Change To Solid Colour

Using Arduino LEDs and Multiplexing
1

I'm trying to understand the color.HSV and the color565 and color888. A snippet of the code is noted below.

  canvas->setCursor(text_x, text_y);
  for (int i = 0; i < (int)strlen(text); i++) {
    // Get 24-bit color for this character, cycling through color wheel
    uint32_t color888 = glasses.ColorHSV(65536 * i / strlen(text));
    // Remap 24-bit color to '565' color used by Adafruit_GFX
    uint16_t color565 = glasses.color565(color888);
    canvas->setTextColor(color565); // Set text color
    canvas->print(text[i]);         // and print one character
  }

The text scrolls across the glasses in multi colours, but I want to change it to a solid colour. I've tried to add some R, G, B and using them instead of the noted above colours, but it does not nothing.

This is the Adafruit glasses with the IS31FL3741 driver board.

Thanks

Scott

2

Just a guess, but if you assigned a constant value to color565, that should stop the multi-colour effect.

And guess #2, color565 is a colour in the RGB565 format. If you google "RGB565 color picker" you may be able to get the value for the colour you want your text to appear.

3

I am not at all familiar with the code but this:

Appears to change the colour depending of i in the for loop, so change that bit of code to a constant value and the colour will (should) not change.

4

I changed
canvas->setTextColor(color565); // Set text color
to
canvas->setTextColor(B10000); // Set text color
this caused the LED's to be a solid blue. When I tried different ideas in this line, when compiling the code there was a suggestion that the "B10000" could be used. So I changed it a the colour changed to a solid blue.

The blue is the only colour I've been able to figure out. Other letters and number combinations produce an error when compiling.

5

Yes I believe that is true. The code makes the LED's change and in a circle will make the LED's appear to be rotating with different colours.

6

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