 0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7c, 0x39,0x5e,0x79,0x71}; bit enterflag; //确认键按下与否的标志 bit mimaflag; //密码正确与否的标志 bit xiugaiflag; //修改密码标志 bit enter1flag; //修改密码确认键标志 sbit red=P2^2; sbit rs=P2^6; sbit rw=P2^5; sbit lcden=P2^7; sbit scl=P2^1; sbit sda=P2^0; uchar code table1[]="input pass word "; uchar code table2[]="de: ------"; uchar code table3[]="*"; uchar code table4[]="right (^_^) "; uchar code table5[]="first error!!!!"; uchar code table6[]="second error!!!!"; uchar code table7[]="third error see "; uchar code table8[]="u tomorrow (^_^)"; uchar code table9[]="define the passc"; uchar code table10[]="ode: ------"; uchar code table11[]="code is new"; void delay1() { ;; } void delay2(uchar x) { uchar a,b; for(a=x;a>0;a--) for(b=100;b>0;b--); } void delay(uint z) { uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); } //void start() //开始信号 //{ // sda=1; // delay1(); // scl=1; // delay1(); // sda=0; // delay1(); //} //void stop() //停止 //{ // sda=0; // delay1(); // scl=1; // delay1(); // sda=1; // delay1(); //} ////****************************应答信号************************************* //void respond() //{ // uchar i; // scl=1; // delay1(); // while((sda==1)&&(i<250))i++; // scl=0; // delay1(); //} ////*****************************写字节操作函数********************************** //void write_byte(uchar date) //{ // uchar i,temp; // temp=date; // for(i=0;i<8;i++) // { // temp=temp<<1; //保持最高位，左移到进位CY // scl=0; // delay1(); // sda=CY; // delay1(); // scl=1; // delay1(); // } // scl=0; // delay1(); // sda=1;//总线释放 // delay1(); //} ////*******************************读字节操作函数***************************** //uchar read_byte() //{ // uchar i,k; // scl=0; // delay1(); // sda=1; // delay1(); // for(i=0;i<8;i++) // { // scl=1; // delay1(); // k=(k<<1)|sda; //或运算，放到最低位 // scl=0; // delay1(); // } // return k; //} ////**********************************写地址函数****************************** //void write_add(uchar address,uchar date) //{ // start(); // write_byte(0xa0); // respond(); // write_byte(address); // respond(); // write_byte(date); // respond(); // stop(); //} ////*******************************读地址函数************************************* //uchar read_add(uchar address) //{ // uchar date; // start(); // write_byte(0xa0); // respond(); // write_byte(address); // respond(); // start(); // write_byte(0xa1); // respond(); // date=read_byte(); // stop(); // return date; //} void start() //开始信号 { sda=1; delay1(); scl=1; delay1(); sda=0; delay1(); } void stop() //停止 { sda=0; delay1(); scl=1; delay1(); sda=1; delay1(); } void respons() //应答 { uchar i; scl=1; delay1(); while((sda==1)&&(i<250))i++; scl=0; delay1(); } // void init() // { // sda=1; // delay(); // scl=1; // delay(); // } void write_byte(uchar date) { uchar i,temp; temp=date; for(i=0;i<8;i++) { temp=temp<<1; scl=0; delay1(); sda=CY; delay1(); scl=1; delay1(); // scl=0; // delay(); } scl=0; delay1(); sda=1; delay1(); } uchar read_byte() { uchar i,k; scl=0; delay1(); sda=1; delay1(); for(i=0;i<8;i++) { scl=1; delay1(); k=(k<<1)|sda; scl=0; delay1(); } return k; } void write_add(uchar address,uchar date) { start(); write_byte(0xa0); respons(); write_byte(address); respons(); write_byte(date); respons(); stop(); } uchar read_add(uchar address) { uchar date; start(); write_byte(0xa0); respons(); write_byte(address); respons(); start(); write_byte(0xa1); respons(); date=read_byte(); stop(); return date; } //****************************LCD1602的初始化******************************* void write_com(uchar com) { rs=0; lcden=0; P0=com; delay(5); lcden=1; delay(5); lcden=0; } void write_date(uchar date) { rs=1; lcden=0; P0=date; delay(5); lcden=1; delay(5); lcden=0; } bit mimacmp() { bit flag; uchar i; for(i=0;i<6;i++) { if(mima[i]==tab_key[i]) flag=1; else { flag=0; i=6; } } return(flag); //返回flag } void lcd_display() { uchar i=0; write_com(0x80+0x40+10); for(i=0;i<n;i++) { write_date(table3[0]); } } void key_manage1() { tab_key[n]=0; n++; if(xiugaiflag==1) { mima[count4]=0; count4++; } } void key_manage2() { tab_key[n]=1; n++; if(xiugaiflag==1) { mima[count4]=1; count4++; } } void key_manage3() { tab_key[n]=2; n++; if(xiugaiflag==1) { mima[count4]=2; count4++; } } void key_manage4() { tab_key[n]=3; n++; if(xiugaiflag==1) { mima[count4]=3; count4++; } } void key_manage5() { tab_key[n]=4; n++; if(xiugaiflag==1) { mima[count4]=4; count4++; } } void key_manage6() { tab_key[n]=5; n++; if(xiugaiflag==1) { mima[count4]=5; count4++; } } void key_manage7() { tab_key[n]=6; n++; if(xiugaiflag==1) { mima[count4]=6; count4++; } } void key_manage8() { tab_key[n]=7; n++; if(xiugaiflag==1) { mima[count4]=7; count4++; } } void key_manage9() { tab_key[n]=8; n++; if(xiugaiflag==1) { mima[count4]=8; count4++; } } void key_manage10() { tab_key[n]=9; n++; if(xiugaiflag==1) { mima[count4]=9; count4++; } } void key_manage11() { enterflag=1; //确认键按下 if(n==6) //只有输入8个密码后按确认才做比较 mima