1602.lst

字符型液晶1602的应用

C51 COMPILER V7.06   1602                                                                  04/23/2007 21:03:48 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE 1602
OBJECT MODULE PLACED IN 1602.OBJ
COMPILER INVOKED BY: D:\keil\C51\BIN\C51.EXE 1602.c BROWSE DEBUG OBJECTEXTEND TABS(2)

stmt level    source

   1          /******************************************
   2          程序功能：熟悉并使用液晶1602显示我们需要的字符
   3                    这里我们要显示的是"Fuzhou university"
   4          *******************************************/
   5          
   6          #define LCM_RW  P0_4 //定义引脚 
   7          #define LCM_RS  P0_5 
   8          #define LCM_E   P0_3
   9          #define LCM_Data  P2 
  10          #define Busy    0x80 //用于检测LCM状态字中的Busy标识 
  11          
  12          #include <AT89X52.H>
  13          
  14          void WriteDataLCM(unsigned char WDLCM); 
  15          void WriteCommandLCM(unsigned char WCLCM,BuysC); 
  16          unsigned char ReadDataLCM(void); 
  17          unsigned char ReadStatusLCM(void); 
  18          void LCMInit(void); 
  19          void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData); 
  20          void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData); 
  21          void Delay5Ms(void); 
  22          void Delay400Ms(void); 
  23          
  24          unsigned char code net[] = {"Fuzhou"}; 
  25          unsigned char code uctech[] = {"university"}; 
  26          
  27          
  28          void main(void) 
  29          { 
  30   1       Delay400Ms(); //启动等待，等LCM讲入工作状态 
  31   1       LCMInit(); //LCM初始化 
  32   1       Delay5Ms(); //延时片刻(可不要) 
  33   1      
  34   1       DisplayListChar(0, 5, uctech); 
  35   1       DisplayListChar(0, 0, net); 
  36   1       ReadDataLCM();//测试用句无意义 
  37   1       while(1); 
  38   1      } 
  39          
  40          //写数据 
  41          void WriteDataLCM(unsigned char WDLCM) 
  42          { 
  43   1       ReadStatusLCM(); //检测忙 
  44   1       LCM_Data = WDLCM; 
  45   1       LCM_RS = 1; 
  46   1       LCM_RW = 0; 
  47   1       LCM_E = 0; //若晶振速度太高可以在这后加小的延时 
  48   1       LCM_E = 0; //延时 
  49   1       LCM_E = 1; 
  50   1      } 
  51          
  52          //写指令 
  53          void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC为0时忽略忙检测 
  54          { 
  55   1       if (BuysC) ReadStatusLCM(); //根据需要检测忙 
C51 COMPILER V7.06   1602                                                                  04/23/2007 21:03:48 PAGE 2   

  56   1       LCM_Data = WCLCM; 
  57   1       LCM_RS = 0; 
  58   1       LCM_RW = 0;  
  59   1       LCM_E = 0; 
  60   1       LCM_E = 0; 
  61   1       LCM_E = 1;  
  62   1      } 
  63          
  64          //读数据 
  65          unsigned char ReadDataLCM(void) 
  66          { 
  67   1       LCM_RS = 1;  
  68   1       LCM_RW = 1; 
  69   1       LCM_E = 0; 
  70   1       LCM_E = 0; 
  71   1       LCM_E = 1; 
  72   1       return(LCM_Data); 
  73   1      } 
  74          
  75          //读状态 
  76          unsigned char ReadStatusLCM(void) 
  77          { 
  78   1       LCM_Data = 0xFF;  
  79   1       LCM_RS = 0; 
  80   1       LCM_RW = 1; 
  81   1       LCM_E = 0; 
  82   1       LCM_E = 0; 
  83   1       LCM_E = 1; 
  84   1       while (LCM_Data & Busy); //检测忙信号 
  85   1       return(LCM_Data); 
  86   1      } 
  87          
  88          
  89          //LCM初始化
  90          void LCMInit(void) //LCM初始化 
  91          { 
  92   1       LCM_Data = 0; 
  93   1       WriteCommandLCM(0x38,0); //三次显示模式设置，不检测忙信号 
  94   1       Delay5Ms();  
  95   1       WriteCommandLCM(0x38,0); 
  96   1       Delay5Ms();  
  97   1       WriteCommandLCM(0x38,0); 
  98   1       Delay5Ms();  
  99   1      
 100   1       WriteCommandLCM(0x38,1); //显示模式设置,开始要求每次检测忙信号 
 101   1       WriteCommandLCM(0x08,1); //关闭显示 
 102   1       WriteCommandLCM(0x01,1); //显示清屏 
 103   1       WriteCommandLCM(0x06,1); // 显示光标移动设置 
 104   1       WriteCommandLCM(0x0C,1); // 显示开及光标设置 
 105   1      } 
 106          
 107          //按指定位置显示一个字符 
 108          void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData) 
 109          { 
 110   1       Y &= 0x1; 
 111   1       X &= 0xF; //限制X不能大于15，Y不能大于1 
 112   1       if (Y) X |= 0x40; //当要显示第二行时地址码+0x40; 
 113   1       X |= 0x80; // 算出指令码 
 114   1       WriteCommandLCM(X, 0); //这里不检测忙信号，发送地址码 
 115   1       WriteDataLCM(DData); 
 116   1      } 
 117          
C51 COMPILER V7.06   1602                                                                  04/23/2007 21:03:48 PAGE 3   

 118          //按指定位置显示一串字符 
 119          void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData) 
 120          { 
 121   1       unsigned char ListLength; 
 122   1      
 123   1        ListLength = 0; 
 124   1       Y &= 0x1; 
 125   1       X &= 0xF; //限制X不能大于15，Y不能大于1 
 126   1       while (DData[ListLength]>0x20) //若到达字串尾则退出 
 127   1        { 
 128   2         if (X <= 0xF) //X坐标应小于0xF 
 129   2          { 
 130   3           DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符 
 131   3           ListLength++; 
 132   3           X++; 
 133   3          } 
 134   2        } 
 135   1      } 
 136          //5ms延时 
 137          void Delay5Ms(void) 
 138          { 
 139   1       unsigned int TempCyc = 5552; 
 140   1       while(TempCyc--); 
 141   1      } 
 142          
 143          //400ms延时 
 144          void Delay400Ms(void) 
 145          { 
 146   1       unsigned char TempCycA = 5; 
 147   1       unsigned int TempCycB; 
 148   1       while(TempCycA--) 
 149   1       { 
 150   2        TempCycB=7269; 
 151   2        while(TempCycB--); 
 152   2       }; 
 153   1      } 
 154          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    312    ----
   CONSTANT SIZE    =     18    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       8
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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