1602.lst

89le52单片机 不读忙信号对lcd进行控制,非常实用,节约端口

C51 COMPILER V7.06   1602                                                                  11/17/2007 00:19:47 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE 1602
OBJECT MODULE PLACED IN 1602.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 1602.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #include <reg51.h>
   2          #define LCDIO P0
   3          sbit LCD1602_RS=P1^5;
   4          sbit LCD1602_RW=P1^4;
   5          sbit LCD1602_EN=P1^3;
   6          
   7          void LCD_delay(void)//使用延时函数代替busy check 该延时函数 使用for语句不能作为精确延时通用函数
   8          {
   9   1      unsigned char i;
  10   1      for(i=40;i>0;i--)
  11   1      ;
  12   1      }
  13          
  14          void LCD_en_command(unsigned char command)
  15          {
  16   1      LCDIO=command;
  17   1      LCD1602_RS=0;
  18   1      LCD1602_RW=0;
  19   1      LCD1602_EN=0;
  20   1      LCD_delay();
  21   1      LCD1602_EN=1;
  22   1      }
  23          
  24          
  25          void LCD_en_dat(unsigned char dat)
  26          {
  27   1      LCD1602_RS=1;
  28   1      LCD1602_RW=0;
  29   1      LCD1602_EN=0;
  30   1      LCD_delay();
  31   1      LCDIO=dat;
  32   1      LCD1602_EN=1;
  33   1      }
  34          
  35          
  36          void LCD_set_xy( unsigned char x, unsigned char y )
  37          {
  38   1      unsigned char address;
  39   1      if (y == 0)
  40   1      address = 0x80 + x;
  41   1      else
  42   1      address = 0xC0 + x;
  43   1      LCD_en_command(address);
  44   1      }
  45          
  46          
  47          void LCD_write_char( unsigned x,unsigned char y,unsigned char dat)
  48          {
  49   1      LCD_set_xy( x, y );
  50   1      LCD_en_dat(dat);
  51   1      }
  52          
  53          
  54          void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s)
  55          {
C51 COMPILER V7.06   1602                                                                  11/17/2007 00:19:47 PAGE 2   

  56   1      LCD_set_xy( X, Y );
  57   1      while (*s)
  58   1      {
  59   2      LCDIO=*s;
  60   2      LCD_en_dat(*s);
  61   2      s ++;
  62   2      }
  63   1      }
  64          
  65          
  66          void delay_nms(unsigned int n)//长延时函数，同样不能作为精确延时的用函数
  67          {
  68   1      unsigned int i=0,j=0;
  69   1      for (i=n;i>0;i--)
  70   1      for (j=0;j<1140;j++);
  71   1      }
  72          
  73          
  74          void LCD_init(void)//初始化函数 具体见 hd44780的命令详解
  75          {
  76   1      LCD_en_command(0x01);
  77   1      delay_nms(5);
  78   1      LCD_en_command(0x38);
  79   1      delay_nms(5);
  80   1      LCD_en_command(0x38);
  81   1      delay_nms(5);
  82   1      LCD_en_command(0x38);
  83   1      delay_nms(5);
  84   1      LCD_en_command(0xC0);
  85   1      delay_nms(5);
  86   1      LCD_en_command(0x80);
  87   1      delay_nms(5);
  88   1      LCD_en_command(0x01);
  89   1      delay_nms(5);
  90   1      }
  91          
  92          
  93          void main(void)
  94          {
  95   1      LCD_init();
  96   1      while(1)
  97   1      {
  98   2      //CLEARSCREEN;
  99   2      delay_nms(2);
 100   2      LCD_write_string(0,0," bg8wj");
 101   2      LCD_write_string(0,1," cdrom contral ");
 102   2      }
 103   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    208    ----
   CONSTANT SIZE    =     23    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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