bitdataWordsFor()

uint32_t objectfled::bitdataWordsFor ( uint32_t numbytes, uint32_t bytesPerDma )

constexpr

Words of bitdata a frame of numbytes bytes per strip needs.

showInternal() fills min(numbytes, 2*bytesPerDma) bytes, 32 words each. A frame larger than 2*bytesPerDma uses the ESG double buffer, which needs the full 2*bytesPerDma*32 words, so this is also its size; the ISR's half-buffer refill relies on that. numbytes == 0 still gets one byte's worth, because fillbits() is a do/while that writes at least one byte (32 words).

Definition at line 17 of file ObjectFLEDBitdataSize.h.

                                                                            {
    return numbytes == 0                ? 32
           : numbytes < 2 * bytesPerDma ? numbytes * 32
                                        : 2 * bytesPerDma * 32;
}

Referenced by grownBitdataWords().

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