//-----------------------------------------------------------------
//原始程序中相鄰兩位密碼不能相同.
//本壓縮包中的HEX由修改后的新程序編譯生成,允許輸入任意密碼.
//-----------------------------------------------------------------
//實(shí)訓(xùn)100例中本例內(nèi)的main函數(shù)可用以下代碼替換.
//改動(dòng)的主要是main函數(shù)中while循環(huán)內(nèi)的代碼.
//-----------------------------------------------------------------
// 主程序
//-----------------------------------------------------------------
void main()
{
   uchar i = 0;
   uchar IIC_Password[10];
   uchar IS_Valid_User = 0;
   P0 = 0xFF;     
   P1 = 0xFF;
   P2 = 0xFF;  

   TMOD = 0x02;                     //T0設(shè)置為8位自動(dòng)重裝模式
   TH0 = 175;                  
   TL0 = 175;
   TR0 = 1;                         //啟動(dòng)T0

   DelayMS(10);                
   LCD_Init();                      //初始化LCD  
   
   IIC_24C04_Init();                //初始化24C04  
   
   Display_String(Title_Text,0x00); //在第1行顯示標(biāo)題
   
   //24C04的內(nèi)容已由初始化BIN文件導(dǎo)入
   //將24C04中預(yù)先寫(xiě)入的密碼讀入pass
   RecString(0xa0, 0 , IIC_Password, 6);   
   IIC_Password[6] = '\0';

   while(1)
   { 
      P1 = 0xF0;
      if(P1 != 0xF0) KeyNo = Keys_Scan();  //掃描鍵盤(pán)獲取鍵序號(hào)KeyNo
 
      switch ( KeyNo )
      {
           case 0:  case 1: case 2: case 3: case 4: 
           case 5:  case 6: case 7: case 8: case 9:
                        
                   if ( i<= 5 )             //密碼限制在6位以內(nèi)
                   {
                        //如果i為0則執(zhí)行一次清屏
                        if (i ==0) Display_String("                ",0x40);
                    
                        UserPassword[i] = KeyNo + '0';
                        UserPassword[i+1] = '\0';
              
                        DSY_BUFFER[i] = '*';
                        DSY_BUFFER[i+1] = '\0';
                    
                        Display_String(DSY_BUFFER,0x40);
                     
                        i++;
                    }
                    break;
                
           case 10: //按A鍵開(kāi)鎖
                    if (strcmp(UserPassword,IIC_Password) == 0) 
                    {
                       LED_OPEN = 0;  //點(diǎn)亮LED
                       Clear_Password();
                       Display_String("Unlock OK!      ",0x40);
                       IS_Valid_User = 1;
                    }
                    else 
                    {
                       LED_OPEN =1;   //關(guān)閉LED
                       Clear_Password();
                       Display_String("ERROR !         ",0x40);
                       IS_Valid_User = 0;
                    }
                    i = 0;
                    break;
                    
           case 11: //按B鍵上鎖
                    LED_OPEN =1;   
                    Clear_Password();
                    Display_String(Title_Text,0x00);
                    Display_String("                ",0x40);
                    i = 0;                         
                    IS_Valid_User = 0;               
                    break;
                                   
           case 12: //按C鍵設(shè)置新密碼
                    //如果是合法用戶則提示輸入新密碼
                    if ( !IS_Valid_User ) Display_String("No rights !",0x40);
                    else 
                    {
                       i = 0;
                       Display_String("New Password:   ",0x00);
                       Display_String("                ",0x40);
                     }
           
                    break;                        
                    
           case 13: //按D鍵保存新密碼
                    if ( !IS_Valid_User ) Display_String("No rights !",0x40);
                    else 
                    {
                       SendString(0xa0, 0 , UserPassword, 6);
                       
                       //重新讀入剛寫(xiě)的密碼
                       RecString(0xa0, 0 , IIC_Password, 6);   
                       IIC_Password[6] = '\0';                           
                       
                       i = 0;
                       Display_String(Title_Text,0x00);
                       Display_String("Password Saved! ",0x40);
                     }               
                    
                    break;                        
       
           case 14: //按E鍵消除所有輸入
                    i = 0;
                    Clear_Password();
                    Display_String("                ",0x40);            
       }
 
       Beep();          
       DelayMS(100);
       P1= 0xF0;
       while (P1 != 0xF0);    //如果有鍵未釋放則等待
       while (P1 == 0xF0);    //如果沒(méi)有再次按下按鍵則等待
   }
}