#include "compiler.h"
#include "sysclk.h"
#include "status_codes.h"
#include "spi.h"
#include "conf_spi_master.h"

Data Structures
struct	spi_device
	Polled SPI device definition. More...

Typedefs
typedef uint8_t	board_spi_select_id_t
	Board Spi Select Id Definition. More...

typedef uint8_t	spi_flags_t
	Default Config Spi Master Delay BCS. More...

Functions
static void	spi_deselect_device (volatile avr32_spi_t spi, struct spi_device device)
	Deselect given device on the SPI bus. More...

void	spi_disable (volatile avr32_spi_t *spi)
	Disables the SPI. More...

void	spi_enable (volatile avr32_spi_t *spi)
	Enables the SPI. More...

bool	spi_is_enabled (volatile avr32_spi_t *spi)
	Tests if the SPI is enabled. More...

bool	spi_is_rx_full (volatile avr32_spi_t *spi)
	Check if the SPI contains a received character. More...

bool	spi_is_rx_ready (volatile avr32_spi_t *spi)
	Checks if all reception is ready. More...

bool	spi_is_tx_empty (volatile avr32_spi_t *spi)
	Checks if all transmissions are complete. More...

bool	spi_is_tx_ready (volatile avr32_spi_t *spi)
	Checks if all transmissions is ready. More...

static void	spi_master_init (volatile avr32_spi_t *spi)
	Initializes the SPI in master mode. More...

void	spi_master_setup_device (volatile avr32_spi_t spi, struct spi_device device, spi_flags_t flags, uint32_t baud_rate, board_spi_select_id_t sel_id)
	Setup a SPI device. More...

status_code_t	spi_read_packet (volatile avr32_spi_t spi, uint8_t data, size_t len)
	Receive a sequence of bytes from a SPI device. More...

static void	spi_read_single (volatile avr32_spi_t spi, uint8_t data)
	Receive one byte from a SPI device. More...

static void	spi_select_device (volatile avr32_spi_t spi, struct spi_device device)
	Select given device on the SPI bus. More...

status_code_t	spi_write_packet (volatile avr32_spi_t spi, const uint8_t data, size_t len)
	Send a sequence of bytes to a SPI device. More...

static void	spi_write_single (volatile avr32_spi_t *spi, uint8_t data)
	Write one byte to a SPI device. More...

typedef uint8_t board_spi_select_id_t

Board Spi Select Id Definition.

typedef uint8_t spi_flags_t

Default Config Spi Master Delay BCS.

Default Config Spi Master Bits per Transfer Definition Default Config Spi Master Delay BCT Default Config Spi Master Delay BS Default Config Spi Master Dummy Field Spi Flags definition

static void spi_deselect_device	(	volatile avr32_spi_t *	spi,
		struct spi_device *	device
	)

inlinestatic

Deselect given device on the SPI bus.

Calls board chip deselect.

Parameters

spi	Base address of the SPI instance.
device	SPI device

Precondition: SPI device must be selected with spi_select_device() first

References spi_device::id, and spi_unselectChip().

void spi_disable ( volatile avr32_spi_t * spi )

Disables the SPI.

Ensures that nothing is transferred while setting up buffers.

Parameters

spi	Base address of the SPI instance.

Warning: This may cause data loss if used on a slave SPI.

void spi_enable ( volatile avr32_spi_t * spi )

Enables the SPI.

Parameters

spi	Base address of the SPI instance.

bool spi_is_enabled ( volatile avr32_spi_t * spi )

Tests if the SPI is enabled.

Parameters

spi	Base address of the SPI instance.

Returns: true if the SPI is enabled, otherwise false.

bool spi_is_rx_full ( volatile avr32_spi_t * spi )

Check if the SPI contains a received character.

Parameters

spi	Base address of the SPI instance.

Returns: 1 if the SPI Receive Holding Register is full, otherwise 0.

bool spi_is_rx_ready ( volatile avr32_spi_t * spi )

Checks if all reception is ready.

Parameters

spi	Base address of the SPI instance.

Returns: 1 if the SPI Receiver is ready, otherwise 0.

Referenced by spi_read_packet().

bool spi_is_tx_empty ( volatile avr32_spi_t * spi )

Checks if all transmissions are complete.

Parameters

spi	Base address of the SPI instance.

Returns: Status.

Return values

1	All transmissions complete.
0	Transmissions not complete.

bool spi_is_tx_ready ( volatile avr32_spi_t * spi )

Checks if all transmissions is ready.

Parameters

spi	Base address of the SPI instance.

Returns: Status.

Return values

1	All transmissions complete.
0	Transmissions not complete.

Referenced by spi_read_packet(), and spi_write_packet().

static void spi_master_init ( volatile avr32_spi_t * spi )

inlinestatic

Initializes the SPI in master mode.

Parameters

spi	Base address of the SPI instance.

References CONFIG_SPI_MASTER_DELAY_BCS, spi_disable_chipselect_decoding(), spi_disable_loopback(), spi_disable_modfault(), spi_disable_variable_chipselect(), spi_reset(), spi_set_chipselect(), spi_set_delay(), spi_set_master_mode(), sysclk_enable_pba_module(), SYSCLK_SPI0, and SYSCLK_SPI1.

Referenced by sd_mmc_spi_init().

void spi_master_setup_device	(	volatile avr32_spi_t *	spi,
		struct spi_device *	device,
		spi_flags_t	flags,
		uint32_t	baud_rate,
		board_spi_select_id_t	sel_id
	)

Setup a SPI device.

The returned device descriptor structure must be passed to the driver whenever that device should be used as current slave device.

Parameters

spi	Base address of the SPI instance.
device	Pointer to SPI device struct that should be initialized.
flags	SPI configuration flags. Common flags for all implementations are the SPI modes SPI_MODE_0 ... SPI_MODE_3.
baud_rate	Baud rate for communication with slave device in Hz.
sel_id	Board specific select id

References CONFIG_SPI_MASTER_BITS_PER_TRANSFER, CONFIG_SPI_MASTER_DELAY_BCT, CONFIG_SPI_MASTER_DELAY_BS, getBaudDiv(), spi_device::id, spi_enable_active_mode(), spi_set_baudrate_register(), spi_set_bits_per_transfer(), spi_set_chipselect_delay_bct(), spi_set_chipselect_delay_bs(), spi_set_mode(), and sysclk_get_peripheral_bus_hz().

status_code_t spi_read_packet	(	volatile avr32_spi_t *	spi,
		uint8_t *	data,
		size_t	len
	)

Receive a sequence of bytes from a SPI device.

All bytes sent out on SPI bus are sent as value 0.

Parameters

spi	Base address of the SPI instance.
data	Data buffer to read
len	Length of data

Precondition: SPI device must be selected with spi_select_device() first

References CONFIG_SPI_MASTER_DUMMY, ERR_TIMEOUT, spi_is_rx_ready(), spi_is_tx_ready(), spi_read_single(), SPI_TIMEOUT, spi_write_single(), and STATUS_OK.

static void spi_read_single	(	volatile avr32_spi_t *	spi,
		uint8_t *	data
	)

inlinestatic

Receive one byte from a SPI device.

Parameters

spi	Base address of the SPI instance.
data	Data to read

References spi_get().

Referenced by spi_read_packet().

static void spi_select_device	(	volatile avr32_spi_t *	spi,
		struct spi_device *	device
	)

inlinestatic

Select given device on the SPI bus.

Set device specific setting and calls board chip select.

Parameters

spi	Base address of the SPI instance.
device	SPI device

References spi_device::id, and spi_selectChip().

status_code_t spi_write_packet	(	volatile avr32_spi_t *	spi,
		const uint8_t *	data,
		size_t	len
	)

Send a sequence of bytes to a SPI device.

Received bytes on the SPI bus are discarded.

Parameters

spi	Base address of the SPI instance.
data	Data buffer to write
len	Length of data

Precondition: SPI device must be selected with spi_select_device() first

References ERR_TIMEOUT, spi_is_tx_ready(), SPI_TIMEOUT, spi_write_single(), and STATUS_OK.

static void spi_write_single	(	volatile avr32_spi_t *	spi,
		uint8_t	data
	)

inlinestatic

Write one byte to a SPI device.

Parameters

spi	Base address of the SPI instance.
data	Data to write

References spi_put().

Referenced by spi_read_packet(), and spi_write_packet().

Microchip® Advanced Software Framework

Data Structures

Typedefs

Functions