2009
07.16

12864液晶显示器(ST7920)显示程序(并口) 附字模软件

分类: 单片机, 电子设计 / 标签: , , ,  / 10 个回复

前两天写了一个ST7920控制12864显示的串口程序，今天瞎逛的时候发现了这个超强悍的并口程序，转载一下。来源：CnChina

做了比较详细的注释，看不懂的可以问我。下面的图片中12864所显示的logo就是我用这个程序得到的。

未命名

附程序：

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/******************************************************************************
Copyright 2007 
All rights reserved.
文件名 ： .c
模块名称：st7920 并行方式驱动12864液晶驱动
功能概要：st7920显示驱动
取代版本：0.0.1
修改人 ：pulan
完成日期：2007.07.08
升级说明：create
CPU: stc89c58   主频：11.0592M
液晶型号：128*64       生产厂家：        驱动芯片：st7920
******************************************************************************/
#include <reg52.h>
#define uint  unsigned int
#define uchar unsigned char
#define x1    0x80			//1000 0000
#define x2    0x88			//1000 1000
#define y     0x80			//1000 0000
#define comm  0				//定义传送指令代码为0
#define dat   1				//定义传送数据代码为1
sbit RS = P2^0;				//H=数据; L=指令;
sbit RW = P2^1;				//H=读操作; L=写操作;
sbit  E = P2^3;				//使能端
sbit PSB= P2^4;				//H=并口; L=串口;
sbit RST= P2^2;				//复位信号 低电平有效
sbit busy=P0^7;				//LCD忙信号
void wr_lcd (uchar dat_comm,uchar content);
void chk_busy (void);
void delay (uint us);
uchar code tab1[]={
"本系列中文模块内"
"任意位置反白显示"
"置二级字库，可在"
"使用更方便更灵活"
};
uchar code tab31[]={
"金鹏科技有限公司"
"Golden Palm TECH"
};
uchar code tab32[]={
/*--  调入了一幅图像：F:\梁\画图\HOCO12832.bmp  --*/
/*--  宽度x高度=128x32  --*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x1E,0x00,0x00,0x00,0x00,0x00,0x07,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x7F,0x80,0x00,0x00,0x00,0x00,0x18,0x0C,0x00,0x00,0x01,0x00,0x00,0x00,0x00,
0x01,0xFF,0x80,0x00,0x00,0x00,0x00,0x20,0x00,0x00,0x00,0x13,0x10,0x03,0xFE,0x00,
0x03,0xFF,0xC0,0x00,0x00,0x00,0x00,0x58,0x00,0x00,0x00,0x3F,0x30,0x1F,0xFF,0xC0,
0x03,0xFF,0xE0,0x00,0x00,0x00,0x00,0x8C,0x03,0xF0,0x00,0x7F,0xE0,0x7C,0x01,0xE0,
0x03,0xFF,0xF0,0x00,0x00,0x00,0x01,0x36,0x06,0xC0,0x00,0x5F,0xC0,0xFF,0xFC,0x60,
0x01,0xFF,0xF0,0x00,0x00,0x00,0x02,0x1B,0x0F,0x80,0x00,0xFF,0x01,0xFE,0x0F,0x30,
0x00,0xEF,0xF0,0x00,0x00,0x00,0x02,0x6D,0x9F,0x00,0x00,0x3E,0x03,0xFF,0xF1,0x90,
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0x00,0xEF,0xFF,0xFF,0x80,0x00,0x04,0xDB,0x7E,0x00,0x03,0xFF,0x87,0xFF,0xFC,0xD0,
0x00,0x0F,0xFF,0xFF,0xC0,0x00,0x04,0x6D,0xFC,0x00,0x07,0xFF,0x8F,0xFF,0xFE,0x50,
0x00,0x0F,0xFF,0xFF,0xE0,0x00,0x04,0x36,0xFC,0x10,0x07,0xFF,0x8F,0xFF,0xFE,0x90,
0x00,0x0F,0xFF,0xFF,0xE0,0x00,0x04,0x1B,0xF8,0x10,0x07,0xFF,0xCF,0xFF,0xFE,0x80,
0x00,0x0F,0xFF,0xFF,0xF0,0x00,0x04,0x0F,0xF8,0x10,0x07,0xFF,0xFF,0xFF,0xFA,0x00,
0x00,0x07,0xFF,0xFF,0xF0,0x00,0x04,0x07,0xF0,0x10,0x07,0xFF,0xFF,0xFF,0xFA,0x00,
0x00,0xFF,0xFF,0xFF,0xF8,0x00,0x02,0x03,0xF0,0x20,0x07,0xFF,0xFF,0xFF,0xBA,0x00,
0x00,0xFD,0xFF,0xFF,0xFC,0x00,0x02,0x03,0xF0,0x20,0x03,0xFF,0xFF,0xDF,0xB8,0x00,
0x00,0xC1,0xC0,0x3F,0xFC,0x00,0x01,0x01,0xE0,0x40,0x00,0xFF,0xFF,0xDF,0xB0,0x00,
0x00,0x81,0xC0,0x3F,0xCE,0x00,0x00,0x81,0xE0,0x80,0x00,0x7F,0xFF,0xDF,0xA0,0x00,
0x00,0x81,0x80,0x1D,0xCF,0x00,0x00,0x41,0xE1,0x00,0x00,0x3F,0xFF,0x9B,0x00,0x00,
0x01,0x83,0x80,0x1F,0xC7,0x80,0x00,0x21,0xE2,0x00,0x00,0x1F,0xFD,0xB6,0x00,0x00,
0x01,0xC3,0x00,0x0E,0xE6,0x80,0x00,0x19,0xEC,0x00,0x00,0x07,0xFE,0x20,0x00,0x00,
0x00,0xC3,0x00,0x07,0x67,0x40,0x00,0x07,0xF0,0x00,0x00,0x03,0x3E,0x00,0x00,0x00,
0x00,0x02,0x00,0x03,0xE7,0xA0,0x00,0x00,0x00,0x00,0x00,0x02,0x8E,0x00,0x00,0x00,
0x00,0x06,0x00,0x03,0x83,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x03,0x00,0x00,0x00,
0x00,0x06,0x00,0x07,0x03,0x00,0x77,0x46,0x74,0x24,0x80,0x06,0x04,0x00,0x00,0x00,
0x00,0x1C,0x00,0x06,0x00,0x00,0x55,0x45,0x54,0x57,0x80,0x00,0x00,0x00,0x00,0x00,
0x00,0x1C,0x00,0x0E,0x00,0x00,0x45,0x45,0x74,0x57,0x80,0x08,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x1C,0x00,0x00,0x55,0x45,0x44,0x74,0x80,0xF0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x38,0x00,0x00,0x77,0x76,0x47,0x54,0x80,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};
uchar code tab5[]={
/*--  调入了一幅图像：F:\梁\画图\COCK.bmp  --*/
/*--  宽度x高度=128x64  --*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x80,0x00,0x0F,0xFF,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x0C,0x43,0x01,0x80,0x00,0x7F,0xFF,0xF0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x19,0xFF,0x07,0x00,0x07,0xFF,0xFF,0xFE,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x01,0x3F,0xFC,0x1E,0x00,0x1F,0xFF,0xFF,0xFF,0x80,0x00,0x00,0x00,
0x00,0x00,0x00,0x01,0xBF,0xFF,0xFC,0x00,0x7F,0xFC,0x00,0x7F,0xC0,0x00,0x00,0x00,
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0x00,0x00,0x00,0x03,0xFF,0xFF,0x00,0x0F,0xFF,0xFF,0xFF,0xE0,0x38,0x00,0x00,0x00,
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0x00,0x00,0x00,0x0F,0xFF,0xFC,0x00,0xFF,0xFF,0xFF,0xFF,0x87,0x08,0x00,0x00,0x00,
0x00,0x00,0x00,0x1F,0xFF,0xFE,0x00,0xFF,0xFF,0xFF,0xFF,0x83,0x88,0x00,0x00,0x00,
0x00,0x00,0x00,0x3F,0xFF,0xFE,0x01,0xFF,0xFF,0xFF,0xFF,0xC3,0x88,0x00,0x00,0x00,
0x00,0x00,0x00,0x7F,0xFF,0xFE,0x01,0xFF,0xFF,0xFF,0xFF,0xE1,0x88,0x00,0x00,0x00,
0x00,0x00,0x00,0xFF,0xFF,0xFE,0x03,0xFF,0xFF,0xFF,0xFF,0xE1,0x88,0x00,0x00,0x00,
0x00,0x00,0x01,0xFF,0xFF,0xFE,0x03,0xFF,0xFF,0xFF,0xFF,0xF1,0x88,0x00,0x00,0x00,
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0x00,0x00,0x01,0xFF,0xFF,0xFF,0x07,0xFF,0xFF,0xFF,0xFF,0xF2,0x10,0x00,0x00,0x00,
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0x00,0x00,0x01,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xF0,0x00,0x00,0x00,0x00,
0x00,0x00,0x01,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x70,0x00,0x00,0x00,0x00,
0x00,0x00,0x01,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xFF,0x70,0x00,0x00,0x00,0x00,
0x00,0x00,0x01,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xFF,0x70,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0xFF,0x7F,0x20,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xBF,0xFF,0x7F,0x20,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x7F,0xFF,0xFF,0xFF,0xFF,0xDF,0xFF,0x7E,0x20,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x3F,0xFF,0xFF,0xFF,0xFF,0xDF,0xFF,0x3E,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x1F,0xFF,0xFF,0xFF,0xFF,0xCF,0xFF,0x3C,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0F,0xFF,0xFF,0xFF,0xFF,0xCF,0xFE,0x38,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x07,0xFF,0xFF,0xFF,0xFF,0x8F,0xFE,0x38,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x01,0xFF,0xFF,0xFF,0xFF,0x8F,0xFE,0x30,0x40,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x01,0xFF,0xFF,0xF1,0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x70,0x00,0xE0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x60,0x00,0x78,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0xC0,0x03,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x01,0x40,0x04,0xD8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x01,0x00,0x01,0x08,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x02,0x0C,0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x02,0x40,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x0C,0x48,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x38,0x41,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x0F,0xE2,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};
 
/******************************************************************************************
* 函数名称    ：init_lcd
* 功能描述    ：初始化LCD
******************************************************************************************/
void init_lcd (void)
{
   RST = 1;
   PSB = 1;
   wr_lcd(comm,0x30);	//0011 0000 扩充功能设定——8位数据 基本指令操作 
   wr_lcd(comm,0x01);	//0000 0001 清屏——将DDRAM填满"20H",并且设定DDRAM的地址计数器为"00H"
   wr_lcd(comm,0x06);	//0000 0110 进入点设定——指定在数据的读取与写入时,设定游标的移动方向
   wr_lcd(comm,0x0c);	//0000 1100 游标或显示移位控制——开显示，关游标
}
/******************************************************************************************
* 函数名称    ：chn_disp
* 功能描述    ：显示汉字或字符
******************************************************************************************/
void chn_disp(uchar code *chn)
{
   uchar i,j;				//i为横坐标,j为纵坐标
   wr_lcd(comm,0x30);			//0011 0000 扩充功能设定——8位数据 基本指令操作 
   wr_lcd(comm,0x80);			//1000 0000 设定DDRAM地址——0000000
   for(j=0;j<4;j++)			//写四行数据
   {
     for(i=0;i<16;i++)
     wr_lcd(dat,chn[j*16+i]);
   }
}
/******************************************************************************************
* 函数名称    ：chn_disp1
* 功能描述    ： 上半屏显示汉字或字符
******************************************************************************************/
void chn_disp1(uchar code *chn)
{
   uchar i,j;
   wr_lcd(comm,0x30);			//0011 0000 扩充功能设定——8位数据 基本指令操作
   wr_lcd(comm,0x80);			//1000 0000 设定第一行的DDRAM地址——0x80
   j=0;					//第一行
   for(i=0;i<16;i++)
   wr_lcd(dat,chn[j*16+i]);
   wr_lcd(comm,0x90);			//1001 0000 设定第二行的DDRAM地址——0x90
   j=1;					//第二行
   for(i=0;i<16;i++)
   wr_lcd(dat,chn[j*16+i]);
}
/******************************************************************************************
* 函数名称    ：img_disp
* 功能描述    ：显示图形
******************************************************************************************/
void img_disp(uchar code *img)
{
   uchar i,j;
   for(j=0;j<32;j++)			//绘制上半屏
   {
     for(i=0;i<8;i++)
     {
       wr_lcd(comm,0x34);		//0011 0100 扩充功能设定——8位数据 扩充指令操作 绘图开
       wr_lcd(comm,y+j);		//1xxx xxxx 设定绘图RAM——先设定垂直(列)地址AC6 AC5…AC0
       wr_lcd(comm,x1+i);		//1000 0xxx 设定绘图RAM——再设定水平(行)地址AC3AC2AC1AC0
       wr_lcd(comm,0x30);		//0011 0000 扩充功能设定——8位数据 基本指令操作
       wr_lcd(dat,img[j*16+i*2]);
       wr_lcd(dat,img[j*16+i*2+1]);
     }
   }
   for(j=32;j<64;j++)			//绘制下半屏
   {
     for(i=0;i<8;i++)
     {
       wr_lcd(comm,0x34);		//0011 0100 扩充功能设定——8位数据 扩充指令操作 绘图开
       wr_lcd(comm,y+j-32);		//1xxx xxxx 设定绘图RAM——先设定垂直(列)地址AC6 AC5…AC0
       wr_lcd(comm,x2+i);		//1000 1xxx 设定绘图RAM——再设定水平(行)地址AC3AC2AC1AC0
       wr_lcd(comm,0x30);		//0011 0000 扩充功能设定——8位数据 基本指令操作
       wr_lcd(dat,img[j*16+i*2]);
       wr_lcd(dat,img[j*16+i*2+1]);
     }
   }
   wr_lcd (comm,0x36);			//0011 0110 扩充功能设定——8位数据 扩充指令操作 绘图关
}
/******************************************************************************************
* 函数名称    ：img_disp1
* 功能描述    ：下半屏显示图形
******************************************************************************************/
void img_disp1(uchar code *img)
{
   uchar i,j;
   for(j=0;j<32;j++)
   {
     for(i=0;i<8;i++)
     {
       wr_lcd(comm,0x34);
       wr_lcd(comm,y+j);
       wr_lcd(comm,x2+i);
       wr_lcd(comm,0x30);
       wr_lcd(dat,img[j*16+i*2]);
       wr_lcd(dat,img[j*16+i*2+1]);
     }
   }
   wr_lcd(comm,0x36);
}
/******************************************************************************************
* 函数名称    ：lat_disp
* 功能描述    ：显示点阵
******************************************************************************************/
void lat_disp(uchar data1,uchar data2)
{
   uchar i,j,k,x;
   x=x1;				//1000 0000
   for(k=0;k<2;k++)			//第一次循环x=1000 0000 第二次循环x=1000 1000
   {
     for(j=0;j<16;j++)
     {
       for(i=0;i<8;i++)
       {
         wr_lcd(comm,0x34);		//0011 0100 扩充功能设定——8位数据 扩充指令操作 绘图开
         wr_lcd(comm,y+j*2);
         wr_lcd(comm,x+i);
         wr_lcd(comm,0x30);
         wr_lcd(dat,data1);
         wr_lcd(dat,data1);
       }
       for(i=0;i<8;i++)
       {
         wr_lcd(comm,0x34);
         wr_lcd(comm,y+j*2+1);
         wr_lcd(comm,x+i);
         wr_lcd(comm,0x30);
         wr_lcd(dat,data2);
         wr_lcd(dat,data2);
       }
     }
     x=x2;
   }
   wr_lcd(comm,0x36);
}
/******************************************************************************************
* 函数名称    ：con_disp
* 功能描述    ：当data1=0xff,data2=0xff时,在x0,y0处反白显示16xl*yl
******************************************************************************************/
void con_disp(uchar data1,uchar data2,uchar x0,uchar y0,uchar xl,uchar yl)
{
   uchar i,j;
   for(j=0;j<yl;j++)
   {
     for(i=0;i<xl;i++)
     {
       wr_lcd(comm,0x34);
       wr_lcd(comm,y0+j);
       wr_lcd(comm,x0+i);
       wr_lcd(comm,0x30);
       wr_lcd(dat,data1);
       wr_lcd(dat,data2);
     }
   }
   wr_lcd(comm,0x36);
}
/******************************************************************************************
* 函数名称    ：clrram
* 功能描述    ：将DDRAM填满"20H",并且设定DDRAM的地址计数器(AC)到"00H"
******************************************************************************************/
void clrram(void)
{
   wr_lcd(comm,0x30);
   wr_lcd(comm,0x01);
}
/******************************************************************************************
* 函数名称    ：wr_lcd
* 功能描述    ：当dat_comm=0时,写入指令,dat_comm=1时,写入数据
******************************************************************************************/
void wr_lcd(uchar dat_comm,uchar content)
{
   chk_busy ();
   if(dat_comm)
    {
     RS = 1;				//数据
     RW = 0;				//写
    }
   else 
    {
     RS = 0;				//指令
     RW = 0;				//写
    }
   P0=content;				//输出数据或指令
   E = 1;
   E = 0;
}
/******************************************************************************************
* 函数名称    ：chk_busy
* 功能描述    ：检测LCD忙信号
******************************************************************************************/
void chk_busy(void)
{
   P0 = 0xff;
   RS = 0;
   RW = 1;
   E = 1;
   while(busy==1);
   E = 0;
}
/******************************************************************************************
* 函数名称    ：delay
* 功能描述    ：延时函数
******************************************************************************************/
void delay(uint us)   //delay time
{
   while(us--);
}
/******************************************************************************************
* 函数名称    ：delay1
* 功能描述    ：延时函数 1ms
******************************************************************************************/
void delay1(uint ms)
{
   uint i,j;
   for(i=0;i<ms;i++)
   for(j=0;j<15;j++)
   delay(1);
}
/******************************************************************************************
* 函数名称    ：main
* 功能描述    ：主函数
******************************************************************************************/
void main()
{
   SP=0x5f;
   init_lcd();
   while(1)
   {
     lat_disp(0x00,0x00);		//显示点阵
     chn_disp(tab1);			//整屏显示汉字或字符
     con_disp(0xff,0xff,0x8c,0x80,2,16);//反白
     delay1(8000);
     clrram();				//清屏
     lat_disp(0xcc,0xcc);		//显示点阵
     delay1(8000);
     lat_disp(0x00,0x00);		//显示点阵
     chn_disp1(tab31);			//上半屏显示字符
     img_disp1(tab32);			//下半屏显示图像
     delay1 (8000);
     clrram();
     lat_disp (0xff,0x00);		//显示点阵
     delay1(8000);
     img_disp(tab5);			//整屏显示图像
     delay1(8000);
   }
}

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