lcd2.c

此包包括以HD4478位控制器的LCD说明

#include <stdio.h>
#include <absacc.h>
#include <intrins.h>
//显示"Welcome to UCos-II world!"
//采用液晶屏以HD4478控制器，双行显示
//效果为上述字符以Welcome   to
//                UCos-II world ！ 形式从屏幕最右侧开始向左侧双行滚动显示
//采用keil编译器
//单片机与lcd采用直接连接方式
#define W_command XBYTE[0XF800]//根据实际定义写命令寄存器地址
#define R_command XBYTE[0XF801]//读命令寄存器地址
#define RS XBYTE[0XF802]//RS选择地址

char display_buffer1[13]={0x57,0x65,0x6c,0x63,0x6f,0x6d,0x65,0x20,0x20,0x20,0x74,0x6f,0x20};//Welcome to 字码，其中0x20为空格字码
char display_buffer2[15]={0x55,0x43,0x6f,0x73,0x2d,0x49,0x49,0x20,0x77,0x6f,0x72,0x6c,0x64,0x20,0x21};//UCos-II world ！字码
void c_send(unsigned char a);//写命令到lcd
void d_send(unsigned char b);//写数据到lcd 

void delay()
{
	int i;
	for(i=0;i<2000;i++);
}

void c_send(unsigned char a)
{
	RS=0x00;
	W_command=a;
	delay();
}

void d_send(unsigned char b)
{
	RS=0x01;
	W_command=b;
	delay();
}
//命令字察看相关手册
void main()
{
	unsigned char i,j,m,n;
	delay();
	c_send(0x38);
	c_send(0x01);
        c_send(0x0c);
        c_send(0x07);
	c_send(0x1c);
	while(1)
	{
		c_send(0x81);
		for(i=0;i<=12;i++)
		{
	 		d_send(display_buffer1[i]);
			for(m=0;m<20;m++)
			{
			delay();
			}
		}
		c_send(0xc1);
		for(j=0;j<=15;j++)
		{
			d_send(display_buffer2[j]);
			for(n=0;n<20;n++)
			{
				delay();
			}
		}
	}	
}