32×32?

i rewrite sketch scorlltext 16*32 to work with 32*32 and this is the code

// testshapes demo for Adafruit RGBmatrixPanel library.

// Demonstrates the drawing abilities of the RGBmatrixPanel library.

// For 32x32 RGB LED matrix:

// http://www.adafruit.com/products/607



// Written by Limor Fried/Ladyada & Phil Burgess/PaintYourDragon

// for Adafruit Industries.

// BSD license, all text above must be included in any redistribution.



#include    // Core graphics library

#include  // Hardware-specific library

#define F2(progmem_ptr) (const __FlashStringHelper *)progmem_ptr

// If your 32x32 matrix has the SINGLE HEADER input,

// use this pinout:

#define CLK 8  // MUST be on PORTB! (Use pin 11 on Mega)

#define OE  9

#define LAT 10

#define A   A0

#define B   A1

#define C   A2

#define D   A3

// If your matrix has the DOUBLE HEADER input, use:

//#define CLK 8  // MUST be on PORTB! (Use pin 11 on Mega)

//#define LAT 9

//#define OE  10

//#define A   A3

//#define B   A2

//#define C   A1

//#define D   A0

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

const char str[] PROGMEM = "hello";

int    textX   = matrix.width(),

textMin = sizeof(str) * -12,

hue     = 0;

void setup() {



matrix.begin();

matrix.setTextWrap(false); // Allow text to run off right edge

matrix.setTextSize(2);

// draw a pixel in solid white

//  matrix.drawPixel(0, 0, matrix.Color333(7, 7, 7));

// delay(500);



// fix the screen with green

// matrix.fillRect(0, 0, 32, 32, matrix.Color333(0, 7, 0));

// delay(500);



// draw a box in yellow





// draw an 'X' in red

// matrix.drawLine(0, 0, 31, 31, matrix.Color333(7, 0, 0));

// matrix.drawLine(31, 0, 0, 31, matrix.Color333(7, 0, 0));

// delay(500);



// draw a blue circle

//  matrix.drawCircle(10, 10, 10, matrix.Color333(0, 0, 7));

// delay(500);



// fill a violet circle

// matrix.fillCircle(21, 21, 10, matrix.Color333(7, 0, 7));

//  delay(500);



// fill the screen with 'black'

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



// draw some text!

// matrix.setCursor(1, 0);    // start at top left, with one pixel of spacing

// matrix.setTextSize(2);     // size 1 == 8 pixels high

// matrix.setTextWrap(false); // Don't wrap at end of line - will do ourselves



//  matrix.setTextColor(matrix.Color333(7,7,7));

//  matrix.println(" open");

//  matrix.println("welcome");



/* // print each letter with a rainbow color

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('3');

matrix.setTextColor(matrix.Color333(0,7,0));

matrix.println('2');



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.print("*");

*/

// whew!

}



void loop() {

matrix.fillScreen(0);

matrix.drawRect(0, 0, 32, 32, matrix.Color333(7, 7, 0));



matrix.setTextColor(matrix.ColorHSV(hue, 255, 255, true));

matrix.setCursor(textX ,9 );

matrix.print(F2(str));

if((--textX) < textMin) textX = matrix.width();

hue += 7;

if(hue >= 1536) hue -= 1536;



// Update display

matrix.swapBuffers(false);

delay(100);

}

There is not a simple way to chain two matrices together. One matrix would need to communicate with the other in order for them to be in sync showing a display that spans both. You could implement a serial communication method between them, but it’s not a simple thing.

To make two backpacks coordinate their display, you would need to use serial communication between them using the 6-pin serial headers on the board. Not the ribbon cable that connects to the panel. This isn’t a simple project so if you don’t have experience with serial communication and significant programming experience then it’s not going to be easy. It’s not a library change. It is changes to the programs running on the backpack boards.