原创 12864液晶显示资料及程序

 2007-7-26 11:26  12012 11 21 分类: MCU/ 嵌入式

今天终于完成了12864带字库液晶模块的图象和中英文字母显示，图象显示显示了自己的一副照片，呵呵，还认得出是自己，开心啊。。。硬件连接方式是：并口直接访问。

这是汉字显示程序：

#include<reg51.h>
#include<absacc.h>

#define uchar unsigned char

#define datawr 0x1200           //写数据通道
#define comwr 0x1000            //写控制命令通道
#define datare 0x1300           //读数据通道
#define comre 0x1100            //读忙通道

uchar code disp_data[]={"    浙江大学    "      //第一行，第一页
                        "04级通信工程一班"      //第三行
                        " 宁波理工学院 "      //第二行
                        "    竞赛小组    "      //第四行
                        "128X64液晶显示器"      //第一行，第二页
                        "    测试程序    "      //第三行
                        " 07年07月25日 "      //第二行
                        "    Tornado     "};    //第四行

void set12864();
void write_command(uchar command);
void write_page(uchar data_add);
void read_page(uchar data_add);
void delays(uchar cont);

void main()
{
    while(1)
    {
        set12864();             //初始化12864
        write_page(0);          //写入一页数据
        read_page(0x30);        //读出一页数据到内部RAM
        delays(2);              //延时2s
        write_page(64);         //写入下一页数据
        delays(2);              //延时2s
    }
}

//初始化12864子程序
void set12864()
{
    write_command(0x30);        //功能设定控制字
    write_command(0x0c);        //显示开关控制字
    write_command(0x01);        //清除屏幕控制字
    write_command(0x06);        //进入设定点控制字
}

//写控制命令子程序
void write_command(uchar command)
{
    bit flag="1";                 //12864空闲标志位
    while(flag)                 //检查12864是否空闲
        flag="XBYTE"[comre]&0x80;
    XBYTE[comwr]=command;       //空闲传送控制字
}

//写一页子程序
void write_page(uchar data_add)
{
    bit flag="1";                 //12864空闲标志位
    uchar num="64";               //64个循环,连续写入32个汉字或是64个西文字符
    write_command(0x80);
    for(;num>0;num--)
    {
        while(flag)             //检查12864是否空闲
            flag="XBYTE"[comre]&0x80;
        XBYTE[datawr]=disp_data[data_add++]; //空闲传送数据
    }
}

//读一页子程序
void read_page(uchar data_add)
{
    bit flag="1";                 //12864空闲标志位
    uchar num="64";               //64个循环,连续写入32个汉字或是64个西文字符
    write_command(0x80);
    for(;num>0;num--)
    {
        while(flag)             //检查12864是否空闲
            flag="XBYTE"[comre]&0x80;
        DBYTE[data_add++]=XBYTE[datare]; //空闲传送数据
    }
}

//延时cont秒子程序
void delays(uchar count)
{
    unsigned char h,i,j,k;
    do
    {
    for(h=5;h>0;h--)
    for(i=4;i>0;i--)
    for(j=116;j>0;j--)
    for(k=214;k>0;k--);
    }while(--count);
}

这是图象显示程序：

#include<reg51.h>
#include<absacc.h>

#define uchar unsigned char
#define uint unsigned int

uchar code disp_data[] =        // 数据表
{
      0x00,0x01,0x3F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,
      0x00,0x01,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x80,0x00,0x00,0x00,0x00,
      0x00,0x07,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xC0,0x00,0x00,0x00,0x00,
      0x00,0x07,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xE0,0x00,0x00,0x00,0x00,
      0x00,0x0F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xF0,0x00,0x00,0x00,0x00,
      0x00,0x0F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xF8,0x00,0x00,0x00,0x00,
      0x00,0x1F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFC,0x00,0x00,0x00,0x00,
      0x00,0x3F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0x80,0x00,0x00,0x00,
      0x00,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
      0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
      0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x03,0xFF,0xFF,0xFF,
      0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x07,0xFF,0xFF,
      0x01,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x80,0x00,0x0B,0xFF,
      0x01,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x80,0x00,0x00,0x1F,
      0x01,0xFF,0xFF,0xFF,0xFF,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xC0,0x00,0x00,0x00,
      0x01,0xFF,0xFF,0xFF,0xF3,0x79,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xC0,0x00,0x00,0x00,
      0x03,0xFF,0xFF,0xFF,0xE6,0x62,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xE1,0x60,0x00,0x68,
      0x01,0xFF,0xFF,0xFE,0x00,0x60,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xE1,0x00,0x00,0x0E,
      0x01,0xFF,0xFF,0xF8,0x00,0x4B,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xF0,0x8E,0x08,0x79,
      0x07,0xFF,0xFF,0xF0,0x00,0x41,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xE6,0xC0,0x07,0x61,
      0xC3,0xFF,0xFE,0xC0,0x00,0x00,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xED,0xEF,0x3F,
      0x83,0xFF,0xFE,0x60,0x00,0x00,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
      0xC0,0xFF,0xFD,0xFC,0x6C,0x00,0x3F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
      0xF0,0x7F,0xF3,0xFF,0xFE,0x60,0x3F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
      0xFF,0xFF,0xF3,0xFF,0xFF,0x50,0x1F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xC9,
      0xFB,0xFF,0xF1,0xF8,0x8C,0xD8,0x1F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFB,0x6F,0xD9,
      0xC2,0x3F,0xF8,0x40,0x00,0x00,0x1F,0xFF,0xFF,0xFF,0xFF,0xFF,0xF6,0xDF,0x1E,0xFF,
      0xFF,0x7F,0xFC,0x38,0x00,0x00,0x1F,0xFF,0xFF,0xFF,0xFF,0xFF,0x64,0x2F,0x6F,0xFF,
      0xFD,0x7B,0xFC,0x1F,0xE0,0x00,0x1F,0xFF,0xFF,0xFF,0xFF,0xFF,0x5F,0x7C,0xEE,0xFF,
      0xC7,0xFF,0xBC,0x0F,0xFF,0x00,0x03,0xFF,0xFF,0xFF,0xFF,0xFF,0xDF,0xFE,0xEF,0xFF,
      0xFF,0xE7,0xDC,0x07,0xE7,0xF8,0x12,0x7F,0xFF,0xFF,0xFF,0xFF,0x47,0xFF,0xFF,0xFF,
      0xFF,0xE7,0x80,0x03,0xF4,0x00,0x00,0x5F,0xFF,0xFF,0xFE,0xFE,0xE3,0xFF,0xFF,0xFF,
      0xFF,0xFE,0xC0,0x01,0xC0,0x00,0x00,0x1B,0xFF,0xFF,0xFB,0xFF,0xFF,0xFF,0xFF,0xFF,
      0x7F,0xEE,0xC0,0x00,0xC0,0x00,0x00,0x03,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
      0xFE,0x98,0x00,0x00,0x00,0x00,0x00,0x03,0xFF,0xFF,0xEF,0xFF,0xFF,0xFF,0xFF,0xFF,
      0x20,0x0E,0x60,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0x8F,0xFF,0xFF,0xFF,0xFF,0xFF,
      0x05,0x80,0xE0,0x00,0x00,0x00,0x00,0x01,0xFF,0xFD,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
      0x09,0x80,0xA0,0x00,0x00,0x00,0x00,0x01,0xFF,0xFF,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,
      0x85,0x2A,0xC0,0x00,0x00,0x00,0x00,0x01,0xFF,0xFB,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,
      0xBF,0xF3,0xC0,0x00,0x00,0x00,0x00,0x00,0xFF,0xF7,0xFF,0xFF,0xFF,0xFF,0xFF,0xF8,
      0xFF,0xFF,0x80,0x00,0x00,0x00,0x00,0x01,0xFF,0xE0,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,
      0xFF,0xFF,0x80,0x00,0x00,0x00,0x00,0x00,0xFF,0xC0,0xFF,0xFF,0xFF,0xFF,0xC0,0x1F,
      0xFF,0xFF,0x80,0x00,0x40,0x00,0x00,0x00,0xFF,0x80,0xFF,0xFF,0xFF,0x80,0x07,0xFF,
      0xFF,0xFF,0xC0,0x00,0xC0,0x00,0x00,0x01,0xFF,0x01,0xFF,0xFF,0xF8,0x00,0xFF,0xFF,
      0xFF,0xFF,0xE0,0x63,0x80,0x00,0x00,0x01,0xFE,0x01,0xFF,0x18,0x00,0x3F,0xFF,0xFF,
      0xFF,0xFF,0xFE,0x00,0x00,0x00,0x00,0x01,0xCC,0x01,0xFE,0x00,0x07,0xFF,0xFF,0xFF,
      0xFF,0xFF,0xFE,0x00,0x00,0x00,0x00,0x07,0xA0,0x03,0xFC,0x00,0xFF,0xFF,0xFF,0xFF,
      0xFF,0xFF,0xFE,0x00,0x00,0x00,0x00,0x05,0xC0,0x03,0xC8,0x00,0x7F,0xFF,0xFF,0xFF,
      0xFF,0xFF,0xFE,0x00,0x00,0x00,0x00,0x19,0x00,0x00,0x88,0x0C,0x07,0xFF,0xFF,0xFF,
      0xFF,0xFF,0xFC,0x00,0x0C,0x00,0x00,0x00,0x00,0x01,0x00,0x01,0xC0,0x7F,0xFF,0xFF,
      0xFF,0xFF,0xF8,0x07,0x0F,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x0F,0xFF,0xFE,
      0xFF,0xFF,0xD0,0x07,0xFF,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x03,0xFF,0xF8,
      0xFF,0xFC,0x00,0x00,0x60,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3F,0xFF,0xC0,
      0xFF,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x20,0x00,0x00,0x00,0x00,0xFF,0xF8,
      0xFF,0xE0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x1F,0xFE,
      0xFF,0xC0,0x00,0x00,0x00,0x00,0x00,0x78,0x02,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,
      0xFF,0x00,0x00,0x00,0x00,0x00,0x03,0xF0,0x78,0x00,0x00,0x00,0x00,0x00,0x02,0xFF,
      0xFE,0x00,0x00,0x00,0x00,0x00,0x1F,0xFF,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x7F,
      0xF0,0x00,0x00,0x00,0x00,0x00,0x7F,0xFF,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x1F,
      0xE0,0x00,0x00,0x00,0x00,0x00,0x3F,0xFF,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x1F,
      0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x27,
      0xC0,0x00,0x00,0x00,0x00,0x00,0x01,0xFC,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,
      0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,
      0x80,0x00,0x00,0x00,0x00,0x00,0x08,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01
};

void set12864();
void setxy(uchar x,uchar y);
void write_command(uchar command);
void write_16byte(uint data_add);
void delays(uchar count);

void main()
{
    uchar x,y,i;
    while(1)
    {
        y="0x80";                     //设置液晶上半部分坐标
        x="0x80";
        delays(2);                  //延时2s
        set12864();                 //初始化12864
        delays(2);
        for(i=0;i<32;i++)           //写入液晶上半图象部分
        {                           //写入坐标
            setxy(x,y);
            write_16byte(i*16);     //连续写入16字节数据
            y++;                    //y轴地址加1
        }
        y="0x80";                     //设置液晶下半部分坐标
        x="0x88";
        for(i=0;i<32;i++)           //写入液晶下半图象部分
        {
            setxy(x,y);             //写入坐标
            write_16byte((32+i)*16);//连续写入16字节数据
            y++;                    //y轴地址加1
        }
        write_command(0x34);        //写入扩充指令命令
        write_command(0x36);        //显示图象
    }
}

//设置绘图坐标
void setxy(uchar x,uchar y)
{
    write_command(0x34);        //写入扩充指令命令
    write_command(y);           //写入y轴坐标
    write_command(x);           //写入x轴坐标
    write_command(0x30);        //写入基本指令命令
}

void write_16byte(uint data_add)
{
    bit flag="1";                 //12864空闲标志位
    uchar num="16";               //16个循环,连续写入16个字节
    for(;num>0;num--)
    {
        while(flag)             //检查12864是否空闲
            flag="XBYTE"[comre]&0x80;
        XBYTE[datawr]=disp_data[data_add++]; //空闲传送数据
    }
}

//延时count秒子程序
void delays(uchar count)
{
    unsigned char h,i,j,k;
    do
    {
    for(h=5;h>0;h--)
    for(i=4;i>0;i--)
    for(j=116;j>0;j--)
    for(k=214;k>0;k--);
    }while(--count);
}

这是CM12864－20SLYA芯片资料，这是汉字图象取模软件

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文章评论（10条评论）

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用户227870 2011-7-27 09:48

还有DBYTE[data_add++]=XBYTE[datare]; //空闲传送数据，您这个数据是读到哪里去了，您用DBYTE来干什么，按您的程序来看是把数据读到了内部RAM 30H开始的地址处，这个函数有什么意义呢？？抱歉，打扰了。我也是一个单片机初学者，看到您的程序，感觉比一般按照时序写的程序要高效，所以希望探讨一下！！忘指教！！

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用户227870 2011-7-27 09:39

还有一个问题就是你的flag="XBYTE"[comre]&0x80;这句话，XBYTE为什么要打上双引号，而XBYTE[datawr]=disp_data[data_add++]; //空闲传送数据,而这句话的XBYTE却没有双引号，对于外部寻址中的关键字XBYTE打双引号与不打双引号有什么区别呢？？？？

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用户227870 2011-7-27 09:35

您好，对于你的这个程序我有几个问题请教一下！！您这个程序应该是采用一种类似外部RAM扩展的方式来读写12864的吧！！这样的话是不是P0口不能够接上拉电阻，您电路中有没有接上拉电阻？上拉电阻会不会影响到数据读写。还有就是您既然是外部扩展方式，P0口始终是作为数据/地址复用总线使用的（本来应该是通过ALE进行选择的，但是您的电路中P0口没有充当地址功能，但是在写入地址的时候P0口是不是还是会有数据送出的），当写入地址的时候P0口的数据对12864没有影响吗？？外部RAM扩展方式的读写操作还应该受单片机的读写使能RD/WR控制的，而实际上您的电路应该没有受RD/WR控制，这样对读写数据没有影响吗？？ 12864时序图中的数据读或写都是通过E的下降沿有效的（在下降沿的时候数据读入或者写出），而看您的程序应该一直是吧E引脚对应的地址为写1，这样可以吗？？我测试您的程序好像没有显示，但是我感觉这种方式操作12864应该比传统时序控制方式更高效，特由此疑问，忘指导！！！

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