密码锁课程设计

要求：

1.设计基于单片机控制的密码锁

2.基本功能要求：

a.12个按键，用于输入密码及设定，其中s/c分短按（clear）和长按（set）

b.两个led灯反映密码输入正确（绿灯亮），错误（红灯亮）

c.原始密码为：000000 应可随以修改（掉电新密码不丢失）

 

下面是我做的具体过程

下面是protues的截图如下（你可以照着在proteus中设置）：

 

代码贴出来，可以直接子啊uvision4上运行的。。。

//下面程序为密码锁控制程序，可实现设定密码，判断密码是否正确，并且掉电不丢失的功能

 

#include

//类型重定义

#define uchar unsigned char

#define uint unsigned int

 

 

//函数声明

void start();  //开始信号

uchar read_add(uchar);

void key_scan();

void write_add(uchar address,uchar date);

void delay1ms(uint z);

void delay();

void stop(); //停止

void respons();  //应答

void init();

void write_byte(uchar date);

uchar read_byte();

 

//全局变量声明

uchar key=0;

uchar password[6];

uchar KeyCnt;

uchar flag=0;

uchar password_err;

uchar ok_right;

 

//ii2c芯片的时钟线和数据线

sbit sda=P2^3;

sbit scl=P2^2;

 

//主函数

void main(){

    uchar temp,i;

    uchar password_err=0;

    uchar password_old[6]={0};

    KeyCnt=0;

    flag=0;

    ok_right=0;  

    password_err=0;

 

    init();        //ii2c芯片初始化

    for(i=0;i<6;i++){

       temp=read_add(i+1);  //调用ii2c芯片中的数据（已设定为6位）

      

       if(temp<0 || temp >9 ){     //如果读出的数据不对，说明为第一次使用密码锁，就初始化为0

           for(i=0;i<6;i++)

              password_old[i]=0;

           break;

       }

       password_old[i]=read_add(i+1); 

       delay1ms(10);

    } 

    key=255;     //默认key值设定为255，为了调试使用

     

    while(1){

       key_scan();   //扫描按键扫描函数

       if( key <= 9 ){

           password[KeyCnt]=key;

           P3=KeyCnt;   //输出调试信息

       }

 

       if(key == 11){       //对应于ok键，判断密码是否正确

           for(i=0;i<6;i++)

              if(password_old[i] != password[i]){

                  password_err=1;                       

                  break;

              }

           if(password_err==1){

               P2 =(P2&0xfc)|0x02;

               password_err=0;    

           }

           else {

               P2 =(P2 &0xfc)|0x01;

           }

       }

 

       if(key==10){     //对应于s/c键，进入重设密码子程序

           KeyCnt=0;

           ok_right=0;

           while(1){

              key_scan();

              //;//key=0;   key=16;

              if( key <= 9 ){

                  password[KeyCnt]=key;

                  P3=KeyCnt;

              }

 

              if(flag==2){ //长按

                  P2 =P2&0xfc;   //重设的话，双灯亮

                  if(ok_right==7&&key==11){

                     for(i=0;i<6;i++)

                     {   //重设的密码写入存储芯片中

                         write_add(i+1,password[i]);

                         delay1ms(10);

                     }

                     key=255;

                     KeyCnt=0;

                     ok_right=0;

                     break;

                  }

              }

              if(flag == 1){    //短按

                  for(i=0;i<6;i++){

                     write_add(i+1,0);

                     if((i+1)/2) P2 =(P2&0xfc)|0x02;

                     else   P2 =(P2&0xfc)|0x01; 

                     delay1ms(300);

                  }

                  KeyCnt=0;

                  ok_right=0;

                  key=255;  

                  break;

              }

           }

      

       }

    }  

   

}

 

/***************************下面为ii2c芯片操作函数集**************************/

void delay()

{ ;; }

 

void delay1ms(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;

    delay();

    scl=1;

    delay();

    sda=0;

    delay();

}

void stop()   //停止

{

    sda=0;

    delay();

    scl=1;

    delay();

    sda=1;

    delay();

}

void respons()  //应答

{

    uchar i;

    scl=1;

    delay();

    while((sda==1)&&(i<250))i++;

    scl=0;

    delay();

}

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;

        delay();

       sda=CY;

       delay();

       scl=1;

       delay();

    }

    scl=0;

    delay();

    sda=1;

    delay();

}

uchar read_byte()

{

    uchar i,k;

    scl=0;

    delay();

    sda=1;

    delay();

    for(i=0;i<8;i++)

    {

       scl=1;

       delay();  

       k=(k<<1)|sda;

       scl=0;

       delay();  

    }

    return k;

}

 

//向ii2c芯片中写入数据

void write_add(uchar address,uchar date)

{

    start();

    write_byte(0xa0);

    respons();

    write_byte(address);

    respons();

    write_byte(date);

    respons();

    stop();

}

 

//从ii2c芯片中读出数据

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;

}

 

 

/***************************下面为按键扫描函数**************************/

void key_scan()

{  

       uchar m0,m1;

       uchar temp;   

      

       P1=0xf0;//这样设置是为了能使低四位将高四位拉低，释放时自动拉高高四位 

       temp=P1;      

       if(temp!=0xf0)

       {             

              delay1ms(10);         //延时，去除抖动

              if(temp!=0xf0)

              {    

                     m0=temp;       //获得按键的列号(对应的就是高4位)            

                     P1=0x0f;

                     temp=P1;

                     if(temp!=0x0f)

                     {    

                          m1=temp;       //获得按键的行号(对应的就是低4位)     

                         temp=m0|m1;   //组合成最终的按键好

                     }    

                  KeyCnt++;

                  if(KeyCnt==7)

                     KeyCnt=0;

                  ok_right++;

                  if(ok_right==8)

                     ok_right=0;

                     switch(temp)

                     {

 

                          case 0xee:key=0;break;  //按键对应的码表

                            case 0xde:key=1;break;

                            case 0xbe:key=2;break;

                            case 0x7e:key=3;break;                                

                            case 0xed:key=4;break;

                            case 0xdd:key=5;break;

                            case 0xbd:key=6;break;

                            case 0x7d:key=7;break;                                 

                            case 0xeb:key=8;break;

                            case 0xdb:key=9;break;

                            case 0xbb:

                         key=10;

                         P1=0x0f;                       

                         delay1ms(700);

                         temp=P1;

                         if(temp == 0x0f) //短按

                            flag=1;

                         else

                            flag=2;       //长按                         

                         break;

                            case 0x7b:key=11;break;                          

                         default:key=16;break; 

                     }

                    do{

                             temp=P1;      //消除按起抖动

                            temp&=0X0f;

                     }while(temp!=0x0f);

              }

       }

}

 

 

以上内容就可以满足要求。。。。