lcd.lst

c8051f020+ad9852＋12864＋键盘（频率合成）贝一特电子

C51 COMPILER V8.05a   LCD                                                                  01/11/2009 22:55:15 PAGE 1   


C51 COMPILER V8.05a, COMPILATION OF MODULE LCD
OBJECT MODULE PLACED IN lcd.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE lcd.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <main.h>
   2          
   3          /*
   4          
   5          LCD_
   6          RS  <P4.0>         
   7          WR  <P4.1>     
   8          E   <P4.2>
   9          要求:P4.0,4.1,4.2设置为推拉输出;  
  10          P5口设置为带弱上拉的漏极输出,3.3V电平标准即可
  11          
  12          */
  13          
  14          unsigned char code dig[]={"0123456789"};
  15          
  16          void lcd_delay()
  17          {       unsigned char delayTime;
  18   1              for(delayTime=100;delayTime>0;delayTime--);
  19   1      }
  20            
  21          /* 返回值Status:        当前地址计数器的值.     */
  22          unsigned char LCDBusyWait()                                                     //等待LCD就绪
  23          {
  24   1              unsigned char Status;
  25   1              P4&=0xfe;  //11111110,LCD_RS=0
  26   1          lcd_delay();
  27   1              
  28   1              P4|=0x02;//00000010,LCD_RW=1
  29   1          lcd_delay();  
  30   1              
  31   1              P5 = 0xFF;
  32   1              P4|=0x04;//00000100,LCD_E=1
  33   1      
  34   1              lcd_delay();   
  35   1              Status=P5;
  36   1              P4&=0xfB;//11111011,LCD_E=0
  37   1      
  38   1              while(Status & 0x80)
  39   1              {
  40   2              lcd_delay(); 
  41   2                      P4|=0x04;//00000100,LCD_E=1
  42   2              lcd_delay();  
  43   2                      Status=P5;
  44   2                      lcd_delay(); 
  45   2                      P4&=0xfB;//11111011,LCD_E=0
  46   2      
  47   2              }
  48   1              P4&=0xfd;//11111101,LCD_RW=0
  49   1      
  50   1              return Status;
  51   1      }
  52          
  53          void WriteLCD_Data(unsigned char Data)                  //向LCD写入一个字节的数据
  54          {
  55   1              LCDBusyWait();
C51 COMPILER V8.05a   LCD                                                                  01/11/2009 22:55:15 PAGE 2   

  56   1              P4|=0x01;//00000001,LCD_RW=0,LCD_RS=1
  57   1      
  58   1              lcd_delay();     
  59   1              P5 = Data;
  60   1              lcd_delay();
  61   1              P4|=0x04;//00000100,LCD_E=1
  62   1      
  63   1              lcd_delay();
  64   1              P4&=0xfB;//11111011,LCD_E=0
  65   1      
  66   1      }
  67          
  68          void WriteLCD_Command(unsigned char Command)    //向LCD写入一个字节的命令
  69          {
  70   1              LCDBusyWait();
  71   1              P4&=0xFE;//11111110,LCD_RS=0
  72   1      
  73   1              lcd_delay();
  74   1              P5 = Command;
  75   1              lcd_delay();
  76   1              P4|=0x04;//00000100,LCD_E=1
  77   1      
  78   1              lcd_delay();
  79   1              P4&=0xfB;//11111011,LCD_E=0
  80   1      
  81   1      }
  82          
  83          //改变地址,实现了逐行显示
  84          unsigned char ChangeAddress(unsigned char StartAddress)
  85          {
  86   1              switch(StartAddress)
  87   1              {
  88   2                      case 0x87:WriteLCD_Command(0x90);StartAddress=0x90;break;
  89   2                      case 0x8F:WriteLCD_Command(0x98);StartAddress=0x98;break;
  90   2                      case 0x97:WriteLCD_Command(0x88);StartAddress=0x88;break;
  91   2                      default:StartAddress+=1;
  92   2              }
  93   1              return StartAddress;
  94   1      }
  95          
  96          /*****************************显示字符串***************************************/
  97          
  98          void WriteLCD(unsigned char StartAddress,unsigned char Size,unsigned char Charactors[])
  99          {
 100   1              unsigned char *i=Charactors;      //字符串的首地址
 101   1              WriteLCD_Command(StartAddress);
 102   1              if(Size)                //Size不为0
 103   1              {
 104   2              //      bit Over=0;
 105   2                      while(i<(Charactors+Size))              //判断字符串结尾
 106   2                      {
 107   3      
 108   3                              WriteLCD_Data(*i);
 109   3                              i++;
 110   3                              //WriteLCD_Data(*i);
 111   3                              //i++;
 112   3                              StartAddress=ChangeAddress(StartAddress); //改变地址,实现了逐行显示
 113   3                      }
 114   2              }
 115   1              else                    //Size为0
 116   1              {
 117   2                      while(*i)                                               //判断字符串结尾,*i为0代表结束
C51 COMPILER V8.05a   LCD                                                                  01/11/2009 22:55:15 PAGE 3   

 118   2                      {
 119   3                              WriteLCD_Data(*i);
 120   3                              i++;
 121   3                              WriteLCD_Data(*i);
 122   3                              i++;
 123   3                              StartAddress=ChangeAddress(StartAddress);
 124   3                      }
 125   2              }
 126   1      }
 127          /****************************显示数字********************************/
 128          
 129          void Show_num(unsigned char address,unsigned int num)
 130          {
 131   1       unsigned char k,j,i=0;
 132   1       unsigned char w_data[10];
 133   1       WriteLCD_Command(address); 
 134   1       //WriteLCD(0x90,0,"     ");
 135   1       do
 136   1         {
 137   2          w_data[i++]=num%10;
 138   2              num=num/10;
 139   2              j=i;
 140   2         }while(num!=0);
 141   1           
 142   1              for(k=j;k>0;k--)
 143   1              {       
 144   2                      WriteLCD_Data(dig[w_data[k-1]]);
 145   2              }
 146   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    332    ----
   CONSTANT SIZE    =     11    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----      18
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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