AVR单片机4bit字符LCD1602显示

main.c文件里面

#include<iom16v.h>
#include"LCD4BIT.h"
unsigned char str1[] = "0123456789ABCDEF" ;
unsigned char str2[] = "I LOVE AVR MCU!!";
void main (void)
{unsigned char i ;
DDRC=0xff;
LCD init() ;
while (1)
{
LCD_display_String(0,0,str1) ;
LCD_display_String(l,0, str2) ;
}
}

LCD4BIT_DRIVER.C文件

#include "LCD4BIT.h"
void LCD_sent_cmd (char cmd)
{
LCD_PORT = (cmd&0xF0) | LCD_EN;
LCD_PORT = cmd&0xF0;
LCD_PORT = ( (cmd<<4) &0xF0) |LCD_EN;
LCD_PORT =(cmd<<4) δ0xF0;
delayms (3) ;
}

void LCD_sent_data (unsigned char dat)
{
LCD_PORT = ((dat&0xF0) |LCD_EN|TCD_RS) ;
LCD_PORT = ( (dat&0xF0)|LCD_RS) ;
LCD_PORT = ( ( (dat<<4) &0xF0) |LCD_EN|LCD_RS) ;
LCD_PORT = ( ( (dat<<4) &0xF0) | LCD_RS) ;
delayms(3) ;
}

void LCD_display_String (unsigned char line, unsigned char row, unsigned char *s)
{
   unsigned char temp;
if (line==0) temp=0x80|row; //在0行|row列显示.
else
temp=0xc0+row; //在1行+row列显示
LCD_sent_cmd (temp) ;
while(*s)
{ LCD_sent_daLa(*s++) ;
dc1ayms(3) 
}
}

void LCD_reset (void)
{
dclayms(20) ;
LCD_PORT= 0x30+LCD_EN;
LCD_PORT =0X30;
delayms(10) ;
LCD_PORT = 0x30+LCD_EN;
LCD PORT=0x30;
delayms(3) ;
LCD_PORT = 0x30+LCD_EN;
LCD PORT=0x30;
delayms(3) ;
LCD_PORT = 0x20+LCD_EN;
LCD PORT=0x20;
delayms(3) ;
}

void LCD_init(void)
{
LCD_rosct();//复位
ICID_sent_cmd(0x02);
LCD_sent_cmd (0X28) ;// 4-bit模式， 2行，5x1分辨率.
LCD_sent_cmd (0x0C) ;//无光标，无闪烁
LCD_sent_cmd(0x06) ;//显示地址自增，无移位.
}

void delay(unsigned char L)
{
unsigned char i;
for(i-t;i;i ) ;
}

void de1ayms (unsigned char t)
{
unsigned int j ;
unsigned char i;
for(i-0;i<t;i++)
for(j=0; j<1140; j++) ;
}

下面为lcd4bit.h文件