lcd1602.lst

51单片机

C51 COMPILER V7.02a   LCD1602                                                              08/28/2007 09:34:36 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          #include"reg52.h"
   2          
   3          //*******************LCD模块
   4          //*******************LCD模块
   5          #define LCD_DATA P1        //LCD的数据口
   6          
   7          sbit LCD_BUSY=LCD_DATA^7;  //LCD忙信号位
   8          
   9          sbit LCD_RW=P0^1;          //LCD读写控制
  10          sbit LCD_RS=P0^0;          //LCD寄存器选择
  11          sbit LCD_EN=P0^2;          //LCD使能信号
  12          
  13          
  14          
  15          
  16          void LCD_check_busy(void)   //检测LCD状态，看它是不是还在忙呢
  17          {
  18   1       while(1)
  19   1        {
  20   2         LCD_EN=0;
  21   2         LCD_RS=0; //指令寄存器通信
  22   2         LCD_RW=1;  //read data
  23   2         LCD_DATA=0xff;
  24   2         LCD_EN=1;
  25   2         if(!LCD_BUSY)break;
  26   2        }
  27   1       LCD_EN=0;
  28   1      }
  29          
  30          void LCD_cls(void)          //LCD清屏
  31          {
  32   1       
  33   1       LCD_check_busy();
  34   1       LCD_RS=0;
  35   1       LCD_RW=0;
  36   1       LCD_DATA=1;
  37   1       LCD_EN=1;
  38   1       LCD_EN=0;
  39   1       
  40   1      }
  41          
  42          void LCD_write_instruction(unsigned char LCD_instruction)   //写指令到LCD
  43          {
  44   1       LCD_check_busy();
  45   1       LCD_RS=0;
  46   1       LCD_RW=0;      //写数据
  47   1       
  48   1       LCD_DATA=LCD_instruction;
  49   1       LCD_EN=1;
  50   1       LCD_EN=0;
  51   1       }
  52          
  53          void LCD_write_data(unsigned char LCD_data)      //输出一个字节数据到LCD
  54          {
  55   1       LCD_check_busy();
C51 COMPILER V7.02a   LCD1602                                                              08/28/2007 09:34:36 PAGE 2   

  56   1       LCD_RS=1;
  57   1       LCD_RW=0;
  58   1       
  59   1       LCD_DATA=LCD_data;
  60   1       LCD_EN=1;
  61   1       LCD_EN=0;
  62   1       }
  63           
  64          void LCD_set_position(unsigned char x)            //LCD光标定位到x处
  65          {
  66   1      LCD_write_instruction(0x80+x);
  67   1      }
  68          
  69          
  70          
  71          
  72          
  73          void LCD_printc(unsigned char lcd_data)          //输出一个字符到LCD
  74          {
  75   1       LCD_write_data(lcd_data);
  76   1      }
  77          
  78          void LCD_prints(unsigned char *lcd_string)       //输出一个字符串到LCD
  79          {
  80   1       unsigned char i=0;
  81   1       while(lcd_string[i]!=0x00)
  82   1        {
  83   2         LCD_write_data(lcd_string[i]);
  84   2         i++;
  85   2        } 
  86   1      }
  87          
  88          void LCD_initial(void)                        //初始化LCD
  89          {
  90   1       LCD_write_instruction(0x3c);
  91   1       LCD_write_instruction(0x0c);
  92   1       LCD_write_instruction(0x06);//显示屏一定要不移动。
  93   1       LCD_cls();
  94   1      }
  95          //*************************LCD模块结束
  96          
  97          void main()
  98          {
  99   1       LCD_initial();
 100   1       LCD_set_position(0);
 101   1       LCD_prints("www.lcrfan.com");
 102   1       LCD_set_position(0x40);
 103   1       LCD_prints(" QQ:46808933");
 104   1      while(1)
 105   1      {}
 106   1      
 107   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    153    ----
   CONSTANT SIZE    =     28    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       3
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
C51 COMPILER V7.02a   LCD1602                                                              08/28/2007 09:34:36 PAGE 3   

END OF MODULE INFORMATION.


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