16key_c.lst

单片机仿真实例大全

C51 COMPILER V8.02   16KEY_C                                                               06/04/2006 15:15:07 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE 16KEY_C
OBJECT MODULE PLACED IN 16key_c.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 16key_c.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          //调试程序成功，只是不知什么原因，显示不正常
   2          //预期目的：按键显示键值
   3          
   4          #include<reg51.h>
   5          #include<stdio.h>
   6          #include<absacc.h>
   7          
   8          
   9          #define unchar unsigned char 
  10          #define unint unsigned int
  11          
  12          unchar code LEDSEG[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
  13                                  0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};
  14          unchar temp,i,j;
  15          unchar dis_buf[]={16,16,16,0};            //显示3个空格和一个0
  16          void display(void);
  17          void keyscan(void);
  18          unchar testkey(unchar); 
  19          void delay(void);
  20          //===============================================================================
  21          void main(void)
  22          {IT0=1;                                           //外部中断0初始化
  23   1       EX0=1;
  24   1       EA=1;
  25   1       P2=0xff;
  26   1       P0=0xff;
  27   1       while(1)
  28   1              {display();}
  29   1      }
  30          
  31          //********************************************************************************
  32          void key_int(void) interrupt 0
  33          {
  34   1       unchar temp_h,temp_l,keynum;          //行码 列码 键值
  35   1       unchar code_h,code_l;
  36   1       if(testkey(0xf0))
  37   1              {
  38   2               temp_l=0;
  39   2               temp_h=0;                                                //功能：扫描键盘并更新显示缓冲区
  40   2           code_l=0xfe;
  41   2           while(temp_l<0x04)
  42   2                  {
  43   3                       if(testkey(code_l)==1)
  44   3                         {
  45   4                          code_h=P2;                  
  46   4                              if(P2^4==0) temp_h=0x00;
  47   4                              else if(P2^5==0)temp_h=0x04;
  48   4                          else if(P2^6==0)temp_h=0x08;
  49   4                              else temp_h=0x0c;
  50   4                              while(testkey(0xf0)){;}          //等待按键放开
  51   4                              break;
  52   4                         }
  53   3                       else{code_l=code_l<<1|0x01;
  54   4                        temp_l++;
  55   4                               }
C51 COMPILER V8.02   16KEY_C                                                               06/04/2006 15:15:07 PAGE 2   

  56   3              }       
  57   2           keynum=temp_h+temp_l;               //更新显示缓冲区
  58   2           dis_buf[0]=dis_buf[1];
  59   2               dis_buf[1]=dis_buf[2];
  60   2               dis_buf[2]=dis_buf[3];
  61   2               dis_buf[3]=keynum;
  62   2              }
  63   1      }
  64                  
  65          
  66          //----------------------------------------
  67          unchar testkey(unchar scan_code )   //测试是否有键按下，scan_code是扫描码，返回1说明有键按下
  68          {
  69   1        unchar temp;
  70   1        P2=scan_code;
  71   1        delay();            //延时1ms防抖   ／／1ms不够，最好是20ms !!!!!!!!!!!!!!!!!
  72   1        temp=P2;
  73   1        if((~temp)&0xf0)  return (1);
  74   1              else   return (0);
  75   1      } 
  76          
  77          //********************************************************************************
  78          void display(void)                          //显示4位数
  79          {
  80   1       unchar i,disbit;
  81   1       disbit=0xfe;
  82   1       
  83   1       for(i=0;i<4;i++)
  84   1              {
  85   2              //P0=LEDSEG[dis_buf[i]];
  86   2           P2=disbit;                     //选中要显示的管
  87   2               P0=LEDSEG[dis_buf[i]];    //要先选中，才能输出显示数据！！！！！！！！！！！
  88   2               delay();
  89   2               disbit=disbit<<1;                        //改变位码
  90   2           disbit++;
  91   2               }
  92   1              
  93   1      }
  94          //================================================================================
  95          /*void delay(void)                //
  96          {EA=1;
  97          ET0=1;
  98          TMOD=0x01;
  99          TH0=0xFC;
 100          TL0=0x18;
 101          TR0=1;
 102          while(!TF0);
 103          TF0=0;
 104          }       */
 105          
 106          void delay(void)  // 延时1ms
 107          {
 108   1        int a=0;
 109   1        for(a=0;a<1000;a++);
 110   1       }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    253    ----
   CONSTANT SIZE    =     17    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
C51 COMPILER V8.02   16KEY_C                                                               06/04/2006 15:15:07 PAGE 3   

   DATA SIZE        =      7       6
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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