display.lst

应用案例

C51 COMPILER V7.07   DISPLAY                                                               06/13/2008 13:33:19 PAGE 1   


C51 COMPILER V7.07, COMPILATION OF MODULE DISPLAY
OBJECT MODULE PLACED IN display.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE display.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #include <reg52.h>
   2          
   3          #define comm  0
   4          #define dat   1
   5          
   6          sbit RS = P3^3;   //H=data; L=command;
   7          sbit RW = P3^4;   //H=read; L=write;
   8          sbit  E = P3^5;   //input enable;
   9          sbit busy=P1^7;   //lcd busy bit
  10          
  11          void chk_busy (void)
  12          {
  13   1        P1=0xff;
  14   1        RS=0;
  15   1        RW=1;
  16   1        E =1;
  17   1        while(busy==1);
  18   1        E =0;
  19   1      }
  20          
  21          /*---------------------------------------*/
  22          void write_lcd (unsigned char dat_comm,unsigned char content)
  23          {
  24   1        chk_busy ();
  25   1        if(dat_comm)
  26   1          {
  27   2           RS=1;   RW=0;   //write data
  28   2          }
  29   1        else
  30   1          {
  31   2           RS=0;   RW=0;   //write command
  32   2          }
  33   1        P1=content;   //output data or comm
  34   1        E=1;
  35   1        E=0;
  36   1      }
  37          
  38          
  39          void clrram (void)
  40          {
  41   1        write_lcd (comm,0x30);
  42   1        write_lcd (comm,0x01);
  43   1      }
  44          
  45          
  46          void init_lcd (void)
  47          {
  48   1        write_lcd (comm,0x30);  /*30---基本指令动作*/
  49   1        write_lcd (comm,0x01);  /*清屏，地址指针指向00H*/
  50   1        write_lcd (comm,0x06);  /*光标的移动方向*/
  51   1        write_lcd (comm,0x0c);  /*开显示，关游标*/
  52   1      }
  53          
  54          
  55          void line_disp (unsigned char lines , unsigned char *chn)
C51 COMPILER V7.07   DISPLAY                                                               06/13/2008 13:33:19 PAGE 2   

  56          { 
  57   1        unsigned char i;
  58   1        write_lcd (comm,0x30);
  59   1        switch (lines)
  60   1          {
  61   2               case 0: write_lcd (comm,0x80);for (i=0;i<16;i++)write_lcd (dat,chn[i]);break;
  62   2           case 1: write_lcd (comm,0x90);for (i=0;i<16;i++)write_lcd (dat,chn[i]);break;
  63   2           case 2: write_lcd (comm,0x88);for (i=0;i<16;i++)write_lcd (dat,chn[i]);break;
  64   2           case 3: write_lcd (comm,0x98);for (i=0;i<16;i++)write_lcd (dat,chn[i]);break;
  65   2          }
  66   1      }
  67          
  68                          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    186    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       3
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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