makerhq ledboard example

example.ino

#include <Arduino.h>
#include <Adafruit_NeoMatrix.h>

#define BOARD_WIDTH       10
#define BOARD_HEIGHT      20
#define ROWS_PER_GROUP    4

#define NEO_PIN           7


Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(BOARD_WIDTH,
                                               BOARD_HEIGHT,
                                               NEO_PIN,
                                               NEO_MATRIX_BOTTOM + NEO_MATRIX_LEFT + NEO_MATRIX_ROWS,
                                               NEO_GRB + NEO_KHZ800);

uint16_t xyToPixel(uint16_t x, uint16_t y) {
    int row_in_group = y%ROWS_PER_GROUP;

    uint16_t pixel = 0;
    switch(row_in_group) {
        case 0:
            pixel = y * BOARD_WIDTH + x;
            break;
        case 1:
            pixel = (y+1) * BOARD_WIDTH + x;
            break;
        case 2:
            pixel = (y * BOARD_WIDTH - x) - 1;
            break;
        case 3:
            pixel = ((y+1) * BOARD_WIDTH) - x - 1;
            break;
    }

#ifdef TOP_DOWN
    return (BOARD_WIDTH * BOARD_HEIGHT) - pixel - 1;
#else
    return pixel;
#endif
}


void setup() {
    matrix.begin();
    matrix.show();
    matrix.setRemapFunction(xyToPixel);

}

void loop() {

    matrix.clear();

    for (int y = 0; y < BOARD_HEIGHT; y++) {
        for (int x = 0; x < BOARD_WIDTH; x++) {
            matrix.drawPixel(x, y, matrix.Color(255, 0, 0));
            matrix.show();
            delay(100);
        }
    }
    
    delay(2000);
}