C51 COMPILER V7.06   LCD1602                                                               09/01/2008 00:04:39 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE LCD1602
OBJECT MODULE PLACED IN lcd1602.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE lcd1602.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          //#pragma src // 產生匯編文件
   2          #include<reg51.h>
   3          #include<intrins.h>
   4          //========= 變量類型標識的宏定義,通常做法 ==============
   5          #define Uchar unsigned char
   6          #define Uint unsigned int
   7          //========  定義LCD與MCU的接口，LCD數據線接P2 =============
   8          #define LCD_DATA P0
   9          sbit LCD_EN=P3^5;
  10          sbit LCD_RS=P3^7;
  11          sbit LCD_RW=P3^6;
  12          
  13          /*------------------------------------------------
  14          Public function prototypes  函數原型
  15          -------------------------------------------------*/
  16          void LCD_init(void);/*初始化*/
  17          void LCD_cmd(Uchar cmd);/*寫入控制命令*/
  18          void LCD_string(char *s);/*寫入要顯示的字符串*/
  19          void LCD_char(char str);/*寫入要顯示的字符*/
  20          void LCD_setxy(char x,char y);/*設定顯示位置，行x=1/2,列y=1~16的任意整數*/
  21          void wait_until_ready(void);/*檢測忙標志，忙則等待*/
  22          void delay(void);
  23          
  24          //函數實現：
  25          
  26          
  27          sbit bflag=ACC^7;
  28          void delay(void)                 //延時函數
  29            {
  30   1      
  31   1      
  32   1        int i=0;
  33   1      
  34   1         
  35   1        }
  36          /*產生一個使能脈沖*/
  37          void En_Toggle(void)
  38          {
  39   1       LCD_EN=1;
  40   1              delay();
  41   1       LCD_EN=0;
  42   1              delay();
  43   1      }
  44          
  45          
  46          void LCD_clr()
  47          {
  48   1      LCD_cmd(0x01);
  49   1      
  50   1      }
  51          
  52          void LCD_init(void)
  53          {
  54   1         LCD_cmd(0x08);/*顯示關閉*/
  55   1         LCD_cmd(0x38);/*8位數據，2行顯示*/
C51 COMPILER V7.06   LCD1602                                                               09/01/2008 00:04:39 PAGE 2   

  56   1      
  57   1         LCD_cmd(0x01);/*清屏*/ 
  58   1          /*清屏和光標歸位需要較長的時間*/
  59   1         LCD_cmd(0x06);/*寫入數據后光標右移*/
  60   1         LCD_cmd(0x0c);/*顯示開，不顯示光標*/
  61   1      }
  62          void LCD_cmd(Uchar cmd)/*寫入控制命令*/
  63          {
  64   1         wait_until_ready();
  65   1         LCD_RS=0;
  66   1         LCD_RW=0;
  67   1         LCD_DATA=cmd;
  68   1         En_Toggle();
  69   1      
  70   1      }
  71          void LCD_char(char str)/*寫入要顯示的字符*/
  72          {
  73   1         wait_until_ready();
  74   1         LCD_RS=1;
  75   1         LCD_RW=0;
  76   1         LCD_DATA=str;
  77   1         En_Toggle();
  78   1                                     
  79   1      }
  80          void LCD_setxy(char x,char y) /*設定顯示位置，行x=1/2,列y=1~16的任意整數*/
  81          {
  82   1          char temp;
  83   1          if(x==1)
  84   1        {temp=0x80+y-1;
  85   2        LCD_cmd(temp);
  86   2        }
  87   1       else
  88   1        {temp=0xC0+y-1;
  89   2        LCD_cmd(temp);
  90   2        }
  91   1      }
  92          void LCD_string(char *s)
  93          {
  94   1       for(;*s!='\0';s++)LCD_char(*s);
  95   1      }
  96          void wait_until_ready(void) /*檢測忙標志，忙則等待*/
  97          {
  98   1         LCD_RS=0;
  99   1         LCD_RW=1;
 100   1         LCD_DATA=0x0ff;
 101   1         LCD_EN=1;
 102   1         delay();
 103   1         do{ACC=LCD_DATA;}while(bflag==1);
 104   1         LCD_EN=0;
 105   1      }
 106          
 107          
 108          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    151    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       9
   IDATA SIZE       =   ----    ----
C51 COMPILER V7.06   LCD1602                                                               09/01/2008 00:04:39 PAGE 3   

   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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