ir.lst

买板子时赠的实验例子

C51 COMPILER V7.50   IR                                                                    02/05/2006 17:44:55 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE IR
OBJECT MODULE PLACED IN IR.OBJ
COMPILER INVOKED BY: D:\Program Files\Keil\C51\BIN\C51.EXE IR.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /*******************************************
   2            数码管显示遥控器键值程序
   3          ********************************************
   4            
   5           功能：每按下一键时数码管显示一位,当8个数码管显示完毕,重新从第一个开始显示
   6          
   7           作者：伟纳电子网友 dk_wang
   8           
   9           出处：伟纳电子论坛 www.willar.com
  10          
  11          ********************************************/
  12          
  13          
  14          
  15          
  16          
  17          #include <reg52.h>
  18          #include <intrins.h>
  19          #define uchar unsigned char
  20          
  21          /*******************************************
  22          函数定义声明区
  23          *******************************************/
  24          uchar m;
  25          
  26          void delay(unsigned char m);
  27          bit k_scan_estimate(void);     //flag 为1时表明有按键;按下否则无;
  28               bit flag;                   //按键有无按下标志位;
  29                   uchar key_initialization;   //按键初始化值;
  30                   uchar key_prevenvient;      //按键前一状态值
  31          
  32          uchar key_dispose();
  33               uchar key_h;        
  34                   uchar key_l;
  35                   uchar key;  
  36               uchar key_before;//键值前一状态;
  37          
  38          
  39          
  40            uchar key_word(uchar key_m);//由键码值得出按键所对应的状态值;
  41               uchar code digital_val[]={0xc0,0xf9,0xa4,0xb0,//0123
  42                                         0x99,0x92,0x82,0xf8,//4567
  43                                         0x80,0x90,0x88,0x00,//89AB
  44                                         0x46,0x40,0x86,0x8e};//CDEF
  45              uchar word_inx_before;
  46              uchar word_inx;
  47          
  48          uchar data display_buffer[8]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
  49          uchar buffer_i;//计数变量
  50          uchar f;//位码变量
  51          uchar r;//段码变量
  52          uchar k;
  53          
  54          
  55          void buzzer(void);//响片驱动程序
C51 COMPILER V7.50   IR                                                                    02/05/2006 17:44:55 PAGE 2   

  56            uchar buzzer_i;
  57            sbit buzzer_voice=P3^7;
  58            uchar buzzer_ii;
  59          
  60          
  61          
  62          /********************************************/
  63          
  64          
  65          void main(void)
  66          {
  67   1        f=0;
  68   1        r=0xfe;
  69   1        TMOD=0x01;
  70   1        EA=1;
  71   1        ET0=1;
  72   1        TH0=-2000/256;
  73   1        TL0=-2000%256;
  74   1        
  75   1      
  76   1        TR0=1;
  77   1      while(1)
  78   1         {
  79   2         k_scan_estimate();
  80   2         if(flag)
  81   2         {
  82   3          key_dispose();
  83   3              if(flag)
  84   3              {     buzzer();
  85   4                 if(buffer_i==0)
  86   4                   {
  87   5                       for(k=0;k<8;k++)
  88   5                         {display_buffer[k]=0xff;}
  89   5                        }
  90   4              display_buffer[buffer_i]=digital_val[key_word(key_dispose())];
  91   4              buffer_i++;
  92   4              buffer_i&=0x07;
  93   4          flag=0;
  94   4      }
  95   3      }
  96   2      }
  97   1      }
  98          
  99          /*******************************
 100          定时器0中断入口
 101          ********************************/
 102          
 103          void timer0(void) interrupt 1
 104          {
 105   1         TR0=0;
 106   1         TH0=-2000/256;
 107   1         TL0=-2000%256;
 108   1         P0=display_buffer[f];
 109   1         f++;
 110   1         f&=0x07;
 111   1         P2=r;
 112   1         r=_crol_(r,1);
 113   1         TR0=1;
 114   1       }
 115          
 116          
 117          
C51 COMPILER V7.50   IR                                                                    02/05/2006 17:44:55 PAGE 3   

 118          bit k_scan_estimate(void) //键盘状态判断,当有按下时标志位置位否则标志位为0;
 119          {
 120   1         key_initialization=0xf0;
 121   1         P1=key_initialization;
 122   1         key_initialization=P1;
 123   1      
 124   1         if(key_initialization^key_prevenvient)
 125   1            {
 126   2                    delay(50);
 127   2      
 128   2                       if(key_initialization^key_prevenvient)
 129   2                         {
 130   3                         key_prevenvient=key_initialization;
 131   3                         return(flag=1);
 132   3                         }
 133   2                      }
 134   1               else return(flag=0);
 135   1             
 136   1      }
 137          
 138          
 139          
 140          
 141           uchar key_dispose()//按键处理,当有按键按下时将返回键码值
 142           {key_before=key;
 143   1          key_l=0xfe;
 144   1      
 145   1          while(1)
 146   1              {
 147   2          P1=key_l;
 148   2              key_h=key_l=P1;
 149   2              if((key_l&0xf0)!=0xf0)
 150   2                 {
 151   3                  key_l&=0x0f;
 152   3                      key_h=P1&0xf0;
 153   3                      key=key_l|key_h;
 154   3                      return(key);
 155   3                      }
 156   2                else
 157   2                {
 158   3                 key_l=_crol_(key_l,1);
 159   3                 if((key_l&0x0f)==0x0f)
 160   3                     {
 161   4                           flag=0;
 162   4                       return(key_before);
 163   4                         }
 164   3                 }
 165   2               }
 166   1        }
 167          
 168          
 169            uchar key_word(uchar key_m)//输入键码值返回段码值;
 170            {
 171   1      
 172   1      
 173   1        uchar data key_val[]={0xee,0xed,0xeb,0xe7,//0,1,2,3
 174   1                               0xde,0xdd,0xdb,0xd7,//4,5,6,7
 175   1                               0xbe,0xbd,0xbb,0xb7,//8,9,A,B
 176   1                               0x7e,0x7d,0x7b,0x77};//C,D,E,F;
 177   1        uchar *pp=key_val;
 178   1               word_inx=0;
 179   1      for(;*pp!=key_m;pp++)
C51 COMPILER V7.50   IR                                                                    02/05/2006 17:44:55 PAGE 4   

 180   1        {   word_inx++;
 181   2          if(pp>(key_val+0x0f)){return(word_inx_before);}
 182   2        }
 183   1       word_inx_before=word_inx;
 184   1        return(word_inx);
 185   1        }
 186          
 187          
 188          
 189            void delay(uchar m)  //延时程式
 190            {
 191   1        uchar n;
 192   1        while(m--)
 193   1        {
 194   2        for(n=250;n>0;n--);
 195   2        }
 196   1      
 197   1        }
 198          
 199          
 200          
 201          
 202            void buzzer(void)
 203            {
 204   1         
 205   1        
 206   1        for(buzzer_ii=150;buzzer_ii>0;buzzer_ii--)
 207   1        {
 208   2           for(buzzer_i=250;buzzer_i>0;buzzer_i--)
 209   2           { 
 210   3            buzzer_voice=~buzzer_voice;
 211   3                }
 212   2         }
 213   1         
 214   1         }
 215          
 216             
 217          
 218          
 219          
 220          
 221          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    357    ----
   CONSTANT SIZE    =     32    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =     23      20
   IDATA SIZE       =   ----    ----
   BIT SIZE         =      1    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)