C51 COMPILER V9.01   LCD                                                                   06/04/2021 20:46:20 PAGE 1   


C51 COMPILER V9.01, COMPILATION OF MODULE LCD
OBJECT MODULE PLACED IN lcd.OBJ
COMPILER INVOKED BY: D:\Program Files (x86)\Keil_v4\C51\BIN\C51.EXE lcd.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1           
   2          /*
   3                  FileName        : lcd.c
   4                  Author          : Tkz
   5                  Date            : 2021.02.5
   6          */
   7          
   8          #include "lcd.h"
   9          
  10          void ReadBusy(void)           //忙检测函数，判断bit7是0，允许执行；1禁止
  11          {
  12   1          unsigned char statu;      //
  13   1          LCD1602_DATAPINS = 0xff;
  14   1          LCD1602_RS = 0;
  15   1          LCD1602_RW = 1;
  16   1          do
  17   1          {
  18   2              LCD1602_EN = 1;
  19   2              statu = LCD1602_DATAPINS;
  20   2              LCD1602_EN = 0;    //使能，用完就拉低，释放总线
  21   2          }while(statu & 0x80);
  22   1      }
  23          
  24          void Lcd1602_Delay1ms(unsigned int c)   //误差 0us
  25          {
  26   1          unsigned char a,b;
  27   1              for (; c>0; c--)
  28   1              {
  29   2                       for (b=199;b>0;b--)
  30   2                       {
  31   3                              for(a=1;a>0;a--);
  32   3                       }      
  33   2              }       
  34   1      }
  35          
  36          /* LCD1602写入命令 */
  37          void LcdWriteCom(unsigned char com)       //写入命令
  38          {
  39   1              ReadBusy();
  40   1              LCD1602_EN = 0;     //使能
  41   1              LCD1602_RS = 0;    //选择写入命令 数据/命令选择端(H/L) 1/0
  42   1              LCD1602_RW = 0;    //选择写入 读/写选择端(H\L)     1/0
  43   1              
  44   1              LCD1602_DATAPINS = com;     //放入命令
  45   1              Lcd1602_Delay1ms(1);            //等待数据稳定
  46   1      
  47   1              LCD1602_EN = 1;           //写入时序
  48   1              Lcd1602_Delay1ms(5);      //保持时间
  49   1              LCD1602_EN = 0;
  50   1      }
  51          
  52          /* LCD1602写入数据 */                              
  53          void LcdWriteData(unsigned char dat)                    //写入数据
  54          {
  55   1              ReadBusy();
C51 COMPILER V9.01   LCD                                                                   06/04/2021 20:46:20 PAGE 2   

  56   1              LCD1602_EN = 0; //使能清零
  57   1              LCD1602_RS = 1; //选择输入数据
  58   1              LCD1602_RW = 0; //选择写入
  59   1      
  60   1              LCD1602_DATAPINS = dat; //写入数据
  61   1              Lcd1602_Delay1ms(1);
  62   1      
  63   1              LCD1602_EN = 1;   //写入时序
  64   1              Lcd1602_Delay1ms(5);   //保持时间
  65   1              LCD1602_EN = 0;
  66   1      }
  67          void delay_ms(unsigned char ms);
  68          /* LCD1602初始化 */        
  69          void Lcd1602Init(void)                                            //LCD初始化子程序
  70          {
  71   1              LcdWriteCom(0x38);  //开显示 5*8,8位数据
  72   1              LcdWriteCom(0x0c);  //开显示不显示光标
  73   1              //LcdWriteCom(0x0f); // 显示光标并闪烁
  74   1              LcdWriteCom(0x06);  //写一个指针加1
  75   1              LcdWriteCom(0x01);  //清屏
  76   1              LcdWriteCom(0x80);  //设置数据指针起点
  77   1      
  78   1              //LcdWriteCom(0x80);
  79   1              LcdWriteStr(" Welcome To Use ");
  80   1              LcdWriteCom(0x80+0x40);
  81   1              LcdWriteStr("Electronic Scale");
  82   1      }
  83          
  84          
  85          
  86          /* 按指定位置显示字符串 */
  87          void LcdWriteStr(unsigned char * str){
  88   1              while(*str != '\0'){
  89   2                      LcdWriteData(*str++);
  90   2              }       
  91   1      }
  92          
  93          
  94          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    175    ----
   CONSTANT SIZE    =     34    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       3
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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