Overview

The MCUXpresso SDK provides a peripheral driver for the Sony/Philips Digital Interface (SPDIF) module of MCUXpresso SDK devices.

SPDIF driver includes functional APIs and transactional APIs.

Functional APIs target low-level APIs. Functional APIs can be used for SPDIF initialization/configuration/operation for optimization/customization purpose. Using the functional API requires the knowledge of the SPDIF peripheral and how to organize functional APIs to meet the application requirements. All functional API use the peripheral base address as the first parameter. SPDIF functional operation groups provide the functional API set.

Transactional APIs target high-level APIs. Transactional APIs can be used to enable the peripheral and in the application if the code size and performance of transactional APIs satisfy the requirements. If the code size and performance are a critical requirement, see the transactional API implementation and write a custom code. All transactional APIs use the spdif_handle_t as the first parameter. Initialize the handle by calling the SPDIF_TransferTxCreateHandle() or SPDIF_TransferRxCreateHandle() API.

Transactional APIs support asynchronous transfer. This means that the functions SPDIF_TransferSendNonBlocking() and SPDIF_TransferReceiveNonBlocking() set up the interrupt for data transfer. When the transfer completes, the upper layer is notified through a callback function with the kStatus_SPDIF_TxIdle and kStatus_SPDIF_RxIdle status.

Typical use case

SPDIF Send/receive using an interrupt method

Refer to the driver examples codes located at <SDK_ROOT>/boards/<BOARD>/driver_examples/spdif

SPDIF Send/receive using a DMA method

Refer to the driver examples codes located at <SDK_ROOT>/boards/<BOARD>/driver_examples/spdif

Data Structures
struct	spdif_config_t
	SPDIF user configuration structure. More...

struct	spdif_transfer_t
	SPDIF transfer structure. More...

struct	spdif_handle_t
	SPDIF handle structure. More...

Macros
#define	SPDIF_XFER_QUEUE_SIZE (4U)
	SPDIF transfer queue size, user can refine it according to use case. More...

Typedefs
typedef void(*	spdif_transfer_callback_t )(SPDIF_Type base, spdif_handle_t handle, status_t status, void *userData)
	SPDIF transfer callback prototype.

Enumerations
enum	{ kStatus_SPDIF_RxDPLLLocked = MAKE_STATUS(kStatusGroup_SPDIF, 0), kStatus_SPDIF_TxFIFOError = MAKE_STATUS(kStatusGroup_SPDIF, 1), kStatus_SPDIF_TxFIFOResync = MAKE_STATUS(kStatusGroup_SPDIF, 2), kStatus_SPDIF_RxCnew = MAKE_STATUS(kStatusGroup_SPDIF, 3), kStatus_SPDIF_ValidatyNoGood = MAKE_STATUS(kStatusGroup_SPDIF, 4), kStatus_SPDIF_RxIllegalSymbol = MAKE_STATUS(kStatusGroup_SPDIF, 5), kStatus_SPDIF_RxParityBitError = MAKE_STATUS(kStatusGroup_SPDIF, 6), kStatus_SPDIF_UChannelOverrun = MAKE_STATUS(kStatusGroup_SPDIF, 7), kStatus_SPDIF_QChannelOverrun = MAKE_STATUS(kStatusGroup_SPDIF, 8), kStatus_SPDIF_UQChannelSync = MAKE_STATUS(kStatusGroup_SPDIF, 9), kStatus_SPDIF_UQChannelFrameError = MAKE_STATUS(kStatusGroup_SPDIF, 10), kStatus_SPDIF_RxFIFOError = MAKE_STATUS(kStatusGroup_SPDIF, 11), kStatus_SPDIF_RxFIFOResync = MAKE_STATUS(kStatusGroup_SPDIF, 12), kStatus_SPDIF_LockLoss = MAKE_STATUS(kStatusGroup_SPDIF, 13), kStatus_SPDIF_TxIdle = MAKE_STATUS(kStatusGroup_SPDIF, 14), kStatus_SPDIF_RxIdle = MAKE_STATUS(kStatusGroup_SPDIF, 15), kStatus_SPDIF_QueueFull = MAKE_STATUS(kStatusGroup_SPDIF, 16) }
	SPDIF return status. More...

enum	spdif_rxfull_select_t { kSPDIF_RxFull1Sample = 0x0u, kSPDIF_RxFull4Samples, kSPDIF_RxFull8Samples, kSPDIF_RxFull16Samples }
	SPDIF Rx FIFO full falg select, it decides when assert the rx full flag. More...

enum	spdif_txempty_select_t { kSPDIF_TxEmpty0Sample = 0x0u, kSPDIF_TxEmpty4Samples, kSPDIF_TxEmpty8Samples, kSPDIF_TxEmpty12Samples }
	SPDIF tx FIFO EMPTY falg select, it decides when assert the tx empty flag. More...

enum	spdif_uchannel_source_t { kSPDIF_NoUChannel = 0x0U, kSPDIF_UChannelFromRx = 0x1U, kSPDIF_UChannelFromTx = 0x3U }
	SPDIF U channel source. More...

enum	spdif_gain_select_t { kSPDIF_GAIN_24 = 0x0U, kSPDIF_GAIN_16, kSPDIF_GAIN_12, kSPDIF_GAIN_8, kSPDIF_GAIN_6, kSPDIF_GAIN_4, kSPDIF_GAIN_3 }
	SPDIF clock gain. More...

enum	spdif_tx_source_t { kSPDIF_txFromReceiver = 0x1U, kSPDIF_txNormal = 0x5U }
	SPDIF tx data source. More...

enum	spdif_validity_config_t { kSPDIF_validityFlagAlwaysSet = 0x0U, kSPDIF_validityFlagAlwaysClear }
	SPDIF tx data source. More...

enum	{ kSPDIF_RxDPLLLocked = SPDIF_SIE_LOCK_MASK, kSPDIF_TxFIFOError = SPDIF_SIE_TXUNOV_MASK, kSPDIF_TxFIFOResync = SPDIF_SIE_TXRESYN_MASK, kSPDIF_RxControlChannelChange = SPDIF_SIE_CNEW_MASK, kSPDIF_ValidityFlagNoGood = SPDIF_SIE_VALNOGOOD_MASK, kSPDIF_RxIllegalSymbol = SPDIF_SIE_SYMERR_MASK, kSPDIF_RxParityBitError = SPDIF_SIE_BITERR_MASK, kSPDIF_UChannelReceiveRegisterFull = SPDIF_SIE_URXFUL_MASK, kSPDIF_UChannelReceiveRegisterOverrun = SPDIF_SIE_URXOV_MASK, kSPDIF_QChannelReceiveRegisterFull = SPDIF_SIE_QRXFUL_MASK, kSPDIF_QChannelReceiveRegisterOverrun = SPDIF_SIE_QRXOV_MASK, kSPDIF_UQChannelSync = SPDIF_SIE_UQSYNC_MASK, kSPDIF_UQChannelFrameError = SPDIF_SIE_UQERR_MASK, kSPDIF_RxFIFOError = SPDIF_SIE_RXFIFOUNOV_MASK, kSPDIF_RxFIFOResync = SPDIF_SIE_RXFIFORESYN_MASK, kSPDIF_LockLoss = SPDIF_SIE_LOCKLOSS_MASK, kSPDIF_TxFIFOEmpty = SPDIF_SIE_TXEM_MASK, kSPDIF_RxFIFOFull = SPDIF_SIE_RXFIFOFUL_MASK }
	The SPDIF interrupt enable flag. More...

enum	{ kSPDIF_RxDMAEnable = SPDIF_SCR_DMA_RX_EN_MASK, kSPDIF_TxDMAEnable = SPDIF_SCR_DMA_TX_EN_MASK }
	The DMA request sources. More...

Driver version
#define	FSL_SPDIF_DRIVER_VERSION (MAKE_VERSION(2, 0, 5))
	Version 2.0.5.

Initialization and deinitialization
void	SPDIF_Init (SPDIF_Type base, const spdif_config_t config)
	Initializes the SPDIF peripheral. More...

void	SPDIF_GetDefaultConfig (spdif_config_t *config)
	Sets the SPDIF configuration structure to default values. More...

void	SPDIF_Deinit (SPDIF_Type *base)
	De-initializes the SPDIF peripheral. More...

uint32_t	SPDIF_GetInstance (SPDIF_Type *base)
	Get the instance number for SPDIF. More...

static void	SPDIF_TxFIFOReset (SPDIF_Type *base)
	Resets the SPDIF Tx. More...

static void	SPDIF_RxFIFOReset (SPDIF_Type *base)
	Resets the SPDIF Rx. More...

void	SPDIF_TxEnable (SPDIF_Type *base, bool enable)
	Enables/disables the SPDIF Tx. More...

static void	SPDIF_RxEnable (SPDIF_Type *base, bool enable)
	Enables/disables the SPDIF Rx. More...

Status
static uint32_t	SPDIF_GetStatusFlag (SPDIF_Type *base)
	Gets the SPDIF status flag state. More...

static void	SPDIF_ClearStatusFlags (SPDIF_Type *base, uint32_t mask)
	Clears the SPDIF status flag state. More...

Interrupts
static void	SPDIF_EnableInterrupts (SPDIF_Type *base, uint32_t mask)
	Enables the SPDIF Tx interrupt requests. More...

static void	SPDIF_DisableInterrupts (SPDIF_Type *base, uint32_t mask)
	Disables the SPDIF Tx interrupt requests. More...

DMA Control
static void	SPDIF_EnableDMA (SPDIF_Type *base, uint32_t mask, bool enable)
	Enables/disables the SPDIF DMA requests. More...

static uint32_t	SPDIF_TxGetLeftDataRegisterAddress (SPDIF_Type *base)
	Gets the SPDIF Tx left data register address. More...

static uint32_t	SPDIF_TxGetRightDataRegisterAddress (SPDIF_Type *base)
	Gets the SPDIF Tx right data register address. More...

static uint32_t	SPDIF_RxGetLeftDataRegisterAddress (SPDIF_Type *base)
	Gets the SPDIF Rx left data register address. More...

static uint32_t	SPDIF_RxGetRightDataRegisterAddress (SPDIF_Type *base)
	Gets the SPDIF Rx right data register address. More...

Bus Operations
void	SPDIF_TxSetSampleRate (SPDIF_Type *base, uint32_t sampleRate_Hz, uint32_t sourceClockFreq_Hz)
	Configures the SPDIF Tx sample rate. More...

uint32_t	SPDIF_GetRxSampleRate (SPDIF_Type *base, uint32_t clockSourceFreq_Hz)
	Configures the SPDIF Rx audio format. More...

void	SPDIF_WriteBlocking (SPDIF_Type base, uint8_t buffer, uint32_t size)
	Sends data using a blocking method. More...

static void	SPDIF_WriteLeftData (SPDIF_Type *base, uint32_t data)
	Writes data into SPDIF FIFO. More...

static void	SPDIF_WriteRightData (SPDIF_Type *base, uint32_t data)
	Writes data into SPDIF FIFO. More...

static void	SPDIF_WriteChannelStatusHigh (SPDIF_Type *base, uint32_t data)
	Writes data into SPDIF FIFO. More...

static void	SPDIF_WriteChannelStatusLow (SPDIF_Type *base, uint32_t data)
	Writes data into SPDIF FIFO. More...

void	SPDIF_ReadBlocking (SPDIF_Type base, uint8_t buffer, uint32_t size)
	Receives data using a blocking method. More...

static uint32_t	SPDIF_ReadLeftData (SPDIF_Type *base)
	Reads data from the SPDIF FIFO. More...

static uint32_t	SPDIF_ReadRightData (SPDIF_Type *base)
	Reads data from the SPDIF FIFO. More...

static uint32_t	SPDIF_ReadChannelStatusHigh (SPDIF_Type *base)
	Reads data from the SPDIF FIFO. More...

static uint32_t	SPDIF_ReadChannelStatusLow (SPDIF_Type *base)
	Reads data from the SPDIF FIFO. More...

static uint32_t	SPDIF_ReadQChannel (SPDIF_Type *base)
	Reads data from the SPDIF FIFO. More...

static uint32_t	SPDIF_ReadUChannel (SPDIF_Type *base)
	Reads data from the SPDIF FIFO. More...

Transactional
void	SPDIF_TransferTxCreateHandle (SPDIF_Type base, spdif_handle_t handle, spdif_transfer_callback_t callback, void *userData)
	Initializes the SPDIF Tx handle. More...

void	SPDIF_TransferRxCreateHandle (SPDIF_Type base, spdif_handle_t handle, spdif_transfer_callback_t callback, void *userData)
	Initializes the SPDIF Rx handle. More...

status_t	SPDIF_TransferSendNonBlocking (SPDIF_Type base, spdif_handle_t handle, spdif_transfer_t *xfer)
	Performs an interrupt non-blocking send transfer on SPDIF. More...

status_t	SPDIF_TransferReceiveNonBlocking (SPDIF_Type base, spdif_handle_t handle, spdif_transfer_t *xfer)
	Performs an interrupt non-blocking receive transfer on SPDIF. More...

status_t	SPDIF_TransferGetSendCount (SPDIF_Type base, spdif_handle_t handle, size_t *count)
	Gets a set byte count. More...

status_t	SPDIF_TransferGetReceiveCount (SPDIF_Type base, spdif_handle_t handle, size_t *count)
	Gets a received byte count. More...

void	SPDIF_TransferAbortSend (SPDIF_Type base, spdif_handle_t handle)
	Aborts the current send. More...

void	SPDIF_TransferAbortReceive (SPDIF_Type base, spdif_handle_t handle)
	Aborts the current IRQ receive. More...

void	SPDIF_TransferTxHandleIRQ (SPDIF_Type base, spdif_handle_t handle)
	Tx interrupt handler. More...

void	SPDIF_TransferRxHandleIRQ (SPDIF_Type base, spdif_handle_t handle)
	Tx interrupt handler. More...

Data Structure Documentation

struct spdif_config_t

Data Fields
bool	isTxAutoSync
	If auto sync mechanism open.

bool	isRxAutoSync
	If auto sync mechanism open.

uint8_t	DPLLClkSource
	SPDIF DPLL clock source, range from 0~15, meaning is chip-specific.

uint8_t	txClkSource
	SPDIF tx clock source, range from 0~7, meaning is chip-specific.

spdif_rxfull_select_t	rxFullSelect
	SPDIF rx buffer full select.

spdif_txempty_select_t	txFullSelect
	SPDIF tx buffer empty select.

spdif_uchannel_source_t	uChannelSrc
	U channel source.

spdif_tx_source_t	txSource
	SPDIF tx data source.

spdif_validity_config_t	validityConfig
	Validity flag config.

spdif_gain_select_t	gain
	Rx receive clock measure gain parameter. More...

Field Documentation

spdif_gain_select_t spdif_config_t::gain

struct spdif_transfer_t

Data Fields
uint8_t *	data
	Data start address to transfer. More...

uint8_t *	qdata
	Data buffer for Q channel.

uint8_t *	udata
	Data buffer for C channel.

size_t	dataSize
	Transfer size. More...

Field Documentation

uint8_t* spdif_transfer_t::data

size_t spdif_transfer_t::dataSize

struct _spdif_handle

Data Fields
uint32_t	state
	Transfer status.

spdif_transfer_callback_t	callback
	Callback function called at transfer event.

void *	userData
	Callback parameter passed to callback function.

spdif_transfer_t	spdifQueue [SPDIF_XFER_QUEUE_SIZE]
	Transfer queue storing queued transfer.

size_t	transferSize [SPDIF_XFER_QUEUE_SIZE]
	Data bytes need to transfer.

volatile uint8_t	queueUser
	Index for user to queue transfer.

volatile uint8_t	queueDriver
	Index for driver to get the transfer data and size.

uint8_t	watermark
	Watermark value.

Macro Definition Documentation

#define SPDIF_XFER_QUEUE_SIZE (4U)

Enumeration Type Documentation

anonymous enum

Enumerator
kStatus_SPDIF_RxDPLLLocked	SPDIF Rx PLL locked.
kStatus_SPDIF_TxFIFOError	SPDIF Tx FIFO error.
kStatus_SPDIF_TxFIFOResync	SPDIF Tx left and right FIFO resync.
kStatus_SPDIF_RxCnew	SPDIF Rx status channel value updated.
kStatus_SPDIF_ValidatyNoGood	SPDIF validaty flag not good.
kStatus_SPDIF_RxIllegalSymbol	SPDIF Rx receive illegal symbol.
kStatus_SPDIF_RxParityBitError	SPDIF Rx parity bit error.
kStatus_SPDIF_UChannelOverrun	SPDIF receive U channel overrun.
kStatus_SPDIF_QChannelOverrun	SPDIF receive Q channel overrun.
kStatus_SPDIF_UQChannelSync	SPDIF U/Q channel sync found.
kStatus_SPDIF_UQChannelFrameError	SPDIF U/Q channel frame error.
kStatus_SPDIF_RxFIFOError	SPDIF Rx FIFO error.
kStatus_SPDIF_RxFIFOResync	SPDIF Rx left and right FIFO resync.
kStatus_SPDIF_LockLoss	SPDIF Rx PLL clock lock loss.
kStatus_SPDIF_TxIdle	SPDIF Tx is idle.
kStatus_SPDIF_RxIdle	SPDIF Rx is idle.
kStatus_SPDIF_QueueFull	SPDIF queue full.

enum spdif_rxfull_select_t

Enumerator
kSPDIF_RxFull1Sample	Rx full at least 1 sample in left and right FIFO.
kSPDIF_RxFull4Samples	Rx full at least 4 sample in left and right FIFO.
kSPDIF_RxFull8Samples	Rx full at least 8 sample in left and right FIFO.
kSPDIF_RxFull16Samples	Rx full at least 16 sample in left and right FIFO.

enum spdif_txempty_select_t

Enumerator
kSPDIF_TxEmpty0Sample	Tx empty at most 0 sample in left and right FIFO.
kSPDIF_TxEmpty4Samples	Tx empty at most 4 sample in left and right FIFO.
kSPDIF_TxEmpty8Samples	Tx empty at most 8 sample in left and right FIFO.
kSPDIF_TxEmpty12Samples	Tx empty at most 12 sample in left and right FIFO.

enum spdif_uchannel_source_t

Enumerator
kSPDIF_NoUChannel	No embedded U channel.
kSPDIF_UChannelFromRx	U channel from receiver, it is CD mode.
kSPDIF_UChannelFromTx	U channel from on chip tx.

enum spdif_gain_select_t

Enumerator
kSPDIF_GAIN_24	Gain select is 24.
kSPDIF_GAIN_16	Gain select is 16.
kSPDIF_GAIN_12	Gain select is 12.
kSPDIF_GAIN_8	Gain select is 8.
kSPDIF_GAIN_6	Gain select is 6.
kSPDIF_GAIN_4	Gain select is 4.
kSPDIF_GAIN_3	Gain select is 3.

enum spdif_tx_source_t

Enumerator
kSPDIF_txFromReceiver	Tx data directly through SPDIF receiver.
kSPDIF_txNormal	Normal operation, data from processor.

enum spdif_validity_config_t

Enumerator
kSPDIF_validityFlagAlwaysSet	Outgoing validity flags always set.
kSPDIF_validityFlagAlwaysClear	Outgoing validity flags always clear.

anonymous enum

Enumerator
kSPDIF_RxDPLLLocked	SPDIF DPLL locked.
kSPDIF_TxFIFOError	Tx FIFO underrun or overrun.
kSPDIF_TxFIFOResync	Tx FIFO left and right channel resync.
kSPDIF_RxControlChannelChange	SPDIF Rx control channel value changed.
kSPDIF_ValidityFlagNoGood	SPDIF validity flag no good.
kSPDIF_RxIllegalSymbol	SPDIF receiver found illegal symbol.
kSPDIF_RxParityBitError	SPDIF receiver found parity bit error.
kSPDIF_UChannelReceiveRegisterFull	SPDIF U channel revceive register full.
kSPDIF_UChannelReceiveRegisterOverrun	SPDIF U channel receive register overrun.
kSPDIF_QChannelReceiveRegisterFull	SPDIF Q channel receive reigster full.
kSPDIF_QChannelReceiveRegisterOverrun	SPDIF Q channel receive register overrun.
kSPDIF_UQChannelSync	SPDIF U/Q channel sync found.
kSPDIF_UQChannelFrameError	SPDIF U/Q channel frame error.
kSPDIF_RxFIFOError	SPDIF Rx FIFO underrun/overrun.
kSPDIF_RxFIFOResync	SPDIF Rx left and right FIFO resync.
kSPDIF_LockLoss	SPDIF receiver loss of lock.
kSPDIF_TxFIFOEmpty	SPDIF Tx FIFO empty.
kSPDIF_RxFIFOFull	SPDIF Rx FIFO full.

anonymous enum

Enumerator
kSPDIF_RxDMAEnable	Rx FIFO full.
kSPDIF_TxDMAEnable	Tx FIFO empty.

Function Documentation

void SPDIF_Init	(	SPDIF_Type *	base,
		const spdif_config_t *	config
	)

Ungates the SPDIF clock, resets the module, and configures SPDIF with a configuration structure. The configuration structure can be custom filled or set with default values by SPDIF_GetDefaultConfig().

Note: This API should be called at the beginning of the application to use the SPDIF driver. Otherwise, accessing the SPDIF module can cause a hard fault because the clock is not enabled.

Parameters

base	SPDIF base pointer
config	SPDIF configuration structure.

void SPDIF_GetDefaultConfig ( spdif_config_t * config )

This API initializes the configuration structure for use in SPDIF_Init. The initialized structure can remain unchanged in SPDIF_Init, or it can be modified before calling SPDIF_Init. This is an example.

spdif_config_t config;

SPDIF_GetDefaultConfig(&config);

Parameters

config pointer to master configuration structure

void SPDIF_Deinit ( SPDIF_Type * base )

This API gates the SPDIF clock. The SPDIF module can't operate unless SPDIF_Init is called to enable the clock.

Parameters

base	SPDIF base pointer

uint32_t SPDIF_GetInstance ( SPDIF_Type * base )

Parameters

base	SPDIF base pointer.

static void SPDIF_TxFIFOReset ( SPDIF_Type * base )

inlinestatic

This function makes Tx FIFO in reset mode.

Parameters

base	SPDIF base pointer

static void SPDIF_RxFIFOReset ( SPDIF_Type * base )

inlinestatic

This function enables the software reset and FIFO reset of SPDIF Rx. After reset, clear the reset bit.

Parameters

base	SPDIF base pointer

void SPDIF_TxEnable	(	SPDIF_Type *	base,
		bool	enable
	)

Parameters

base	SPDIF base pointer
enable	True means enable SPDIF Tx, false means disable.

static void SPDIF_RxEnable	(	SPDIF_Type *	base,
		bool	enable
	)

inlinestatic

Parameters

base	SPDIF base pointer
enable	True means enable SPDIF Rx, false means disable.

static uint32_t SPDIF_GetStatusFlag ( SPDIF_Type * base )

inlinestatic

Parameters

base	SPDIF base pointer

Returns: SPDIF status flag value. Use the _spdif_interrupt_enable_t to get the status value needed.

static void SPDIF_ClearStatusFlags	(	SPDIF_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	SPDIF base pointer
mask	State mask. It can be a combination of the _spdif_interrupt_enable_t member. Notice these members cannot be included, as these flags cannot be cleared by writing 1 to these bits: kSPDIF_UChannelReceiveRegisterFull kSPDIF_QChannelReceiveRegisterFull kSPDIF_TxFIFOEmpty kSPDIF_RxFIFOFull

static void SPDIF_EnableInterrupts	(	SPDIF_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	SPDIF base pointer
mask	interrupt source The parameter can be a combination of the following sources if defined. kSPDIF_WordStartInterruptEnable kSPDIF_SyncErrorInterruptEnable kSPDIF_FIFOWarningInterruptEnable kSPDIF_FIFORequestInterruptEnable kSPDIF_FIFOErrorInterruptEnable

static void SPDIF_DisableInterrupts	(	SPDIF_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	SPDIF base pointer
mask	interrupt source The parameter can be a combination of the following sources if defined. kSPDIF_WordStartInterruptEnable kSPDIF_SyncErrorInterruptEnable kSPDIF_FIFOWarningInterruptEnable kSPDIF_FIFORequestInterruptEnable kSPDIF_FIFOErrorInterruptEnable

static void SPDIF_EnableDMA	(	SPDIF_Type *	base,
		uint32_t	mask,
		bool	enable
	)

inlinestatic

Parameters

base	SPDIF base pointer
mask	SPDIF DMA enable mask, The parameter can be a combination of the following sources if defined kSPDIF_RxDMAEnable kSPDIF_TxDMAEnable
enable	True means enable DMA, false means disable DMA.

static uint32_t SPDIF_TxGetLeftDataRegisterAddress ( SPDIF_Type * base )

inlinestatic

This API is used to provide a transfer address for the SPDIF DMA transfer configuration.

Parameters

base	SPDIF base pointer.

Returns: data register address.

static uint32_t SPDIF_TxGetRightDataRegisterAddress ( SPDIF_Type * base )

inlinestatic

This API is used to provide a transfer address for the SPDIF DMA transfer configuration.

Parameters

base	SPDIF base pointer.

Returns: data register address.

static uint32_t SPDIF_RxGetLeftDataRegisterAddress ( SPDIF_Type * base )

inlinestatic

This API is used to provide a transfer address for the SPDIF DMA transfer configuration.

Parameters

base	SPDIF base pointer.

Returns: data register address.

static uint32_t SPDIF_RxGetRightDataRegisterAddress ( SPDIF_Type * base )

inlinestatic

This API is used to provide a transfer address for the SPDIF DMA transfer configuration.

Parameters

base	SPDIF base pointer.

Returns: data register address.

void SPDIF_TxSetSampleRate	(	SPDIF_Type *	base,
		uint32_t	sampleRate_Hz,
		uint32_t	sourceClockFreq_Hz
	)

The audio format can be changed at run-time. This function configures the sample rate.

Parameters

base	SPDIF base pointer.
sampleRate_Hz	SPDIF sample rate frequency in Hz.
sourceClockFreq_Hz	SPDIF tx clock source frequency in Hz.

uint32_t SPDIF_GetRxSampleRate	(	SPDIF_Type *	base,
		uint32_t	clockSourceFreq_Hz
	)

The audio format can be changed at run-time. This function configures the sample rate and audio data format to be transferred.

Parameters

base	SPDIF base pointer.
clockSourceFreq_Hz	SPDIF system clock frequency in hz.

void SPDIF_WriteBlocking	(	SPDIF_Type *	base,
		uint8_t *	buffer,
		uint32_t	size
	)

Note: This function blocks by polling until data is ready to be sent.

Parameters

base	SPDIF base pointer.
buffer	Pointer to the data to be written.
size	Bytes to be written.

static void SPDIF_WriteLeftData	(	SPDIF_Type *	base,
		uint32_t	data
	)

inlinestatic

Parameters

base	SPDIF base pointer.
data	Data needs to be written.

static void SPDIF_WriteRightData	(	SPDIF_Type *	base,
		uint32_t	data
	)

inlinestatic

Parameters

base	SPDIF base pointer.
data	Data needs to be written.

static void SPDIF_WriteChannelStatusHigh	(	SPDIF_Type *	base,
		uint32_t	data
	)

inlinestatic

Parameters

base	SPDIF base pointer.
data	Data needs to be written.

static void SPDIF_WriteChannelStatusLow	(	SPDIF_Type *	base,
		uint32_t	data
	)

inlinestatic

Parameters

base	SPDIF base pointer.
data	Data needs to be written.

void SPDIF_ReadBlocking	(	SPDIF_Type *	base,
		uint8_t *	buffer,
		uint32_t	size
	)

Note: This function blocks by polling until data is ready to be sent.

Parameters

base	SPDIF base pointer.
buffer	Pointer to the data to be read.
size	Bytes to be read.

static uint32_t SPDIF_ReadLeftData ( SPDIF_Type * base )

inlinestatic

Parameters

base	SPDIF base pointer.

Returns: Data in SPDIF FIFO.

static uint32_t SPDIF_ReadRightData ( SPDIF_Type * base )

inlinestatic

Parameters

base	SPDIF base pointer.

Returns: Data in SPDIF FIFO.

static uint32_t SPDIF_ReadChannelStatusHigh ( SPDIF_Type * base )

inlinestatic

Parameters

base	SPDIF base pointer.

Returns: Data in SPDIF FIFO.

static uint32_t SPDIF_ReadChannelStatusLow ( SPDIF_Type * base )

inlinestatic

Parameters

base	SPDIF base pointer.

Returns: Data in SPDIF FIFO.

static uint32_t SPDIF_ReadQChannel ( SPDIF_Type * base )

inlinestatic

Parameters

base	SPDIF base pointer.

Returns: Data in SPDIF FIFO.

static uint32_t SPDIF_ReadUChannel ( SPDIF_Type * base )

inlinestatic

Parameters

base	SPDIF base pointer.

Returns: Data in SPDIF FIFO.

void SPDIF_TransferTxCreateHandle	(	SPDIF_Type *	base,
		spdif_handle_t *	handle,
		spdif_transfer_callback_t	callback,
		void *	userData
	)

This function initializes the Tx handle for the SPDIF Tx transactional APIs. Call this function once to get the handle initialized.

Parameters

base	SPDIF base pointer
handle	SPDIF handle pointer.
callback	Pointer to the user callback function.
userData	User parameter passed to the callback function

void SPDIF_TransferRxCreateHandle	(	SPDIF_Type *	base,
		spdif_handle_t *	handle,
		spdif_transfer_callback_t	callback,
		void *	userData
	)

This function initializes the Rx handle for the SPDIF Rx transactional APIs. Call this function once to get the handle initialized.

Parameters

base	SPDIF base pointer.
handle	SPDIF handle pointer.
callback	Pointer to the user callback function.
userData	User parameter passed to the callback function.

status_t SPDIF_TransferSendNonBlocking	(	SPDIF_Type *	base,
		spdif_handle_t *	handle,
		spdif_transfer_t *	xfer
	)

Note: This API returns immediately after the transfer initiates. Call the SPDIF_TxGetTransferStatusIRQ to poll the transfer status and check whether the transfer is finished. If the return status is not kStatus_SPDIF_Busy, the transfer is finished.

Parameters

base	SPDIF base pointer.
handle	Pointer to the spdif_handle_t structure which stores the transfer state.
xfer	Pointer to the spdif_transfer_t structure.

Return values

kStatus_Success	Successfully started the data receive.
kStatus_SPDIF_TxBusy	Previous receive still not finished.
kStatus_InvalidArgument	The input parameter is invalid.

status_t SPDIF_TransferReceiveNonBlocking	(	SPDIF_Type *	base,
		spdif_handle_t *	handle,
		spdif_transfer_t *	xfer
	)

Note: This API returns immediately after the transfer initiates. Call the SPDIF_RxGetTransferStatusIRQ to poll the transfer status and check whether the transfer is finished. If the return status is not kStatus_SPDIF_Busy, the transfer is finished.

Parameters

base	SPDIF base pointer
handle	Pointer to the spdif_handle_t structure which stores the transfer state.
xfer	Pointer to the spdif_transfer_t structure.

Return values

kStatus_Success	Successfully started the data receive.
kStatus_SPDIF_RxBusy	Previous receive still not finished.
kStatus_InvalidArgument	The input parameter is invalid.

status_t SPDIF_TransferGetSendCount	(	SPDIF_Type *	base,
		spdif_handle_t *	handle,
		size_t *	count
	)

Parameters

base	SPDIF base pointer.
handle	Pointer to the spdif_handle_t structure which stores the transfer state.
count	Bytes count sent.

Return values

kStatus_Success	Succeed get the transfer count.
kStatus_NoTransferInProgress	There is not a non-blocking transaction currently in progress.

status_t SPDIF_TransferGetReceiveCount	(	SPDIF_Type *	base,
		spdif_handle_t *	handle,
		size_t *	count
	)

Parameters

base	SPDIF base pointer.
handle	Pointer to the spdif_handle_t structure which stores the transfer state.
count	Bytes count received.

Return values

kStatus_Success	Succeed get the transfer count.
kStatus_NoTransferInProgress	There is not a non-blocking transaction currently in progress.

void SPDIF_TransferAbortSend	(	SPDIF_Type *	base,
		spdif_handle_t *	handle
	)

Note: This API can be called any time when an interrupt non-blocking transfer initiates to abort the transfer early.

Parameters

base	SPDIF base pointer.
handle	Pointer to the spdif_handle_t structure which stores the transfer state.

void SPDIF_TransferAbortReceive	(	SPDIF_Type *	base,
		spdif_handle_t *	handle
	)

Note: This API can be called when an interrupt non-blocking transfer initiates to abort the transfer early.

Parameters

base	SPDIF base pointer
handle	Pointer to the spdif_handle_t structure which stores the transfer state.

void SPDIF_TransferTxHandleIRQ	(	SPDIF_Type *	base,
		spdif_handle_t *	handle
	)

Parameters

base	SPDIF base pointer.
handle	Pointer to the spdif_handle_t structure.

void SPDIF_TransferRxHandleIRQ	(	SPDIF_Type *	base,
		spdif_handle_t *	handle
	)

Parameters

base	SPDIF base pointer.
handle	Pointer to the spdif_handle_t structure.

Overview

Typical use case

SPDIF Send/receive using an interrupt method

SPDIF Send/receive using a DMA method

Data Structures

Macros

Typedefs

Enumerations

Driver version

Initialization and deinitialization

Status

Interrupts

DMA Control

Bus Operations

Transactional

Data Structure Documentation

Data Fields

Field Documentation

Data Fields

Field Documentation

Data Fields

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation