lcd1602.lst

1602LCD移动显示字符C,对于刚刚学习LCD显示的人有帮助

C51 COMPILER V7.02a   LCD1602                                                              05/13/2007 12:40:07 PAGE 1   


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

stmt level    source

   1                                                                          //********************************************************
   2          //      LCD1602.c File
   3          //      Created by xiaorunyi
   4          //      email: [e-mail]
   5          //*********************************************************
   6          #include "LCD1602.h"
   7          
   8          
   9          void LCD_Read_BF(void)
  10          {
  11   1              
  12   1              unsigned char read=0; 
  13   1              
  14   1              LCD1602_RW = HIGH;              //RW 1
  15   1              LCD1602_RS = LOW;               //RS 0
  16   1              LCD1602_EN = HIGH;              //EN 1  Read BF
  17   1              
  18   1              LCDIO = 0xFF;
  19   1              
  20   1              do{
  21   2                      read = LCDIO;
  22   2              }while(read&MSB);
  23   1              
  24   1              LCD1602_EN = LOW;               
  25   1      }
  26          
  27          void delay_1us(void)                 //1us延时函数
  28          {
  29   1          unsigned char i;
  30   1          for(i=0;i<1;i++);
  31   1      }
  32          
  33          void LCD_en_write(void)              //EN端产生一个高电平脉冲，写LCD
  34            {
  35   1          LCD1602_EN = HIGH;  
  36   1          delay_1us(); 
  37   1          LCD1602_EN = LOW;   
  38   1        }
  39          
  40          //********************************************************
  41          void LCD_en_com(unsigned char command)
  42          {
  43   1              LCD_Read_BF(); 
  44   1              
  45   1              LCD1602_RS = LOW;       //RS 0 
  46   1              LCD1602_RW = LOW;               //RW 0 
  47   1              
  48   1              LCDIO &= 0x0F;
  49   1              LCDIO |= command&0xF0;
  50   1              
  51   1              LCD_en_write();
  52   1              
  53   1              command = command << 4; 
  54   1              LCDIO &= 0x0F;
  55   1              LCDIO |= command&0xF0;
C51 COMPILER V7.02a   LCD1602                                                              05/13/2007 12:40:07 PAGE 2   

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


C51 COMPILER V7.02a   LCD1602                                                              05/13/2007 12:40:07 PAGE 3   

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)