SPI_HAL

Data Structures
struct	spi_cfg_t
	SPI Configuation Struct. More...

Macros
#define	SPI_CFG_DEFAULT
	Default Values for SPI in Controller mode.

Functions
void	spi_set_clk_cfg (SPI_REGS_s *SPI_REGS_PTR, SPI_CLKSEL_CLK_SEL_E clk_sel, uint8_t div_ratio)
	This function updates the clock setting use by the SPI.
void	spi_set_moto_mode_cfg (SPI_REGS_s *SPI_REGS_PTR, SPI_MOT_MOD_CNTRL_CLOCK_POLARITY_E clk_polarity, SPI_MOT_MOD_CNTRL_CLOCK_PHASE_E clk_phase, bool parity_en, bool even_partiy)
	This function updates SPI configuration for Moto Mode.
void	spi_set_mode_cfg (SPI_REGS_s *SPI_REGS_PTR, SPI_MODE_CTRL_PERIPHERAL_MODE_E mode, SPI_MODE_CTRL_FRAME_FORMAT_E frame_format, uint8_t data_size, bool msb_first)
	This function configure the SPI mode/type of Operation.
void	spi_start_transaction (SPI_REGS_s *SPI_REGS_PTR)
	This function starts spi transaction.
void	spi_disable (SPI_REGS_s *SPI_REGS_PTR)
	This function disables spi.
void	spi_set_loopback (SPI_REGS_s *SPI_REGS_PTR)
	This function sets SPI loopback.
void	spi_clr_loopback (SPI_REGS_s *SPI_REGS_PTR)
	This function clear SPI loopback.
void	spi_set_tx_ctrl (SPI_REGS_s *SPI_REGS_PTR, uint8_t repeat_tx_data)
	This function set SPI TX ctrl setting.
void	spi_set_rx_ctrl (SPI_REGS_s *SPI_REGS_PTR, uint8_t receive_timeout, uint8_t ignore_rx_cnt, uint8_t dly_sample_on_rx)
	This function set SPI RX ctrl setting.
void	spi_init (SPI_REGS_s *SPI_REGS_PTR, spi_cfg_t *spi_cfg)
	This function initializes the SPI, with Controller/Peripheral Setting.
uint8_t	spi_receive_byte_blocking (SPI_REGS_s *SPI_REGS_PTR)
	Blocking function to recive a single byte.
uint16_t	spi_receive_halfword_blocking (SPI_REGS_s *SPI_REGS_PTR)
	Blocking function to recive a half word.
uint32_t	spi_receive_word_blocking (SPI_REGS_s *SPI_REGS_PTR)
	Blocking function to recive a word.
bool	spi_receive_byte_non_blocking (SPI_REGS_s *SPI_REGS_PTR, uint8_t *byte)
	Non - Blocking function to recieve a byte.
bool	spi_receive_halfword_non_blocking (SPI_REGS_s *SPI_REGS_PTR, uint16_t *halfword)
	Non - Blocking function to recieve a half word.
bool	spi_receive_word_non_blocking (SPI_REGS_s *SPI_REGS_PTR, uint32_t *word)
	Non - Blocking function to recieve a word.
void	spi_transmit_byte_blocking (SPI_REGS_s *SPI_REGS_PTR, uint8_t byte)
	Blocking function to transmit a byte.
void	spi_transmit_halfword_blocking (SPI_REGS_s *SPI_REGS_PTR, uint16_t halfword)
	Blocking function to transmit a halfword.
void	spi_transmit_word_blocking (SPI_REGS_s *SPI_REGS_PTR, uint32_t word)
	Blocking function to transmit a word.
bool	spi_transmit_byte_non_blocking (SPI_REGS_s *SPI_REGS_PTR, uint8_t byte)
	Non - Blocking function to transmit a byte.
bool	spi_transmit_halfword_non_blocking (SPI_REGS_s *SPI_REGS_PTR, uint16_t halfword)
	Non - Blocking function to transmit a halfword.
bool	spi_transmit_word_non_blocking (SPI_REGS_s *SPI_REGS_PTR, uint32_t word)
	Non - Blocking function to transmit word.
uint8_t	spi_rx_fifo_drain_byte (SPI_REGS_s *SPI_REGS_PTR, uint8_t *buffer, uint8_t max_count)
	Non - Blocking function to drain the rx fifo based on max count.
uint8_t	spi_rx_fifo_drain_halfword (SPI_REGS_s *SPI_REGS_PTR, uint16_t *buffer, uint8_t max_count)
	Non - Blocking function to drain the rx fifo based on max count.
uint8_t	spi_rx_fifo_drain_word (SPI_REGS_s *SPI_REGS_PTR, uint32_t *buffer, uint8_t max_count)
	Non - Blocking function to drain the rx fifo based on max count.
uint8_t	spi_tx_fifo_fill_byte_non_blocking (SPI_REGS_s *SPI_REGS_PTR, const uint8_t *buffer, uint8_t max_count)
	Non - Blocking function to fill the tx fifo based on max count.
uint8_t	spi_tx_fifo_fill_halfword_non_blocking (SPI_REGS_s *SPI_REGS_PTR, const uint16_t *buffer, uint8_t max_count)
	Non - Blocking function to fill the tx fifo based on max count.
uint8_t	spi_tx_fifo_fill_word_non_blocking (SPI_REGS_s *SPI_REGS_PTR, const uint32_t *buffer, uint8_t max_count)
	Non - Blocking function to fill the tx fifo based on max count.
void	spi_tx_fifo_fill_byte_blocking (SPI_REGS_s *SPI_REGS_PTR, const uint8_t *buffer, uint8_t max_count)
	Blocking function to fill the tx fifo based on max count.
void	spi_tx_fifo_fill_halfword_blocking (SPI_REGS_s *SPI_REGS_PTR, const uint16_t *buffer, uint8_t max_count)
	Blocking function to fill the tx fifo based on max count.
void	spi_tx_fifo_fill_word_blocking (SPI_REGS_s *SPI_REGS_PTR, const uint32_t *buffer, uint8_t max_count)
	Blocking function to fill the tx fifo based on max count.
void	spi_enable_cs (SPI_REGS_s *SPI_REGS_PTR, bool soft_cs_en, uint8_t cs_sel)
	function to set enable software controlled cs and sel the cs
void	spi_set_soft_cs (SPI_REGS_s *SPI_REGS_PTR)
	function to set soft cs
void	spi_clr_soft_cs (SPI_REGS_s *SPI_REGS_PTR)
	function to set soft cs
bool	spi_is_idle (SPI_REGS_s *SPI_REGS_PTR)
	function to pool for spi idle

Detailed Description

---

Data Structure Documentation

spi_cfg_t

struct spi_cfg_t

SPI Configuation Struct.

Note

This struct contain parameters for initializing SPI while using either in controller or peripheral mode.

Data Fields
SPI_MODE_CTRL_FRAME_FORMAT_E	frame_format
uint8_t	data_size_sel
bool	msb_first
SPI_MOT_MOD_CNTRL_CLOCK_POLARITY_E	clk_polarity
SPI_MOT_MOD_CNTRL_CLOCK_PHASE_E	clk_phase
bool	parity_en
bool	even_partiy
SPI_MODE_CTRL_PERIPHERAL_MODE_E	mode

Macro Definition Documentation

SPI_CFG_DEFAULT

#define SPI_CFG_DEFAULT

Value:

    {                                       \
    .frame_format   = SPI_MODE_CTRL_FRAME_FORMAT_MOTOROLA      ,\
    .data_size_sel  = 8                                        ,\
    .msb_first      = 0                                        ,\
    .clk_polarity   = SPI_MOT_MOD_CNTRL_CLOCK_POLARITY_LOW     ,\
    .clk_phase      = SPI_MOT_MOD_CNTRL_CLOCK_PHASE_LEADING    ,\
    .parity_en      = 0                                        ,\
    .even_partiy    = 0                                        ,\
    .mode           = SPI_MODE_CTRL_PERIPHERAL_MODE_CONTROLLER  \
}

Default Values for SPI in Controller mode.

Function Documentation

spi_set_clk_cfg()

void spi_set_clk_cfg	(	SPI_REGS_s *	SPI_REGS_PTR,
		SPI_CLKSEL_CLK_SEL_E	clk_sel,
		uint8_t	div_ratio )

This function updates the clock setting use by the SPI.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
clk_sel	: enum for clock to be used for SPI
div_ratio	: 8 bit value for the clock divider.

Return values

void

References SPI_REGS_s::CLK_CTRL, SPI_REGS_s::CLK_DIV, SPI_REGS_s::CLKSEL, SPI_CLK_DIV_u::packed_w, and SPI_CLKSEL_u::packed_w.

spi_set_moto_mode_cfg()

void spi_set_moto_mode_cfg	(	SPI_REGS_s *	SPI_REGS_PTR,
		SPI_MOT_MOD_CNTRL_CLOCK_POLARITY_E	clk_polarity,
		SPI_MOT_MOD_CNTRL_CLOCK_PHASE_E	clk_phase,
		bool	parity_en,
		bool	even_partiy )

This function updates SPI configuration for Moto Mode.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
clk_polarity	: enum for clock polarity
clk_phase	: enum for clock phase
parity_en	: set this to enable parity
even_partiy	: set this to enable enable parity

Return values

void

References SPI_REGS_s::MOT_MOD_CNTRL, and SPI_REGS_s::PARITY_CTRL.

Referenced by spi_init().

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spi_set_mode_cfg()

void spi_set_mode_cfg	(	SPI_REGS_s *	SPI_REGS_PTR,
		SPI_MODE_CTRL_PERIPHERAL_MODE_E	mode,
		SPI_MODE_CTRL_FRAME_FORMAT_E	frame_format,
		uint8_t	data_size,
		bool	msb_first )

This function configure the SPI mode/type of Operation.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
mode	: enum for controller or peripheral mode
frame_format	: enum for the type of SPI
data_size	: Input for the size of the data
msb_first	: Set this enable msb first

Return values

void

References SPI_REGS_s::DATAFRAME_CTRL, and SPI_REGS_s::MODE_CTRL.

Referenced by spi_init().

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spi_start_transaction()

void spi_start_transaction

(

SPI_REGS_s *

SPI_REGS_PTR

)

This function starts spi transaction.

Parameters

SPI_REGS_PTR

: pointer to the spi register space

Return values

void

References SPI_REGS_s::MODE_CTRL.

spi_disable()

void spi_disable

(

SPI_REGS_s *

SPI_REGS_PTR

)

This function disables spi.

Parameters

SPI_REGS_PTR

: pointer to the spi register space

Return values

void

References SPI_REGS_s::MODE_CTRL.

spi_set_loopback()

void spi_set_loopback

(

SPI_REGS_s *

SPI_REGS_PTR

)

This function sets SPI loopback.

Parameters

SPI_REGS_PTR

: pointer to the spi register space

Return values

void

References SPI_REGS_s::LOOPBACK_CTRL.

spi_clr_loopback()

void spi_clr_loopback

(

SPI_REGS_s *

SPI_REGS_PTR

)

This function clear SPI loopback.

Parameters

SPI_REGS_PTR

: pointer to the spi register space

Return values

void

References SPI_REGS_s::LOOPBACK_CTRL.

spi_set_tx_ctrl()

void spi_set_tx_ctrl	(	SPI_REGS_s *	SPI_REGS_PTR,
		uint8_t	repeat_tx_data )

This function set SPI TX ctrl setting.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
repeat_tx_data	: number of spi frames to be repeated after fifo is empty

Return values

void

References SPI_REGS_s::TX_CTRL.

spi_set_rx_ctrl()

void spi_set_rx_ctrl	(	SPI_REGS_s *	SPI_REGS_PTR,
		uint8_t	receive_timeout,
		uint8_t	ignore_rx_cnt,
		uint8_t	dly_sample_on_rx )

This function set SPI RX ctrl setting.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
receive_timeout	: timeout for RX not receing any data to generate interrupt. Timeout is specified in number of clk_spi cycles
ignore_rx_cnt	: number of spi frame rx should ignore
dly_sample_on_rx	: the delay on the rx sample for improving stablity at higher clock speeds

Return values

void

References SPI_REGS_s::RX_CTRL.

spi_init()

void spi_init	(	SPI_REGS_s *	SPI_REGS_PTR,
		spi_cfg_t *	spi_cfg )

This function initializes the SPI, with Controller/Peripheral Setting.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
spi_cfg	: configuration for SPI.

Return values

void

References spi_cfg_t::clk_phase, spi_cfg_t::clk_polarity, spi_cfg_t::data_size_sel, spi_cfg_t::even_partiy, spi_cfg_t::frame_format, spi_cfg_t::mode, spi_cfg_t::msb_first, spi_cfg_t::parity_en, spi_set_mode_cfg(), and spi_set_moto_mode_cfg().

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spi_receive_byte_blocking()

uint8_t spi_receive_byte_blocking

(

SPI_REGS_s *

SPI_REGS_PTR

)

Blocking function to recive a single byte.

Parameters

SPI_REGS_PTR

: pointer to the spi register space

Return values

byte	data from the rx fifo

References SPI_RX_FIFO_u::packed_byte, SPI_REGS_s::RX_FIFO, and SPI_REGS_s::STS.

spi_receive_halfword_blocking()

uint16_t spi_receive_halfword_blocking

(

SPI_REGS_s *

SPI_REGS_PTR

)

Blocking function to recive a half word.

Parameters

SPI_REGS_PTR

: pointer to the spi register space

Return values

half	word data from the rx fifo

References SPI_RX_FIFO_u::packed_hw, SPI_REGS_s::RX_FIFO, and SPI_REGS_s::STS.

spi_receive_word_blocking()

uint32_t spi_receive_word_blocking

(

SPI_REGS_s *

SPI_REGS_PTR

)

Blocking function to recive a word.

Parameters

SPI_REGS_PTR

: pointer to the spi register space

Return values

word	data from the rx fifo

References SPI_RX_FIFO_u::packed_w, SPI_REGS_s::RX_FIFO, and SPI_REGS_s::STS.

spi_receive_byte_non_blocking()

bool spi_receive_byte_non_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		uint8_t *	byte )

Non - Blocking function to recieve a byte.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
byte	: pointer to the byte data

Return values

if	data is present in the fifo, true is returned

References SPI_RX_FIFO_u::packed_byte, SPI_REGS_s::RX_FIFO, and SPI_REGS_s::STS.

spi_receive_halfword_non_blocking()

bool spi_receive_halfword_non_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		uint16_t *	halfword )

Non - Blocking function to recieve a half word.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
halfword	: pointer to the halfword data

Return values

if	data is present in the fifo, true is returned

References SPI_RX_FIFO_u::packed_hw, SPI_REGS_s::RX_FIFO, and SPI_REGS_s::STS.

spi_receive_word_non_blocking()

bool spi_receive_word_non_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		uint32_t *	word )

Non - Blocking function to recieve a word.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
word	: pointer to the word data

Return values

if	data is present in the fifo, true is returned

References SPI_RX_FIFO_u::packed_w, SPI_REGS_s::RX_FIFO, and SPI_REGS_s::STS.

spi_transmit_byte_blocking()

void spi_transmit_byte_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		uint8_t	byte )

Blocking function to transmit a byte.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
byte	: byte data to be transmitted

Return values

void

References SPI_TX_FIFO_u::packed_byte, SPI_REGS_s::STS, and SPI_REGS_s::TX_FIFO.

spi_transmit_halfword_blocking()

void spi_transmit_halfword_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		uint16_t	halfword )

Blocking function to transmit a halfword.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
halfword	: halfword data to be transmitted

Return values

void

References SPI_TX_FIFO_u::packed_hw, SPI_REGS_s::STS, and SPI_REGS_s::TX_FIFO.

spi_transmit_word_blocking()

void spi_transmit_word_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		uint32_t	word )

Blocking function to transmit a word.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
word	: word data to be transmitted

Return values

void

References SPI_TX_FIFO_u::packed_w, SPI_REGS_s::STS, and SPI_REGS_s::TX_FIFO.

spi_transmit_byte_non_blocking()

bool spi_transmit_byte_non_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		uint8_t	byte )

Non - Blocking function to transmit a byte.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
byte	: byte data to be transmitted

Return values

True/False

to indicate is the data is transferred succesfully

References SPI_TX_FIFO_u::packed_byte, SPI_REGS_s::STS, and SPI_REGS_s::TX_FIFO.

spi_transmit_halfword_non_blocking()

bool spi_transmit_halfword_non_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		uint16_t	halfword )

Non - Blocking function to transmit a halfword.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
halfword	: halfword data to be transmitted

Return values

True/False

to indicate is the data is transferred succesfully

References SPI_TX_FIFO_u::packed_hw, SPI_REGS_s::STS, and SPI_REGS_s::TX_FIFO.

spi_transmit_word_non_blocking()

bool spi_transmit_word_non_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		uint32_t	word )

Non - Blocking function to transmit word.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
word	: word data to be transmitted

Return values

True/False

to indicate is the data is transferred succesfully

References SPI_TX_FIFO_u::packed_w, SPI_REGS_s::STS, and SPI_REGS_s::TX_FIFO.

spi_rx_fifo_drain_byte()

uint8_t spi_rx_fifo_drain_byte	(	SPI_REGS_s *	SPI_REGS_PTR,
		uint8_t *	buffer,
		uint8_t	max_count )

Non - Blocking function to drain the rx fifo based on max count.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
buffer	: pointer to the byte buffer

Return values

the	number of bytes read

References SPI_RX_FIFO_u::packed_byte, SPI_REGS_s::RX_FIFO, and SPI_REGS_s::STS.

spi_rx_fifo_drain_halfword()

uint8_t spi_rx_fifo_drain_halfword	(	SPI_REGS_s *	SPI_REGS_PTR,
		uint16_t *	buffer,
		uint8_t	max_count )

Non - Blocking function to drain the rx fifo based on max count.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
buffer	: pointer to the halfword buffer

Return values

the	number of halfwords read

References SPI_RX_FIFO_u::packed_hw, SPI_REGS_s::RX_FIFO, and SPI_REGS_s::STS.

spi_rx_fifo_drain_word()

uint8_t spi_rx_fifo_drain_word	(	SPI_REGS_s *	SPI_REGS_PTR,
		uint32_t *	buffer,
		uint8_t	max_count )

Non - Blocking function to drain the rx fifo based on max count.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
buffer	: pointer to the word buffer

Return values

the	number of words read

References SPI_RX_FIFO_u::packed_w, SPI_REGS_s::RX_FIFO, and SPI_REGS_s::STS.

spi_tx_fifo_fill_byte_non_blocking()

uint8_t spi_tx_fifo_fill_byte_non_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		const uint8_t *	buffer,
		uint8_t	max_count )

Non - Blocking function to fill the tx fifo based on max count.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
buffer	: pointer to the byte buffer

Return values

the	number of bytes transmitted

References SPI_TX_FIFO_u::packed_byte, SPI_REGS_s::STS, and SPI_REGS_s::TX_FIFO.

spi_tx_fifo_fill_halfword_non_blocking()

uint8_t spi_tx_fifo_fill_halfword_non_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		const uint16_t *	buffer,
		uint8_t	max_count )

Non - Blocking function to fill the tx fifo based on max count.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
buffer	: pointer to the halfword buffer

Return values

the	number of halfword transmitted

References SPI_TX_FIFO_u::packed_hw, SPI_REGS_s::STS, and SPI_REGS_s::TX_FIFO.

spi_tx_fifo_fill_word_non_blocking()

uint8_t spi_tx_fifo_fill_word_non_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		const uint32_t *	buffer,
		uint8_t	max_count )

Non - Blocking function to fill the tx fifo based on max count.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
buffer	: pointer to the word buffer

Return values

the	number of word transmitted

References SPI_TX_FIFO_u::packed_w, SPI_REGS_s::STS, and SPI_REGS_s::TX_FIFO.

spi_tx_fifo_fill_byte_blocking()

void spi_tx_fifo_fill_byte_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		const uint8_t *	buffer,
		uint8_t	max_count )

Blocking function to fill the tx fifo based on max count.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
buffer	: pointer to the byte buffer

Return values

the	number of bytes transmitted

References SPI_TX_FIFO_u::packed_byte, SPI_REGS_s::STS, and SPI_REGS_s::TX_FIFO.

spi_tx_fifo_fill_halfword_blocking()

void spi_tx_fifo_fill_halfword_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		const uint16_t *	buffer,
		uint8_t	max_count )

Blocking function to fill the tx fifo based on max count.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
buffer	: pointer to the halfword buffer

Return values

the	number of halfword transmitted

References SPI_TX_FIFO_u::packed_hw, SPI_REGS_s::STS, and SPI_REGS_s::TX_FIFO.

spi_tx_fifo_fill_word_blocking()

void spi_tx_fifo_fill_word_blocking	(	SPI_REGS_s *	SPI_REGS_PTR,
		const uint32_t *	buffer,
		uint8_t	max_count )

Blocking function to fill the tx fifo based on max count.

Parameters

SPI_REGS_PTR	: pointer to the spi register space
buffer	: pointer to the word buffer

Return values

the	number of words transmitted

References SPI_TX_FIFO_u::packed_w, SPI_REGS_s::STS, and SPI_REGS_s::TX_FIFO.

spi_enable_cs()

void spi_enable_cs	(	SPI_REGS_s *	SPI_REGS_PTR,
		bool	soft_cs_en,
		uint8_t	cs_sel )

function to set enable software controlled cs and sel the cs

Parameters

SPI_REGS_PTR	: pointer to the spi register space
soft_cs_en	: en to the soft cs
cs_sel	: selects the cs

Return values

void

References SPI_REGS_s::CS_CTRL.

spi_set_soft_cs()

void spi_set_soft_cs

(

SPI_REGS_s *

SPI_REGS_PTR

)

function to set soft cs

Parameters

SPI_REGS_PTR

: pointer to the spi register space

Return values

void

References SPI_REGS_s::CS_CTRL.

spi_clr_soft_cs()

void spi_clr_soft_cs

(

SPI_REGS_s *

SPI_REGS_PTR

)

function to set soft cs

Parameters

SPI_REGS_PTR

: pointer to the spi register space

Return values

void

References SPI_REGS_s::CS_CTRL.

spi_is_idle()

bool spi_is_idle

(

SPI_REGS_s *

SPI_REGS_PTR

)

function to pool for spi idle

Parameters

SPI_REGS_PTR

: pointer to the spi register space

Return values

True/False

is spi is in idle or not

References SPI_REGS_s::INTR_EVENT, SPI_INTR_EVENT_u::packed_w, SPI_INTR_EVENT_IDLE_MASK, and SPI_INTR_EVENT_IDLE_OFS.