12864中文字库液晶基本操作函数库

module_12864.h

#include

#define IO_12864 P0 //定义12864的数据端口

sbit RS_12864 = P2^5; //定义命令数据寄存器选择端

sbit RW_12864 = P2^6; //定义定义读写控制端

sbit E_12864 = P2^7; //定义使能端

sbit RST_12864 = P2^2; //定义复位端

void delay_12864(unsigned int ); //延时子函数原型

void busychk_12864(void); //忙检测子函数原型

void wrtcom_12864(unsigned char); //写命令子函数原型

unsigned char reddat_12864(void); //读数据子函数原型

void wrtdat_12864(unsigned char); //写数据子函数原型

void drawpic_12864( unsigned char*); //绘图子函数原型

void drawdot_12864(unsigned char,unsigned char,unsigned char);//画点子函数原型

//画矩形子函数原型

void drawrec_12864(unsigned char,unsigned char,

unsigned char,unsigned char,unsigned char);

void clnGDR_12864(void); //清空GDRAM子函数原型

//输入短字符串子函数原型

void inputchars_12864(unsigned char,unsigned char,unsigned char*);

void scroll_12864(unsigned char*); //输入长字符串卷动子函数原型

void initial_12864(void); //12864初始化子函数原型

modlule_12864.c

//*延时子程序，最大延迟时间为65ms

void delay_12864(unsigned int del){

unsigned int i;

for(i = 0; i < del; i++){;}

}

//*忙检测，若忙则等待，最长等待时间为60ms

void busychk_12864(void){

unsigned int timeout = 0;

E_12864 = 0;

RS_12864 = 0;

RW_12864 = 1;

E_12864 = 1;

while((IO_12864 & 0x80) && ++timeout != 0); //忙状态检测，等待超时时间为60ms

E_12864 = 0;

}

//写命令子程序

void wrtcom_12864(unsigned char com){

busychk_12864();

E_12864 = 0;

RS_12864 = 0;

RW_12864 = 0;

IO_12864 = com;

E_12864 = 1;

delay_12864(50); //使能延时50us!!!注意这里，如果是较快的CPU应该延时久一些

E_12864 = 0;

}

//读数据子程序，返回一个字节的数据

unsigned char reddat_12864(void){

unsigned char temp;

busychk_12864();

E_12864 = 0;

IO_12864 = 0xff; //IO口置高电平，读引脚

RS_12864 = 1;

RW_12864 = 1;

E_12864 = 1;

delay_12864(50); //使能延时50us!!!注意这里，如果是较快的CPU应该延时久一些

temp = IO_12864;

return temp;

}

//写数据子程序

void wrtdat_12864(unsigned char dat){

busychk_12864();

E_12864 = 0;

RS_12864 = 1;

RW_12864 = 0;

E_12864 = 1;

IO_12864 = dat;

delay_12864(50); //使能延时50us!!!注意这里，如果是较快的CPU应该延时久一些

E_12864 = 0;

}

//显示图片函数，参数时图片的地址，图片必须是128*64像素的逐行逐行的点阵信息。

void drawpic_12864( unsigned char *pPicture ){

unsigned char j, k ;

wrtcom_12864(0x34); //在写GDRAM的地址之前一定要打开扩充指令集，否则地址写不进去!!

for( j = 0 ; j < 32 ; j++ )

{

wrtcom_12864(0x80 + j) ; //写Y 坐标

wrtcom_12864(0x80) ; //写X 坐标

for( k = 0 ; k < 16 ; k++ ) //写一整行数据

{

wrtdat_12864( *pPicture++ );

}

}

for( j = 0 ; j < 32 ; j++ )

{

wrtcom_12864(0x80 + j) ; //写Y 坐标

wrtcom_12864(0x88) ; //写X 坐标

for( k = 0 ; k < 16 ; k++ ) //写一整行数据

{

wrtdat_12864( *pPicture++ ) ;

}

}

wrtcom_12864(0x36); //打开绘图显示

wrtcom_12864(0x30); //返回基本指令集

}

//画点函数,左上角为参考点(0，0)

//右下角为(127,63)，点坐标形式为(行坐标，列坐标)

//参数type用于设置画黑点、白点或取反(黑变白，白变黑)

//type = 0为白色，1 为黑色，2为取反

//画完点不开启显示，需要自行开启绘图显示

void drawdot_12864(unsigned char y,unsigned char x,unsigned char type){

unsigned char X,Y,k; //X存储行地址，Y存储列地址，k存储点在字中的位置(0~15从左至右)

unsigned char DH,DL;

if(y >= 0 && y <= 63 && x >= 0 && x <= 127) {

if(y < 32){ //确定所画点的地址行与列地址

X = 0x80 + (x >> 4);

Y = 0x80 + y;

}else{

X = 0x88 + (x >> 4);

Y = 0x80 + (y - 32);

}

wrtcom_12864(0x34); //开启扩展指令，关闭绘图显示

wrtcom_12864(Y); //写行位地址

wrtcom_12864(X); //写列字地址

DH = reddat_12864(); //假读

DH = reddat_12864(); //读高字节

DL = reddat_12864(); //读低字节

k = x % 16;

switch(type){ //判断类型，是黑点还是白点还是取反

case 0: //画白点

if(k < 8){

DH &= ~(0x01 << (7 - k));

}else{

DL &= ~(0x01 << (7 - (k % 8)));

}

break;

case 1: //画黑点

if(k < 8){

DH |= (0x01 << (7 - k));

}else{

DL |= (0x01 << (7 - (k % 8)));

}

break;

case 2: //对点取反

if(k < 8){

DH ^= (0x01 << (7 - k));

}else{

DL ^= (0x01 << (7 - (k % 8)));

}

break;

default:

break;

}

wrtcom_12864(Y); //写行位地址

wrtcom_12864(X); //写列字地址

wrtdat_12864(DH); //回写高字节

wrtdat_12864(DL); //回写低字节

wrtcom_12864(0x36); //开启绘图显示

wrtcom_12864(0x30); //转回普通指令

}

}

//画矩形子函数，参数为(点1行坐标，点1列坐标，点2行坐标，点2列坐标，

//线条颜色(0为白，1为黑，2对原色取反))

void drawrec_12864(unsigned char y1,unsigned char x1,unsigned char y2,unsigned char x2,unsigned char type){

unsigned char largex,largey,smallx,smally;

unsigned char i;

if(x1 > x2){

largex = x1;

smallx = x2;

}else{

largex = x2;

smallx = x1;

}

if(y1 > y2){

largey = y1;

smally = y2;

}else{

largey = y2;

smally = y1;

}

//画4条矩形边框

for(i = smallx; i < largex; i++){

drawdot_12864(largey,i,type);

}

for(i = largey; i > smally; i--){

drawdot_12864(i,largex,type);

}

for(i = largex; i > smallx; i--){

drawdot_12864(smally,i,type);

}

for(i = smally; i < largey; i++){

drawdot_12864(i,smallx,type);

}

wrtcom_12864(0x30); //返回普通指令

}

//清空GDRAM，往GDRAM内部写满0x00

void clnGDR_12864(void){

unsigned char j,k;

wrtcom_12864(0x34);//在写GDRAM的地址之前一定要打开扩充指令集，否则地址写不进去!!

for( j = 0 ; j < 32 ; j++ )

{

wrtcom_12864(0x80 + j) ; //写Y 坐标

wrtcom_12864(0x80) ; //写X 坐标

for( k = 0 ; k < 32 ; k++ ) //写一整行数据

{

wrtdat_12864( 0x00 );

}

}

wrtcom_12864(0x30); //返回基本指令集

}

//写入短字符串函数,参数分别为显示行(0~3)，显示列(0~7)，字符串首地址

//字符串只会在一行显示，超过的不显示

void inputchars_12864(unsigned char y,unsigned char x,unsigned char *dataaddr){

unsigned char i,address;

switch (y){ //设置字符显示起始地址

case 0: address = 0x80 + x;

break;

case 1: address = 0x90 + x;

break;

case 2: address = 0x88 + x;

break;

case 3: address = 0x98 + x;

break;

default: break;

}

wrtcom_12864(0x30);

wrtcom_12864(address);

for(i = x;i < 8; i++){

if(*dataaddr != '\0'){

wrtdat_12864(*dataaddr++);

}

}

}

//长字符串显示卷屏函数

void scroll_12864(unsigned char *ser){

//addr存储地址的中间变量，flag卷屏地址，hang要写数据的行，

//over写完字符串后继续写的空字符计数

unsigned char i,addr,flag,hang,over,*ptdat;

ptdat = ser; //获得字符串首地址

over = 0; //写入空字符串(写完字符串后)数目初始化为0

wrtcom_12864(0x80); //写第一行字符

for(i = 0; i < 16; i++){

if(*ptdat != '\0'){

wrtdat_12864(*ptdat++);

}else{

wrtdat_12864(0x20);

over++;

}

}

wrtcom_12864(0x90); //写第二行字符

for(i = 0; i < 16; i++){

if(*ptdat != '\0'){

wrtdat_12864(*ptdat++);

}else{

wrtdat_12864(0x20);

over++;

}

}

wrtcom_12864(0x88); //写第三行字符

for(i = 0; i < 16; i++){

if(*ptdat != '\0'){

wrtdat_12864(*ptdat++);

}else{

wrtdat_12864(0x20);

over++;

}

}

wrtcom_12864(0x98); //写第四行字符

for(i = 0; i < 16; i++){

if(*ptdat != '\0'){

wrtdat_12864(*ptdat++);

}else{

wrtdat_12864(0x20);

over++;

}

}

ptdat = ptdat - 32;

wrtcom_12864(0xa0); //写第三行DDRAM,写入内容为第三行字符串和第五行字符串

for(i = 0; i < 16; i++){ //写第三行字符串

if(*ptdat != '\0'){

wrtdat_12864(*ptdat++);

}else{

wrtdat_12864(0x20);

over++;

}

}

ptdat = ptdat + 16;

for(i = 0; i < 16; i++){ //写第五行字符串

if(*ptdat != '\0'){

wrtdat_12864(*ptdat++);

}else{

wrtdat_12864(0x20);

over++;

}

}

wrtcom_12864(0x0c); //开显示

if(over > 15){;} //显示字符不足4行，不卷动

else //显示字符大于4行，继续写字符，同时开启卷动

{

hang = 4;

flag = 0x01;

while(1){

switch(hang){ //设置写入DDRAM的地址

case 1: addr = 0x80; break;

case 2: addr = 0x90; break;

case 3: addr = 0xa0; break;

case 4: addr = 0xb0; break;

}

switch(hang){ //设置要写数据的下一行

case 1: hang = 2; break;

case 2: hang = 3; break;

case 3: hang = 4; break;

case 4: hang = 1; break;

}

ptdat = ptdat - 32;

for(i = 0; i < 8; i++){

wrtcom_12864(0x34); //打开扩展指令

wrtcom_12864(0x03); //允许输入卷动地址

wrtcom_12864(0x40 + flag++); //设置卷动地址

wrtcom_12864(0x30); //回到基本指令

wrtcom_12864(addr + i);

delay_12864(20000);

if(*ptdat != '\0'){

wrtdat_12864(*ptdat++); //连续写入两个字节之高字节

}else{

wrtdat_12864(0x20);

}

if(*ptdat != '\0'){

wrtdat_12864(*ptdat++); //连续写入两个字节之低字节

}else{

wrtdat_12864(0x20);

}

}

ptdat = ptdat + 16;

for(i = 8; i < 16; i++){

wrtcom_12864(0x34); //打开扩展指令

wrtcom_12864(0x03); //允许输入卷动地址

if(flag == 64){flag = 0;}

wrtcom_12864(0x40 + flag); //设置卷动地址

flag++;

wrtcom_12864(0x30); //回到基本指令

wrtcom_12864(addr + i);

delay_12864(20000);

if(*ptdat != '\0'){

wrtdat_12864(*ptdat++); //连续写入两个字节之高字节

}else{

over++; //写完最后一行字符，需要再卷动16次才能显示出来。

wrtdat_12864(0x20);

}

if(*ptdat != '\0'){

wrtdat_12864(*ptdat++); /连续写入两个字节之低字节

}else{

wrtdat_12864(0x20);

}

}

if(over < 8){;} //最后一行显示完毕则停止卷动

else {break;}

}

}

}

//初始化12864子函数

void initial_12864(void){

delay_12864(40000);

RST_12864 = 1;

RST_12864 = 0; //复位

delay_12864(500);

RST_12864 = 1;

wrtcom_12864(0x30); //设置为基本指令集动作

delay_12864(100);

wrtcom_12864(0x30); //设置为基本指令集动作

delay_12864(37);

wrtcom_12864(0x08); //设置显示、光标、闪烁全关。

delay_12864(100);

wrtcom_12864(0x01); //清屏，并且DDRAM数据指针清零

delay_12864(100000);

wrtcom_12864(0x06); //进入模式设置

wrtcom_12864(0x0c); //开显示

}

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