PIR to SAMD21 to WS28212b Fade Color 250730

Projects Programming
33

This is fine for ramping red opposite to blue, but should not be called with step numbers not in the range 0 .. 255, as was pointed out:

void setLedColor(int colorStep)
{
  int r = colorStep;       // 256 would be 0, or off.
  int b = 255 - colorStep; // -1, full on
  int g = 0;

255 - 0 is 255, 255 - 255 is 0. A linear relationship.

255 - 256 is -1, or 255 when it is put where an unsigned char is expected.

a7