Overview

Data Structures
struct	_asrc_channel_pair_config
	asrc channel pair configuation More...

struct	_asrc_transfer
	SAI transfer structure. More...

struct	_asrc_in_handle
	asrc in handler More...

struct	_asrc_out_handle
	output handler More...

struct	_asrc_handle
	ASRC handle structure. More...

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

#define	FSL_ASRC_CHANNEL_PAIR_COUNT (4U)
	ASRC channel pair count.

#define	FSL_ASRC_CHANNEL_PAIR_FIFO_DEPTH (64U)
	ASRC FIFO depth.

#define	ASRC_ASRCTR_AT_MASK(index) ((uint32_t)1U << (ASRC_ASRCTR_ATSA_SHIFT + (uint32_t)(index)))
	ASRC register access macro.

Typedefs
typedef enum _asrc_channel_pair	asrc_channel_pair_t
	ASRC channel pair mask.

typedef enum _asrc_ratio	asrc_ratio_t
	ASRC ideal ratio.

typedef enum _asrc_audio_channel	asrc_audio_channel_t
	Number of channels in audio data.

typedef enum _asrc_data_width	asrc_data_width_t
	data width

typedef enum _asrc_data_align	asrc_data_align_t
	data alignment

typedef enum _asrc_sign_extension	asrc_sign_extension_t
	sign extension

typedef struct _asrc_channel_pair_config	asrc_channel_pair_config_t
	asrc channel pair configuation

typedef struct _asrc_transfer	asrc_transfer_t
	SAI transfer structure.

typedef struct _asrc_handle	asrc_handle_t
	asrc handler

typedef void(*	asrc_transfer_callback_t )(ASRC_Type base, asrc_handle_t handle, status_t status, void *userData)
	ASRC transfer callback prototype.

typedef struct _asrc_in_handle	asrc_in_handle_t
	asrc in handler

typedef struct _asrc_out_handle	asrc_out_handle_t
	output handler

Enumerations
enum	{ kStatus_ASRCIdle = MAKE_STATUS(kStatusGroup_ASRC, 0), kStatus_ASRCInIdle = MAKE_STATUS(kStatusGroup_ASRC, 1), kStatus_ASRCOutIdle = MAKE_STATUS(kStatusGroup_ASRC, 2), kStatus_ASRCBusy = MAKE_STATUS(kStatusGroup_ASRC, 3), kStatus_ASRCInvalidArgument = MAKE_STATUS(kStatusGroup_ASRC, 4), kStatus_ASRCClockConfigureFailed = MAKE_STATUS(kStatusGroup_ASRC, 5), kStatus_ASRCChannelPairConfigureFailed = MAKE_STATUS(kStatusGroup_ASRC, 6), kStatus_ASRCConvertError = MAKE_STATUS(kStatusGroup_ASRC, 7), kStatus_ASRCNotSupport = MAKE_STATUS(kStatusGroup_ASRC, 8), kStatus_ASRCQueueFull = MAKE_STATUS(kStatusGroup_ASRC, 9), kStatus_ASRCOutQueueIdle = MAKE_STATUS(kStatusGroup_ASRC, 10), kStatus_ASRCInQueueIdle = MAKE_STATUS(kStatusGroup_ASRC, 11) }
	ASRC return status. More...

enum	_asrc_channel_pair { kASRC_ChannelPairA = 0, kASRC_ChannelPairB = 1, kASRC_ChannelPairC = 2 }
	ASRC channel pair mask. More...

enum	{ kASRC_SampleRate_8000HZ = 8000U, kASRC_SampleRate_11025HZ = 11025U, kASRC_SampleRate_12000HZ = 12000U, kASRC_SampleRate_16000HZ = 16000U, kASRC_SampleRate_22050HZ = 22050U, kASRC_SampleRate_24000HZ = 24000U, kASRC_SampleRate_30000HZ = 30000U, kASRC_SampleRate_32000HZ = 32000U, kASRC_SampleRate_44100HZ = 44100U, kASRC_SampleRate_48000HZ = 48000U, kASRC_SampleRate_64000HZ = 64000U, kASRC_SampleRate_88200HZ = 88200U, kASRC_SampleRate_96000HZ = 96000U, kASRC_SampleRate_128000HZ = 128000U, kASRC_SampleRate_176400HZ = 176400U, kASRC_SampleRate_192000HZ = 192000U }
	ASRC support sample rate. More...

enum	{ kASRC_FPInWaitStateInterruptEnable = ASRC_ASRIER_AFPWE_MASK, kASRC_OverLoadInterruptMask = ASRC_ASRIER_AOLIE_MASK, kASRC_DataOutputCInterruptMask = ASRC_ASRIER_ADOEC_MASK, kASRC_DataOutputBInterruptMask = ASRC_ASRIER_ADOEB_MASK, kASRC_DataOutputAInterruptMask = ASRC_ASRIER_ADOEA_MASK, kASRC_DataInputCInterruptMask = ASRC_ASRIER_ADIEC_MASK, kASRC_DataInputBInterruptMask = ASRC_ASRIER_ADIEB_MASK, kASRC_DataInputAInterruptMask = ASRC_ASRIER_ADIEA_MASK }
	The ASRC interrupt enable flag. More...

enum	{ kASRC_StatusDSLCounterReady = ASRC_ASRSTR_DSLCNT_MASK, kASRC_StatusTaskQueueOverLoad = ASRC_ASRSTR_ATQOL_MASK, kASRC_StatusPairCOutputOverLoad = ASRC_ASRSTR_AOOLC_MASK, kASRC_StatusPairBOutputOverLoad = ASRC_ASRSTR_AOOLB_MASK, kASRC_StatusPairAOutputOverLoad = ASRC_ASRSTR_AOOLA_MASK, kASRC_StatusPairCInputOverLoad = ASRC_ASRSTR_AIOLC_MASK, kASRC_StatusPairBInputOverLoad = ASRC_ASRSTR_AIOLB_MASK, kASRC_StatusPairAInputOverLoad = ASRC_ASRSTR_AIOLA_MASK, kASRC_StatusPairCOutputOverflow = ASRC_ASRSTR_AODOC_MASK, kASRC_StatusPairBOutputOverflow = ASRC_ASRSTR_AODOB_MASK, kASRC_StatusPairAOutputOverflow = ASRC_ASRSTR_AODOA_MASK, kASRC_StatusPairCInputUnderflow = ASRC_ASRSTR_AIDUC_MASK, kASRC_StatusPairBInputUnderflow = ASRC_ASRSTR_AIDUB_MASK, kASRC_StatusPairAInputUnderflow = ASRC_ASRSTR_AIDUA_MASK, kASRC_StatusFPInWaitState = ASRC_ASRSTR_FPWT_MASK, kASRC_StatusOverloadError = ASRC_ASRSTR_AOLE_MASK, kASRC_StatusInputError, kASRC_StatusOutputError, kASRC_StatusPairCOutputReady = ASRC_ASRSTR_AODFC_MASK, kASRC_StatusPairBOutputReady = ASRC_ASRSTR_AODFB_MASK, kASRC_StatusPairAOutputReady = ASRC_ASRSTR_AODFA_MASK, kASRC_StatusPairCInputReady = ASRC_ASRSTR_AIDEC_MASK, kASRC_StatusPairBInputReady = ASRC_ASRSTR_AIDEB_MASK, kASRC_StatusPairAInputReady = ASRC_ASRSTR_AIDEA_MASK, kASRC_StatusPairAInterrupt = kASRC_StatusPairAInputReady \| kASRC_StatusPairAOutputReady, kASRC_StatusPairBInterrupt = kASRC_StatusPairBInputReady \| kASRC_StatusPairBOutputReady, kASRC_StatusPairCInterrupt = kASRC_StatusPairCInputReady \| kASRC_StatusPairCOutputReady }
	The ASRC interrupt status. More...

enum	{ kASRC_OutputFifoNearFull = ASRC_ASRFSTA_OAFA_MASK, kASRC_InputFifoNearEmpty = ASRC_ASRFSTA_IAEA_MASK }
	ASRC channel pair status. More...

enum	_asrc_ratio { kASRC_RatioNotUsed = 0U, kASRC_RatioUseInternalMeasured, kASRC_RatioUseIdealRatio }
	ASRC ideal ratio. More...

enum	_asrc_audio_channel { kASRC_ChannelsNumber1 = 1U, kASRC_ChannelsNumber2 = 2U, kASRC_ChannelsNumber3 = 3U, kASRC_ChannelsNumber4 = 4U, kASRC_ChannelsNumber5 = 5U, kASRC_ChannelsNumber6 = 6U, kASRC_ChannelsNumber7 = 7U, kASRC_ChannelsNumber8 = 8U, kASRC_ChannelsNumber9 = 9U, kASRC_ChannelsNumber10 = 10U }
	Number of channels in audio data. More...

enum	_asrc_data_width { kASRC_DataWidth24Bit = 0U, kASRC_DataWidth16Bit = 1U, kASRC_DataWidth8Bit = 2U }
	data width More...

enum	_asrc_data_align { kASRC_DataAlignMSB = 1U, kASRC_DataAlignLSB = 0U }
	data alignment More...

enum	_asrc_sign_extension { kASRC_NoSignExtension = 0U, kASRC_SignExtension = 1U }
	sign extension More...

Driver version
#define	FSL_ASRC_DRIVER_VERSION (MAKE_VERSION(2, 1, 3))
	Version 2.1.3.

Initialization and deinitialization
uint32_t	ASRC_GetInstance (ASRC_Type *base)
	Get instance number of the ASRC peripheral. More...

void	ASRC_Init (ASRC_Type *base, uint32_t asrcPeripheralClock_Hz)
	brief Initializes the asrc peripheral. More...

void	ASRC_Deinit (ASRC_Type *base)
	De-initializes the ASRC peripheral. More...

void	ASRC_SoftwareReset (ASRC_Type *base)
	Do software reset . More...

status_t	ASRC_SetChannelPairConfig (ASRC_Type base, asrc_channel_pair_t channelPair, asrc_channel_pair_config_t config, uint32_t inputSampleRate, uint32_t outputSampleRate)
	ASRC configure channel pair. More...

uint32_t	ASRC_GetOutSamplesSize (ASRC_Type *base, asrc_channel_pair_t channelPair, uint32_t inSampleRate, uint32_t outSampleRate, uint32_t inSamplesize)
	Get output sample buffer size. More...

uint32_t	ASRC_MapSamplesWidth (ASRC_Type base, asrc_channel_pair_t channelPair, uint32_t inWidth, uint32_t *outWidth)
	Map register sample width to real sample width. More...

uint32_t	ASRC_GetRemainFifoSamples (ASRC_Type base, asrc_channel_pair_t channelPair, uint32_t buffer, uint32_t outSampleWidth, uint32_t remainSamples)
	Get left samples in fifo. More...

static void	ASRC_ModuleEnable (ASRC_Type *base, bool enable)
	ASRC module enable. More...

static void	ASRC_ChannelPairEnable (ASRC_Type *base, asrc_channel_pair_t channelPair, bool enable)
	ASRC enable channel pair. More...

Interrupts
static void	ASRC_EnableInterrupt (ASRC_Type *base, uint32_t mask)
	ASRC interrupt enable This function enable the ASRC interrupt with the provided mask. More...

static void	ASRC_DisableInterrupt (ASRC_Type *base, uint32_t mask)
	ASRC interrupt disable This function disable the ASRC interrupt with the provided mask. More...

Status
static uint32_t	ASRC_GetStatus (ASRC_Type *base)
	Gets the ASRC status flag state. More...

static bool	ASRC_GetChannelPairInitialStatus (ASRC_Type *base, asrc_channel_pair_t channel)
	Gets the ASRC channel pair initialization state. More...

static uint32_t	ASRC_GetChannelPairFifoStatus (ASRC_Type *base, asrc_channel_pair_t channelPair)
	Gets the ASRC channel A fifo a status flag state. More...

Bus Operations
static void	ASRC_ChannelPairWriteData (ASRC_Type *base, asrc_channel_pair_t channelPair, uint32_t data)
	Writes data into ASRC channel pair FIFO. More...

static uint32_t	ASRC_ChannelPairReadData (ASRC_Type *base, asrc_channel_pair_t channelPair)
	Read data from ASRC channel pair FIFO. More...

static uint32_t	ASRC_GetInputDataRegisterAddress (ASRC_Type *base, asrc_channel_pair_t channelPair)
	Get input data fifo address. More...

static uint32_t	ASRC_GetOutputDataRegisterAddress (ASRC_Type *base, asrc_channel_pair_t channelPair)
	Get output data fifo address. More...

status_t	ASRC_SetIdealRatioConfig (ASRC_Type *base, asrc_channel_pair_t channelPair, uint32_t inputSampleRate, uint32_t outputSampleRate)
	ASRC configure ideal ratio. More...

Transactional
status_t	ASRC_TransferSetChannelPairConfig (ASRC_Type base, asrc_handle_t handle, asrc_channel_pair_config_t *config, uint32_t inputSampleRate, uint32_t outputSampleRate)
	ASRC configure channel pair. More...

void	ASRC_TransferCreateHandle (ASRC_Type base, asrc_handle_t handle, asrc_channel_pair_t channelPair, asrc_transfer_callback_t inCallback, asrc_transfer_callback_t outCallback, void *userData)
	Initializes the ASRC handle. More...

status_t	ASRC_TransferNonBlocking (ASRC_Type base, asrc_handle_t handle, asrc_transfer_t *xfer)
	Performs an interrupt non-blocking convert on asrc. More...

status_t	ASRC_TransferBlocking (ASRC_Type base, asrc_channel_pair_t channelPair, asrc_transfer_t xfer)
	Performs an blocking convert on asrc. More...

status_t	ASRC_TransferGetConvertedCount (ASRC_Type base, asrc_handle_t handle, size_t *count)
	Get converted byte count. More...

void	ASRC_TransferAbortConvert (ASRC_Type base, asrc_handle_t handle)
	Aborts the current convert. More...

void	ASRC_TransferTerminateConvert (ASRC_Type base, asrc_handle_t handle)
	Terminate all ASRC convert. More...

void	ASRC_TransferHandleIRQ (ASRC_Type base, asrc_handle_t handle)
	ASRC convert interrupt handler. More...

Data Structure Documentation

struct _asrc_channel_pair_config

Data Fields
asrc_audio_channel_t	audioDataChannels
	audio data channel numbers

asrc_clock_source_t	inClockSource
	input clock source, reference the clock source definition in SOC header file

uint32_t	inSourceClock_Hz
	input source clock frequency

asrc_clock_source_t	outClockSource
	output clock source, reference the clock source definition in SOC header file

uint32_t	outSourceClock_Hz
	output source clock frequency

asrc_ratio_t	sampleRateRatio
	sample rate ratio type

asrc_data_width_t	inDataWidth
	input data width

asrc_data_align_t	inDataAlign
	input data alignment

asrc_data_width_t	outDataWidth
	output data width

asrc_data_align_t	outDataAlign
	output data alignment

asrc_sign_extension_t	outSignExtension
	output extension

uint8_t	outFifoThreshold
	output fifo threshold

uint8_t	inFifoThreshold
	input fifo threshold

bool	bufStallWhenFifoEmptyFull
	stall Pair A conversion in case of Buffer near empty full condition

struct _asrc_transfer

Data Fields
void *	inData
	Data address to convert. More...

size_t	inDataSize
	input data size. More...

void *	outData
	Data address to store converted data.

size_t	outDataSize
	output data size. More...

Field Documentation

void* _asrc_transfer::inData

size_t _asrc_transfer::inDataSize

size_t _asrc_transfer::outDataSize

struct _asrc_in_handle

Data Fields
asrc_transfer_callback_t	callback
	Callback function called at convert complete.

uint32_t	sampleWidth
	data width

uint32_t	sampleMask
	data mask

uint32_t	fifoThreshold
	fifo threshold

uint8_t *	asrcQueue [ASRC_XFER_QUEUE_SIZE]
	Transfer queue storing queued transfer.

size_t	transferSamples [ASRC_XFER_QUEUE_SIZE]
	Data bytes need to convert.

volatile uint8_t	queueUser
	Index for user to queue transfer.

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

struct _asrc_out_handle

Data Fields
asrc_transfer_callback_t	callback
	Callback function called at convert complete.

uint32_t	sampleWidth
	data width

uint32_t	fifoThreshold
	fifo threshold

uint8_t *	asrcQueue [ASRC_XFER_QUEUE_SIZE]
	Transfer queue storing queued transfer.

size_t	transferSamples [ASRC_XFER_QUEUE_SIZE]
	Data bytes need to convert.

volatile uint8_t	queueUser
	Index for user to queue transfer.

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

struct _asrc_handle

Data Fields
ASRC_Type *	base
	base address

uint32_t	state
	Transfer status.

void *	userData
	Callback parameter passed to callback function.

asrc_audio_channel_t	audioDataChannels
	audio channel number

asrc_channel_pair_t	channelPair
	channel pair mask

asrc_in_handle_t	in
	asrc input handler

asrc_out_handle_t	out
	asrc output handler

Macro Definition Documentation

#define ASRC_XFER_QUEUE_SIZE (4U)

Enumeration Type Documentation

anonymous enum

Enumerator
kStatus_ASRCIdle	ASRC is idle.
kStatus_ASRCInIdle	ASRC in is idle.
kStatus_ASRCOutIdle	ASRC out is idle.
kStatus_ASRCBusy	ASRC is busy.
kStatus_ASRCInvalidArgument	ASRC invalid argument.
kStatus_ASRCClockConfigureFailed	ASRC clock configure failed.
kStatus_ASRCChannelPairConfigureFailed	ASRC clock configure failed.
kStatus_ASRCConvertError	ASRC clock configure failed.
kStatus_ASRCNotSupport	ASRC not support.
kStatus_ASRCQueueFull	ASRC queue is full.
kStatus_ASRCOutQueueIdle	ASRC out queue is idle.
kStatus_ASRCInQueueIdle	ASRC in queue is idle.

enum _asrc_channel_pair

Enumerator
kASRC_ChannelPairA	channel pair A value
kASRC_ChannelPairB	channel pair B value
kASRC_ChannelPairC	channel pair C value

anonymous enum

Enumerator
kASRC_SampleRate_8000HZ	asrc sample rate 8KHZ
kASRC_SampleRate_11025HZ	asrc sample rate 11.025KHZ
kASRC_SampleRate_12000HZ	asrc sample rate 12KHZ
kASRC_SampleRate_16000HZ	asrc sample rate 16KHZ
kASRC_SampleRate_22050HZ	asrc sample rate 22.05KHZ
kASRC_SampleRate_24000HZ	asrc sample rate 24KHZ
kASRC_SampleRate_30000HZ	asrc sample rate 30KHZ
kASRC_SampleRate_32000HZ	asrc sample rate 32KHZ
kASRC_SampleRate_44100HZ	asrc sample rate 44.1KHZ
kASRC_SampleRate_48000HZ	asrc sample rate 48KHZ
kASRC_SampleRate_64000HZ	asrc sample rate 64KHZ
kASRC_SampleRate_88200HZ	asrc sample rate 88.2KHZ
kASRC_SampleRate_96000HZ	asrc sample rate 96KHZ
kASRC_SampleRate_128000HZ	asrc sample rate 128KHZ
kASRC_SampleRate_176400HZ	asrc sample rate 176.4KHZ
kASRC_SampleRate_192000HZ	asrc sample rate 192KHZ

anonymous enum

Enumerator
kASRC_FPInWaitStateInterruptEnable	FP in wait state mask.
kASRC_OverLoadInterruptMask	overload interrupt mask
kASRC_DataOutputCInterruptMask	data output c interrupt mask
kASRC_DataOutputBInterruptMask	data output b interrupt mask
kASRC_DataOutputAInterruptMask	data output a interrupt mask
kASRC_DataInputCInterruptMask	data input c interrupt mask
kASRC_DataInputBInterruptMask	data input b interrupt mask
kASRC_DataInputAInterruptMask	data input a interrupt mask

anonymous enum

Enumerator
kASRC_StatusDSLCounterReady	DSL counter.
kASRC_StatusTaskQueueOverLoad	task queue overload
kASRC_StatusPairCOutputOverLoad	pair c output overload
kASRC_StatusPairBOutputOverLoad	pair b output overload
kASRC_StatusPairAOutputOverLoad	pair a output overload
kASRC_StatusPairCInputOverLoad	pair c input overload
kASRC_StatusPairBInputOverLoad	pair b input overload
kASRC_StatusPairAInputOverLoad	pair a input overload
kASRC_StatusPairCOutputOverflow	pair c output overflow
kASRC_StatusPairBOutputOverflow	pair b output overflow
kASRC_StatusPairAOutputOverflow	pair a output overflow
kASRC_StatusPairCInputUnderflow	pair c input underflow
kASRC_StatusPairBInputUnderflow	pair b input under flow
kASRC_StatusPairAInputUnderflow	pair a input underflow
kASRC_StatusFPInWaitState	FP in wait state.
kASRC_StatusOverloadError	overload error
kASRC_StatusInputError	input error status
kASRC_StatusOutputError	output error status
kASRC_StatusPairCOutputReady	pair c output ready
kASRC_StatusPairBOutputReady	pair b output ready
kASRC_StatusPairAOutputReady	pair a output ready
kASRC_StatusPairCInputReady	pair c input ready
kASRC_StatusPairBInputReady	pair b input ready
kASRC_StatusPairAInputReady	pair a input ready
kASRC_StatusPairAInterrupt	pair A interrupt
kASRC_StatusPairBInterrupt	pair B interrupt
kASRC_StatusPairCInterrupt	pair C interrupt

anonymous enum

Enumerator
kASRC_OutputFifoNearFull	channel pair output fifo near full
kASRC_InputFifoNearEmpty	channel pair input fifo near empty

enum _asrc_ratio

Enumerator
kASRC_RatioNotUsed	ideal ratio not used
kASRC_RatioUseInternalMeasured	ideal ratio use internal measure ratio, can be used for real time streaming audio
kASRC_RatioUseIdealRatio	ideal ratio use manual configure ratio, can be used for the non-real time streaming audio

enum _asrc_audio_channel

Enumerator
kASRC_ChannelsNumber1	channel number is 1
kASRC_ChannelsNumber2	channel number is 2
kASRC_ChannelsNumber3	channel number is 3
kASRC_ChannelsNumber4	channel number is 4
kASRC_ChannelsNumber5	channel number is 5
kASRC_ChannelsNumber6	channel number is 6
kASRC_ChannelsNumber7	channel number is 7
kASRC_ChannelsNumber8	channel number is 8
kASRC_ChannelsNumber9	channel number is 9
kASRC_ChannelsNumber10	channel number is 10

enum _asrc_data_width

Enumerator
kASRC_DataWidth24Bit	data width 24bit
kASRC_DataWidth16Bit	data width 16bit
kASRC_DataWidth8Bit	data width 8bit

enum _asrc_data_align

Enumerator
kASRC_DataAlignMSB	data alignment MSB
kASRC_DataAlignLSB	data alignment LSB

enum _asrc_sign_extension

Enumerator
kASRC_NoSignExtension	no sign extension
kASRC_SignExtension	sign extension

Function Documentation

uint32_t ASRC_GetInstance ( ASRC_Type * base )

Parameters

base	ASRC base pointer.

void ASRC_Init	(	ASRC_Type *	base,
		uint32_t	asrcPeripheralClock_Hz
	)

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

param base asrc base pointer. param asrcPeripheralClock_Hz peripheral clock of ASRC.

void ASRC_Deinit ( ASRC_Type * base )

This API gates the ASRC clock and disable ASRC module. The ASRC module can't operate unless ASRC_Init

Parameters

base	ASRC base pointer.

void ASRC_SoftwareReset ( ASRC_Type * base )

This software reset bit is self-clear bit, it will generate a software reset signal inside ASRC. After 9 cycles of the ASRC processing clock, this reset process will stop and this bit will cleared automatically.

Parameters

base	ASRC base pointer

status_t ASRC_SetChannelPairConfig	(	ASRC_Type *	base,
		asrc_channel_pair_t	channelPair,
		asrc_channel_pair_config_t *	config,
		uint32_t	inputSampleRate,
		uint32_t	outputSampleRate
	)

Parameters

base	ASRC base pointer.
channelPair	index of channel pair, reference _asrc_channel_pair.
config	ASRC channel pair configuration pointer.
inputSampleRate	input audio data sample rate.
outputSampleRate	output audio data sample rate.

uint32_t ASRC_GetOutSamplesSize	(	ASRC_Type *	base,
		asrc_channel_pair_t	channelPair,
		uint32_t	inSampleRate,
		uint32_t	outSampleRate,
		uint32_t	inSamplesize
	)

Note: This API is depends on the ASRC output configuration, should be called after the ASRC_SetChannelPairConfig.

Parameters

base	asrc base pointer.
channelPair	ASRC channel pair number.
inSampleRate	input sample rate.
outSampleRate	output sample rate.
inSamplesize	input sampleS size.

Return values

output buffer size in byte.

uint32_t ASRC_MapSamplesWidth	(	ASRC_Type *	base,
		asrc_channel_pair_t	channelPair,
		uint32_t *	inWidth,
		uint32_t *	outWidth
	)

Note: This API is depends on the ASRC configuration, should be called after the ASRC_SetChannelPairConfig.

Parameters

base	asrc base pointer.
channelPair	asrc channel pair index.
inWidth	ASRC channel pair number.
outWidth	input sample rate.

Return values

input sample mask value.

uint32_t ASRC_GetRemainFifoSamples	(	ASRC_Type *	base,
		asrc_channel_pair_t	channelPair,
		uint32_t *	buffer,
		uint32_t	outSampleWidth,
		uint32_t	remainSamples
	)

Parameters

base	asrc base pointer.
channelPair	ASRC channel pair number.
buffer	input sample numbers.
outSampleWidth	output sample width.
remainSamples	output sample rate.

Return values

remain samples number.

static void ASRC_ModuleEnable	(	ASRC_Type *	base,
		bool	enable
	)

inlinestatic

Parameters

base	ASRC base pointer.
enable	true is enable, false is disable

static void ASRC_ChannelPairEnable	(	ASRC_Type *	base,
		asrc_channel_pair_t	channelPair,
		bool	enable
	)

inlinestatic

Parameters

base	ASRC base pointer.
channelPair	channel pair mask value, reference _asrc_channel_pair_mask.
enable	true is enable, false is disable.

static void ASRC_EnableInterrupt	(	ASRC_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	ASRC peripheral base address.
mask	The interrupts to enable. Logical OR of _asrc_interrupt_mask.

static void ASRC_DisableInterrupt	(	ASRC_Type *	base,
		uint32_t	mask
	)

inlinestatic

Parameters

base	ASRC peripheral base address.
mask	The interrupts to disable. Logical OR of _asrc_interrupt_mask.

static uint32_t ASRC_GetStatus ( ASRC_Type * base )

inlinestatic

Parameters

base	ASRC base pointer

Returns: ASRC Tx status flag value. Use the Status Mask to get the status value needed.

static bool ASRC_GetChannelPairInitialStatus	(	ASRC_Type *	base,
		asrc_channel_pair_t	channel
	)

inlinestatic

Parameters

base	ASRC base pointer
channel	ASRC channel pair.

Returns: ASRC Tx status flag value. Use the Status Mask to get the status value needed.

static uint32_t ASRC_GetChannelPairFifoStatus	(	ASRC_Type *	base,
		asrc_channel_pair_t	channelPair
	)

inlinestatic

Parameters

base	ASRC base pointer
channelPair	ASRC channel pair.

Returns: ASRC channel pair a fifo status flag value. Use the Status Mask to get the status value needed.

static void ASRC_ChannelPairWriteData	(	ASRC_Type *	base,
		asrc_channel_pair_t	channelPair,
		uint32_t	data
	)

inlinestatic

Note: ASRC fifo width is 24bit.

Parameters

base	ASRC base pointer.
channelPair	ASRC channel pair.
data	Data needs to be written.

static uint32_t ASRC_ChannelPairReadData	(	ASRC_Type *	base,
		asrc_channel_pair_t	channelPair
	)

inlinestatic

Note: ASRC fifo width is 24bit.

Parameters

base	ASRC base pointer.
channelPair	ASRC channel pair.

Return values

value read from fifo.

static uint32_t ASRC_GetInputDataRegisterAddress	(	ASRC_Type *	base,
		asrc_channel_pair_t	channelPair
	)

inlinestatic

Note: ASRC fifo width is 24bit.

Parameters

base	ASRC base pointer.
channelPair	ASRC channel pair.

static uint32_t ASRC_GetOutputDataRegisterAddress	(	ASRC_Type *	base,
		asrc_channel_pair_t	channelPair
	)

inlinestatic

Note: ASRC fifo width is 24bit.

Parameters

base	ASRC base pointer.
channelPair	ASRC channel pair.

status_t ASRC_SetIdealRatioConfig	(	ASRC_Type *	base,
		asrc_channel_pair_t	channelPair,
		uint32_t	inputSampleRate,
		uint32_t	outputSampleRate
	)

The ideal ratio should be used when input clock source is not avalible.

Parameters

base	ASRC base pointer.
channelPair	ASRC channel pair.
inputSampleRate	input audio data sample rate.
outputSampleRate	output audio data sample rate.

status_t ASRC_TransferSetChannelPairConfig	(	ASRC_Type *	base,
		asrc_handle_t *	handle,
		asrc_channel_pair_config_t *	config,
		uint32_t	inputSampleRate,
		uint32_t	outputSampleRate
	)

Parameters

base	ASRC base pointer.
handle	ASRC transactional handle pointer.
config	ASRC channel pair configuration pointer.
inputSampleRate	input audio data sample rate.
outputSampleRate	output audio data sample rate.

void ASRC_TransferCreateHandle	(	ASRC_Type *	base,
		asrc_handle_t *	handle,
		asrc_channel_pair_t	channelPair,
		asrc_transfer_callback_t	inCallback,
		asrc_transfer_callback_t	outCallback,
		void *	userData
	)

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

Parameters

base	ASRC base pointer
handle	ASRC handle pointer.
channelPair	ASRC channel pair.
inCallback	Pointer to the user callback function.
outCallback	Pointer to the user callback function.
userData	User parameter passed to the callback function

status_t ASRC_TransferNonBlocking	(	ASRC_Type *	base,
		asrc_handle_t *	handle,
		asrc_transfer_t *	xfer
	)

Note: This API returns immediately after the transfer initiates, application should check the wait and check the callback status.

Parameters

base	asrc base pointer.
handle	Pointer to the asrc_handle_t structure which stores the transfer state.
xfer	Pointer to the ASRC_transfer_t structure.

Return values

kStatus_Success	Successfully started the data receive.
kStatus_ASRCBusy	Previous receive still not finished.

status_t ASRC_TransferBlocking	(	ASRC_Type *	base,
		asrc_channel_pair_t	channelPair,
		asrc_transfer_t *	xfer
	)

Note: This API returns immediately after the convert finished.

Parameters

base	asrc base pointer.
channelPair	channel pair index.
xfer	Pointer to the ASRC_transfer_t structure.

Return values

kStatus_Success Successfully started the data receive.

status_t ASRC_TransferGetConvertedCount	(	ASRC_Type *	base,
		asrc_handle_t *	handle,
		size_t *	count
	)

Parameters

base	ASRC base pointer.
handle	Pointer to the asrc_handle_t structure which stores the transfer state.
count	Bytes count sent.

Return values

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

void ASRC_TransferAbortConvert	(	ASRC_Type *	base,
		asrc_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	ASRC base pointer.
handle	Pointer to the asrc_handle_t structure which stores the transfer state.

void ASRC_TransferTerminateConvert	(	ASRC_Type *	base,
		asrc_handle_t *	handle
	)

This function will clear all transfer slots buffered in the asrc queue. If users only want to abort the current transfer slot, please call ASRC_TransferAbortConvert.

Parameters

base	ASRC base pointer.
handle	ASRC eDMA handle pointer.

void ASRC_TransferHandleIRQ	(	ASRC_Type *	base,
		asrc_handle_t *	handle
	)

Parameters

base	ASRC base pointer.
handle	Pointer to the asrc_handle_t structure.

Overview

Data Structures

Macros

Typedefs

Enumerations

Driver version

Initialization and deinitialization

Interrupts

Status

Bus Operations

Transactional

Data Structure Documentation

Data Fields

Data Fields

Field Documentation

Data Fields

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Data Fields

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation