文件：lcd_1602.h

#ifndef _LCD1602_TRAVELER_H_

#define _LCD1602_TRAVELER_H_

/*************************待配置項(xiàng)*******************************/

#define DATA_LCD P0 //液晶與MCU 數(shù)據(jù)口

sbit RS_LCD = P2^5; // 液晶的RS、RW、E 端在 MCU端的連線

sbit RW_LCD = P2^6;

sbit E_LCD = P2^7;

/****************************************************************/

void lcdInit(void);

//lcdInit() 液晶初始化、所有對(duì)液晶的操作之前均需要調(diào)用此函數(shù)

void lcdDelayMs(const unsigned char ms);

// lcdDelayMs(ms) 液晶內(nèi)部使用的毫秒級(jí)延時(shí)函數(shù) 如不需要請(qǐng)自行刪除

// 該驅(qū)動(dòng)函數(shù)須在不超過12MHz的晶振頻率下才能正常工作

void lcdDelayUs(const unsigned char us);

// lcdDelayMs(ms) 液晶內(nèi)部使用的微秒級(jí)延時(shí)函數(shù) 如不需要請(qǐng)自行刪除

// 該驅(qū)動(dòng)函數(shù)須在不超過12MHz的晶振頻率下才能正常工作

void lcdWriteCmd(const unsigned char cmd);

// lcdWriteCmd(cmd) 向液晶寫命令字函數(shù)

void lcdWriteChar(const unsigned char chr);

// lcdWriteChar(chr) 向液晶寫字符函數(shù)

void lcdWriteData(const unsigned char pos,const unsigned char dat);

//lcdWriteData(pos,dat)向液晶板上指定位置寫字符函數(shù)

void lcdWriteString(const unsigned char line,unsigned char *str,const unsigned char offset);

//lcdWriteString(line,*str,offset) 向液晶面板指定行、寫字符串 可指定首字符偏移量 所顯示的區(qū)域限制在當(dāng)前行內(nèi)

bit lcdReadBusy();

//讀lcd的忙標(biāo)志 忙 返回1 不忙 返回0

void lcdWriteUint(unsigned char line,unsigned int c,unsigned char offset);

//lcdWriteUint(unsigned char line,unsigned int c,unsigned char offset)寫無符號(hào)整形數(shù) 到lcd (占位 5 字符)

//line 指明所在行、c要寫的數(shù)據(jù)、offset 距首列偏移量

#endif

——————————————————

文件：lcd_1602.c

#include

#include "lcd_1602.h"

/*************************************************************************/

/***********************12MHz晶振下微秒級(jí)延時(shí)*****************************/

void lcdDelayUs(const unsigned char us){

unsigned char cin = us>>1; //prepare for clause while calculating time

cin++;

while(--cin);// 'dec cin' and 'jnz cin' 2 circles

}

/*************************************************************************/

/***********************12MHz晶振下毫秒級(jí)延時(shí)*****************************/

void lcdDelayMs(const unsigned char ms){

unsigned char cin = ms+1;

while(--cin){

lcdDelayUs(250);

lcdDelayUs(250);

lcdDelayUs(250);

lcdDelayUs(250);

}

}

/*************************************************************************/

/**************************寫命令字***************************************/

void lcdWriteCmd(const unsigned char cmd){

while(lcdReadBusy());

E_LCD = 0;

RS_LCD = 0;

RW_LCD = 0;

DATA_LCD = cmd;

lcdDelayUs(40);

E_LCD = 1;

lcdDelayUs(250);

E_LCD = 0;

lcdDelayUs(250);

}

/*************************************************************************/

/************************寫字符********************************************/

void lcdWriteChar(const unsigned char chr){

while(lcdReadBusy());

E_LCD = 0;

RS_LCD = 1;

RW_LCD = 0 ;

DATA_LCD = chr;

lcdDelayUs(40);

E_LCD = 1;

lcdDelayUs(250);

E_LCD = 0;

lcdDelayUs(250);

}

/*************************************************************************/

/*******************向指定位置寫字符**************************************/

void lcdWriteData(const unsigned char pos,const unsigned char dat){

unsigned char p;

if(pos>=16) p = 0xb0 + pos ;

else p = 0x80 + pos ;

lcdWriteCmd(p);

lcdWriteChar(dat);

}

/*************************************************************************/

/**************************寫字符串***************************************/

void lcdWriteString(const unsigned char line,unsigned char *str,const unsigned char offset){

unsigned char p;

unsigned char curlineend = (line)?32:16; //每次寫字符串最多允許寫完單行，不允許跨行寫

unsigned char i=0;

if(line) p = 16;else p = 0;

p = p + offset;

while(p!=curlineend){

if(!str[i])break;//如果到字符尾則退出

lcdWriteData(p++,str[i++]);

}

}

/*************************************************************************/

/************************初始化液晶***************************************/

void lcdInit(void){

lcdDelayMs(15);

lcdWriteCmd(0x38);

lcdWriteCmd(0x38);

lcdWriteCmd(0x38);[!--empirenews.page--]

lcdWriteCmd(0x06);

lcdWriteCmd(0x0c);

lcdWriteCmd(0x01);

lcdWriteData(1,' ');//此為驅(qū)動(dòng)的bug，未消除bug之前請(qǐng)勿刪除此行及下行兩行

lcdWriteCmd(0x0c);

}

/*************************************************************************/

bit lcdReadBusy(){

bit i = 1;

E_LCD = 0;

RS_LCD = 0;

RW_LCD = 1;

E_LCD = 1;

i = DATA_LCD & 0x80;

return i;

}

//lcdWriteUint(unsigned char line,unsigned int c,unsigned char offset)寫無符號(hào)整形數(shù) 到lcd (占位 5 字符)

//line 指明所在行、c要寫的數(shù)據(jù)、offset 距首列偏移量

void lcdWriteUint(unsigned char line,unsigned int c,unsigned char offset){

unsigned char i,j;

unsigned char arrTmp[6] = {" "};

j = 0;

do{

i = c % 10;

arrTmp[4 - j] = i + '0';

j ++ ;

c /= 10;

}while(c);

lcdWriteString(line,arrTmp,offset);

}