pinlvji.rar_频率计 51

/************************************************************************** THE 1602 CHAR LCD LIB COPYRIGHT (c) 2005 BY JJJ. -- ALL RIGHTS RESERVED -- File Name: LCD.h Author: Jiang Jian Jun Created: 2005/4/3 Modified: NO Revision: 1.0 ***************************************************************************/ #ifndef LCD_CHAR_1602_2005_4_9 #define LCD_CHAR_1602_2005_4_9 #include <reg52.h> #include <intrins.h> #include "LCD1602.h" //Port Definitions********************************************************** sbit LcdRs = P2^0; sbit LcdRw = P2^1; sbit LcdEn = P2^2; sfr DBPort = 0x90; //P0=0x80,P1=0x90,P2=0xA0,P3=0xB0.数据端口 //内部等待函数************************************************************************** unsigned char LCD_Wait(void) { LcdRs=0; LcdRw=1; _nop_(); LcdEn=1; _nop_(); while(DBPort&0x80);//在用Proteus仿真时，注意用屏蔽此语句，在调用GotoXY()时， 会进入死循环， //可能在写该控制字时，该模块没有返回写入完备命令，即DBPort&0x80==0x80 //实际硬件时打开此语句 LcdEn=0; return DBPort; } //向LCD写入命令或数据************************************************************ #define LCD_COMMAND 0 // Command #define LCD_DATA 1 // Data #define LCD_CLEAR_SCREEN 0x01 // 清屏 #define LCD_HOMING 0x02 // 光标返回原点 void LCD_Write(bit style, unsigned char input) { LcdEn=0; LcdRs=style; LcdRw=0; _nop_(); DBPort=input; _nop_();//注意顺序 LcdEn=1; _nop_();//注意顺序 LcdEn=0; _nop_(); LCD_Wait(); } //设置显示模式************************************************************ #define LCD_SHOW 0x04 //显示开 #define LCD_HIDE 0x00 //显示关 #define LCD_CURSOR 0x02 //显示光标 #define LCD_NO_CURSOR 0x00 //无光标 #define LCD_FLASH 0x01 //光标闪动 #define LCD_NO_FLASH 0x00 //光标不闪动 void LCD_SetDisplay(unsigned char DisplayMode) { LCD_Write(LCD_COMMAND, 0x08|DisplayMode); } //设置输入模式************************************************************ #define LCD_AC_UP 0x02 #define LCD_AC_DOWN 0x00 // default #define LCD_MOVE 0x01 // 画面可平移 #define LCD_NO_MOVE 0x00 //default void LCD_SetInput(unsigned char InputMode) { LCD_Write(LCD_COMMAND, 0x04|InputMode); } //移动光标或屏幕************************************************************ /* #define LCD_CURSOR 0x02 #define LCD_SCREEN 0x08 #define LCD_LEFT 0x00 #define LCD_RIGHT 0x04 void LCD_Move(unsigned char object, unsigned char direction) { if(object==LCD_CURSOR) LCD_Write(LCD_COMMAND,0x10|direction); if(object==LCD_SCREEN) LCD_Write(LCD_COMMAND,0x18|direction); } */ //初始化LCD************************************************************ void LCD_Initial() { LcdEn=0; LCD_Write(LCD_COMMAND,0x38); //8位数据端口,2行显示,5*7点阵 LCD_Write(LCD_COMMAND,0x38); LCD_SetDisplay(LCD_SHOW|LCD_NO_CURSOR); //开启显示, 无光标 LCD_Write(LCD_COMMAND,LCD_CLEAR_SCREEN); //清屏 LCD_SetInput(LCD_AC_UP|LCD_NO_MOVE); //AC递增, 画面不动 } //********写LCD位置************************************************ void GotoXY(unsigned char x, unsigned char y) { if(y==0) LCD_Write(LCD_COMMAND,0x80|x); if(y==1) LCD_Write(LCD_COMMAND,0x80|(x-0x40)); } void Print(unsigned char *str) //写LCD { while(*str!='\0') { LCD_Write(LCD_DATA,*str); str++; } } /* void LCD_LoadChar(unsigned char user[8], unsigned char place) { unsigned char i; LCD_Write(LCD_COMMAND,0x40|(place*8)); for(i=0; i<8; i++) LCD_Write(LCD_DATA,user[i]); } */ //************************************************************************ #endif