countFPS()

void CFastLED::countFPS

(

int

nFrames = 25

)

For debugging, this will keep track of time between calls to countFPS().

Every nFrames calls, it will update an internal counter for the current FPS.

Todo

Make this a rolling counter

Parameters

nFrames

how many frames to time for determining FPS

Definition at line 688 of file FastLED.cpp.hpp.

                                                {
    static int br = 0;
#if SKETCH_HAS_LARGE_MEMORY
    typedef fl::u32 frame_ms_t;
#else
    // Wrapping 16-bit millis saves 2 B RAM; nFrames frames must take < 65 s (#4788).
    typedef fl::u16 frame_ms_t;
#endif
    static frame_ms_t lastframe = 0; // fl::millis();
 
    if(br++ >= nFrames) {
        const frame_ms_t sample = static_cast<frame_ms_t>(fl::millis());
        frame_ms_t now = static_cast<frame_ms_t>(sample - lastframe);
        if(now == 0) {
            now = 1; // prevent division by zero below
        }
        mNFPS = static_cast<fl::u16>((static_cast<fl::u32>(br) * 1000) / now);
        br = 0;
        lastframe = sample;
    }
}

References FL_NO_EXCEPT, fl::millis(), and mNFPS.

Referenced by show(), and showColor().

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