12864液晶使用的16*16点阵、128个字符（8*16点阵）及64*256点阵显示RAM(GDRAM).与外部CPU接口採用并行或串行两种控制方式。

在12864上显示0-9的随机数 第二行显示www.csdn.blog

第三行显示“求是07的博客”

第四行显示“欢迎光临”

下面是基本的代码

#include <reg52.h>

#include <intrins.h>

#include <stdlib.h>

#define uchar unsigned char

#define uint unsigned int

#define LCD_data=P0;

sbit rs=P3^5;

sbit wr=P3^6;

sbit en=P3^4;

sbit rd=P3^7;

sbit wela=P2^6;

sbit dula=P2^7;

uchar display1[10];

uchar code display2[]={"www.csdn.blog.com"};

uchar code display3[]={"求是07的博客"};

uchar code display4[]={"欢迎光临"};

void delay_1ms(uint x)

{

uint i,j;

for(i=0;i<x;i++)

for(j=0;j<100;j++);

}

void write_cmd(uchar cmd)

{

rs=0;

wr=0;

en=0;

P0=cmd;

delay_1ms(5);

en=1;

delay_1ms(5);

en=0;

}

void write_data(uchar dat)

{

rs=1;

wr=0;

en=0;

P0=dat;

delay_1ms(5);

en=1;

delay_1ms(5);

en=0;

}

void lcd_pos(uchar X,uchar Y)

{

uchar pos;

if(X==0)

{X=0x80;}

if(X==1)

{

X=0x90;

}

if(X==2)

{

X=0x88;

}

if(X==3)

{

X=0x98;

}

pos=X+Y;

write_cmd(pos);

}

void makerand() //随机函数

{

uint ran;

ran=rand();

display1[0]=ran/10000+0x30;

display1[1]=ran%10000/1000+0x30;

display1[2]=ran%1000/100+0x30;

display1[3]=ran%100/10+0x30;

display1[4]=ran%10+0x30;

ran=rand();

display1[5]=ran/10000+0x30;

display1[6]=ran%10000/1000+0x30;

display1[7]=ran%1000/100+0x30;

display1[8]=ran%100/10+0x30;

display1[9]=ran%10+0x30;

}

void lcd_init()

{

rd=1; //设置 并口方式

write_cmd(0x30);//这里设置基本指令动作

delay_1ms(5);

write_cmd(0x0C);//显示开，光光标

delay_1ms(5);

write_cmd(0x01);//清屏

delay_1ms(5);

}

main()

{

uchar i;

wela=0;

dula=0;

delay_1ms(5);

lcd_init();

lcd_pos(1,0);

i=0;

while(display2[i]!='\0')

{

write_data(display2[i]);

i++;

}

lcd_pos(2,0);

i=0;

while(display3[i]!='\0')

{

write_data(display3[i]);

i++;

}

lcd_pos(3,0);

i=0;

while(display4[i]!='\0')

{

write_data(display4[i]);

i++;

}

while(1)

{

lcd_pos(0,0);

makerand();

for(i=0;i<10;i++)

{

write_data(display1[i]);

}

}

}