Functions
void	spi_init (spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel)
	Initialize the SPI peripheral.
void	spi_free (spi_t *obj)
	Release a SPI object.
void	spi_format (spi_t *obj, int bits, int mode, int slave)
	Configure the SPI format.
void	spi_frequency (spi_t *obj, int hz)
	Set the SPI baud rate.

Function Documentation

Configure the SPI format.

Set the number of bits per frame, configure clock polarity and phase, shift order and master/slave mode. The default bit order is MSB.

Parameters:

[in,out]	obj	The SPI object to configure
[in]	bits	The number of bits per frame
[in]	mode	The SPI mode (clock polarity, phase, and shift direction)
[in]	slave	Zero for master mode or non-zero for slave mode

void spi_free ( spi_t * obj )

Release a SPI object.

TODO: spi_free is currently unimplemented This will require reference counting at the C++ level to be safe

Return the pins owned by the SPI object to their reset state Disable the SPI peripheral Disable the SPI clock

Parameters:

[in] obj The SPI object to deinitialize

Set the SPI baud rate.

Actual frequency may differ from the desired frequency due to available dividers and bus clock Configures the SPI peripheral's baud rate

Parameters:

[in,out]	obj	The SPI object to configure
[in]	hz	The baud rate in Hz

Initialize the SPI peripheral.

Configures the pins used by SPI, sets a default format and frequency, and enables the peripheral

Parameters:

SPI Configuration Functions
[Hal]