#include <ABSACC.H>
#include <INTRINS.H>
#include "common.h"
#define SCREEN_WIDTH 0x20
extern struct Pic *point_pic1;
/********************************************************************************************/
#define COMMAND_PORT XBYTE[0x8001] //定義命令端口地址
#define DATA_PORT XBYTE[0x8000] //定義數據端口地址
#define CODESTATE 0x01 //定義檢測位
#define DATASTATE 0x02
#define DATAAUTOREAD 0x04
#define DATAAUTOWRITE 0x08
#define CONTROLLER 0x20
#define SCREENCOPY 0x40
#define BLINKCONTITION 0x80
/********************************************************************************************/
//檢查狀態
volatile 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;
}
}
}
/********************************************************************************************/
//判斷自動寫
void check_auto_write(void) reentrant
{
while(!(check_state(DATAAUTOWRITE)));
}
/********************************************************************************************/
volatile void check_code_data(void) reentrant
{
while(!(check_state(CODESTATE)));
while(!(check_state(DATASTATE)));
}
/********************************************************************************************/
//指針設置
#define SET_CURSOR_POINTER 0x01 //設置光標位置
#define SET_CGRAM_POINTER 0X02 //設置CGRAM
#define SET_ADDRESS_POINTER 0x04
void set_point(uchar i,uchar data dat1,uchar data dat2) //向外部輸出的數要定義在 data 區中
{
check_code_data();
DATA_PORT=dat1;
check_code_data();
DATA_PORT=dat2;
check_code_data();
COMMAND_PORT=(0x20|i);
}
/********************************************************************************************/
//設置顯示模式
#define LOGIC_OR 0x00
#define LOGIC_XOR 0x01
#define LOGIC_AND 0x02
#define TEXT_CHAR 0x04
void set_display_mode(uchar dat)
{
check_code_data();
COMMAND_PORT=(0x80|dat);
}
/********************************************************************************************/
//顯示區域設置
#define TEXT_ADDRESS 0x00 //設置文本區首址
#define TEXT_WIDTH 0x01 //設置文本區寬度
#define GRAPHIC_ADDRESS 0x02 //設置圖形區首址
#define GRAPHIC_WIDTH 0x03 //設置圖形區寬度
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);
}
/********************************************************************************************/
//顯示開關設置
#define CURSORBLINK 0x01
#define CURSORON 0x02
#define TEXTON 0x04
#define GRAPHICON 0x08
void set_display(uchar displaymode)
{
check_code_data();
COMMAND_PORT=(displaymode|0x90);
}
/********************************************************************************************/
//光標形狀設置
//參數0-7
void set_cursor(uchar i)
{
check_code_data();
COMMAND_PORT=(0xa0|i);
}
/********************************************************************************************/
//自動讀寫定義
#define AUTOWRITE 0x00
#define AUTOREAD 0x01
#define AUTOSTOP 0x02
void set_autoreadwrite(uchar i) //reentrant
{
check_code_data();
COMMAND_PORT=(0xb0|i);
}
/********************************************************************************************/
//壹次讀寫定義
#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);
}*/
/********************************************************************************************/
//屏讀
/*void screen_read(void)
{
check_code_data();
COMMAND_PORT=0xe0;
}*/
/********************************************************************************************/
//屏拷貝
/*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;
}*/
/********************************************************************************************/
//顯示字符
void text_display(uchar str) //reentrant
{
//set_point(SET_ADDRESS_POINTER,lowaddr,highaddr);
//set_once_read_write(write_address_add,str-0x20);
set_autoreadwrite(AUTOWRITE);
check_auto_write();
DATA_PORT=str-0x20;
set_autoreadwrite(AUTOSTOP);
}
/********************************************************************************************/
//顯示字符串
void string_display(uchar data *str,uchar lowaddr,uchar highaddr) //reentrant
{
set_point(SET_ADDRESS_POINTER,lowaddr,highaddr);
set_autoreadwrite(AUTOWRITE);
while(*str!='\0')
//set_once_read_write(write_address_add,str[i]-0x20);
{check_auto_write();
DATA_PORT=*str-0x20;
str++;
}
set_autoreadwrite(AUTOSTOP);
}
/********************************************************************************************/
//顯示代碼區中的字符串
void string_display_code(uchar num,uchar code *str,uchar lowaddr,uchar highaddr) //reentrant
{
uchar i;
set_point(SET_ADDRESS_POINTER,lowaddr,highaddr);
set_autoreadwrite(AUTOWRITE);
if(num==0)
{
while(*str!='\0')
{
check_auto_write();
DATA_PORT=*str-0x20;
str++;
}
}
else
for(i=0;i<NUM;I++) if(lowaddr f0 0x1f #if(SCREEN_WIDTH="=0x20)" e0 ... haddr="0;addr=0;caddr=0;" lowaddr="lowaddr+2;" 3f 0x10 20 0x00 caddr="lowaddr;" 1f .............0x10 10 0f ..............0x10 01 00 256*256液晶的地址 { 顯示多少字因為壹個字是16*16點陣，所以占32字節空間 for(k="0;k<(num/32);k++)" data i,j,k,haddr,addr,caddr; uchar highaddr) lowaddr,uchar num,uchar *str,uint hanzi_display(uchar void 顯示漢字 ******************************************************************************************** } set_autoreadwrite(AUTOSTOP); str++; DATA_PORT="*str-0x20;" check_auto_write();>0x1e) //換行
{
lowaddr=0x00; //低地址
highaddr=highaddr+2;; //高位地址
}
#else
if(SCREEN_WIDTH==0x10) //註意不要和#else在壹行
if(lowaddr>0x0e) //換行
{
lowaddr=0x00; //低地址
highaddr=highaddr+1;; //高位地址
}
#endif
for(i=0;i<16;i++)
{
#if(SCREEN_WIDTH==0x20)
addr=caddr+32*i;
if(i==8)
haddr++;
#else
if(SCREEN_WIDTH==0x10)
addr=caddr+16*i;
#endif
set_point(SET_ADDRESS_POINTER,addr,haddr);
set_autoreadwrite(AUTOWRITE);
for(j=0;j<2;j++)
{
check_auto_write();
DATA_PORT=*str;
str++;
}
set_autoreadwrite(AUTOSTOP);
}
}
}
/********************************************************************************************/
//清圖形顯示緩沖區
void clrgraphic(void)
{
uint j;
set_point(SET_ADDRESS_POINTER,0x00,0x04);
set_autoreadwrite(AUTOWRITE);
for(j=0;j<4096;j++)
{
check_auto_write();
DATA_PORT=0x00;
}
set_autoreadwrite(AUTOSTOP);
}
/********************************************************************************************/
//清字符顯示緩沖區
void clrtext(void)
{
uint j;
set_point(SET_ADDRESS_POINTER,0x00,0x30);
set_autoreadwrite(AUTOWRITE);
for(j=0;j<1024;j++)
{
check_auto_write();
DATA_PORT=0x00;
}
set_autoreadwrite(AUTOSTOP);
}
/********************************************************************************************/
//圖片顯示
volatile void picture_display(Picture *point1,uchar lowaddr,uchar highaddr,bit inverse)
{
uchar data i,j,laddr;
Picture *point;
point=point1;
laddr=lowaddr;
CY=0;
for(i=0;i<(point->length);i++)
{
CY=0;
if(i)
laddr=laddr+32;
if(CY)
highaddr=highaddr+1;
set_point(SET_ADDRESS_POINTER,laddr,highaddr);
set_autoreadwrite(AUTOWRITE);
for(j=0;j<(point->width/8);j++)
{
if((laddr!=0x00)&&(j!=0)) //如果沒j!=0,當laddr=0x20、0x40..時，顯示不正常
if((laddr+j)%32==0)
{
(point->picturecode)=(point->picturecode)+(point->width/8-j);
break;
}
check_auto_write();
if(!inverse)
DATA_PORT=*(point->picturecode);
else
DATA_PORT=~*(point->picturecode);
(point->picturecode)++;
}
set_autoreadwrite(AUTOSTOP);
}
}
/********************************************************************************************/
//初始化lcd
void init_lcd(void)
{
//uint i,j;
set_display_area(TEXT_ADDRESS,0x00,0x30);
set_display_area(TEXT_WIDTH,SCREEN_WIDTH,0x00); //因為3228是128*64，顯示的字符為8*8，所以字符寬度為16
set_display_area(GRAPHIC_ADDRESS,0x00,0x00);
set_display_area(GRAPHIC_WIDTH,SCREEN_WIDTH,0x00);
set_display(TEXTON|GRAPHICON); //CURSORBLINK|CURSORON|
set_point(SET_ADDRESS_POINTER,0x00,0x00);
//set_point(SET_CURSOR_POINTER,0x4e,0x30);
set_display_mode(LOGIC_OR);
//set_point(SET_ADDRESS_POINTER,0x1c,0x2e);
}
順便說幾句，液晶的現實其實原理都是壹樣的，只是說帶字庫的編程要簡單壹些，壹般來說，對lcd的編程包括以下幾個步驟
1.讀狀態
2.讀數據
3.寫狀態
4，寫數據
5.初始化
只是說不帶字庫的點陣式lcd送數據的時候需要將數據的位置找出來再往裏面送數據。
多看幾個例子就可以了。很容易理解的