Keyestudio LED Dot Matrix Ekran Modülü 16*16

Tanıtım

Keyestudio LED nokta vuruşlu ekran modülü, dört adet 8 * 8 nokta vuruşlu matris bağlar. Hat seçimi, iki 74HC138'den oluşan 4-16 dekoder tarafından seçilir ve flaş hattı için LED anot bağlanacaktır. Sütun çıkışı, SPI sinyali yoluyla seri verileri paralel verilere dönüştürebilen iki 74HC595 kaskadından oluşur. Bir sütunun çıkış sinyali yüksek bir seviyede olduğunda, sütundaki LED katodu da yüksek bir seviyedir, böylece seçilen çizginin ve sütunun kesişiminde bulunan LED yanmaz. Aksine, sütunun çıkış sinyali düşük bir seviyede olduğunda, sütundaki LED katodu da düşük bir seviyedir, böylece seçilen çizgi ve sütunun kesişme noktasında bulunan LED yanar. Bir satır geçtikten sonra, 74HC595 satır verisini çıkarır. Toplam 16 satır, sırasıyla 16 * 16 nokta vuruşlu matrisin gerekli metni veya grafikleri göstermesini sağlayan dinamik tarama ile döngü yapar.

Performans Parametreleri

• Besleme Gerilimi: DC 5V
       LCD12864 arayüzü ile uyumlu, bir kez tak ve çalıştır;
       51 tek çipli ve Arduino rutinleriyle sağlanan zengin rutinler.

Bağlantı Şeması

Örnek Kod

#include 
#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


unsigned char Display_Buffer[2];
const unsigned char  Word1[1][32] = 
{
0xFF,0xFF,0xFF,0xE1,0xC0,0x80,0x80,0x80,0xC0,0xE0,0xF0,0xF8,0xFC,0xFE,0xFF,0xFF,
0xFF,0xFF,0xFF,0x87,0x03,0x01,0x01,0x01,0x03,0x07,0x0F,0x1F,0x3F,0x7F,0xFF,0xFF,/*"C:\Users\Lin\Desktop\心.BMP",0*/

};
const unsigned char  Word2[1][32] = 
{
0xFF,0xF8,0xF0,0xE0,0xC0,0x87,0x86,0x84,0x85,0x86,0x87,0xC0,0xE0,0xF0,0xF8,0xFF,
0xFF,0x1F,0x0F,0x07,0x03,0xE1,0x61,0xA1,0x21,0x61,0xE1,0x03,0x07,0x0F,0x1F,0xFF,/*"Unnamed file",0*/
};

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);
}

void loop()
{
  int a=300, i=300;
  while(i)
  {
  Display(Word1);
  i--;
  }
  delay(100);
    while(a)
  {
  Display(Word2);
  a--;
  }
  delay(100);
}



//************************************************************
//num means the number of word  dat[][32] is the name of font
//*************************************************************
void Display(const unsigned char dat[][32])         
{
  unsigned char i;

  for( i = 0 ; i < 16 ; i++ )
  {
    digitalWrite(LEDARRAY_G, HIGH);   //When updating the data,please close the display. After updating the data, open the 138 display line. Avoiding ghosting.

    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);         //storage data  
    delayMicroseconds(1);

    digitalWrite(LEDARRAY_LAT, LOW);
    delayMicroseconds(1);

    Scan_Line(i);             //Choose the line i

    digitalWrite(LEDARRAY_G, LOW);

    delayMicroseconds(100);;      // Delay for a period of time to let the LED light up.          
  } 
}

//****************************************************
//Scanning line
//****************************************************
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;  
  }
}

//****************************************************
//Send the data      
//****************************************************
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);
    }

    delayMicroseconds(1);
    digitalWrite(LEDARRAY_CLK, HIGH);       // Rising edge sends the data 
      delayMicroseconds(1);
    digitalWrite(LEDARRAY_CLK, LOW);
      delayMicroseconds(1);   
    dat >>= 1;

  }     
}

Sonuç

Yukarıdaki diyagramdaki kablolama, çalıştırıldıktan sonra nokta matris ekranı aşağıdaki modeli gösterir.

Döküman

PDF File：

https://drive.google.com/open?id=17BAJSFeL_gatAiYTKFhvkxO0lgYSsyU9

Video: