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汉字点阵滚动指示牌
[LED显示屏] 2008-06-17

作者：周兴华       整理：单片东东

2008-6-4 晚 24：00

 

目前我们经常见到的指示牌，大多为静态型的（如马路路牌、宾馆或医院里的禁止吸烟牌等），有些还没有发光功能，夜晚或光线暗淡的环境下人们就看不到了。最重要的是，静态型指示牌的信息容量非常有限，仅能显示简单的图案或几个字符。而我们这里介绍的“汉字点阵滚动指示牌”，设计先进，显示活泼，可动态滚动显示多达40个字符或图案（使用单片机AT89C2051），若将单片机型号改为AT89C4051，则显示的字符数超过100个。读者通过实际制作调试，可以学会利用单片机进行汉字点阵的扫描显示及控制。

电路原理

汉字点阵指示牌电路见图1，这里为两个汉字的显示电路。

图1

IC1~IC8（74HC595）为带锁存的8 位串入并出移位寄存器，它们负责将单片机（AT89C2051）发送的串行数据转换为并行数据，并驱动点阵发光管的列线X1~X16。图1中仅画出一个汉字的点阵屏，由四个8x8点阵管LED2088BX（LED1~LED4）构成，行线为Y1~Y16，列线为X1~X16。另一个汉字的点阵屏构成也一样，只是行线为Y1~Y16，列线为X33~X64。IC12 为单片机控制器，负责发送数据点亮点阵屏并控制汉字左移滚动。IC12 的OSER、OSCLK、ORCLK 用于将列扫描数据串行输出，通过74HC595 进行高速串-并转换。而IC12的OIA~OID 则为四位行数据线输出，经IC9、IC10（两个3-8线译码器74HC138构成一个4-16 线译码器）译码后驱动T1~T16 共16 个PNP大功率管作行驱动。IC12 的KEY1~KEY3 端可外接三个功能按键，进行一些应用中的功能选择。由于我们这里仅将此系统作为一个汉字滚动指示牌使用，因此并未使用这些按键。实际使用时若觉得两个字的指示牌不够长，也可从级连控制信号输出口进行扩展，如扩展成4 个字或6 个字的汉字指示牌等。

图2 为74HC595的逻辑结构图。74HC595 由一个8位串行移位寄存器和一个带3态并行输出的8 位D 型锁存器所构成。该移位寄存器接收串行数据和提供串行输出，同时移位寄存器还向8 位锁存器提供并行数据。移位寄存器和锁存器具有单独的时钟输入端。该器件还有一个用于移位寄存器的异步复位端。图2

74HC595 的引脚功能说明：14 脚为串行数据输入端。11 脚为移位时钟输入端，该端在脉冲上升沿时使串行输入端的数据移入8 位移位寄存器。10 脚为复位端，低电平有效，该端的低电平仅使该器件的移位寄存器部分复位，8位锁存器不受影响。12脚为锁存时钟输入端，该输入端在脉冲上升沿时将移位寄存器数据锁存起来。13 脚为输出允许端，该端为低电平时允许锁存器数据出现在输出端（QA~QH），该端为高电平时迫使输出端呈高阻态。串行输出不受该控制端的影响。15、1~7 脚为同相/三态/锁存输出端。9 脚为同相/串行数据输出端，这是8 位移位寄存器中的第8 级的输出端，该端无三态能力。

软件设计思路及方案

编程思路为：1.先对相关变量进行初始化。2.循环扫描点亮16 行LED（称点亮一帧图像）。3.一帧图像扫描完毕后，列指针向右移动1 位，再扫描下一帧图像。为了控制汉字滚动的速度，有时候要对一帧图像扫描数次后才将列指针移位。……依次类推，列指针共向右移动16 位。这样，主观上感觉到图像向左滚（移）动。4.移动一个汉字（列指针右移16 位）后，字指针指向下一个汉字。再重复2~4 过程。这样，我们就能在显示屏上看到持续不断的滚动汉字信息了。

图3 为主程序状态流程。

图3

完整的程序见本刊配刊光盘。

汉字点阵码的生成需借助专用软件，这类软件网上很多，读者朋友可自行搜索下载。这里我们提供一个Zimo21 取字模软件供大家参考。该软件不仅可取汉字的字模，也可对图像取模，因此，我们的这个“汉字点阵指示牌”不仅可滚动显示汉字，也可显示动画图案，增添了显示的乐趣。该“汉字点阵指示牌”使用5V/1A的开关稳压电源供电。

主程序

初始化

 

根据行指针

disrow，循环扫描

16 行，点亮16 行LED

列指针col 递增1

位，共递增16位

字指针word 指向

下一个汉字

（word=word+32）

 

 

 

#include <AT892051.H>
#define uchar unsigned char
#define uint unsigned int
#define SPEED 3
uchar col,disrow;
uint word;
uchar code HZ[];
uchar BUFF[6];
void loadoneline(void);
void sendoneline(void);
/********************************************/
uchar two_onebyte(uchar h1,uchar h2)
{
uchar temp,tempcol;
if(col<8) tempcol=col;
else tempcol=col-8;
temp=(h1<<tempcol)|(h2>>(8-tempcol));
temp=255-temp;
return temp;
}
/*******************************************************/
void main(void)
{
uchar i;
col=0;word=0;
while(1)
{
 while(col<16)
 {
  for(i=0;i<SPEED;i++)
  {
   for(disrow=0;disrow<16;disrow++)
   {
   loadoneline();
   sendoneline();
   P1=0x10+disrow;
   P1=0x20+disrow;
   }
  }
 col++; 
 }
col=0;word=word+32;
if(word>=1600)word=0;
}
}
/******************************************************/
void loadoneline(void)
{
uchar s;
 for(s=0;s<3;s++)
 {
 BUFF[2*s]=HZ[word+32*s+2*disrow];
 BUFF[2*s+1]=HZ[word+1+32*s+2*disrow];
 }
}
/******************************************************/
void sendoneline(void)
{
char s;uchar inc;
if(col<8)inc=0;else inc=1;
 for(s=4+inc;s>=0+inc;s--)
 {
 SBUF=two_onebyte(BUFF[s],BUFF[s+1]);
 while(!TI);TI=0;
 }
}
/*******************************************************/
uchar code HZ[]=
{
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
//=============================================================================
0x00,0x08,0x00,0x12,0x00,0x24,0x00,0x48,0x00,0x90,0x01,0x20,0x02,0x40,0x04,0x80,
0x02,0x40,0x01,0x20,0x00,0x90,0x00,0x48,0x00,0x24,0x00,0x12,0x00,0x08,0x00,0x04,/*"《",0*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFE,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*"—",1*/
0x00,0x08,0x00,0x12,0x00,0x24,0x00,0x48,0x00,0x90,0x01,0x20,0x02,0x40,0x04,0x80,
0x02,0x40,0x01,0x20,0x00,0x90,0x00,0x48,0x00,0x24,0x00,0x12,0x00,0x08,0x00,0x04,/*"《",2*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFE,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*"—",3*/
0x00,0x08,0x00,0x12,0x00,0x24,0x00,0x48,0x00,0x90,0x01,0x20,0x02,0x40,0x04,0x80,
0x02,0x40,0x01,0x20,0x00,0x90,0x00,0x48,0x00,0x24,0x00,0x12,0x00,0x08,0x00,0x04,/*"《",4*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFE,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,/*"—",5*/
//**************************************************************************
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
/****************************************************************************/
0x08,0x20,0x06,0x30,0x04,0x40,0x3F,0xF8,0x21,0x08,0x3F,0xF8,0x21,0x08,0x21,0x08,
0x3F,0xF8,0x21,0x08,0x01,0x00,0xFF,0xFE,0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x00,/*"单",0*/
0x00,0x40,0x10,0x40,0x10,0x40,0x10,0x44,0x1F,0xFE,0x10,0x00,0x10,0x00,0x10,0x00,
0x1F,0xF0,0x10,0x10,0x10,0x10,0x10,0x10,0x20,0x10,0x20,0x10,0x40,0x10,0x80,0x10,/*"片",1*/
0x10,0x00,0x10,0xF8,0x10,0x88,0xFE,0x88,0x10,0x88,0x10,0x88,0x38,0x88,0x34,0x88,
0x54,0x88,0x50,0x88,0x91,0x08,0x11,0x0A,0x12,0x0A,0x12,0x0A,0x14,0x06,0x10,0x00,/*"机",2*/
0x00,0x00,0x0F,0xF0,0x08,0x10,0x0F,0xF0,0x08,0x10,0x0F,0xF0,0x08,0x10,0x0F,0xF0,
0x08,0x10,0x08,0x10,0xFF,0xFE,0x04,0x00,0x06,0x20,0x0C,0x10,0x10,0x18,0x20,0x08,/*"具",3*/
0x01,0x00,0x01,0x00,0x7F,0xFE,0x02,0x00,0x04,0x00,0x0F,0xF0,0x18,0x10,0x28,0x10,
0x4F,0xF0,0x88,0x10,0x08,0x10,0x0F,0xF0,0x08,0x10,0x08,0x90,0x08,0x70,0x08,0x20,/*"有",4*/
0x10,0x40,0x18,0x40,0x10,0x40,0x20,0x40,0x37,0xFC,0x60,0xC0,0xA0,0xE0,0x21,0x60,
0x21,0x50,0x22,0x48,0x24,0x4E,0x2B,0xF4,0x20,0x40,0x20,0x40,0x20,0x40,0x00,0x00,/*"体",5*/
0x0C,0x00,0x71,0xFC,0x11,0x04,0x11,0x04,0xFD,0x04,0x11,0x04,0x39,0x04,0x35,0x04,
0x55,0xFC,0x50,0x00,0x90,0x90,0x10,0x88,0x11,0x04,0x11,0x06,0x12,0x02,0x14,0x02,/*"积",6*/
0x01,0x00,0x01,0x00,0x01,0x00,0x01,0x00,0x09,0x40,0x0D,0x20,0x19,0x10,0x11,0x18,
0x21,0x0C,0x41,0x06,0x81,0x04,0x01,0x00,0x01,0x00,0x01,0x00,0x05,0x00,0x02,0x00,/*"小",7*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x00,0x30,0x00,0x10,0x00,0x00,0x00,0x00,0x00,/*"、",8*/
0x00,0x20,0x00,0x20,0x7F,0x20,0x08,0x20,0x0B,0xFC,0x08,0x24,0x08,0x24,0x08,0x44,
0x09,0x44,0x0E,0x44,0xF0,0x84,0x40,0x84,0x01,0x04,0x02,0x78,0x04,0x10,0x00,0x00,/*"功",9*/
0x20,0x40,0x30,0x40,0x24,0x4C,0x42,0x70,0xFF,0x44,0x42,0x46,0x00,0x7C,0x7E,0x00,
0x42,0x40,0x7E,0x4C,0x42,0x70,0x7E,0x40,0x42,0x44,0x42,0x46,0x4A,0x3C,0x44,0x00,/*"能",10*/
0x00,0x00,0x79,0xF8,0x09,0x08,0x09,0x08,0x79,0xF8,0x40,0x40,0x43,0xFC,0x42,0x44,
0x7A,0x44,0x0A,0x44,0x0B,0xFC,0x08,0x40,0x08,0x48,0x08,0x44,0x28,0x7E,0x13,0xC4,/*"强",11*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x00,0x30,0x00,0x10,0x00,0x00,0x00,0x00,0x00,/*"、",12*/
0x01,0x00,0x00,0x80,0x3F,0xFC,0x20,0x00,0x22,0x00,0x21,0x08,0x30,0x8C,0x28,0xC8,
0x24,0x90,0x24,0x90,0x26,0x20,0x44,0x20,0x40,0x40,0x5F,0xFE,0x80,0x00,0x00,0x00,/*"应",13*/
0x00,0x00,0x1F,0xFC,0x10,0x84,0x10,0x84,0x10,0x84,0x1F,0xFC,0x10,0x84,0x10,0x84,
0x10,0x84,0x1F,0xFC,0x10,0x84,0x10,0x84,0x20,0x84,0x20,0x84,0x40,0x94,0x80,0x88,/*"用",14*/
0x00,0x00,0x7F,0xFE,0x02,0x00,0x04,0x00,0x3F,0xFC,0x24,0x44,0x24,0x44,0x27,0xC4,
0x24,0x44,0x24,0x44,0x27,0xC4,0x24,0x44,0x24,0x44,0x3F,0xFC,0x20,0x04,0x00,0x00,/*"面",15*/
0x01,0x00,0x00,0x80,0x3F,0xFE,0x20,0x00,0x20,0x00,0x20,0x00,0x20,0x00,0x20,0x00,
0x20,0x00,0x20,0x00,0x20,0x00,0x20,0x00,0x40,0x00,0x40,0x00,0x80,0x00,0x00,0x00,/*"广",16*/
0x20,0x80,0x3E,0xFC,0x28,0xA0,0x45,0x10,0x85,0x10,0x3F,0xF8,0x01,0x00,0xFF,0xFE,
0x00,0x20,0x00,0x20,0x7F,0xFC,0x04,0x20,0x02,0x20,0x02,0x20,0x00,0xA0,0x00,0x40,/*"等",17*/
0x10,0x80,0x18,0xA0,0x10,0x98,0x20,0x90,0x37,0xFC,0x61,0x40,0xA1,0x40,0x21,0x40,
0x21,0x40,0x21,0x40,0x21,0x40,0x22,0x44,0x22,0x44,0x24,0x46,0x28,0x3C,0x20,0x00,/*"优",18*/
0x01,0x00,0x01,0x00,0x01,0xF8,0x01,0x00,0x01,0x10,0x1F,0xF8,0x10,0x10,0x10,0x10,
0x10,0x10,0x1F,0xF0,0x10,0x10,0x01,0x10,0x28,0x88,0x24,0x44,0x44,0x44,0x00,0x00,/*"点",19*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x00,0x30,0x00,0x10,0x00,0x20,0x00,0x00,0x00,/*"，",20*/
0x00,0x00,0x1F,0xF8,0x10,0x08,0x10,0x08,0x10,0x08,0x1F,0xF8,0x10,0x08,0x10,0x08,
0x10,0x08,0x1F,0xF8,0x10,0x08,0x10,0x08,0x10,0x08,0x1F,0xF8,0x10,0x08,0x00,0x00,/*"目",21*/
0x08,0x10,0x06,0x18,0x04,0x20,0xFF,0xFE,0x00,0x00,0x3E,0x08,0x22,0x48,0x3E,0x48,
0x22,0x48,0x22,0x48,0x3E,0x48,0x22,0x48,0x22,0x48,0x2A,0x08,0x24,0x28,0x00,0x10,/*"前",22*/
0x00,0x00,0x7F,0xFE,0x00,0x80,0x00,0x80,0x00,0x80,0x00,0x80,0x10,0x80,0x10,0xFC,
0x10,0x80,0x10,0x80,0x10,0x80,0x10,0x80,0x10,0x80,0xFF,0xFE,0x00,0x00,0x00,0x00,/*"正",23*/
0x00,0x10,0x24,0x10,0x22,0x10,0x23,0x10,0x22,0x10,0x20,0x10,0x20,0x10,0x21,0x10,
0x22,0x10,0x2C,0x30,0x38,0x30,0x70,0x68,0x20,0xC4,0x01,0x07,0x06,0x02,0x00,0x00,/*"以",24*/
0x08,0x10,0x06,0x18,0x04,0x20,0xFF,0xFE,0x00,0x00,0x3E,0x08,0x22,0x48,0x3E,0x48,
0x22,0x48,0x22,0x48,0x3E,0x48,0x22,0x48,0x22,0x48,0x2A,0x08,0x24,0x28,0x00,0x10,/*"前",25*/
0x0E,0x1E,0x70,0xE0,0x40,0x80,0x40,0x80,0x7C,0x80,0x44,0xFE,0x44,0x88,0x44,0x88,
0x7C,0x88,0x40,0x88,0x41,0x08,0x41,0x08,0x42,0x08,0x42,0x08,0x84,0x08,0x08,0x08,/*"所",26*/
0x01,0x00,0x01,0x00,0x01,0x00,0x3F,0xF8,0x01,0x00,0x01,0x00,0xFF,0xFE,0x03,0x00,
0x03,0x80,0x05,0x40,0x05,0x20,0x09,0x18,0x31,0x0E,0xC1,0x04,0x01,0x00,0x01,0x00,/*"未",27*/
0x1F,0xF0,0x10,0x10,0x10,0x10,0x11,0x10,0x11,0x10,0x11,0x10,0x11,0x10,0x11,0x10,
0x12,0x90,0x02,0x80,0x04,0x80,0x04,0x84,0x08,0x84,0x30,0x86,0xC0,0x7C,0x00,0x00,/*"见",28*/
0x10,0x80,0x10,0x80,0x20,0x80,0x7C,0xFC,0x45,0x04,0x45,0x04,0x46,0x04,0x7C,0x84,
0x44,0x44,0x44,0x64,0x44,0x24,0x44,0x04,0x7C,0x04,0x44,0x28,0x40,0x10,0x00,0x00,/*"的",29*/
0x00,0x80,0x40,0x80,0x2F,0xFC,0x20,0x80,0x00,0x80,0x07,0xF8,0xE4,0x88,0x24,0x88,
0x27,0xF8,0x21,0xA0,0x22,0x98,0x2C,0x88,0x20,0x80,0x50,0x80,0x8F,0xFE,0x00,0x00,/*"速",30*/
0x01,0x00,0x00,0x80,0x3F,0xFE,0x22,0x20,0x22,0x20,0x2F,0xFC,0x22,0x20,0x23,0xE0,
0x20,0x00,0x27,0xF8,0x22,0x10,0x21,0x20,0x20,0xC0,0x41,0x30,0x46,0x0E,0x98,0x04,/*"度",31*/
0x00,0x00,0xFF,0x80,0x22,0x7E,0x22,0x44,0x3E,0x44,0x22,0x44,0x22,0x44,0x3E,0x28,
0x22,0x28,0x22,0x90,0x27,0x10,0x3A,0x28,0xC2,0x46,0x02,0x84,0x02,0x00,0x02,0x00,/*"取",32*/
0x11,0x00,0x19,0x20,0x11,0x10,0x11,0x08,0x21,0xFC,0x3F,0x00,0x50,0x80,0x90,0x80,
0x10,0x80,0x10,0x40,0x10,0x40,0x10,0x24,0x10,0x14,0x10,0x0C,0x10,0x06,0x00,0x00,/*"代",33*/
0x08,0x10,0x04,0x20,0x7F,0xFE,0x01,0x00,0x3F,0xF8,0x01,0x00,0x7F,0xFE,0x02,0x00,
0x07,0xF8,0x0C,0x08,0x37,0xF8,0xC4,0x08,0x07,0xF8,0x04,0x08,0x07,0xF8,0x04,0x08,/*"着",34*/
0x10,0x40,0x18,0x48,0x17,0xFC,0x20,0x40,0x20,0x80,0x60,0x84,0xAF,0xFE,0x20,0x80,
0x21,0x08,0x23,0xFC,0x20,0x08,0x21,0x10,0x20,0xA0,0x20,0x40,0x20,0x20,0x00,0x00,/*"传",35*/
0x10,0x40,0x10,0x20,0x23,0xFE,0x20,0x40,0x44,0x40,0xF8,0x88,0x09,0x04,0x13,0xFE,
0x20,0x94,0x7C,0x90,0x00,0x90,0x00,0x90,0x1D,0x12,0xE1,0x12,0x02,0x0E,0x04,0x00,/*"统",36*/
0x01,0x00,0x01,0x00,0x01,0x00,0x3F,0xF8,0x21,0x08,0x21,0x08,0x3F,0xF8,0x21,0x08,
0x21,0x08,0x21,0x08,0x3F,0xF8,0x21,0x08,0x01,0x02,0x01,0x02,0x00,0xFE,0x00,0x00,/*"电",37*/
/********************************************************************************/
0x08,0x40,0x0C,0x40,0x08,0x40,0x17,0xFC,0x10,0x40,0x33,0xFC,0x30,0x40,0x50,0x40,
0x97,0xFC,0x10,0x44,0x10,0x44,0x10,0x44,0x10,0x44,0x10,0x54,0x10,0x48,0x10,0x40,/*"伟",0*/
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x30,0x00,0x48,0x00,0x48,0x00,0x30,0x00,0x00,0x00,0x00,0x00,/*"。",0*/
//============================================================================
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};


 

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