lcd1602-4line.lst

D:电子制作LCD程序20076101323710046.rar

C51 COMPILER V7.02a   LCD1602_4LINE                                                        05/14/2007 19:15:17 PAGE 1   


C51 COMPILER V7.02a, COMPILATION OF MODULE LCD1602_4LINE
OBJECT MODULE PLACED IN LCD1602-4line.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE LCD1602-4line.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /*
   2                  LCD1602.c File
   3                  
   4                  Created by xiaorunyi
   5                  email: [e-mail]
   6                  May 2007
   7                  
   8          */
   9          
  10          #include "LCD1602.h"
  11          
  12          
  13          void LCD_Read_BF(void)
  14          {
  15   1              
  16   1              unsigned char read=0; 
  17   1              
  18   1              LCD1602_RW = HIGH;              //RW 1
  19   1              LCD1602_RS = LOW;               //RS 0
  20   1              LCD1602_EN = HIGH;              //EN 1  Read BF
  21   1              
  22   1              LCDIO = 0xFF;
  23   1              
  24   1              do{
  25   2                      read = LCDIO;
  26   2              }while(read&MSB);
  27   1              
  28   1              LCD1602_EN = LOW;               
  29   1      }
  30          
  31          void delay_1us(void)                 //1us延时函数
  32          {
  33   1          unsigned char i;
  34   1          for(i=0;i<1;i++);
  35   1      }
  36          
  37          void LCD_en_write(void)        //EN端产生一个高电平脉冲，写LCD
  38            {
  39   1          LCD1602_EN = HIGH;  
  40   1          delay_1us(); 
  41   1          LCD1602_EN = LOW;   
  42   1        }
  43          
  44          //*************************************
  45          void LCD_en_com(unsigned char command)
  46          {
  47   1              LCD_Read_BF(); 
  48   1              
  49   1              LCD1602_RS = LOW;       //RS 0 
  50   1              LCD1602_RW = LOW;               //RW 0 
  51   1              
  52   1              LCDIO &= 0x0F;
  53   1              LCDIO |= command&0xF0;
  54   1              
  55   1              LCD_en_write();
C51 COMPILER V7.02a   LCD1602_4LINE                                                        05/14/2007 19:15:17 PAGE 2   

  56   1              
  57   1              command = command << 4; 
  58   1              LCDIO &= 0x0F;
  59   1              LCDIO |= command&0xF0;
  60   1              LCD_en_write();
  61   1      }
  62          //*********************************
  63          void LCD_en_dat(unsigned char dat)
  64          {
  65   1              LCD_Read_BF();
  66   1              
  67   1              LCD1602_RS = HIGH;      //RS 1 
  68   1              LCD1602_RW = LOW;               //RW 0 
  69   1              
  70   1              LCDIO &= 0x0F;
  71   1              LCDIO |= dat&0xF0;
  72   1              
  73   1              LCD_en_write();
  74   1              
  75   1              dat = dat << 4;
  76   1              LCDIO &= 0x0F;
  77   1              LCDIO |= dat&0xF0;
  78   1              LCD_en_write();
  79   1      }
  80          //**********************************************
  81          void LCD_set_xy(unsigned char x,unsigned char y)
  82          {
  83   1              unsigned char address;
  84   1              if(x == LINE1)  
  85   1                      address = LINE1_HEAD + y;
  86   1              else                    
  87   1                      address = LINE2_HEAD + y;
  88   1              LCD_en_com(address); 
  89   1      }
  90          //****************************************************************
  91          /*void LCD_write_char(unsigned x,unsigned char y,unsigned char dat)
  92          {
  93                  LCD_set_xy(x,y); 
  94                  LCD_en_dat(dat);
  95          }*/
  96          //*********************************************************************
  97          void LCD_write_string(unsigned char x,unsigned char y,unsigned char *s)
  98          {
  99   1              LCD_set_xy(x,y); 
 100   1              while(*s)  
 101   1              {
 102   2                      LCDIO = *s;
 103   2                      LCD_en_dat(*s);   
 104   2                      s++;
 105   2              }
 106   1      }
 107          //****************/*********************
 108          void LCD_init(void)
 109          { 
 110   1              LCD_en_com(DATA_MODE);
 111   1                      //set 8 bit data transmission mode 
 112   1              LCD_en_com(OPEN_SCREEN);
 113   1                      //open display (enable lcd display)
 114   1              LCD_en_com(DISPLAY_ADDRESS);
 115   1                      //set lcd first display address 
 116   1              CLEARSCREEN;
 117   1                      //clear screen
C51 COMPILER V7.02a   LCD1602_4LINE                                                        05/14/2007 19:15:17 PAGE 3   

 118   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    155    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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