51

51单片机大量源码

C51 COMPILER V8.02   BMKG                                                                  12/31/2009 09:50:56 PAGE 1   


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

line level    source

   1          #include <reg52.h>
   2          sbit     BMA    = P1^4;//编码开关A引脚
   3          sbit     BMB    = P1^5;//编码开关B引脚
   4          sbit     BMC    = P1^6;//编码开关 下按引脚
   5          
   6          unsigned char  display[3];
   7          unsigned char  code  LEDData[ ] = { 
   8             0xC0,0xF9,0xA4,0xB0,0x99,0x92,
   9             0x82,0xF8,0x80,0x90,0xff
  10          }; 
  11          unsigned char  counter = 0;     //编码器脉冲计数 
  12          unsigned char  n,shift;
  13          
  14          /**********************************************************
  15          
  16          ms延时子函数
  17          
  18          **********************************************************/
  19          void delayms(unsigned int ms)
  20          {
  21   1        unsigned char k;
  22   1      
  23   1        while (ms--)
  24   1        {
  25   2          for (k = 0; k < 114; k++)
  26   2            ;
  27   2        }
  28   1      }
  29          
  30          /**********************************************************
  31          
  32          扫描编码器子函数
  33          
  34          在编码器引脚A为低电平期间：
  35          
  36          编码器引脚B从0到1为正转，编码器引脚B从1到0为反转。
  37          
  38          **********************************************************/
  39          void scan_encoder(void) 
  40          { 
  41   1         static  bit  Curr_b;  //定义一个变量来储存当前B信号 
  42   1         static  bit  Last_b;  //定义一个变量来储存上次B脚信号 
  43   1         static  bit  update= 0;
  44   1      
  45   1         if( BMA && BMB)           //编码器无转动退出
  46   1         {
  47   2           update = 0; 
  48   2           return;
  49   2         }
  50   1      
  51   1         Last_b = BMB;       //记录B信号
  52   1      
  53   1         while(!BMA)                //等待A由低变高
  54   1         { 
  55   2           Curr_b = BMB;     //记录等待期间的B信号(指当前B信号)
C51 COMPILER V8.02   BMKG                                                                  12/31/2009 09:50:56 PAGE 2   

  56   2           update = 1;
  57   2         
  58   2              if(!BMC)                //当按下旋钮时
  59   2           {
  60   3             counter = 0;            //计数单元清零(归位)
  61   3             delayms(10);
  62   3           }
  63   2         
  64   2         
  65   2         } 
  66   1      
  67   1         if(update)
  68   1         {
  69   2         update = 0 ;
  70   2           if( (Last_b == 0)&&(Curr_b== 1) ) //B从0到1为正转
  71   2           { 
  72   3         if(counter == 255)
  73   3             return;
  74   3             counter++;          //正转计数加
  75   3           } 
  76   2           else if( (Last_b == 1)&&(Curr_b == 0) ) //B从1到0为反转
  77   2           { 
  78   3             if(counter == 0)
  79   3             return;
  80   3             counter--;         //反转计数减
  81   3           } 
  82   2         }
  83   1      }
  84          
  85          /**********************************************************
  86          
  87          主函数
  88          
  89          **********************************************************/
  90          void  main(void)
  91          {
  92   1         P0 = 0xff;
  93   1         P1 = 0xff;
  94   1         P2 = 0xff;
  95   1      
  96   1         T2CON = 0x00;               //设置T2CON寄存器         
  97   1         TH2 = 0xfc;                 //1ms定时
  98   1         TL2 = 0x66;
  99   1         ET2 = 1;                    //启用Timer2中断
 100   1         EA = 1;                     //总中断允许
 101   1         TR2 = 1;                    //启动定时器2
 102   1         counter = 0;                //计数单元清零
 103   1      
 104   1         while(1)
 105   1         {
 106   2      
 107   2         scan_encoder();
 108   2          if(!BMC)                //当按下旋钮时
 109   2           {
 110   3             counter = 0;            //计数单元清零(归位)
 111   3             delayms(10);
 112   3           } 
 113   2         }
 114   1      }
 115          
 116          /*********************************************************
 117          
C51 COMPILER V8.02   BMKG                                                                  12/31/2009 09:50:56 PAGE 3   

 118          Timer2中断函数
 119          
 120          **********************************************************/
 121          void  timer2() interrupt 5 
 122          { 
 123   1         TR2 = 0;
 124   1         TF2 = 0;                         //手工清中断标志  
 125   1         TH2 = 0xfc;                      //1ms定时常数
 126   1         TL2 = 0x66;
 127   1      
 128   1         if(n >= 3)                       //3位数码管显示
 129   1         {
 130   2           n = 0;
 131   2           shift = 0x7f;                  //送位码初值
 132   2           P2 = 0xff;                     //关闭显示
 133   2         }
 134   1         else
 135   1         {
 136   2           display[0] = counter%10;       //个位数据
 137   2           display[1] = (counter%100)/10; //十位数据
 138   2           display[2] = counter/100;      //百位数据
 139   2           
 140   2           if(display[2] == 0)
 141   2           {
 142   3             display[2] = 0x0a;           //百位为0,不显示
 143   3             if(display[1] == 0)
 144   3             display[1]  =0x0a;           //十位为0,不显示
 145   3      }
 146   2      
 147   2           P0 = LEDData[display[n++]];    //送段码
 148   2           P2 = shift;                    //送位码
 149   2           shift = (shift>>1)|0x80;       //调整位码
 150   2         }
 151   1         TR2 = 1;
 152   1      }
 153          
 154          /*********************************************************/


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    258    ----
   CONSTANT SIZE    =     11    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      6    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =      3    ----
END OF MODULE INFORMATION.


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