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=http://www.mamicode.com/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]);
}
}
}