C51 COMPILER V8.02   LCD                                                                   05/18/2002 13:46:58 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE LCD
OBJECT MODULE PLACED IN lcd.OBJ
COMPILER INVOKED BY: D:\keil\新建文件夾\C51\BIN\C51.EXE lcd.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <c8051f020.h>
   2          #define uchar unsigned char
   3          #define uint  unsigned int
   4          
   5          
   6          void Lcd1602_Write_Command(uchar Command_Code);
   7          void Lcd1602_Write_Data(uchar row,uchar column,uchar Data);     //row取1或2，column取0到15
   8          void Lcd1602_Write_String(uchar row,uchar column,uchar *dis_buffer);
   9          void delay(uint t1,t2);
  10          
  11          void Lcd1602_initial( )
  12          {  
  13   1          Lcd1602_Write_Command(0x38);//顯示模式設置
  14   1          Lcd1602_Write_Command(0x0c);//開顯示，顯示光標，光標閃爍
  15   1          Lcd1602_Write_Command(0x01);//顯示清屏。
  16   1          Lcd1602_Write_Command(0x06);//顯示光標自動右移，整屏不移動。
  17   1      
  18   1          Lcd1602_Write_Command(0x80);//將數據指針設置到第一行的第一個字符。
  19   1          Lcd1602_Write_Command(0x02);//數據指針清零
  20   1          Lcd1602_Write_Command(0x0c);//開顯示，顯示光標,光標閃爍
  21   1          Lcd1602_Write_Command(0x80);//將數據指針設置到第一行的第一個字符。
  22   1         
  23   1      }    
  24          
  25          
  26          //===========================
  27          //寫一個命令字節
  28          //===========================
  29          void Lcd1602_Write_Command(uchar Command_Code)
  30          {
  31   1          P4=0x00;                       //RS=0,RW=0
  32   1          P5=Command_Code;
  33   1          delay(10,1);
  34   1          P4 |=0x04;                      //EN=1
  35   1          delay(10,10);
  36   1          P4 &=~0x04;                    //EN=0            
  37   1                      
  38   1      }
  39          //===========================
  40          //寫一個字節數據
  41          //===========================
  42          
  43          void Lcd1602_Write_Data(uchar row,uchar column,uchar Data)
  44          {
  45   1      
  46   1          if (row==2) 
  47   1              column |= 0x40; //當要顯示第二行時地址碼+0x40;
  48   1              column |= 0x80; // 算出指令碼
  49   1      
  50   1          Lcd1602_Write_Command(column); //這里不檢測忙信號，發送地址碼
  51   1      
  52   1          P4=0x01;                     //RS=1,RW=0
  53   1          P5=Data;    
  54   1          delay(10,10);
  55   1          P4 |=0x04;                   //EN=1
C51 COMPILER V8.02   LCD                                                                   05/18/2002 13:46:58 PAGE 2   

  56   1          delay(10,10);
  57   1          P4 &=~0x04;                  //EN=0
  58   1      
  59   1      }
  60          
  61          
  62          //===========================================
  63          //寫字符串到LCD，如果一行寫不下，則寫到下一行，
  64          //如果一屏寫不下，則只寫一屏
  65          //row的值從1-2，column的值從1-16，不進行值的
  66          //有效性檢查，有調用者自己保證
  67          //===========================================
  68          
  69          void Lcd1602_Write_String(uchar row,uchar column,uchar *dis_buffer)
  70          {
  71   1          uchar i=0;
  72   1             
  73   1          while(dis_buffer[i]!='\0')
  74   1              {
  75   2                  Lcd1602_Write_Data(row,column,dis_buffer[i]);
  76   2                  i++;column++;
  77   2                  if(column==40)
  78   2                  {               
  79   3                      column=1;
  80   3                      row++;
  81   3                      if(row==2)
  82   3                          return;
  83   3                      else
  84   3                      {
  85   4                        switch(row)//這種結構保持以后升級到多行顯示液晶
  86   4                        {
  87   5                          case 1:Lcd1602_Write_Command(0x80);break;
  88   5                          case 2:Lcd1602_Write_Command(0x80+0x40);break;//重新調整數據地址指針
  89   5                          default:break;
  90   5                        }
  91   4                      }
  92   3                  }
  93   2              } 
  94   1      }                       
  95             
  96          void delay(uint t1,t2)
  97          {   
  98   1         long int i,j;               //為什么不能改為uint ，一改即有問題  
  99   1         for(i=1;i<t1;i++)
 100   1            for(j=1;j<t2;j++);
 101   1          
 102   1      }
 103           
 104           


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    313    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----      17
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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