8255a.lst

KeilC开发,51通过8255对外部4*4键盘进行控制.按键分别为0-9以及上下左右,加上确认取消.

C51 COMPILER V7.06   8255A                                                                 08/27/2005 19:02:34 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE 8255A
OBJECT MODULE PLACED IN 8255A.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 8255A.C BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #include <reg51.h>
   2          #include <8255A.h>
   3          
   4          sbit RST = P1^4;
   5          
   6          void Init8255A()
   7          {
   8   1              int i;
   9   1      
  10   1          i = 5000;
  11   1              RST = 1;
  12   1              while (i--);
  13   1              RST = 0;
  14   1              SelectForm0(0,0,0,0);
  15   1      }
  16          
  17          void SelectForm0(char A, char C1, char C2, char B)
  18          {
  19   1              char temp;
  20   1      
  21   1              temp = 0x80;
  22   1              temp = temp | A<<4 | C1<<3 | C2 | B<<1;
  23   1              Commd = temp;
  24   1      }
  25          
  26          void SetCBit(char index, bit value)
  27          {
  28   1              char temp;
  29   1      
  30   1              temp = index << 1;
  31   1              if (value) temp++;
  32   1              Commd = temp;
  33   1      }
  34          
  35          
  36          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     68    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       4
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----       1
END OF MODULE INFORMATION.


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