16x16点阵LED屏

Angel_YY · 发表于 2019-3-22 09:51:14

本帖最后由 Angel_YY 于 2019-4-3 20:09 编辑

由于最近正在准备为自家孩子教授编程课程，所以准备为孩子做一个可以编程控制的led阵列显示屏，可以用来显示字母、汉字和简单的图形，甚至可以编程实现贪吃蛇这类简单的游戏，阵列显示定义为16*16的方阵。

主控：Arduino UNO。
驱动：74HC138*2、74HC595*2
LED：SML-S13UT
数量：256颗

在LED驱动部分，使用两片74HC138作为点阵的行控制驱动芯片。

使用两片74HC595作为LED阵列的列控制。

电源采用外接5V，通讯接口通过杜邦线连接到Arduino UNO的数字2~9接口。
Arduino代码如下：

#include <Arduino.h>
//IO配置
#define LEDARRAY_D 2
#define LEDARRAY_C 3
#define LEDARRAY_B 4
#define LEDARRAY_A 5
#define LEDARRAY_G 6
#define LEDARRAY_DI 7
#define LEDARRAY_CLK 8
#define LEDARRAY_LAT 9
#define led 13
#define Num_Word 1 //液晶能显示的汉字个数
unsigned char Display_Buffer[2];
unsigned char Display_Swap_Buffer[Num_Word][32]={0}; //显示缓冲区
bool Shift_Bit = 0;
bool Flag_Shift = 0;
unsigned char Timer0_Count = 0;
unsigned char temp = 0x80;
unsigned char Shift_Count = 0;
unsigned char Display_Word_Count = 0;
#define Num_Of_Word 6
const unsigned char Word[Num_Of_Word][32] =
{
0xFF,0xC0,0xDB,0xDB,0xDB,0xC0,0xFD,0xFB,0xF0,0xEF,0x97,0xFB,0xFD,0xFC,0xE3,0x1F,
0xFF,0x07,0xB7,0xB7,0xB7,0x07,0xFF,0xFF,0x0F,0xEF,0xDF,0xBF,0x7F,0xFF,0xFF,0xFF,/*"罗",0*/
0xEF,0xEF,0xEF,0xEF,0x03,0xDB,0xDB,0xD8,0xDA,0xB6,0xD6,0xEE,0xD6,0xBB,0x7B,0xFF,
0xFF,0x03,0x7B,0x5B,0x6B,0x7B,0x7B,0x01,0xFB,0xBB,0xDB,0xFB,0x01,0xFB,0xD7,0xEF,/*"姆",1*/
0xEF,0xEF,0xEF,0xEC,0x03,0xEF,0xEF,0xEA,0xE7,0xCF,0x2F,0xEF,0xEF,0xEF,0xAE,0xD9,
0xDF,0xDF,0xDF,0x01,0xDF,0xDF,0xDF,0x03,0x7B,0x77,0xB7,0xAF,0xDF,0xAF,0x77,0xF9,/*"技",2*/
0xFE,0xFE,0xFE,0xFE,0x80,0xFC,0xFA,0xFA,0xF6,0xEE,0xDE,0xBE,0x7E,0xFE,0xFE,0xFE,
0xFF,0xDF,0xEF,0xEF,0x03,0x7F,0xBF,0xBF,0xDF,0xEF,0xF7,0xFB,0xFD,0xFF,0xFF,0xFF,/*"术",3*/
0xDF,0xEF,0xEF,0x07,0xF7,0xEF,0xEC,0xC7,0xAB,0x6B,0xEF,0xEF,0xEF,0xEF,0xE8,0xEF,
0xDF,0xDF,0xDF,0xDF,0xDF,0xDF,0x01,0xDF,0xDF,0xDF,0xDF,0xDF,0xDF,0xDF,0x01,0xFF,/*"社",4*/
0xFF,0x80,0xBF,0xBF,0xBB,0xBD,0xBE,0xBF,0xBE,0xBD,0xBB,0xB7,0xBF,0xBF,0x80,0xFF,
0xFF,0x03,0xFF,0xEF,0xEF,0xDF,0xBF,0x7F,0xBF,0xDF,0xEF,0xEF,0xFF,0xFF,0x01,0xFF,/*"区",5*/
};
void setup()
{
pinMode(LEDARRAY_D, OUTPUT);
pinMode(LEDARRAY_C, OUTPUT);
pinMode(LEDARRAY_B, OUTPUT);
pinMode(LEDARRAY_A, OUTPUT);
pinMode(LEDARRAY_G, OUTPUT);
pinMode(LEDARRAY_DI, OUTPUT);
pinMode(LEDARRAY_CLK, OUTPUT);
pinMode(LEDARRAY_LAT, OUTPUT);
Clear_Display();
}
void loop()
{
unsigned int i;
for(i = 0 ; i < 10; i ++) //移动速度设定
{
Display(Display_Swap_Buffer);
}
Display_Word_Count = Shift_Count/16; //计算当前显示第几个字
Calc_Shift();
Shift_Count++;
if(Shift_Count == (Num_Of_Word+1)*16 ) //移动次数
{
Shift_Count = 0;
}
}
//************************************************************
//清空缓冲区
//************************************************************
void Clear_Display()
{
unsigned char i,j;
for(j = 0 ; j < Num_Word; j++)
{
for(i = 0 ; i < 32 ;i++)
{
Display_Swap_Buffer[j][i] = 0xff; //0=显示 1=不显示
}
}
}
//************************************************************
//计算移动数据，存在在缓冲器
//************************************************************
void Calc_Shift()
{
unsigned char i;
for(i = 0;i < 16;i++)
{
if((Display_Swap_Buffer[0][16+i]&0x80) == 0) //前8位移位
{
Display_Swap_Buffer[0][i] = (Display_Swap_Buffer[0][i] << 1)&0xfe; //最低位清零
}
else
{
Display_Swap_Buffer[0][i] = (Display_Swap_Buffer[0][i] << 1)|0x01; //最低位置一
}
if(Shift_Count%16 < 8 && Display_Word_Count < Num_Of_Word)
{
Shift_Bit = Word[Display_Word_Count][i]&temp;
}
else if(Shift_Count%16 < 16 && Display_Word_Count < Num_Of_Word)
{
Shift_Bit = Word[Display_Word_Count][16+i]&temp;
}
else
{
Shift_Bit = 1; //把字移出缓冲区
}
if( Shift_Bit == 0) //后8位移位
{
Display_Swap_Buffer[0][16+i] = (Display_Swap_Buffer[0][16+i] << 1)&0xfe; //最低位清零
}
else
{
Shift_Bit = 1;
Display_Swap_Buffer[0][16+i] = (Display_Swap_Buffer[0][16+i] << 1)|0x01; //最低位置一
}
}
temp = (temp>>1)&0x7f;
if(temp == 0x00)
{
temp = 0x80;
}
}
//************************************************************
//num为字数 dat[][32]为字模的名称
//*************************************************************
void Display(unsigned char dat[][32])
{
unsigned char i;
for( i = 0 ; i < 16 ; i++ )
{
digitalWrite(LEDARRAY_G, HIGH); //更新数据时候关闭显示。等更新完数据，打开138显示行。防止重影。
Display_Buffer[0] = dat[0][i];
Display_Buffer[1] = dat[0][i+16];
Send(Display_Buffer[1]);
Send(Display_Buffer[0]);
digitalWrite(LEDARRAY_LAT, HIGH); //锁存数据
delayMicroseconds(1);
digitalWrite(LEDARRAY_LAT, LOW);
delayMicroseconds(1);
Scan_Line(i); //选择第i行
digitalWrite(LEDARRAY_G, LOW);
delayMicroseconds(300);; //延时一段时间，让LED亮起来。
}
}
//****************************************************
//扫描某一行
//****************************************************
void Scan_Line( unsigned char m)
{
switch(m)
{
case 0:
digitalWrite(LEDARRAY_D, LOW);digitalWrite(LEDARRAY_C, LOW);digitalWrite(LEDARRAY_B, LOW);digitalWrite(LEDARRAY_A, LOW);
break;
case 1:
digitalWrite(LEDARRAY_D, LOW);digitalWrite(LEDARRAY_C, LOW);digitalWrite(LEDARRAY_B, LOW);digitalWrite(LEDARRAY_A, HIGH);
break;
case 2:
digitalWrite(LEDARRAY_D, LOW);digitalWrite(LEDARRAY_C, LOW);digitalWrite(LEDARRAY_B, HIGH);digitalWrite(LEDARRAY_A, LOW);
break;
case 3:
digitalWrite(LEDARRAY_D, LOW);digitalWrite(LEDARRAY_C, LOW);digitalWrite(LEDARRAY_B, HIGH);digitalWrite(LEDARRAY_A, HIGH);
break;
case 4:
digitalWrite(LEDARRAY_D, LOW);digitalWrite(LEDARRAY_C, HIGH);digitalWrite(LEDARRAY_B, LOW);digitalWrite(LEDARRAY_A, LOW);
break;
case 5:
digitalWrite(LEDARRAY_D, LOW);digitalWrite(LEDARRAY_C, HIGH);digitalWrite(LEDARRAY_B, LOW);digitalWrite(LEDARRAY_A, HIGH);
break;
case 6:
digitalWrite(LEDARRAY_D, LOW);digitalWrite(LEDARRAY_C, HIGH);digitalWrite(LEDARRAY_B, HIGH);digitalWrite(LEDARRAY_A, LOW);
break;
case 7:
digitalWrite(LEDARRAY_D, LOW);digitalWrite(LEDARRAY_C, HIGH);digitalWrite(LEDARRAY_B, HIGH);digitalWrite(LEDARRAY_A, HIGH);
break;
case 8:
digitalWrite(LEDARRAY_D, HIGH);digitalWrite(LEDARRAY_C, LOW);digitalWrite(LEDARRAY_B, LOW);digitalWrite(LEDARRAY_A, LOW);
break;
case 9:
digitalWrite(LEDARRAY_D, HIGH);digitalWrite(LEDARRAY_C, LOW);digitalWrite(LEDARRAY_B, LOW);digitalWrite(LEDARRAY_A, HIGH);
break;
case 10:
digitalWrite(LEDARRAY_D, HIGH);digitalWrite(LEDARRAY_C, LOW);digitalWrite(LEDARRAY_B, HIGH);digitalWrite(LEDARRAY_A, LOW);
break;
case 11:
digitalWrite(LEDARRAY_D, HIGH);digitalWrite(LEDARRAY_C, LOW);digitalWrite(LEDARRAY_B, HIGH);digitalWrite(LEDARRAY_A, HIGH);
break;
case 12:
digitalWrite(LEDARRAY_D, HIGH);digitalWrite(LEDARRAY_C, HIGH);digitalWrite(LEDARRAY_B, LOW);digitalWrite(LEDARRAY_A, LOW);
break;
case 13:
digitalWrite(LEDARRAY_D, HIGH);digitalWrite(LEDARRAY_C, HIGH);digitalWrite(LEDARRAY_B, LOW);digitalWrite(LEDARRAY_A, HIGH);
break;
case 14:
digitalWrite(LEDARRAY_D, HIGH);digitalWrite(LEDARRAY_C, HIGH);digitalWrite(LEDARRAY_B, HIGH);digitalWrite(LEDARRAY_A, LOW);
break;
case 15:
digitalWrite(LEDARRAY_D, HIGH);digitalWrite(LEDARRAY_C, HIGH);digitalWrite(LEDARRAY_B, HIGH);digitalWrite(LEDARRAY_A, HIGH);
break;
default : break;
}
}
//****************************************************
//发送数据
//****************************************************
void Send( unsigned char dat)
{
unsigned char i;
digitalWrite(LEDARRAY_CLK, LOW);
delayMicroseconds(1);;
digitalWrite(LEDARRAY_LAT, LOW);
delayMicroseconds(1);;
for( i = 0 ; i < 8 ; i++ )
{
if( dat&0x01 )
{
digitalWrite(LEDARRAY_DI, HIGH);
}
else
{
digitalWrite(LEDARRAY_DI, LOW);
}
digitalWrite(LEDARRAY_CLK, HIGH); //上升沿发送数据
delayMicroseconds(1);;
digitalWrite(LEDARRAY_CLK, LOW);
delayMicroseconds(1);;
dat >>= 1;
}
}

复制代码

显示效果如下：

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呃(⊙o⊙)… · 发表于 2019-3-22 12:39:37

很棒啊，很不错的创意

ImCQ · 发表于 2019-3-27 09:13:52

挺好哒，学习了

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