lcd1602.lst

2.4tft彩屏教程

C51 COMPILER V7.06   LCD1602                                                               06/19/2009 10:01:56 PAGE 1   


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

stmt level    source

   1          
   2          /*1-VSS 2-VDD 3-V0 4-RS 5-R/W 6-E
   3           *7-14 DB0-DB7 15-BLA 16-BLK
   4           */
   5          
   6          /*copyright 2007,ShangHai  HaoTun Electronic Technology co.,Ltd
   7           *
   8           *This sample is used for lcm1602 .
   9           *
  10           *write by Shifang 2007-8-11
  11           *
  12           *V1.1
  13           */
  14          #include<reg52.h>
  15          #include<stdio.h>
  16          #include<intrins.h>
  17          
  18          
  19          unsigned int hour,minute,second,count;
  20          
  21          sbit RS = P2^4;//Pin4
  22          sbit RW = P2^5; //Pin5
  23          sbit E  = P2^6;//Pin6
  24          
  25          #define Data  P0    //数据端口
  26          
  27          extern unsigned int l_tmpdate[7];
  28          
  29          char data TimeNum[]="                ";
  30          char data Test1[]="                  ";
  31          /******************************************************************/
  32          /*                    函数声明                                    */
  33          /******************************************************************//*************************************
             -**************************/
  34          void DelayUs(unsigned char us)//delay us
  35          {
  36   1       unsigned char uscnt;
  37   1       uscnt=us>>1;/* Crystal frequency in 12MHz*/
  38   1       while(--uscnt);
  39   1      }
  40          /******************************************************************/
  41          void DelayMs(unsigned char ms)//delay Ms
  42          {
  43   1       while(--ms)
  44   1         {
  45   2           DelayUs(250);
  46   2           DelayUs(250);
  47   2               DelayUs(250);
  48   2               DelayUs(250);
  49   2         }
  50   1      }
  51          void WriteCommand(unsigned char c)
  52          {
  53   1       DelayMs(5);//short delay before operation
  54   1       E=0;
C51 COMPILER V7.06   LCD1602                                                               06/19/2009 10:01:56 PAGE 2   

  55   1       RS=0;
  56   1       RW=0;
  57   1       _nop_();
  58   1       E=1;
  59   1       Data=c;
  60   1       E=0;
  61   1      }
  62          /****************************************************************/
  63          void WriteData(unsigned char c)
  64          {
  65   1       DelayMs(5);   //short delay before operation
  66   1       E=0;
  67   1       RS=1;
  68   1       RW=0;
  69   1       _nop_();
  70   1       E=1;
  71   1       Data=c;
  72   1       E=0;
  73   1       RS=0;
  74   1      }
  75          /*********************************************************************/
  76          void ShowChar(unsigned char pos,unsigned char c)
  77          {
  78   1       unsigned char p;
  79   1       if (pos>=0x10)
  80   1          p=pos+0xb0; //是第二行则命令代码高4位为0xc
  81   1       else 
  82   1          p=pos+0x80; //是第二行则命令代码高4位为0x8
  83   1       WriteCommand (p);//write command
  84   1       WriteData (c);   //write data
  85   1      }
  86          /*************************************************************************/
  87          void ShowString (unsigned char line,char *ptr)
  88          {
  89   1       unsigned char l,i;
  90   1       l=line<<4;
  91   1       for (i=0;i<16;i++)
  92   1        ShowChar (l++,*(ptr+i));//循环显示16个字符
  93   1      }
  94          /*********************************************************************/
  95          void InitLcd()
  96          {
  97   1       DelayMs(15);
  98   1       WriteCommand(0x38); //display mode
  99   1       WriteCommand(0x38); //display mode
 100   1       WriteCommand(0x38); //display mode
 101   1       WriteCommand(0x06); //显示光标移动位置
 102   1       WriteCommand(0x0c); //显示开及光标设置
 103   1       WriteCommand(0x01); //显示清屏
 104   1      
 105   1      }
 106          
 107          
 108          /////////////////////////////////////////////////////////////////
 109          void disp(void)
 110          
 111          {
 112   1      
 113   1      
 114   1      sprintf(Test1," 20%02d-%d-%2d  ^%1d^   ",l_tmpdate[6],l_tmpdate[4],l_tmpdate[3],l_tmpdate[5]);//the first 
             -line
 115   1      ShowString(0,Test1);
C51 COMPILER V7.06   LCD1602                                                               06/19/2009 10:01:56 PAGE 3   

 116   1      
 117   1      sprintf(TimeNum,"    %02d:%02d:%02d     ",l_tmpdate[2],l_tmpdate[1],l_tmpdate[0]);//the first line
 118   1      ShowString(1,TimeNum);
 119   1      
 120   1      
 121   1      
 122   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    285    ----
   CONSTANT SIZE    =     49    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =     44       5
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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