displed.lst

单片机与键盘接口程序

C51 COMPILER V7.50   DISPLED                                                               06/22/2007 13:22:29 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE DISPLED
OBJECT MODULE PLACED IN DispLED.OBJ
COMPILER INVOKED BY: f:\Keil\C51\BIN\C51.EXE DispLED.c BROWSE DEBUG OBJECTEXTEND TABS(2)

line level    source

   1          #include <intrins.h>
   2          #include "me.h"
   3          #include "disp.h"
   4          
   5          //此处定义数码管各段位置
   6          #define a   0x01    //D7
   7          #define b   0x02    //D6
   8          #define c   0x04    //D4
   9          #define d   0x08    //D3
  10          #define e   0x10    //D2
  11          #define f   0x20    //D0
  12          #define g   0x40    //D1
  13          #define dot 0x80    //D5
  14          extern unsigned char code seg[];
  15          //////////////////////////////
  16          
  17          //        ~(a+b+c+d+e+f),    // 共阳极
  18          //        (a+b+c+d+e+f),    // 共阴极
  19          //定义特殊符号
  20          //数码管显示时用的编码
  21          unsigned char code seg[] = 
  22          {
  23            ~(a+b+c+d+e+f),        // 0
  24            ~(b+c),                // 1
  25            ~(a+b+d+e+g),          // 2
  26            ~(a+b+c+d+g),          // 3
  27            ~(b+c+f+g),            // 4
  28            ~(a+c+d+f+g),          // 5
  29            ~(a+c+d+e+f+g),        // 6
  30            ~(a+b+c),             // 7
  31            ~(a+b+c+d+e+f+g),      // 8
  32            ~(a+b+c+d+f+g),        // 9
  33            ~(a+b+c+e+f+g),        //A
  34            ~(c+d+e+f+g),          //b
  35            ~(a+d+e+f),            //C
  36            ~(b+c+d+e+g),          //d
  37            ~(a+d+e+f+g),          //E
  38            ~(a+e+f+g)             //F
  39          };
  40          unsigned char stacode=0;
  41          char dispbuf[6];
  42          char low[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf};
  43          void put_num(char cnum)
  44          {
  45   1        P0=seg[ cnum & 0x0f];
  46   1      }
  47          
  48          void disp(void) 
  49          { 
  50   1        static  char disppoint;
  51   1      
  52   1        P2=P2|0x3f;
  53   1        put_num(dispbuf[disppoint]);
  54   1        //P0=seg[ dispbuf[disppoint] & 0x0f];
  55   1        if(disppoint==2 && stacode==1)  P0&=~dot; /* 小数点*/
C51 COMPILER V7.50   DISPLED                                                               06/22/2007 13:22:29 PAGE 2   

  56   1        P2=P2 & low[disppoint];
  57   1        if (disppoint++>=5) disppoint=0;
  58   1      
  59   1      } 


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     73    ----
   CONSTANT SIZE    =     16    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =     14    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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