1602驱动程序.txt

单片机1602LCD和4X4键盘相关c语言程序,共五个(驱动程序,字符串程序等)

/**************************************************************************
  
                                   
                                 1602LCD 驱动程序
  
***************************************************************************/

#ifndef LCD_CHAR_1602_2005_4_9
#define LCD_CHAR_1602_2005_4_9
#include <regx52.h>

#include <intrins.h>

//Port Definitions**********************************************************
sbit LcdRs  = p3^7;
sbit LcdRw  = P3^6;
sbit LcdEn  = P2^6;
sfr  DBPort         = 0x80;                //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文明用语时，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
}

//************************************************************************
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)
{
        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);
}
*/
//************************************************************************
#endif