Start matrix without white flash initial

1

Hi!
When I start matrix.begin() my panel shows a white flash (500 ms) and then works…

Is there any way to do not show this little white flash?
I set before matrix.begin brightness to 0x00 and backgroundlayer to blank.

Thanks

2

What hardware are you using and what sketch? Does it do the same with all sketches? Can you post the entire sketch (you can just use a built in example that shows the behavior) with your config changes at the top?

3

I’m using ESP32.
All sketches do it.

Sketch:

#define COLOR_DEPTH 24
const uint16_t kMatrixWidth = 80;
const uint16_t kMatrixHeight = 40;
const uint8_t kMatrixBytesPerPixel = 3;
const uint8_t kRefreshDepth = 24;
const uint8_t kDmaBufferRows = 2;
const uint8_t kPanelType = SM_PANELTYPE_HUB75_40ROW_MOD20SCAN;
const uint32_t kMatrixOptions = (SM_HUB75_OPTIONS_ESP32_CALC_TASK_CORE_1);
const uint8_t kBackgroundLayerOptions = (SM_BACKGROUND_OPTIONS_NONE);

const rgb24 fillColorB = {0, 0, 0};

void init()
{

  • matrix.addLayer(&backgroundLayer);*
  • backgroundLayer.fillScreen(fillColorB);*
  • matrix.setBrightness(0x00); *
  • matrix.begin();*
    }

With this example, shows the behaviour.

4

You have a unique panel type that probably not many others have used with SmartMatrix Library, so the issue may be related to that.

Does it have the same issue with a low but non-zero brightness level?

5

Yes. It have the same issue with non-zero brightness level.
Thanks for your time Louis, I’ll move on