main.lst

at89c51 操作 1602 LCD 的 C源代码

C51 COMPILER V7.06   MAIN                                                                  06/19/2008 20:36:11 PAGE 1   


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

stmt level    source

   1          #define LCM_RW P2_0 //定义引脚
   2          #define LCM_RS P2_1
   3          #define LCM_E P2_2
   4          #define LCM_Data P1
   5          #define Busy 0x80 //用于检测LCM 状态字中的Busy 标识
   6          #include <at89x51.h>
   7          void WriteDataLCM(unsigned char WDLCM);
   8          void WriteCommandLCM(unsigned char WCLCM,BuysC);
   9          unsigned char ReadDataLCM(void);
  10          unsigned char ReadStatusLCM(void);
  11          void LCMInit(void);
  12          void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
  13          void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
  14          void Delay5Ms(void);
  15          void Delay400Ms(void);
  16          unsigned char code cdle_net[] = {"www.cdle.net"};
  17          unsigned char code email[] = {"[e-mail]"};
  18          void main(void)
  19          {
  20   1      Delay400Ms(); //启动等待，等LCM 讲入工作状态
  21   1      LCMInit(); //LCM 初始化
  22   1      Delay5Ms(); //延时片刻(可不要)
  23   1      DisplayListChar(0, 0, cdle_net);
  24   1      DisplayListChar(0, 1, email);
  25   1      ReadDataLCM();//测试用句无意义
  26   1      while(1);
  27   1      }
  28          //写数据
  29          void WriteDataLCM(unsigned char WDLCM)
  30          {
  31   1      ReadStatusLCM(); //检测忙
  32   1      LCM_Data = WDLCM;
  33   1      LCM_RS = 1;
  34   1      LCM_RW = 0;
  35   1      LCM_E = 0; //若晶振速度太高可以在这后加小的延时
  36   1      LCM_E = 0; //延时
  37   1      LCM_E = 1;
  38   1      }
  39          //写指令
  40          void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC 为0 时忽略忙检测
  41          {
  42   1      if (BuysC) ReadStatusLCM(); //根据需要检测忙
  43   1      LCM_Data = WCLCM;
  44   1      LCM_RS = 0;
  45   1      LCM_RW = 0;
  46   1      LCM_E = 0;
  47   1      LCM_E = 0;
  48   1      LCM_E = 1;
  49   1      }
  50          //读数据
  51          unsigned char ReadDataLCM(void)
  52          {
  53   1      LCM_RS = 1;
  54   1      LCM_RW = 1;
  55   1      LCM_E = 0;
C51 COMPILER V7.06   MAIN                                                                  06/19/2008 20:36:11 PAGE 2   

  56   1      LCM_E = 0;
  57   1      LCM_E = 1;
  58   1      return(LCM_Data);
  59   1      }
  60          //读状态
  61          unsigned char ReadStatusLCM(void)
  62          {
  63   1      LCM_Data = 0xFF;
  64   1      LCM_RS = 0;
  65   1      LCM_RW = 1;
  66   1      LCM_E = 0;
  67   1      LCM_E = 0;
  68   1      LCM_E = 1;
  69   1      while (LCM_Data & Busy); //检测忙信号
  70   1      return(LCM_Data);
  71   1      }
  72          void LCMInit(void) //LCM 初始化
  73          {
  74   1      LCM_Data = 0;
  75   1      WriteCommandLCM(0x38,0); //三次显示模式设置，不检测忙信号
  76   1      Delay5Ms();
  77   1      WriteCommandLCM(0x38,0);
  78   1      Delay5Ms();
  79   1      WriteCommandLCM(0x38,0);
  80   1      Delay5Ms();
  81   1      WriteCommandLCM(0x38,1); //显示模式设置,开始要求每次检测忙信号
  82   1      WriteCommandLCM(0x08,1); //关闭显示
  83   1      WriteCommandLCM(0x01,1); //显示清屏
  84   1      WriteCommandLCM(0x06,1); // 显示光标移动设置
  85   1      WriteCommandLCM(0x0C,1); // 显示开及光标设置
  86   1      }
  87          //按指定位置显示一个字符
  88          void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
  89          {
  90   1      Y &= 0x1;
  91   1      X &= 0xF; //限制X 不能大于15，Y 不能大于1
  92   1      if (Y) X |= 0x40; //当要显示第二行时地址码+0x40;
  93   1      X |= 0x80; //算出指令码
  94   1      WriteCommandLCM(X, 0); //这里不检测忙信号，发送地址码
  95   1      WriteDataLCM(DData);
  96   1      }
  97          //按指定位置显示一串字符
  98          void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
  99          {
 100   1      unsigned char ListLength;
 101   1      ListLength = 0;
 102   1      Y &= 0x1;
 103   1      X &= 0xF; //限制X 不能大于15，Y 不能大于1
 104   1      while (DData[ListLength]>0x20) //若到达字串尾则退出
 105   1      {
 106   2      if (X <= 0xF) //X 坐标应小于0xF
 107   2      {
 108   3      DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符
 109   3      ListLength++;
 110   3      X++;
 111   3      }
 112   2      }
 113   1      }
 114          //5ms 延时
 115          void Delay5Ms(void)
 116          {
 117   1      unsigned int TempCyc = 5552;
C51 COMPILER V7.06   MAIN                                                                  06/19/2008 20:36:11 PAGE 3   

 118   1      while(TempCyc--);
 119   1      }
 120          //400ms 延时
 121          void Delay400Ms(void)
 122          {
 123   1      unsigned char TempCycA = 5;
 124   1      unsigned int TempCycB;
 125   1      while(TempCycA--)
 126   1      {
 127   2      TempCycB=7269;
 128   2      while(TempCycB--);
 129   2      };
 130   1      }
 131          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    312    ----
   CONSTANT SIZE    =     29    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       8
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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