Neo Matrix test for M5 Atom (using FastLed)

matrixtest_fastled.ino

// Adafruit_NeoMatrix example for single NeoPixel Shield.
// Scrolls 'Howdy' across the matrix in a portrait (vertical) orientation.

#include <Adafruit_GFX.h>
#include <FastLED.h>
#include <FastLED_NeoMatrix.h>
#include <Fonts/TomThumb.h>

#define PIN 27
#define mw 5
#define mh 5
#define NUMMATRIX (mw*mh)

CRGB matrixleds[NUMMATRIX];

FastLED_NeoMatrix *matrix = new FastLED_NeoMatrix(matrixleds, mw, mh, 
  NEO_MATRIX_TOP     + NEO_MATRIX_RIGHT +
    NEO_MATRIX_COLUMNS + NEO_MATRIX_PROGRESSIVE );

const uint16_t colors[] = {
  matrix->Color(255, 0, 0), matrix->Color(0, 255, 0), matrix->Color(0, 0, 255) };

void setup() {
  FastLED.addLeds<NEOPIXEL,PIN>(matrixleds, NUMMATRIX);
  matrix->begin();
  matrix->setTextWrap(false);
  matrix->setFont(&TomThumb);
  matrix->setBrightness(40);
  matrix->setTextColor(colors[0]);
}

int x    = mh;
int pass = 0;

void loop() {
  matrix->fillScreen(0);
  matrix->setCursor(x, mh);
  matrix->print(F("Hello World"));
  if(--x < -60) {
    x = matrix->width();
    if(++pass >= 3) pass = 0;
    matrix->setTextColor(colors[pass]);
  }
  matrix->show();
  delay(100);
}