51单片机实验17：LCD1602液晶

开发板液晶模块电路图如下：

#include<reg52.h>
#include<lcd.h>

uc dig1[]=" Happy New Year ";
uc dig2[]=" Ha  Ha  Ha  Ha ";

void main()
{
    uc i;
    lcdinit();
    lcdwritecom(0x80);
    for(i=1;i<=16;i++)
    {
        lcdwritedata(dig1[i-1]);
    }
    lcdwritecom(0xc0);
    for(i=1;i<=16;i++)
    {
        lcdwritedata(dig2[i-1]);
    }
    while(1);
}

#include<lcd.h>

void delay()   //延时500微秒
{
    uc a,b;
    for(b=99;b>0;b--)
        for(a=1;a>0;a--);
}

#ifndef lcd4pins
void lcdwritecom(uc com)
{
    lcd_e=0;
    lcd_rs=0;
    lcd_rw=0;
    lcd_data=com;
    delay();
    lcd_e=1;
    delay();
    lcd_e=0;
}
#else
void lcdwritecom(uc com)
{
    lcd_e=0;
    lcd_rs=0;
    lcd_rw=0;
    lcd_data=com;
    delay();
    lcd_e=1;
    delay();
    lcd_e=0;
    lcd_data=com<<4;
    delay();
    lcd_e=1;
    delay();
    lcd_e=0;
}
#endif

#ifndef lcd4pins
void lcdwritedata(uc dat)
{
    lcd_e=0;
    lcd_rs=1;
    lcd_rw=0;
    lcd_data=dat;
    delay();
    lcd_e=1;
    delay();
    lcd_e=0;
}
#else
void lcdwritedata(uc dat)
{
    lcd_e=0;
    lcd_rs=1;
    lcd_rw=0;
    lcd_data=dat;
    delay();
    lcd_e=1;
    delay();
    lcd_e=0;
    lcd_data=dat<<4;
    delay();
    lcd_e=1;
    delay();
    lcd_e=0;
}
#endif

#ifndef lcd4pins
void lcdinit()
{
    lcdwritecom(0x01);
    lcdwritecom(0x06);
    lcdwritecom(0x0c);
    lcdwritecom(0x38);
}
#else
void lcdinit()
{
    lcdwritecom(0x32);
    lcdwritecom(0x28);
    lcdwritecom(0x01);
    lcdwritecom(0x06);
    lcdwritecom(0x0c);
}
#endif

#ifndef _LCD_H_
#define _LCD_H_

#include<reg52.h>

#ifndef uc
#define uc unsigned char
#endif
#ifndef ui
#define ui unsigned int
#endif

//#define lcd4pins   //4PIN输入时打开这个

#define lcd_data P0
sbit lcd_e=P2^7;
sbit lcd_rw=P2^5;
sbit lcd_rs=P2^6;

void delay();
void lcdwritecom(uc com);
void lcdwritedata(uc dat);
void lcdinit();


#endif