SPI

Collaboration diagram for SPI:

Modules
	spi role definition
	spi mode definition
	spi data width definition
	spi bit order definition
	spi byte order definition
	dbi interrupt status definition
	spi interrupt clear definition
	spi feature control cmd definition

Data Structures
struct	bflb_spi_config_s
	SPI configuration structure. More...

Functions
void	bflb_spi_init (struct bflb_device_s *dev, const struct bflb_spi_config_s *config)
	Initialize spi. More...
void	bflb_spi_deinit (struct bflb_device_s *dev)
	Deinitialize spi. More...
void	bflb_spi_link_txdma (struct bflb_device_s *dev, bool enable)
	Enable spi tx dma. More...
void	bflb_spi_link_rxdma (struct bflb_device_s *dev, bool enable)
	Enable spi rx dma. More...
uint32_t	bflb_spi_poll_send (struct bflb_device_s *dev, uint32_t data)
	Send and receive one data on spi. More...
int	bflb_spi_poll_exchange (struct bflb_device_s *dev, const void *txbuffer, void *rxbuffer, size_t nbytes)
	Send and receive a block of data on spi. More...
bool	bflb_spi_isbusy (struct bflb_device_s *dev)
	Check if spi is busy. More...
void	bflb_spi_txint_mask (struct bflb_device_s *dev, bool mask)
	Enable or disable spi rx fifo threhold interrupt. More...
void	bflb_spi_rxint_mask (struct bflb_device_s *dev, bool mask)
	Enable or disable spi rx fifo threhold interrupt. More...
void	bflb_spi_tcint_mask (struct bflb_device_s *dev, bool mask)
	Enable or disable spi transfer done interrupt. More...
void	bflb_spi_errint_mask (struct bflb_device_s *dev, bool mask)
	Enable or disable spi error interrupt. More...
uint32_t	bflb_spi_get_intstatus (struct bflb_device_s *dev)
	Get spi interrupt status. More...
void	bflb_spi_int_clear (struct bflb_device_s *dev, uint32_t int_clear)
	Clear spi interrupt status. More...
int	bflb_spi_feature_control (struct bflb_device_s *dev, int cmd, size_t arg)
	Control spi feature. More...

Detailed Description

Function Documentation

bflb_spi_deinit()

void bflb_spi_deinit

(

struct bflb_device_s *

dev

)

Deinitialize spi.

Parameters

[in]

dev

device handle

bflb_spi_errint_mask()

void bflb_spi_errint_mask	(	struct bflb_device_s *	dev,
		bool	mask
	)

Enable or disable spi error interrupt.

Parameters

[in]	dev	device handle
[in]	mask	true means disable, false means enable

bflb_spi_feature_control()

int bflb_spi_feature_control	(	struct bflb_device_s *	dev,
		int	cmd,
		size_t	arg
	)

Control spi feature.

Parameters

[in]	dev	device handle
[in]	cmd	feature command, use spi feature control cmd definition
[in]	arg	user data

Returns

A negated errno value on failure.

bflb_spi_get_intstatus()

uint32_t bflb_spi_get_intstatus

(

struct bflb_device_s *

dev

)

Get spi interrupt status.

Parameters

[in]

dev

device handle

Returns

interrupt status, use dbi interrupt status definition

bflb_spi_init()

void bflb_spi_init	(	struct bflb_device_s *	dev,
		const struct bflb_spi_config_s *	config
	)

Initialize spi.

Parameters

[in]	dev	device handle
[in]	config	pointer to save spi config

bflb_spi_int_clear()

void bflb_spi_int_clear	(	struct bflb_device_s *	dev,
		uint32_t	int_clear
	)

Clear spi interrupt status.

Parameters

[in]	dev	device handle
[in]	int_clear	clear value, use spi interrupt clear definition

bflb_spi_isbusy()

bool bflb_spi_isbusy

(

struct bflb_device_s *

dev

)

Check if spi is busy.

Parameters

[in]

dev

device handle

Returns

true means busy, otherwise not.

bflb_spi_link_rxdma()

void bflb_spi_link_rxdma	(	struct bflb_device_s *	dev,
		bool	enable
	)

Enable spi rx dma.

Parameters

[in]	dev	device handle
[in]	enable	true means enable, otherwise disable.

bflb_spi_link_txdma()

void bflb_spi_link_txdma	(	struct bflb_device_s *	dev,
		bool	enable
	)

Enable spi tx dma.

Parameters

[in]	dev	device handle
[in]	enable	true means enable, otherwise disable.

bflb_spi_poll_exchange()

int bflb_spi_poll_exchange	(	struct bflb_device_s *	dev,
		const void *	txbuffer,
		void *	rxbuffer,
		size_t	nbytes
	)

Send and receive a block of data on spi.

Parameters

[in]	dev	device handle
[in]	txbuffer	pointer to send buffer
[in]	rxbuffer	pointer to receive buffer
[in]	nbytes	bytes to send

Returns

A negated errno value on failure.

bflb_spi_poll_send()

uint32_t bflb_spi_poll_send	(	struct bflb_device_s *	dev,
		uint32_t	data
	)

Send and receive one data on spi.

Parameters

[in]	dev	device handle
[in]	data	data to send

Returns

receive data

bflb_spi_rxint_mask()

void bflb_spi_rxint_mask	(	struct bflb_device_s *	dev,
		bool	mask
	)

Enable or disable spi rx fifo threhold interrupt.

Parameters

[in]	dev	device handle
[in]	mask	true means disable, false means enable

bflb_spi_tcint_mask()

void bflb_spi_tcint_mask	(	struct bflb_device_s *	dev,
		bool	mask
	)

Enable or disable spi transfer done interrupt.

Parameters

[in]	dev	device handle
[in]	mask	true means disable, false means enable

bflb_spi_txint_mask()

void bflb_spi_txint_mask	(	struct bflb_device_s *	dev,
		bool	mask
	)

Enable or disable spi rx fifo threhold interrupt.

Parameters

[in]	dev	device handle
[in]	mask	true means disable, false means enable