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- #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[8]; //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=P3^7;
- sbit bell=P3^6;
- sbit rs=P3^0;
- sbit rw=P3^1;
- sbit lcden=P3^2;
- sbit scl=P2^0;
- sbit sda=P2^1;
- uchar code table1[]="input the passco";
- 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";
- //******************************键盘消抖函数*******************************
- void delay1()
- { ;; }
- void delay2(uchar x)
- { uchar a,b;
- for(a=x;a>0;a--)
- for(b=100;b>0;b--);
- }
- //***************************延时********
- void delay(uint z)
- { uint x,y;
- for(x=z;x>0;x--)
- for(y=110;y>0;y--);
- }
- //****************************e^2room的初始化*******************************
- 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;
- }
- //****************************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;
- }
- //***************************************密码比较函数********************************
- bit mimacmp()
- { bit flag;
- uchar i;
- for(i=0;i<8;i++)
- { if(mima[i]==tab_key[i])
- flag=1;
- else
- { flag=0;
- i=8;
- }
- }
- return(flag); //返回flag
- }
- ////**********************************LCD显示函数开始**************************************
- void lcd_display()
- { uchar i=0;
- write_com(0x80+0x40+8);
- for(i=0;i<n;i++)
- { write_date(table3[0]);
- }
- }
- //****************************************键盘功能分配函数群开始****************************
- //** 0 ** 1 **2 ** 3**
- //** 4** 5** 6 **7 **
- //**8** 9** 确认(A) **无效(B)
- //**取消(C)**修改密码键(D)**确认修改键(E)**无效(F)
- 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++;
- }
- }
- //**********************************确认键**************************************************************
- void key_manage11()
- { enterflag=1; //确认键按下
- if(n==8) //只有输入8个密码后按确认才做比较
- mimaflag=mimacmp();
- else
- mimaflag=0;
- if(enterflag==1)
- {
- enterflag=0;
- n=0;
- //用FFFFFFFF清除已经输入的密码
- for(count3=0;count3<8;count3++)
- {
- delay(5);
- tab_key[count3]=0x0f;
- }
- TR1=1; //打开计数器1
- count1=0; //定时器1由50MS累计到1S所用的计数器
- if(mimaflag==1)
- { a=0;
- write_com(0x01);
- write_com(0x80);
- for(count3=0;count3<16;count3++)
- { write_date(table4[count3]); //密码正确,显示RIGHT,绿灯亮
- delay(5);
- }
- }
- else
- { n=0;
- red=0;
- bell=0;
- a++;
- if(a==1)
- {
- for(count3=0;count3<8;count3++) //ffffffff清除密码
- {
- delay(5);
- tab_key[count3]=0x0f;
- }
- write_com(0x01);
- write_com(0x80);
- for(count3=0;count3<16;count3++)
- {
- write_date(table5[count3]); //密码错误,显示 first error,红灯亮
- delay(5);
- }
- TR1=1;
- }
- if(a==2)
- {
- for(count3=0;count3<8;count3++) //ffffffff清除密码
- {
- delay(5);
- tab_key[count3]=0x0f;
- }
- write_com(0x01);
- write_com(0x80);
- for(count3=0;count3<16;count3++)
- {
- write_date(table6[count3]); //密码错误,显示SECOND ERROR,红灯亮
- delay(5);
- }
- TR1=1;
- }
- if(a==3)
- {
- for(count3=0;count3<8;count3++) //ffffffff清除密码
- {
- delay(5);
- tab_key[count3]=0x0f;
- }
- write_com(0x01);
- write_com(0x80);
- for(count3=0;count3<16;count3++)
- {
- write_date(table7[count3]); //密码错误,显示third error see,红灯亮
- delay(5);
- }
- write_com(0x80+0x40);
- for(count3=0;count3<16;count3++)
- {
- write_date(table8[count3]);//密码错误,显示 U TOMORROW ,红灯亮
- delay(5);
- }
- TR1=0;
- }
- }
- }
- }
- void key_manage12()
- { tab_key[n]=11;
- n++; //密码计数清零
- }
- //****************************************************取消键********************************************
- void key_manage13()
- { n=0; //密码计数清零
- write_com(0x80); //指针所指位置
- for(count3=0;count3<16;count3++)
- { write_date(table1[count3]); //第一行显示INPUT THE PASSPORD:
- delay(5);
- }
- write_com(0x80+0x40);
- for(count3=0;count3<16;count3++)
- { write_date(table2[count3]); //开机显示--------
- delay(5);
- tab_key[count3]=0x0f; //用FFFFFFFF清楚已经输入的密码
- }
- }
- //*******************************************修改密码键**********************************
- void key_manage14()
- { uchar aa=0;
- n=0;
- xiugaiflag=1;
- write_com(0x01);
- write_com(0x80);
- for(count3=0;count3<16;count3++)
- { write_date(table9[count3]); //显示define the password
- delay(5);
- tab_key[count3]=0x0f; //用FFFFFFFF清楚已经输入的密码
- }
- write_com(0x80+0x40);
- for(count3=0;count3<16;count3++)
- { write_date(table10[count3]); //显示--------
- delay(5);
- }
- TR0=1;
- }
- //******************************************修改密码键的确认键********************************
- void key_manage15()
- { n=0;
- enter1flag=1;
- if(enter1flag==1)
- { enter1flag=0;
- count4=0;
- for(count3=0;count3<16;count3++)
- { tab_key[count3]=0x0f; //用FFFFFFFF清楚已经输入的密码
- }
- write_com(0x01);
- write_com(0x80);
- for(count3=0;count3<16;count3++)
- { write_date(table11[count3]);
- delay(100);
- }
- TR1=1;
- count1=0;
- }
- }
- void key_manage16()
- { tab_key[n]=15;
- n++;
- }
- //****************************************定时器1的50MS,共延时1秒*****************************
- void time_1() interrupt 3
- { TH1=(65536-50000)/256;
- TL1=(65536-50000)%256;
- if(count1<20)
- { count1++;
- }
- else //计时到1S
- { TR1=0;
- count1=0;
- mimaflag=0;
- red=1;
- bell=1;
- //显示FFFFFFFF
- write_com(0x01);
- write_com(0x80);
- for(count3=0;count3<16;count3++)
- {
- write_date(table1[count3]); //显示INPUT THE PASSCODE
- delay(5);
- }
- write_com(0x80+0x40);
- for(count3=0;count3<16;count3++)
- {
- write_date(table2[count3]); //开机显示FFFFFFFF
- delay(5);
- }
- }
- }
- //***********************************************定时0**********************************************
- void time_0() interrupt 1
- { TH0=(65536-50000)/256;
- TL0=(65536-50000)%256;
- if(count4<8)
- { key_scan();
- }
- else
- { TR0=0;
- count4=0;
- }
- }
- //初始化函数
- void init()
- { uchar i;
- lcden=0;
- write_com(0x38); //打开显示模式设置
- write_com(0x0c); //打开显示,光标等等设置未零
- write_com(0x06); //当读或写一个字符后地址指针加一,且光标加一,当写一个字符后整频显示左移,
- write_com(0x01); //清零指令
- write_com(0x80); //指针所指位置
- //定时器初始化
- TMOD=0x11; //T0,T1工作方式1
- TH0=(65536-2000)/256;
- TL0=(65536-2000)%256; //T0初始化2MS
- TH1=(65536-50000)/256;
- TL1=(65536-50000)%256; //T1初始化50MS
- TR1=0;
- ET1=1;
- EA=1;
- TR0=0;
- ET0=1;
- count0=0; //初始没有密码输入,故为零
- enterflag=0; //没有确认键按下
- mimaflag=0; //密码正确与否键先置零
- red=1; //红灯不亮
- //************密码存入EPROM中**********************************
- sda=1;
- delay(5);
- scl=1;
- delay(5);
- for(i=0;i<8;i++)
- { write_add(i,8);
- delay2(100);
- }
- for(i=0;i<8;i++)
- { mima[i]=read_add(i);
- delay(5);
- }
- }
- void main()
- {
- P1=0x0f;
- rw=0;
- init();
- write_com(0x80); //指针所指位置
- for(count3=0;count3<16;count3++)
- { write_date(table1[count3]); //第一行显示INPUT THE PASSPORD:
- delay(5);
- }
- write_com(0x80+0x40);
- for(count3=0;count3<16;count3++)
- { write_date(table2[count3]); //开机显示FFFFFFFF
- delay(5);
- }
- while(1)
- { key_scan(); //调用键盘扫描函数
- lcd_display();
- }
- }
- //***************键盘扫描函数开始********************************
- void key_scan()
- {//**********扫描第一行*********
- P1=0xfe;
- temp=P3;
- temp=temp&0xf0;
- if(temp!=0xf0)
- { delay(100);
- if(temp!=0xf0)
- { temp=P3;
- switch(temp)
- { case 0xee:
- key_manage1(); break;
- case 0xde:
- key_manage2(); break;
- case 0xbe:
- key_manage3(); break;
- case 0x7e:
- key_manage4(); break;
- }
- while(temp!=0xf0)
- { temp=P3;
- temp=temp&0xf0;
- }
- }
- }
- //**************扫描第二行***********************************
- P1=0xfd;
- temp=P3;
- temp=temp&0xf0;
- if(temp!=0xf0)
- { delay(100);
- if(temp!=0xf0)
- { temp=P3;
- switch(temp)
- { case 0xed:
- key_manage5(); break;
- case 0xdd:
- key_manage6(); break;
- case 0xbd:
- key_manage7(); break;
- case 0x7d:
- key_manage8(); break;
- }
- while(temp!=0xf0)
- { temp=P3;
- temp=temp&0xf0;
- }
- }
- }
- //*********************************************扫描第三行***********************************
- P1=0xfb;
- temp=P3;
- temp=temp&0xf0;
- if(temp!=0xf0)
- { delay(100);
- if(temp!=0xf0)
- { temp=P3;
- switch(temp)
- { case 0xeb:
- key_manage9(); break;
- case 0xdb:
- key_manage10(); break;
- case 0xbb:
- key_manage11(); break;
- case 0x7b:
- key_manage12(); break;
- }
- while(temp!=0xf0)
- { temp=P3;
- temp=temp&0xf0;
- }
- }
- }
- //***************************************************扫描第四行****************************************
- P1=0xf7;
- temp=P3;
- temp=temp&0xf0;
- if(temp!=0xf0)
- { delay(100);
- if(temp!=0xf0)
- { temp=P3;
- switch(temp)
- { case 0xe7:
- key_manage13(); break;
- case 0xd7:
- key_manage14(); break;
- case 0xb7:
- key_manage15(); break;
- case 0x77:
- key_manage16(); break;
- }
- while(temp!=0xf0)
- { temp=P3;
- temp=temp&0xf0;
- }
- }
- }
- }
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