Graphics Issues with the Adafruit 32x64 RGB Matrix

Firmware Libraries
1

So I recently purchased the Adafruit 32x64 RGB Matrix, and I’ve been able to successfully (kinda) light it up and interact with it.

The problem I am facing though is with the graphics library and setting up the library so it understands that my board is 32x64 and not 32x32.

The code I am using can be seen below.

#include "Adafruit_GFX.h"   // Core graphics library
#include "RGBmatrixPanel.h" // Hardware-specific library
#include "math.h"           // Math library

#define pgm_read_byte_near(_addr) (pgm_read_byte(_addr))
#define pgm_read_byte_far(_addr)  (pgm_read_byte(_addr))
#define pgm_read_word(_addr)      (*(const uint16_t *)(_addr))
#define pgm_read_word_near(_addr) (pgm_read_word(_addr))

#define RGBPCversion "V1.03g"

#define PI 3.1415926539

#define CLK D6
#define OE  D7
#define LAT A4
#define A   A0
#define B   A1
#define C   A2
#define D   A3

char publishString[40];

RGBmatrixPanel matrix(A, B, C, D, CLK, LAT, OE, false);

SYSTEM_MODE(SEMI_AUTOMATIC);

void setup()
{
    Particle.connect();
    while (!Particle.connected())
    {
        Particle.process();
    }
    Particle.publish("RGBPongClock", RGBPCversion, 60, PRIVATE);
    Particle.process();

    matrix.begin();

    matrix.drawPixel(0, 0, matrix.Color333(7, 7, 7));
    delay(500);

    matrix.fillRect(0, 0, matrix.width(), matrix.height(), matrix.Color333(0, 7, 0));
    delay(500);

    matrix.drawRect(0, 0, matrix.width(), matrix.height(), matrix.Color333(7, 7, 0));
    delay(500);

    matrix.drawLine(0, 0, matrix.width()-1, matrix.height()-1, matrix.Color333(7, 0, 0));
    matrix.drawLine(matrix.width()-1, 0, 0, matrix.height()-1, matrix.Color333(7, 0, 0));
    delay(500);

    matrix.drawCircle(10, 10, 10, matrix.Color333(0, 0, 7));
    delay(500);

    matrix.fillCircle(40, 21, 10, matrix.Color333(7, 0, 7));
    delay(500);

    matrix.fillScreen(matrix.Color333(0, 0, 0));

    matrix.setTextSize(1);
    matrix.setTextWrap(false);

    matrix.setCursor(8, 0);
    uint8_t w = 0;
    char *str = "AdafruitIndustries";
    for(w = 0; w < 8; w++)
    {
        matrix.setTextColor(Wheel(w));
        matrix.print(str[w]);
    }
    matrix.setCursor(2, 8);
    for(w = 8; w < 18; w++)
    {
        matrix.setTextColor(Wheel(w));
        matrix.print(str[w]);
    }
    matrix.println();
    matrix.setTextColor(matrix.Color333(7, 7, 7));
    matrix.println("LED MATRIX!");

    matrix.setTextColor(matrix.Color333(7, 0, 0));
    matrix.print('3');
    matrix.setTextColor(matrix.Color333(7, 4, 0));
    matrix.print('2');
    matrix.setTextColor(matrix.Color333(7, 7, 0));
    matrix.print('x');
    matrix.setTextColor(matrix.Color333(4, 7, 0));
    matrix.print('6');
    matrix.setTextColor(matrix.Color333(0, 7, 0));
    matrix.print('4');
    matrix.setCursor(34, 24);
    matrix.setTextColor(matrix.Color333(0, 7, 7));
    matrix.print("*");
    matrix.setTextColor(matrix.Color333(0, 4, 7));
    matrix.print('R');
    matrix.setTextColor(matrix.Color333(0, 0, 7));
    matrix.print('G');
    matrix.setTextColor(matrix.Color333(4, 0, 7));
    matrix.print("B");
    matrix.setTextColor(matrix.Color333(7, 0, 4));
    matrix.println("*");
}

void loop()
{

}

uint16_t Wheel(byte WheelPos)
{
    if(WheelPos < 8)
    {
        return matrix.Color333(7 - WheelPos, WheelPos, 0);
    }
    else if(WheelPos < 16)
    {
        WheelPos -= 8;
        return matrix.Color333(0, 7 - WheelPos, WheelPos);
    }
    else
    {
        WheelPos -= 16;
        return matrix.Color333(0, WheelPos, 7 - WheelPos);
    }
}

The two libraries at the top can be found here, and here.

With the code above, my board should look exactly like this.

In the RGBmatrixPanel.cpp file, there’s a section for numPanels, which by default is set to 1.
When I leave this set as the default, my matrix board looks like the following.

So naturally, I assume I need to change numPanels from 1 to 2.
When I do that, you can see what the board looks like.

I’ve tried everything I could think of, and now I’m asking the community for their input.

Thanks guys!

2

It looks like the library defaults to a width of 32, so you have to provide an extra parameter to the constructor, otherwise. Try this:

RGBmatrixPanel matrix(A, B, C, D, CLK, LAT, OE, false, 64);
3

@dougal, thanks! I will be testing tonight just to be sure as I have never tested the RGBMatrxiPanel code with that wide a display though it should work. :smile:

4

@peekay123 Let me know when you want to test code on a 64x32 matrix, I’ll be more than happy to flash it!

5

Is this figured out? I was going to try this matrix later this week.

6

@naikrovek, it is working with the latest IDE library. You just need to use the following constructor:

//RGBmatrixPanel matrix(A, B, C, CLK, LAT, OE, true, 32);      // 16x32
//RGBmatrixPanel matrix(A, B, C, D,CLK, LAT, OE, true, 32);    // 32x32
RGBmatrixPanel matrix(A, B, C, D,CLK, LAT, OE, true, 64);      // 64x32