lm3228.c

液晶显示的完整程序

#include <at89c51RB2.h>
#include <absacc.h>
#include <intrins.h>
#include "ds1302.h"

/********************************************************************************************/
#define COMMAND_PORT XBYTE[0x8100] //定义命令端口地址
#define DATA_PORT XBYTE[0x8000]	   //定义数据端口地址
#define uchar unsigned char
#define uint unsigned int
//#define DAT1 DBYTE[0x30]		   //
//#define DAT2 DBYTE[0x31]
//#define COM DBYTE[0x32]
#define CODESTATE 0x01 //定义检测位
#define DATASTATE 0x02
#define DATAAUTOREAD 0x04
#define DATAAUTOWRITE 0x08
#define CONTROLLER  0x20
#define SCREENCOPY 0x40
#define BLINKCONTITION 0x80
void delay(void)
{
	uint i,j;
	for(i=0;i<5666;i++);
	for(j=0;j<200;j++);
}

/********************************************************************************************/
//检查状态
bit check_state(uchar check_bit)
{
	uchar state;
	state=COMMAND_PORT;
	switch(check_bit)
	{
		case CODESTATE:
		{
			if(state&0x01)
			return 1;
			else
			return 0;
		}
		case DATASTATE:
		{
			if(state&0x02)
			return 1;
			else
			return 0;
		}			 
		case DATAAUTOREAD:
		{
			if(state&0x04)
			return 1;
			else
			return 0;
		}
		case DATAAUTOWRITE:
		{
			if(state&0x08)
			return 1;
			else
			return 0;
		}
		case CONTROLLER:
		{
			if(state&0x02)
			return 1;
			else
			return 0;
		}
		case SCREENCOPY:
		{
			if(state&0x40)
			return 0;
			else
			return 1;
		}
		case BLINKCONTITION:
		{
			if(state&0x80)
			return 1;
			else
			return 0;
		}
			
	}
}
/********************************************************************************************/
//判断自动写
void check_auto_write(void)
{
	while(!(check_state(DATAAUTOWRITE)));
}
/********************************************************************************************/
void check_code_data(void)
{
	while(!(check_state(CODESTATE)));
	while(!(check_state(DATASTATE)));
}
/********************************************************************************************/
//指针设置
#define SET_CURSOR_POINTER 0x01

#define SET_CGRAM_POINTER 0X02
#define SET_ADDRESS_POINTER 0x04
void set_point(uchar i,uchar dat1,uchar dat2)
{
	check_code_data();
		
	DATA_PORT=dat1;
	check_code_data();
	DATA_PORT=dat2;
	check_code_data();
	COMMAND_PORT=(0x20|i);
}
/********************************************************************************************/
//显示区域设置
#define TEXT_ADDRESS 0x00
#define TEXT_WIDTH 0x01
#define GRAPHIC_ADDRESS 0x02
#define GRAPHIC_WIDTH 0x03
void set_display_area(uchar i,uchar dat1,uchar dat2)
{
	if(i==0x01||i==0x03)
		dat2=0;
	check_code_data();
	DATA_PORT=dat1;
	check_code_data();
	DATA_PORT=dat2;
	check_code_data();
	COMMAND_PORT=(0x40|i);
}
/********************************************************************************************/
//显示开关设置
#define CURSORBLINK 0x01
#define CURSORON 0x02
#define TEXTON 0x04
#define GRAPHICON 0x08

void set_display(uchar displaymode)
{
	check_code_data();
	COMMAND_PORT=(displaymode|0x90);
}
/********************************************************************************************/
//光标形状设置
//参数0-7
void set_cursor(uchar i)
{
	check_code_data();
	COMMAND_PORT=(0xa0|i);
}
/********************************************************************************************/
//自动读写定义
#define AUTOREAD 0x00
#define AUTOWRITE 0x01
#define AUTOSTOP 0x02
void set_autoreadwrite(uchar i)
{
	check_code_data();
	COMMAND_PORT=(0xb0|i);
}
/********************************************************************************************/
//一次读写定义
#define write_address_add 0x00
#define read_address_add 0x01
#define write_address_sub 0x02
#define read_address_sub 0x03
#define write_address_nochange 0x04
#define read_address_nochange 0x05
void set_once_read_write(uchar i,uchar letter)
{
	check_code_data();
	DATA_PORT=letter;
	check_code_data();
	COMMAND_PORT=(0xc0|i);
}

/********************************************************************************************/
//屏读
void screen_read(void)
{
	check_code_data();
	 COMMAND_PORT=0xe0;
}

/********************************************************************************************/
//屏拷贝
void screen_copy(void)
{
	check_code_data();
	COMMAND_PORT=0xe8;
}
/********************************************************************************************/
//位操作
#define set_bit 0x08
#define clear_bit 0x00
void bit_operation(uchar op,uchar i)
{
	check_code_data();
	COMMAND_PORT=(0xf0|op|i);
}
/********************************************************************************************/
void print_lcd(uchar str,uchar x,uchar y)
{
	unsigned int addr;
	addr=y*16+x;

	check_code_data();
	DATA_PORT=addr;
	check_code_data();
	DATA_PORT=addr>>8;
	check_code_data();
	COMMAND_PORT=0x24;
	check_code_data();
	DATA_PORT=str;
	check_code_data();
	COMMAND_PORT=0xc4;
}	
/********************************************************************************************/
//显示字符
void text_display(uchar num,uchar *str,uchar lowaddr,uchar highaddr)
{
	uchar i;
	set_point(SET_ADDRESS_POINTER,lowaddr,highaddr);
	for(i=0;i<num;i++)
	{
		set_once_read_write(write_address_add,str[i]);
	}
}
/********************************************************************************************/
//显示汉字
void hanzi_display(uchar *str,uchar num,uchar lowaddr,uchar highaddr)
{
	uchar i,j,k,laddr,haddr,addr,caddr,m ; 
	uint sum=0;
	laddr=lowaddr;
	haddr=highaddr;
	m=0;
	for(k=0;k<num;k++)
	{
		
		caddr=laddr+m*2;
		m++;
		if(caddr>0x0e)
		{
			laddr=0x00;
			haddr++;
			caddr=0x00;
			//num=num-k;
			m=0;
			
			caddr=laddr+m*2;
			m++;
		}
		for(i=0;i<16;i++)
		{
			addr=caddr+16*i;
			
			
			set_point(SET_ADDRESS_POINTER,addr,haddr);
			for(j=0;j<2;j++)
			{
				set_once_read_write(write_address_add,str[sum++]);//[k*32+i*2+j]);
			}
		}
	}
}
/********************************************************************************************/
//清屏
void clrscreen(void)
{
	
}
/********************************************************************************************/
//图片显示
void picture_display(uchar *str,uint len,uchar lowaddr,uchar highaddr)
{
	uint i,sum;
	sum=0;
	set_point(SET_ADDRESS_POINTER,lowaddr,highaddr);
	for(i=0;i<len;i++)
	{

	set_once_read_write(write_address_add,str[sum++]);
	}	
}
/*void display(void)
{
	picture_display(picture2,sizeof(picture2),0x00,0x10);
} */
		
/********************************************************************************************/	

//初始化lcd
void init_lcd(void)
{

	
	//uint i,j;
	set_display_area(TEXT_ADDRESS,0x00,0x00);
	set_display_area(TEXT_WIDTH,0x10,0x00);	//因为3228是128*64，显示的字符为16*8，所以字符宽度为16
	set_display_area(GRAPHIC_ADDRESS,0x00,0x10);
	set_display_area(GRAPHIC_WIDTH,0x10,0x00);
	set_display(TEXTON|GRAPHICON);
	//set_point(SET_ADDRESS_POINTER,0x34,0x00);
	//text_display(sizeof(letter),letter);
	//set_point(SET_ADDRESS_POINTER,0x00,0x10);
	
	



}