Matrix MAX7219 LED 8×8 SPI Display Module – Rød

Matrix MAX7219 LED 8×8 SPI Display Module – Rød giver dig mulighed for at eksperimentere med dot matrix LED uden alle de komplicerede ledninger. Modulet bruger en MAX7219 LED-driver, der håndterer alle de komplicerede ting, såsom at multiplexere lysdioderne og køre dem ved de rigtige strømme. Derudover kan modulerne være daisy-chained (Serie forbindes) via SPI grænseflade for at fremstille større LED-skærme, mens de stadig kun kræver 3 digitale kontrolben (SPI).

Tekniske detaljer:

Resolution: 8 x 8

Display size: 32*32mm
Cascadable: Yes
Number of cascadable node: 32(MAX)
Driver IC: MAX7219
Working voltage: 4.5-5.5V
Working current: 250mA(MAX)
Interface logic voltage: 5V
Interface type: SPI
Color: Red

Installere Arduino IDE Software

Før du kan starte din programmering skal Arduino’s IDE software hentes. Dette program bruges til at programmere chippen.
Download fra dette link: Downlaod

Installere LedControl-master Library

• Download library (Download)
• Udpak filer
• Flyt/kopir mappen “LedControl-master” til  “libraries” som findes i “Arduino IDE” mappen (C:/Program Files (x86)/Arduino/libraries)
• Åben Arduino IDE software og klik på “Sketch/Include library”
• Klik nu på “Add Zip. library” og find Zip filen du lige har downloaded.
• Åben “Sketch/Include library/Manage Librarys” for at opdatere library.
• Luk, og åben Arduino IDE programmet. (Genstart programmet)
• Nu er “LedControl-master” installeret

Du skal bruge:

• Arduino UNO R3 Chip
• Dupont kabel

Forbind:

VCC (Modul) – 5V (Arduino)
GND (Modul) – GND (Arduino)
DIN (Modul) – D12 (Arduino)
CS (Modul) – D11 (Arduino)
CLK (Modul) – D10 (Arduino)

Kode:

#include <LedControl.h>

int DIN = 12;
int CS = 11;
int CLK = 10;

byte e[8]= {0x7C,0x7C,0x60,0x7C,0x7C,0x60,0x7C,0x7C};
byte d[8]= {0x78,0x7C,0x66,0x66,0x66,0x66,0x7C,0x78};
byte u[8]= {0x66,0x66,0x66,0x66,0x66,0x66,0x7E,0x7E};
byte c[8]= {0x7E,0x7E,0x60,0x60,0x60,0x60,0x7E,0x7E};
byte eight[8]= {0x7E,0x7E,0x66,0x7E,0x7E,0x66,0x7E,0x7E};
byte s[8]= {0x7E,0x7C,0x60,0x7C,0x3E,0x06,0x3E,0x7E};
byte dot[8]= {0x00,0x00,0x00,0x00,0x00,0x00,0x18,0x18};
byte o[8]= {0x7E,0x7E,0x66,0x66,0x66,0x66,0x7E,0x7E};
byte m[8]= {0xE7,0xFF,0xFF,0xDB,0xDB,0xDB,0xC3,0xC3};

LedControl lc=LedControl(DIN,CLK,CS,0);

void setup(){
lc.shutdown(0,false); //The MAX72XX is in power-saving mode on startup
lc.setIntensity(0,15); // Set the brightness to maximum value
lc.clearDisplay(0); // and clear the display
}

void loop(){

byte smile[8]= {0x3C,0x42,0xA5,0x81,0xA5,0x99,0x42,0x3C};
byte neutral[8]= {0x3C,0x42,0xA5,0x81,0xBD,0x81,0x42,0x3C};
byte frown[8]= {0x3C,0x42,0xA5,0x81,0x99,0xA5,0x42,0x3C};

printByte(smile);

delay(1000);

printByte(neutral);

delay(1000);

printByte(frown);

delay(1000);

printEduc8s();

lc.clearDisplay(0);

delay(1000);
}

void printEduc8s()
{
printByte(e);
delay(1000);
printByte(d);
delay(1000);
printByte(u);
delay(1000);
printByte(c);
delay(1000);
printByte(eight);
delay(1000);
printByte(s);
delay(1000);
printByte(dot);
delay(1000);
printByte(c);
delay(1000);
printByte(o);
delay(1000);
printByte(m);
delay(1000);
}

void printByte(byte character [])
{
int i = 0;
for(i=0;i<8;i++)
{
lc.setRow(0,i,character[i]);
}
}

Dot Matrix Tool:

MAX7219 chippen som styre LED dioderne styres af “Hex” tal, de skrives ind i begyndelsen af koden:

byte e[8]= {0x7C,0x7C,0x60,0x7C,0x7C,0x60,0x7C,0x7C};
byte d[8]= {0x78,0x7C,0x66,0x66,0x66,0x66,0x7C,0x78};
byte u[8]= {0x66,0x66,0x66,0x66,0x66,0x66,0x7E,0x7E};
byte c[8]= {0x7E,0x7E,0x60,0x60,0x60,0x60,0x7E,0x7E};
byte eight[8]= {0x7E,0x7E,0x66,0x7E,0x7E,0x66,0x7E,0x7E};
byte s[8]= {0x7E,0x7C,0x60,0x7C,0x3E,0x06,0x3E,0x7E};
byte dot[8]= {0x00,0x00,0x00,0x00,0x00,0x00,0x18,0x18};
byte o[8]= {0x7E,0x7E,0x66,0x66,0x66,0x66,0x7E,0x7E};
byte m[8]= {0xE7,0xFF,0xFF,0xDB,0xDB,0xDB,0xC3,0xC3};

Du kan bruge dette program til at udlæse hex coder:

• Download HEX LED Displat Tools

Hex koden kan også laves online: Klik her

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