Definition of the Arduino 'SPI' interface. More...

Detailed Description

Definition of the Arduino 'SPI' interface.

Author: Marian Buschsieweke maria.nosp@m.n.bu.nosp@m.schsi.nosp@m.ewek.nosp@m.e@ovg.nosp@m.u.de

Definition in file spiport.hpp.

#include "arduino_board.h"
#include "byteorder.h"
#include "periph/spi.h"
#include "rmutex.h"

Include dependency graph for spiport.hpp:

Data Structures
class	SPISettings
	Arduino SPI configuration interface. More...

class	SPIClass
	Arduino SPI interface. More...

Variables
SPIClass	SPI
	: Instance of the SPI interface as required by the Arduino API

Arduino compatible SPI modes
#define	SPI_MODE0 (0)
	CPOL=0, CPHA=0.

#define	SPI_MODE1 (1)
	CPOL=0, CPHA=1.

#define	SPI_MODE2 (2)
	CPOL=1, CPHA=0.

#define	SPI_MODE3 (3)
	CPOL=1, CPHA=1.

Arduino compatible SPI frequency selection via clock divider
This API assumes the library was targeting a 16 MHz Arduino. It will choose the SPI clock frequency matching the requested frequency best, but never a frequency greater than the one it would have on Arduinos.
#define	SPI_CLOCK_DIV2 (0)
	Best match for 8 MHz: 5 MHz.

#define	SPI_CLOCK_DIV4 (1)
	Best match for 4 MHz: 1 MHz.

#define	SPI_CLOCK_DIV8 (1)
	Best match for 2 MHz: 1 MHz.

#define	SPI_CLOCK_DIV16 (1)
	Best match for 1 MHz: 1 MHz.

#define	SPI_CLOCK_DIV32 (2)
	Best match for 500 kHz: 400 kHz.

#define	SPI_CLOCK_DIV64 (3)
	Best match for 250 kHZ: 100 kHz.

#define	SPI_CLOCK_DIV128 (3)
	Best match for 125 kHz: 100 kHz.

Arduino compatible bit order values for SPI
#define	MSBFIRST (1)
	most significat bit first

Data Structures