SPI wrapper class that provides flexible hardware abstraction. More...

#include <SPIWrapper.h>

Inheritance diagram for arduino::SPIWrapper:

Public Member Functions
	SPIWrapper (HardwareSPI &spi)

	SPIWrapper (SPISource &source)

void	attachInterrupt ()

void	begin ()

void	beginTransaction (SPISettings settings)

void	detachInterrupt ()

void	end ()

void	endTransaction (void)

void	notUsingInterrupt (int interruptNumber)

void	setSource (SPISource *source)
	alternatively defines a class that provides the SPI implementation

void	setSPI (HardwareSPI *spi)
	defines the spi implementation: use nullptr to reset.

uint8_t	transfer (uint8_t data)

void	transfer (void *data, size_t count)

uint16_t	transfer16 (uint16_t data)

void	usingInterrupt (int interruptNumber)

Protected Member Functions
HardwareSPI *	getSPI ()

Protected Attributes
SPISource *	p_source = nullptr

HardwareSPI *	p_spi = nullptr

Detailed Description

SPI wrapper class that provides flexible hardware abstraction.

SPIWrapper is a concrete implementation of the HardwareSPI interface that supports multiple delegation patterns for SPI communication. It can delegate operations to:

An injected HardwareSPI implementation
An SPISource provider that supplies the SPI implementation
A default fallback implementation

This class implements the complete SPI interface including:

Bus initialization and termination (begin/end)
Data transfer operations (8-bit, 16-bit, and buffer transfers)
Transaction management with settings control
Interrupt handling and configuration
Clock, data order, and mode configuration via SPISettings

The wrapper automatically handles null safety and provides appropriate default return values when no underlying SPI implementation is available. It supports both polling and interrupt-driven SPI operations.

A global SPI instance is automatically provided for Arduino compatibility.