SmartMatrix with 1/4 scan hub75 panels

[guillaume.s]

Hi Louis, thanks for the quick answer.

Here is a link to a video of what I get with your modifications: MATRIX_1_4.mp4

This is supposed to be a blue dot scanning every row pixel by pixel over a red background.
It’s hard to describe what’s happening, I hope the video talk by itself.

And here is the code :

void loop() {
  static unsigned char x = 0;
  static unsigned char y = 0;

  SM_RGB color = CRGB(CHSV(200, 255, 255));
  backgroundLayer.drawPixel(x,y, color);
  backgroundLayer.swapBuffers();

  x++;
  if (x >= kMatrixWidth) {
    x = 0;
    y++;
    if (y >= kMatrixHeight) {
      y = 0;
      backgroundLayer.fillScreen(defaultBackgroundColor);
    }
  }
  delay(100);
  digitalWrite(ledPin, !digitalRead(ledPin));
}

Here a picture of a simple grey background : LINK

Do you understand what’s going on ? If you can give me a hint of what I can modify in the main library code, I can give it a try.

Regards,

Guillaume