前两天接到老师的任务，使用STC89C52RC单片机做一个卡务信息管理系统，现在我给出部分文件，提供大家调用

首先给的是lcd12864.h，因为网上给的方案大多数都是只能显示字符或者字符串，不能直接显示数字，然后我对这部分进行了补充。
显示数字：void DisplayNumber(uchar X, uchar Y, uint32 number,uchar count); //显示一串数字
其实就是取每一位然后加上字符’0’的值就可以，其中用到的所有延时都是精确的延时，我使用定时器做的，而不是用软件延时的方法。
lcd12864.h

#include "head.h"
//LCD相关端口定义

sbit LCD_RS=P0^7;
sbit LCD_RW=P0^6;
sbit LCD_E=P0^5;
sbit PSB=P0^4;          //PSB脚为12864-12系列的串、并通讯功能切换


#define LCD_Data P2     //LCD数据口
#define Busy 0x80


#ifndef _LCD12864_
#define _LCD12864_



//函数声明
void LCDInit(void);     //LCD初始化
void WriteCommandLCD(uchar WCLCD,BuysC);    //写指令
uchar ReadStatusLCD(void);          //读状态即检测忙
void WriteDataLCD(uchar WDLCD);     //写数据
uchar ReadDataLCD(void);            //读数据
void LCDClear(void);                //清屏
void LCDFlash(void);                //屏幕闪动
void DisplayOneChar(uchar X,uchar Y,uchar DData);   //显示一个字符
void DisplayListChar(uchar X, uchar Y, uchar *DData);   //显示一串字符
void DisplayImage(uchar code *DData);   //显示图形
void DisplayNumber(uchar X, uchar Y, uint32 number,uchar count);    //显示一串数字

#endif

lcd12864.c

#include "Lcd12864.h"
#include "timer.h"
#include "auart.h"





//LCD初始化
void LCDInit(void)
{
    WriteCommandLCD(0x30,1);        //显示模式设置，开始要求每次检测忙信号
    WriteCommandLCD(0x01,1);        //显示清屏
    WriteCommandLCD(0x06,1);        //显示光标移动设置
    WriteCommandLCD(0x0C,1);        //显示开及光标设置

}


//读状态
uchar ReadStatusLCD(void)
{
    LCD_Data = 0xFF;
    LCD_RS = 0;
    LCD_RW = 1;
    LCD_E = 1;
    while(LCD_Data & Busy)  //检测忙信号
    ;
    return LCD_Data;
}

//写指令
void WriteCommandLCD(uchar WCLCD,BuysC)
{
    if(BuysC)
    ReadStatusLCD();
      LCD_RS = 0;
      LCD_RW = 0;
      LCD_Data = WCLCD;
      LCD_E = 1;
      LCD_E = 1;
      LCD_E = 1;
      LCD_E = 0;
}


//写数据
void WriteDataLCD(uchar WDLCD)
{
    ReadStatusLCD();        //检测忙
    LCD_RS = 1;
    LCD_RW = 0;
    LCD_Data = WDLCD;
    LCD_E = 1;
    LCD_E = 1;
    LCD_E = 1;
    LCD_E = 0;
}

//读数据
uchar ReadDataLCD(void)
{
    LCD_RS = 1;
    LCD_RW = 1;
    LCD_E = 0;
    LCD_E = 0;
    LCD_E = 1;
    return (LCD_Data);
}


//清屏
void LCDClear(void)
{
    WriteCommandLCD(0x01,1);        //显示清屏
    WriteCommandLCD(0x34,1);        //显示光标移动设置
    WriteCommandLCD(0x30,1);        //显示开及光标设置
}




//屏幕闪动
void LCDFlash(void)
{
    WriteCommandLCD(0x08,1);        //显示清屏
    Delayms(400);
    WriteCommandLCD(0x0c,1);        //显示开及光标设置
    Delayms(400);
    WriteCommandLCD(0x08,1);        //显示清屏
    Delayms(400);
    WriteCommandLCD(0x0c,1);        //显示开及光标设置
    Delayms(400);
    WriteCommandLCD(0x08,1);        //显示清屏
    Delayms(400);

}



//显示一个字符
void DisplayOneChar(uchar X,uchar Y,uchar DData)
{
    if(Y<1)
    {
        Y = 1;
    }
    if(Y>4)
    {
        Y = 4;
    }
    X &= 0x0F;      //限制X不能大于16，Y不能大于1
    switch(Y)
    {
        case 1:
            X |= 0x80;
            break;
        case 2:
            X |=0x90;
            break;
        case 3:
            X |=0x88;
            break;
        case 4:
            X |=0x98;
            break;
    }

    WriteCommandLCD(X,0);       //这里不检测忙信号，发送地址码
    WriteDataLCD(DData);
}

//显示一串字符
void DisplayListChar(uchar X, uchar Y, uchar *DData)
{
    uchar ListLength,X2;
    ListLength = 0;
    X2 = X;
    if(Y<1)
    {
        Y = 1;
    }
    if(Y>4)
    {
        Y=4;
    }
    X &= 0x0F;      //限制X不能大于16，Y在1-4之内
    switch(Y)
    {
        case 1:
            X2 |=0x80;
            break;
        case 2:
            X2 |=0x90;
            break;
        case 3:
            X2 |=0x88;
            break;
        case 4:
            X2 |=0x98;
            break;
    }
    WriteCommandLCD(X2,1);      //发送地址码
    while(DData[ListLength]>=0x20)      //若到达字串尾则退出
    {
        if(X <= 0x0F)   //X坐标应小于0x0F
        {
            WriteDataLCD(DData[ListLength]);
            ListLength++;
            X++;
            Delayms(5);
        }
    }
}




//显示一串数字

void DisplayNumber(uchar X, uchar Y, uint32 number,uchar count)
{
    uchar array[11];
    uchar i;
    array[count] = 0;
    for (i = count; i>0; i--)
    {
        array[i-1] = number % 10 + '0';
        number /= 10;
    }

    for (i = 0; i < count - 1; i++)
    {
        if(array[i] == '0')
        {
            array[i] = ' ';
        }
        else
        {
            break;
        }
    }


    for (i = 0; i < count; i++)
    {
        PSendChar(array[i]);
    }

    DisplayListChar(X,Y,array);
}


void DisplayImage(uchar code *DData)
{
    uchar x, y, i;
    uint16 tmp = 0;
    for(i = 0; i < 9; i+=8)     //分两屏，上半屏和下半屏
    {
        for(x=0; x<32; x++)
        {
            WriteCommandLCD(0x34,1);
            WriteCommandLCD(0x80+x,1);      //列地址
            WriteCommandLCD(0x80+i,1);      //行地址，下半屏
            for(y=0;y<16;y++)
            {
                WriteDataLCD(DData[tmp+y]); //读取数据写入LCD
            }
            tmp +=16;
        }
    }
    WriteCommandLCD(0x36,1);        //扩充功能设定
    WriteCommandLCD(0x30,1);
}