1602-1.lst

采用单片机+1602液晶模块进行控制简单显示。

C51 COMPILER V7.00  1602_1                                                                 05/18/2009 11:36:00 PAGE 1   


C51 COMPILER V7.00, COMPILATION OF MODULE 1602_1
OBJECT MODULE PLACED IN 1602-1.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 1602-1.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #include<reg52.h>
   2          #include<intrins.h>
   3          
   4          sbit RS = P2^2;
   5          sbit RW = P2^3; 
   6          sbit E  = P2^4;
   7          
   8          #define dataport  P0    
   9          #define busy  0x80  
  10                               
  11          //函数声明
  12          void init(void); //初始化函数
  13          void dellay(unsigned int); //延迟函数
  14          void display_char(unsigned char x,unsigned char y,unsigned char wdata); //显示单个字符函数
  15          void display_string(unsigned char x,unsigned char y,unsigned char code *str); //显示字符串函数
  16          void writecommand(unsigned char wcond); //写命令函数
  17          void writedata(unsigned char wdata); //写数据函数
  18          void display_xy(unsigned char x,unsigned char y); //光标定位函数
  19          void waitforenable(void); //等待检测函数
  20          unsigned char code first[] = {"www.xiyou.edu.cn"};
  21          unsigned char code second[] = {"guangdian zhaobo"};
  22           /*******************延迟函数*******************************/
  23          
  24          void dellay(unsigned int t)
  25          {
  26   1        while(t--);  
  27   1      }
  28          
  29          
  30          /************主程序**************/
  31          main()
  32          {
  33   1       dellay(400); 
  34   1       init();
  35   1      
  36   1       display_string(0,0,first); 
  37   1       display_string(0,1,second);  
  38   1       
  39   1       while(1);   
  40   1      } 
  41          
  42          /**************写数据函数************************************/
  43          
  44          void  writedata(unsigned char wdata)
  45          {
  46   1        waitforenable();
  47   1         RS=1;
  48   1         RW=0;
  49   1         E=0;
  50   1              _nop_(); //空操作为了保证顺利读取数据
  51   1              dataport=wdata;
  52   1         E=1;
  53   1              _nop_();
  54   1              E=0;
  55   1              RS=0;
C51 COMPILER V7.00  1602_1                                                                 05/18/2009 11:36:00 PAGE 2   

  56   1      }
  57          /***************写命令函数***********************************/
  58          
  59          void  writecommand(unsigned char wcond)
  60          {
  61   1         waitforenable();
  62   1         RS=0;
  63   1         RW=0;
  64   1              E=0;
  65   1         _nop_();
  66   1              dataport=wcond;
  67   1         E=1;
  68   1              _nop_();
  69   1               E=0;
  70   1      }
  71          
  72          /***********初始化**************************/
  73          void init(void)
  74          {
  75   1        writecommand(0x38);
  76   1        dellay(1000);
  77   1        writecommand(0x38); //显示模式设置
  78   1        writecommand(0x08); //关闭显示
  79   1        writecommand(0x06); //显示光标移动设置
  80   1        writecommand(0x0c); //显示开及光标移动设置
  81   1        writecommand(0x01); //显示清屏
  82   1      }
  83          /*****************光标定位函数*********************************/
  84          
  85          void display_xy(unsigned char x,unsigned char y)
  86          { 
  87   1       if(y==1)x+=0x40;
  88   1       x+=0x80;
  89   1       writecommand(x);
  90   1      }
  91          /*******************显示单个字符函数*************************************************/
  92          
  93          void display_char(unsigned char x,unsigned char y,unsigned char wdata)
  94          {
  95   1        display_xy(x,y);
  96   1        writedata(wdata);
  97   1      }
  98          
  99          /******************显示字符串函数************************************************************/
 100          void display_string(unsigned char x, unsigned char y, unsigned char code *str)
 101          
 102          {
 103   1        display_xy(x,y);
 104   1        while(*str)
 105   1        {
 106   2         writedata(*str);
 107   2         str++;
 108   2        }
 109   1      }
 110          /***********等待检测函数*************************/
 111          void waitforenable(void)
 112          {
 113   1      dataport=0xff;
 114   1      RS=0;
 115   1      RW=1;
 116   1      E=1;
 117   1      while(dataport & busy);
C51 COMPILER V7.00  1602_1                                                                 05/18/2009 11:36:00 PAGE 3   

 118   1      E=0;
 119   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    198    ----
   CONSTANT SIZE    =     34    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       5
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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