lcd.lst

单片机开发板源码 适合初学者 第四部分 字符型LCD显示1-2

C51 COMPILER V7.06   LCD                                                                   09/13/2007 01:39:04 PAGE 1   


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

stmt level    source

   1          /*实验名称：字符型LCD接口实验
   2            功能：在LCD上显示
   3                   AT89S51 DEMO
   4                  www.mcuprog.com
   5            作者：http://www.mcuprog.com
   6                  05-02-01
   7          */
   8          #include <reg51.h>
   9          sbit E=P2^2;
  10          sbit RW=P2^1;
  11          sbit RS=P2^0;   
  12          typedef unsigned char uchar;
  13          //-------------------------------------
  14          void Delay(unsigned int t)   // delay 40us
  15          {
  16   1       for(;t!=0;t--) ;
  17   1      }
  18          //=============================================
  19          void SendCommandByte(unsigned char ch)
  20          {
  21   1         RS=0;
  22   1         RW=0;
  23   1         P0=ch;
  24   1         E=1;
  25   1          Delay(1);
  26   1         E=0;
  27   1         Delay(100);  //delay 40us
  28   1      }
  29          //-------------------------------------------------------
  30          void SendDataByte(unsigned char ch)
  31          {  RS=1;
  32   1         RW=0;
  33   1         P0=ch;
  34   1         E=1;
  35   1             Delay(1);
  36   1         E=0;
  37   1         Delay(100); //delay 40us
  38   1      }
  39          //-------------------------------------------------
  40          void InitLcd()
  41          {SendCommandByte(0x30);
  42   1       SendCommandByte(0x30);
  43   1       SendCommandByte(0x30);
  44   1       SendCommandByte(0x38); //设置工作方式
  45   1       SendCommandByte(0x0c); //显示状态设置
  46   1       SendCommandByte(0x01); //清屏
  47   1       SendCommandByte(0x06); //输入方式设置
  48   1      }
  49          //=============================================
  50          void DisplayMsg1(uchar *p)
  51          { 
  52   1       unsigned char count;
  53   1       SendCommandByte(0x80);  //设置DDRAM地址
  54   1       for(count=0;count<16;count++)
  55   1          {SendDataByte(*p++);
C51 COMPILER V7.06   LCD                                                                   09/13/2007 01:39:04 PAGE 2   

  56   2              }
  57   1      } 
  58          //=============================================
  59          void DisplayMsg2(uchar *p)
  60          { 
  61   1       unsigned char count;
  62   1       SendCommandByte(0xc0);  //设置DDRAM地址
  63   1       for(count=0;count<16;count++)
  64   1          {SendDataByte(*p++);
  65   2              }
  66   1      }
  67          //=============================================
  68          main()
  69          {char msg1[16]="  AT89S51 DEMO  ";
  70   1       char msg2[16]="www.mcuprog.com ";
  71   1       InitLcd();
  72   1       DisplayMsg1(msg1);
  73   1       DisplayMsg2(msg2);
  74   1       while(1);
  75   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    218    ----
   CONSTANT SIZE    =     32    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----      38
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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