Function writeBoundary

src/fl/chipsets/p9813.h:30–30

	SPI mSPI;

	void writeBoundary() { mSPI.writeWord(0); mSPI.writeWord(0); }

	FASTLED_FORCE_INLINE void writeLed(fl::u8 r, fl::u8 g, fl::u8 b) {
		FASTLED_REGISTER fl::u8 top = 0xC0 | ((~b & 0xC0) >> 2) | ((~g & 0xC0) >> 4) | ((~r & 0xC0) >> 6);