fl::DigitalMultiWrite16 Class Reference

Detailed Description

Pre-computed nibble LUT for fast 16-pin digital writes.

Call init() once with your 16 pin numbers (-1 to skip a position), then call write() in your hot loop. Each u16 in the data stream is split into four 4-bit nibbles; each nibble indexes into a 16-entry LUT that yields the pin indices to set HIGH or LOW — no per-bit branching.

Definition at line 93 of file pins.h.

#include <pins.h>

Collaboration diagram for fl::DigitalMultiWrite16:

Classes
struct	PinList

Public Member Functions
	DigitalMultiWrite16 () FL_NOEXCEPT=default
bool	allSamePort () const
	Check whether all active pins (non -1) share the same GPIO port.
void	init (const Pins16 &pins)
	Initialize from 16 pin numbers. -1 means "skip this bit position".
void	write (fl::span< const u16 > pin_data) const
	Write pre-transposed 16-bit data to the 16 pins.

Private Member Functions
void	buildNibbleLut (u8 bit_offset, PinList(&set_lut)[16], PinList(&clr_lut)[16])

Static Private Member Functions
static void	applyNibble (const PinList &set, const PinList &clr)

Private Attributes
PinList	mClrNib [4][16] = {}
int	mPins [16] = {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1}
PinList	mSetNib [4][16] = {}

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The documentation for this class was generated from the following files:

• fl/system/pins.h
• fl/system/pins.cpp.hpp