clearLedDataInternal()

void CLEDController::clearLedDataInternal

(

int

nLeds = -1

)

Zero out the LED data managed by this controller.

Definition at line 76 of file cled_controller.cpp.hpp.

                                                                {
    // On common code that runs on avr, every byte counts.
    //
    // mLeds spans one lane, not the whole buffer. A parallel controller is
    // registered with the PER-LANE count -- addLeds<NUM_LANES, ...>(data,
    // nLeds) forwards nLeds -- while the caller's array is NUM_LANES * nLeds.
    // Clearing mLeds.size() therefore blanked only the first strip and left
    // the rest lit, which is FastLED#1017.
    //
    // lanes() is 1 for every ordinary controller, so this is a no-op there. It
    // reports the template lane count on parallel controllers, which is what
    // the caller allocated, so this cannot run past the end of their array
    // even when fewer lanes were actually claimed.
    fl::u16 n = nLeds >= 0 ? static_cast<fl::u16>(nLeds)
                           : static_cast<fl::u16>(mLeds.size() * lanes());
    if (mLeds.data()) {
        fl::memset((void*)mLeds.data(), 0, sizeof(CRGB) * n);
    }
 
}

References fl::FL_NO_EXCEPT, lanes(), fl::memset(), and mLeds.

Referenced by CFastLED::clearData(), and clearLeds().

Here is the call graph for this function:

Here is the caller graph for this function: