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rt-thread-official/bsp/imxrt/libraries/MIMXRT1170/MIMXRT1176/drivers/fsl_asrc.c

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add rt1170/rt1020 bsp (#5927) * add rt1170 bsp * add rt1020 bsp
2022-05-19 14:06:35 +08:00
/*
* Copyright 2019-2021 NXP
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "fsl_asrc.h"
/* Component ID definition, used by tools. */
#ifndef FSL_COMPONENT_ID
#define FSL_COMPONENT_ID "platform.drivers.asrc"
#endif
/*******************************************************************************
* Definitations
******************************************************************************/
/*! @brief Typedef for asrc tx interrupt handler. */
typedef void (*asrc_isr_t)(ASRC_Type *base, asrc_handle_t *asrcHandle);
/*! @brief ASRC support maximum channel number */
#define ASRC_SUPPORT_MAXIMUM_CHANNEL_NUMER (10U)
#define ASRC_SAMPLE_RATIO_DECIMAL_DEPTH (26U)
/*******************************************************************************
* Prototypes
******************************************************************************/
/*!
* @brief ASRC read non blocking.
*
* @param base ASRC base pointer.
* @param channelPair ASRC channel pair.
* @param destAddress dest buffer address.
* @param samples number of samples to read.
* @param sampleWidth the width that one sample takes.
*/
static void ASRC_ReadNonBlocking(
ASRC_Type *base, asrc_channel_pair_t channelPair, uint32_t *destAddress, uint32_t samples, uint32_t sampleWidth);
/*!
* @brief ASRC write non blocking.
*
* @param base ASRC base pointer.
* @param channelPair ASRC channel pair.
* @param srcAddress source buffer address.
* @param samples number of samples to read.
* @param sampleMask the mask of sample data.
* @param sampleWidth the width that one sample takes.
*/
static void ASRC_WriteNonBlocking(ASRC_Type *base,
asrc_channel_pair_t channelPair,
const uint32_t *srcAddress,
uint32_t samples,
uint32_t sampleMask,
uint32_t sampleWidth);
/*!
* @brief ASRC calculate divider and prescaler.
*
* @param sampleRate_Hz sample rate.
* @param sourceClock_Hz source clock.
*/
static uint32_t ASRC_CalculateClockDivider(uint32_t sampleRate_Hz, uint32_t sourceClock_Hz);
/*!
* @brief ASRC pre/post processing selection.
*
* @param inSampleRate in audio data sample rate.
* @param outSampleRate out audio data sample rate.
* @param preProc pre processing selection.
* @param postProc post precessing selection.
*/
static status_t ASRC_ProcessSelection(uint32_t inSampleRate,
uint32_t outSampleRate,
uint32_t *preProc,
uint32_t *postProc);
/*******************************************************************************
* Variables
******************************************************************************/
/* Base pointer array */
static ASRC_Type *const s_asrcBases[] = ASRC_BASE_PTRS;
/*!@brief asrc handle pointer */
static asrc_handle_t *s_asrcHandle[ARRAY_SIZE(s_asrcBases)][FSL_ASRC_CHANNEL_PAIR_COUNT];
/* IRQ number array */
static const IRQn_Type s_asrcIRQ[] = ASRC_IRQS;
#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
/* Clock name array */
static const clock_ip_name_t s_asrcClock[] = ASRC_CLOCKS;
#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
/*! @brief Pointer to IRQ handler for each instance. */
static asrc_isr_t s_asrcIsr;
/*******************************************************************************
* Code
******************************************************************************/
uint32_t ASRC_GetInstance(ASRC_Type *base)
{
uint32_t instance;
/* Find the instance index from base address mappings. */
for (instance = 0; instance < ARRAY_SIZE(s_asrcBases); instance++)
{
if (s_asrcBases[instance] == base)
{
break;
}
}
assert(instance < ARRAY_SIZE(s_asrcBases));
return instance;
}
static void ASRC_ReadNonBlocking(
ASRC_Type *base, asrc_channel_pair_t channelPair, uint32_t *destAddress, uint32_t samples, uint32_t sampleWidth)
{
uint32_t i = 0U;
uint32_t *destAddr = destAddress;
volatile uint32_t *srcAddr = ASRC_ASRDO_ADDR(base, channelPair);
for (i = 0U; i < samples; i++)
{
*destAddr = *srcAddr;
destAddr = (uint32_t *)((uint32_t)destAddr + sampleWidth);
}
}
static void ASRC_WriteNonBlocking(ASRC_Type *base,
asrc_channel_pair_t channelPair,
const uint32_t *srcAddress,
uint32_t samples,
uint32_t sampleMask,
uint32_t sampleWidth)
{
uint32_t i = 0U;
const uint32_t *srcAddr = srcAddress;
volatile uint32_t *destAddr = ASRC_ASRDI_ADDR(base, channelPair);
for (i = 0U; i < samples; i++)
{
*destAddr = *srcAddr & sampleMask;
srcAddr = (uint32_t *)((uint32_t)srcAddr + sampleWidth);
}
}
static uint32_t ASRC_CalculateClockDivider(uint32_t sampleRate_Hz, uint32_t sourceClock_Hz)
{
assert(sourceClock_Hz >= sampleRate_Hz);
uint32_t divider = sourceClock_Hz / sampleRate_Hz;
uint32_t prescaler = 0U;
/* sourceClock_Hz = sampleRate_Hz * divider * (2 ^ prescaler) */
while (divider > 8U)
{
divider >>= 1U;
prescaler++;
}
/* Hardware limitation:
* If the prescaler is set to 1, the clock divider can only be set to 1 and the clock source must have a 50% duty
* cycle
*/
if ((prescaler == 1U) && (divider != 1U))
{
divider >>= 1U;
prescaler++;
}
/* fine tuning */
if (sourceClock_Hz / ((1UL << prescaler) * divider) > sampleRate_Hz)
{
divider++;
}
return ((divider - 1U) << 3U) | (prescaler & 0x7U);
}
static status_t ASRC_ProcessSelection(uint32_t inSampleRate,
uint32_t outSampleRate,
uint32_t *preProc,
uint32_t *postProc)
{
bool op2Cond = false;
bool op0Cond = false;
op2Cond = (((inSampleRate * 15U > outSampleRate * 16U) && (outSampleRate < 56000U)) ||
((inSampleRate > 56000U) && (outSampleRate < 56000U)));
op0Cond = (inSampleRate * 23U < outSampleRate * 8U);
/* preProc == 4 or preProc == 5 is not support now */
if ((inSampleRate * 8U > 129U * outSampleRate) || ((inSampleRate * 8U > 65U * outSampleRate)))
{
return kStatus_ASRCNotSupport;
}
if (inSampleRate * 8U > 33U * outSampleRate)
{
*preProc = 2U;
}
else if (inSampleRate * 8U > 15U * outSampleRate)
{
if (inSampleRate > 152000U)
{
*preProc = 2U;
}
else
{
*preProc = 1U;
}
}
else if (inSampleRate < 76000U)
{
*preProc = 0;
}
else if (inSampleRate > 152000U)
{
*preProc = 2;
}
else
{
*preProc = 1;
}
if (op2Cond)
{
*postProc = 2;
}
else if (op0Cond)
{
*postProc = 0;
}
else
{
*postProc = 1;
}
return kStatus_Success;
}
/*!
* brief Map register sample width to real sample width.
*
* note This API is depends on the ASRC configuration, should be called after the ASRC_SetChannelPairConfig.
* param base asrc base pointer.
* param channelPair asrc channel pair index.
* param inWidth ASRC channel pair number.
* param outWidth input sample rate.
* retval input sample mask value.
*/
uint32_t ASRC_MapSamplesWidth(ASRC_Type *base, asrc_channel_pair_t channelPair, uint32_t *inWidth, uint32_t *outWidth)
{
uint32_t sampleMask = 0U,
inRegWidth = (ASRC_ASRMCR1(base, channelPair) & ASRC_ASRMCR1_IWD_MASK) >> ASRC_ASRMCR1_IWD_SHIFT,
outRegWidth = ASRC_ASRMCR1(base, channelPair) & ASRC_ASRMCR1_OW16_MASK,
inDataAlign = (ASRC_ASRMCR1(base, channelPair) & ASRC_ASRMCR1_IMSB_MASK) >> ASRC_ASRMCR1_IMSB_SHIFT,
outDataAlign = (ASRC_ASRMCR1(base, channelPair) & ASRC_ASRMCR1_OMSB_MASK) >> ASRC_ASRMCR1_OMSB_SHIFT;
/* get in sample width */
if (inRegWidth == (uint32_t)kASRC_DataWidth8Bit)
{
*inWidth = 1U;
sampleMask = 0xFFU;
if (inDataAlign == (uint32_t)kASRC_DataAlignMSB)
{
*inWidth = 2U;
sampleMask = 0xFF00U;
}
}
else if (inRegWidth == (uint32_t)kASRC_DataWidth16Bit)
{
*inWidth = 2U;
sampleMask = 0xFFFFU;
if (inDataAlign == (uint32_t)kASRC_DataAlignMSB)
{
*inWidth = 4U;
sampleMask = 0xFFFF0000U;
}
}
else
{
*inWidth = 3U;
sampleMask = 0xFFFFFFU;
if (inDataAlign == (uint32_t)kASRC_DataAlignMSB)
{
sampleMask = 0xFFFFFF00U;
*inWidth = 4U;
}
}
/* get out sample width */
if (outRegWidth == (uint32_t)kASRC_DataWidth16Bit)
{
*outWidth = 2U;
if (outDataAlign == (uint32_t)kASRC_DataAlignMSB)
{
*outWidth = 4U;
}
}
else
{
*outWidth = 4U;
}
return sampleMask;
}
/*!
* brief ASRC configure ideal ratio.
* The ideal ratio should be used when input clock source is not avalible.
*
* param base ASRC base pointer.
* param channelPair ASRC channel pair.
* param inputSampleRate input audio data sample rate.
* param outputSampleRate output audio data sample rate.
*/
status_t ASRC_SetIdealRatioConfig(ASRC_Type *base,
asrc_channel_pair_t channelPair,
uint32_t inputSampleRate,
uint32_t outputSampleRate)
{
uint32_t ratio = 0U, i = 0U;
uint32_t preProc = 0U, postProc = 0U;
uint32_t asrcfg = base->ASRCFG;
/* caculate integer part */
ratio = (inputSampleRate / outputSampleRate) << ASRC_SAMPLE_RATIO_DECIMAL_DEPTH;
inputSampleRate %= outputSampleRate;
/* get decimal part */
for (i = 1U; i <= ASRC_SAMPLE_RATIO_DECIMAL_DEPTH; i++)
{
inputSampleRate <<= 1;
if (inputSampleRate < outputSampleRate)
{
continue;
}
ratio |= 1UL << (ASRC_SAMPLE_RATIO_DECIMAL_DEPTH - i);
inputSampleRate -= outputSampleRate;
if (0U == inputSampleRate)
{
break;
}
}
/* select pre/post precessing option */
if (ASRC_ProcessSelection(inputSampleRate, outputSampleRate, &preProc, &postProc) != kStatus_Success)
{
return kStatus_ASRCNotSupport;
}
ASRC_IDEAL_RATIO_HIGH(base, channelPair) = ASRC_ASRIDRHA_IDRATIOA_H(ratio >> 24U);
ASRC_IDEAL_RATIO_LOW(base, channelPair) = ASRC_ASRIDRLA_IDRATIOA_L(ratio);
base->ASRCTR &= ~ASRC_ASRCTR_AT_MASK(channelPair);
asrcfg &= ~(ASRC_ASRCFG_PRE_MODE_MASK(channelPair) | ASRC_ASRCFG_POST_MODE_MASK(channelPair));
asrcfg |= ASRC_ASRCFG_PRE_MODE(preProc, channelPair) | ASRC_ASRCFG_POST_MODE(postProc, channelPair);
base->ASRCFG = asrcfg;
return kStatus_Success;
}
/*!
* brief Initializes the asrc peripheral.
*
* 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_Init(ASRC_Type *base, uint32_t asrcPeripheralClock_Hz)
{
#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
/* Enable the asrc clock */
CLOCK_EnableClock(s_asrcClock[ASRC_GetInstance(base)]);
#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
/* disable ASRC channel pair, enable ASRC */
base->ASRCTR = 1U;
/* disable all the interrupt */
base->ASRIER = 0U;
#if (defined FSL_FEATURE_ASRC_PARAMETER_REGISTER_NAME_ASRPM) && FSL_FEATURE_ASRC_PARAMETER_REGISTER_NAME_ASRPM
/* set paramter register to default configurations per recommand value in reference manual */
base->ASRPM[0] = 0x7fffffU;
base->ASRPM[1] = 0x255555U;
base->ASRPM[2] = 0xff7280U;
base->ASRPM[3] = 0xff7280U;
base->ASRPM[4] = 0xff7280U;
#else
/* set paramter register to default configurations per recommand value in reference manual */
base->ASRPMn[0] = 0x7fffffU;
base->ASRPMn[1] = 0x255555U;
base->ASRPMn[2] = 0xff7280U;
base->ASRPMn[3] = 0xff7280U;
base->ASRPMn[4] = 0xff7280U;
#endif /*FSL_FEATURE_ASRC_PARAMETER_REGISTER_NAME_ASRPM*/
/* set task queue fifo */
base->ASRTFR1 = ASRC_ASRTFR1_TF_BASE(0x7C);
/* 76K/56K divider */
base->ASR76K = ASRC_ASR76K_ASR76K(asrcPeripheralClock_Hz / 76000U);
base->ASR56K = ASRC_ASR56K_ASR56K(asrcPeripheralClock_Hz / 56000U);
}
/*!
* brief De-initializes the ASRC peripheral.
*
* This API gates the ASRC clock and disable ASRC module. The ASRC module can't operate unless ASRC_Init
*
* param base ASRC base pointer.
*/
void ASRC_Deinit(ASRC_Type *base)
{
/* disable ASRC module */
ASRC_ModuleEnable(base, false);
#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
CLOCK_DisableClock(s_asrcClock[ASRC_GetInstance(base)]);
#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
}
/*!
* brief Do software reset .
*
* 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.
*
* param base ASRC base pointer
*/
void ASRC_SoftwareReset(ASRC_Type *base)
{
base->ASRCTR |= ASRC_ASRCTR_SRST_MASK;
/* polling reset clear automatically */
while ((base->ASRCTR & ASRC_ASRCTR_SRST_MASK) != 0U)
{
}
}
/*!
* brief ASRC configure channel pair.
*
* param base ASRC base pointer.
* param channelPair index of channel pair, reference _asrc_channel_pair.
* param config ASRC channel pair configuration pointer.
* param inputSampleRate in audio data sample rate.
* param outSampleRate out audio data sample rate.
*/
status_t ASRC_SetChannelPairConfig(ASRC_Type *base,
asrc_channel_pair_t channelPair,
asrc_channel_pair_config_t *config,
uint32_t inputSampleRate,
uint32_t outputSampleRate)
{
assert(config != NULL);
if (config->outDataWidth == kASRC_DataWidth8Bit)
{
return kStatus_InvalidArgument;
}
if (((inputSampleRate < (uint32_t)kASRC_SampleRate_8000HZ) ||
(inputSampleRate > (uint32_t)kASRC_SampleRate_192000HZ)) ||
((outputSampleRate < (uint32_t)kASRC_SampleRate_8000HZ) ||
(outputSampleRate > (uint32_t)kASRC_SampleRate_192000HZ)) ||
(((outputSampleRate > (uint32_t)kASRC_SampleRate_8000HZ) &&
(outputSampleRate < (uint32_t)kASRC_SampleRate_30000HZ)) &&
(inputSampleRate / outputSampleRate > 8U || outputSampleRate / inputSampleRate > 24U)))
{
return kStatus_InvalidArgument;
}
uint32_t i = 0U;
/* channel pair processing selection and ratio configuration */
uint32_t asrctr = base->ASRCTR & (~(ASRC_ASRCTR_AT_MASK(channelPair) | ASRC_ASRCTR_RATIO_MASK(channelPair)));
/* use automatic selection for processing option by default */
asrctr |= ASRC_ASRCTR_AT_MASK(channelPair);
/* ratio configuration */
asrctr |= ASRC_ASRCTR_RATIO(config->sampleRateRatio, channelPair);
base->ASRCTR = asrctr;
/* audio data channel counter configurations */
uint32_t asrcncr = base->ASRCNCR & (~ASRC_ASRCNCR_CHANNEL_COUNTER_MASK(channelPair));
base->ASRCNCR = asrcncr | ASRC_ASRCNCR_CHANNEL_COUNTER(config->audioDataChannels, channelPair);
/* in clock source and out clock source configurations */
uint32_t asrcsr =
base->ASRCSR &
(~(ASRC_ASRCSR_INPUT_CLOCK_SOURCE_MASK(channelPair) | ASRC_ASRCSR_OUTPUT_CLOCK_SOURCE_MASK(channelPair)));
asrcsr |= ASRC_ASRCSR_OUTPUT_CLOCK_SOURCE(config->outClockSource, channelPair);
if (config->inClockSource != kASRC_ClockSourceNotAvalible)
{
asrcsr |= ASRC_ASRCSR_INPUT_CLOCK_SOURCE(config->inClockSource, channelPair);
}
base->ASRCSR = asrcsr;
/* clock divider configuration */
uint32_t asrcdr =
base->ASRCDR1 &
(~(ASRC_ASRCDR_INPUT_PRESCALER_MASK(channelPair) | ASRC_ASRCDR_INPUT_DIVIDER_MASK(channelPair) |
ASRC_ASRCDR_OUTPUT_PRESCALER_MASK(channelPair) | ASRC_ASRCDR_OUTPUT_DIVIDER_MASK(channelPair)));
asrcdr |= ASCR_ASRCDR_OUTPUT_CLOCK_DIVIDER_PRESCALER(
ASRC_CalculateClockDivider(outputSampleRate, config->outSourceClock_Hz), channelPair);
if (config->inClockSource != kASRC_ClockSourceNotAvalible)
{
asrcdr |= ASCR_ASRCDR_INPUT_CLOCK_DIVIDER_PRESCALER(
ASRC_CalculateClockDivider(inputSampleRate, config->inSourceClock_Hz), channelPair);
}
if (channelPair == kASRC_ChannelPairC)
{
base->ASRCDR2 = asrcdr;
}
else
{
base->ASRCDR1 = asrcdr;
}
/* data width/sign extension/data align configuration */
ASRC_ASRMCR1(base, channelPair) = ASRC_ASRMCR1_OW16(config->outDataWidth) | ASRC_ASRMCR1_IWD(config->inDataWidth) |
ASRC_ASRMCR1_OSGN(config->outSignExtension) |
ASRC_ASRMCR1_OMSB(config->outDataAlign) | ASRC_ASRMCR1_IMSB(config->inDataAlign);
/* data configurations, MISC */
uint32_t asrmcra = ASRC_ASRMCR(base, channelPair) &
(~(ASRC_ASRMCRA_BUFSTALLA_MASK | ASRC_ASRMCRA_EXTTHRSHA_MASK |
ASRC_ASRMCRA_INFIFO_THRESHOLDA_MASK | ASRC_ASRMCRA_OUTFIFO_THRESHOLDA_MASK));
/* buffer stall */
asrmcra |= ASRC_ASRMCRA_BUFSTALLA(config->bufStallWhenFifoEmptyFull);
/* in fifo and out fifo threshold */
asrmcra |= ASRC_ASRMCRA_EXTTHRSHA_MASK | ASRC_ASRMCRA_INFIFO_THRESHOLDA(config->inFifoThreshold - 1UL) |
ASRC_ASRMCRA_OUTFIFO_THRESHOLDA(config->outFifoThreshold - 1UL);
ASRC_ASRMCR(base, channelPair) = asrmcra;
if (config->sampleRateRatio == kASRC_RatioUseIdealRatio)
{
if (ASRC_SetIdealRatioConfig(base, channelPair, inputSampleRate, outputSampleRate) != kStatus_Success)
{
return kStatus_ASRCChannelPairConfigureFailed;
}
}
/* channel pair enable */
ASRC_ChannelPairEnable(base, channelPair, true);
/* wait channel initial served */
while (!ASRC_GetChannelPairInitialStatus(base, channelPair))
{
}
for (i = 0U; i < (uint32_t)config->audioDataChannels * 4U; i++)
{
ASRC_ChannelPairWriteData(base, channelPair, 0U);
}
return kStatus_Success;
}
/*!
* brief Get output sample buffer size.
*
* note This API is depends on the ASRC output configuration, should be called after the ASRC_SetChannelPairConfig.
*
* param base asrc base pointer.
* param channelPair ASRC channel pair number.
* param inSampleRate input sample rate.
* param outSampleRate output sample rate.
* param inSamples input sampleS size.
* retval output buffer size in byte.
*/
uint32_t ASRC_GetOutSamplesSize(ASRC_Type *base,
asrc_channel_pair_t channelPair,
uint32_t inSampleRate,
uint32_t outSampleRate,
uint32_t inSamplesize)
{
uint32_t inSamples = 0U;
uint32_t outSamples = 0U;
uint32_t outSamplesBufSize = 0U, audioChannels = ASRC_GET_CHANNEL_COUNTER(base, channelPair);
;
asrc_data_width_t outWdith = (base->ASRMCR1[channelPair] & ASRC_ASRMCR1_OW16_MASK) == ASRC_ASRMCR1_OW16_MASK ?
kASRC_DataWidth16Bit :
kASRC_DataWidth24Bit;
asrc_data_align_t outAlign = (base->ASRMCR1[channelPair] & ASRC_ASRMCR1_OMSB_MASK) == ASRC_ASRMCR1_OMSB_MASK ?
kASRC_DataAlignMSB :
kASRC_DataAlignLSB;
uint32_t inWdith = (base->ASRMCR1[channelPair] & ASRC_ASRMCR1_IWD_MASK) >> ASRC_ASRMCR1_IWD_SHIFT;
asrc_data_align_t inAlign = (base->ASRMCR1[channelPair] & ASRC_ASRMCR1_IMSB_MASK) == ASRC_ASRMCR1_IMSB_MASK ?
kASRC_DataAlignMSB :
kASRC_DataAlignLSB;
bool signExtend = (base->ASRMCR1[channelPair] & ASRC_ASRMCR1_OSGN_MASK) == ASRC_ASRMCR1_OSGN_MASK ? true : false;
/* 24bit input data */
if (inWdith == 0U)
{
inSamples = inSamplesize / (inAlign == kASRC_DataAlignMSB ? 4U : 3U);
}
/* 16bit input data */
else if (inWdith == 1U)
{
inSamples = inSamplesize / (inAlign == kASRC_DataAlignMSB ? 4U : 2U);
}
/* 8bit input data */
else
{
inSamples = inSamplesize / (inAlign == kASRC_DataAlignMSB ? 2U : 1U);
}
outSamples = (uint32_t)((uint64_t)inSamples * outSampleRate / inSampleRate);
/* make sure output samples is in group */
outSamples = outSamples - outSamples % audioChannels;
if (outWdith == kASRC_DataWidth16Bit)
{
if ((outAlign == kASRC_DataAlignMSB) || signExtend)
{
outSamplesBufSize = outSamples * 4U;
}
else
{
outSamplesBufSize = outSamples * 2U;
}
}
if (outWdith == kASRC_DataWidth24Bit)
{
outSamplesBufSize = outSamples * 4U;
}
return outSamplesBufSize;
}
/*!
* brief Performs an blocking convert on asrc.
*
* note This API returns immediately after the convert finished.
*
* param base asrc base pointer.
* param channelPair channel pair index.
* param xfer Pointer to the ASRC_transfer_t structure.
* retval kStatus_Success Successfully started the data receive.
*/
status_t ASRC_TransferBlocking(ASRC_Type *base, asrc_channel_pair_t channelPair, asrc_transfer_t *xfer)
{
assert(xfer != NULL);
uint32_t inWaterMark = ASRC_ASRMCR(base, channelPair) & ASRC_ASRMCRA_INFIFO_THRESHOLDA_MASK,
outWaterMark = (ASRC_ASRMCR(base, channelPair) & ASRC_ASRMCRA_OUTFIFO_THRESHOLDA_MASK) >>
ASRC_ASRMCRA_OUTFIFO_THRESHOLDA_SHIFT,
audioChannels = ASRC_GET_CHANNEL_COUNTER(base, channelPair);
uint8_t *inAddr = (uint8_t *)xfer->inData, *outAddr = (uint8_t *)xfer->outData;
uint32_t onceWriteSamples = 0U;
uint32_t status = 0U, inSampleMask = 0U, inSamples = 0U, outSamples = 0U, inWidth = 0U, outWidth = 0U;
inSampleMask = ASRC_MapSamplesWidth(base, channelPair, &inWidth, &outWidth);
inSamples = xfer->inDataSize / inWidth;
outSamples = xfer->outDataSize / outWidth;
inWaterMark *= audioChannels;
outWaterMark *= audioChannels;
while (outSamples != 0U)
{
status = ASRC_GetStatus(base);
if ((status & ((uint32_t)kASRC_StatusPairCInputReady | (uint32_t)kASRC_StatusPairBInputReady |
(uint32_t)kASRC_StatusPairAInputReady)) != 0U)
{
onceWriteSamples =
MIN(inSamples, (size_t)((FSL_ASRC_CHANNEL_PAIR_FIFO_DEPTH * audioChannels - inWaterMark)));
ASRC_WriteNonBlocking(base, channelPair, (uint32_t *)(uint32_t)inAddr, onceWriteSamples, inSampleMask,
inWidth);
inAddr = (uint8_t *)((uint32_t)inAddr + onceWriteSamples * inWidth);
inSamples -= onceWriteSamples;
}
if (outSamples > outWaterMark)
{
if ((status & ((uint32_t)kASRC_StatusPairCOutputReady | (uint32_t)kASRC_StatusPairAOutputReady |
(uint32_t)kASRC_StatusPairBOutputReady)) != 0U)
{
ASRC_ReadNonBlocking(base, channelPair, (uint32_t *)(uint32_t)outAddr, outWaterMark, outWidth);
outAddr = (uint8_t *)((uint32_t)outAddr + outWaterMark * outWidth);
outSamples -= outWaterMark;
}
}
else
{
outSamples -=
ASRC_GetRemainFifoSamples(base, channelPair, (uint32_t *)(uint32_t)outAddr, outWidth, outSamples);
continue;
}
}
return kStatus_Success;
}
/*!
* brief ASRC configure channel pair.
*
* param base ASRC base pointer.
* param handle ASRC transactional handle pointer.
* param config ASRC channel pair configuration pointer.
* param inputSampleRate in audio data sample rate.
* param outputSampleRate out 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)
{
assert(handle != NULL);
handle->in.fifoThreshold = config->inFifoThreshold * (uint32_t)config->audioDataChannels;
handle->out.fifoThreshold = config->outFifoThreshold * (uint32_t)config->audioDataChannels;
handle->audioDataChannels = config->audioDataChannels;
if (ASRC_SetChannelPairConfig(base, handle->channelPair, config, inputSampleRate, outputSampleRate) !=
kStatus_Success)
{
return kStatus_ASRCChannelPairConfigureFailed;
}
handle->in.sampleMask =
ASRC_MapSamplesWidth(base, handle->channelPair, &handle->in.sampleWidth, &handle->out.sampleWidth);
return kStatus_Success;
}
/*!
* brief Get left samples in fifo.
*
* param base asrc base pointer.
* param channelPair ASRC channel pair number.
* param buffer input sample numbers.
* param outSampleWidth output sample width.
* param remainSamples output sample rate.
* retval remain samples number.
*/
uint32_t ASRC_GetRemainFifoSamples(
ASRC_Type *base, asrc_channel_pair_t channelPair, uint32_t *buffer, uint32_t outSampleWidth, uint32_t remainSamples)
{
uint32_t remainSamplesInFifo = 0U;
uint32_t audioChannels = ASRC_GET_CHANNEL_COUNTER(base, channelPair);
remainSamplesInFifo =
((ASRC_ASRFST_ADDR(base, channelPair) & ASRC_ASRFSTA_OUTFIFO_FILLA_MASK) >> ASRC_ASRFSTA_OUTFIFO_FILLA_SHIFT) *
audioChannels;
if (remainSamples < remainSamplesInFifo)
{
remainSamplesInFifo = remainSamples;
}
ASRC_ReadNonBlocking(base, channelPair, (uint32_t *)buffer, remainSamplesInFifo, outSampleWidth);
return remainSamplesInFifo;
}
/*!
* brief Initializes the ASRC handle.
*
* This function initializes the handle for the ASRC transactional APIs. Call
* this function once to get the handle initialized.
*
* param base ASRC base pointer
* param handle ASRC handle pointer.
* param inCallback Pointer to the user callback function.
* param outCallback Pointer to the user callback function.
* param userData User parameter passed to the callback function
*/
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)
{
assert(handle != NULL);
uint32_t instance = ASRC_GetInstance(base);
(void)memset(handle, 0, sizeof(*handle));
s_asrcHandle[instance][channelPair] = handle;
handle->in.callback = inCallback;
handle->out.callback = outCallback;
handle->userData = userData;
handle->channelPair = channelPair;
/* Set the isr pointer */
s_asrcIsr = ASRC_TransferHandleIRQ;
(void)EnableIRQ(s_asrcIRQ[instance]);
}
/*!
* brief Performs an interrupt non-blocking convert on asrc.
*
* note This API returns immediately after the transfer initiates, application should check the wait and check the
* callback status.
*
* param base asrc base pointer.
* param handle Pointer to the asrc_handle_t structure which stores the transfer state.
* param xfer Pointer to the ASRC_transfer_t structure.
* retval kStatus_Success Successfully started the data receive.
* retval kStatus_ASRCBusy Previous receive still not finished.
*/
status_t ASRC_TransferNonBlocking(ASRC_Type *base, asrc_handle_t *handle, asrc_transfer_t *xfer)
{
assert(handle != NULL);
assert(xfer != NULL);
/* Check if the queue is full */
if ((handle->in.asrcQueue[handle->in.queueUser] != NULL) || (handle->out.asrcQueue[handle->out.queueUser] != NULL))
{
return kStatus_ASRCBusy;
}
/* Add into queue */
handle->in.transferSamples[handle->in.queueUser] = xfer->inDataSize / handle->in.sampleWidth;
handle->in.asrcQueue[handle->in.queueUser] = xfer->inData;
handle->in.queueUser = (handle->in.queueUser + 1U) % ASRC_XFER_QUEUE_SIZE;
handle->out.asrcQueue[handle->out.queueUser] = xfer->outData;
handle->out.transferSamples[handle->out.queueUser] = xfer->outDataSize / handle->out.sampleWidth;
handle->out.queueUser = (handle->out.queueUser + 1U) % ASRC_XFER_QUEUE_SIZE;
if (handle->state != (uint32_t)kStatus_ASRCBusy)
{
/* enable channel pair interrupt */
ASRC_EnableInterrupt(base, ASRC_ASRIER_INPUT_INTERRUPT_MASK(handle->channelPair) |
(uint32_t)kASRC_OverLoadInterruptMask |
ASRC_ASRIER_OUTPUTPUT_INTERRUPT_MASK(handle->channelPair));
}
/* Set the state to busy */
handle->state = kStatus_ASRCBusy;
return kStatus_Success;
}
/*!
* brief Gets a set byte count.
*
* param base asrc base pointer.
* param handle Pointer to the ASRC_handle_t structure which stores the transfer state.
* param count Bytes count sent.
* retval kStatus_Success Succeed get the transfer count.
* retval kStatus_NoTransferInProgress There is not a non-blocking transaction currently in progress.
*/
status_t ASRC_TransferGetConvertedCount(ASRC_Type *base, asrc_handle_t *handle, size_t *count)
{
assert(handle != NULL);
status_t status = kStatus_Success;
if (handle->state != (uint32_t)kStatus_ASRCBusy)
{
status = kStatus_ASRCIdle;
}
else
{
*count = handle->out.transferSamples[handle->out.queueDriver];
}
return status;
}
/*!
* brief Aborts the current convert.
*
* note This API can be called any time when an interrupt non-blocking transfer initiates
* to abort the transfer early.
*
* param base asrc base pointer.
* param handle Pointer to the ASRC_handle_t structure which stores the transfer state.
*/
void ASRC_TransferAbortConvert(ASRC_Type *base, asrc_handle_t *handle)
{
assert(handle != NULL);
/* enable ASRC module */
ASRC_ModuleEnable(base, false);
handle->state = kStatus_ASRCIdle;
handle->in.queueDriver = 0;
handle->in.queueUser = 0;
handle->out.queueDriver = 0;
handle->out.queueUser = 0;
}
/*!
* brief Terminate all asrc convert.
*
* 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_TransferAbortSend.
*
* param base asrc base pointer.
* param handle asrc eDMA handle pointer.
*/
void ASRC_TransferTerminateConvert(ASRC_Type *base, asrc_handle_t *handle)
{
assert(handle != NULL);
/* Abort the current transfer */
ASRC_TransferAbortConvert(base, handle);
/* Clear all the internal information */
(void)memset(handle->in.asrcQueue, 0, sizeof(handle->in.asrcQueue));
(void)memset(handle->in.transferSamples, 0, sizeof(handle->in.transferSamples));
(void)memset(handle->out.asrcQueue, 0, sizeof(handle->out.asrcQueue));
(void)memset(handle->out.transferSamples, 0, sizeof(handle->out.transferSamples));
}
/*!
* brief ASRC convert interrupt handler.
*
* param base asrc base pointer.
* param handle Pointer to the asrc_handle_t structure.
*/
void ASRC_TransferHandleIRQ(ASRC_Type *base, asrc_handle_t *handle)
{
assert(handle != NULL);
uint32_t status = base->ASRSTR;
/* Handle Error */
if ((status & (uint32_t)kASRC_StatusInputError) != 0U)
{
/* Call the callback */
if (handle->in.callback != NULL)
{
(handle->in.callback)(base, handle, kStatus_ASRCConvertError, handle->userData);
}
}
if ((status & (uint32_t)kASRC_StatusOutputError) != 0U)
{
/* Call the callback */
if (handle->out.callback != NULL)
{
(handle->out.callback)(base, handle, kStatus_ASRCConvertError, handle->userData);
}
}
/* Handle transfer */
if ((status & ((uint32_t)kASRC_StatusPairCOutputReady | (uint32_t)kASRC_StatusPairAOutputReady |
(uint32_t)kASRC_StatusPairBOutputReady)) != 0U)
{
if (handle->out.transferSamples[handle->out.queueDriver] != 0U)
{
ASRC_ReadNonBlocking(base, handle->channelPair,
(uint32_t *)(uint32_t)handle->out.asrcQueue[handle->out.queueDriver],
handle->out.fifoThreshold, handle->out.sampleWidth);
handle->out.transferSamples[handle->out.queueDriver] -= handle->out.fifoThreshold;
handle->out.asrcQueue[handle->out.queueDriver] =
(uint8_t *)((uint32_t)handle->out.asrcQueue[handle->out.queueDriver] +
handle->out.fifoThreshold * handle->out.sampleWidth);
}
}
if ((status & ((uint32_t)kASRC_StatusPairCInputReady | (uint32_t)kASRC_StatusPairBInputReady |
(uint32_t)kASRC_StatusPairAInputReady)) != 0U)
{
/* Judge if the data need to transmit is less than space */
uint32_t size = MIN((handle->in.transferSamples[handle->in.queueDriver]),
(size_t)((FSL_ASRC_CHANNEL_PAIR_FIFO_DEPTH * (uint32_t)handle->audioDataChannels -
handle->in.fifoThreshold)));
ASRC_WriteNonBlocking(base, handle->channelPair,
(uint32_t *)(uint32_t)handle->in.asrcQueue[handle->in.queueDriver], size,
handle->in.sampleMask, handle->in.sampleWidth);
handle->in.transferSamples[handle->in.queueDriver] -= size;
handle->in.asrcQueue[handle->in.queueDriver] =
(uint8_t *)((uint32_t)handle->in.asrcQueue[handle->in.queueDriver] + size * handle->in.sampleWidth);
}
/* If finished a block, call the callback function */
if (handle->in.transferSamples[handle->in.queueDriver] == 0U)
{
handle->in.asrcQueue[handle->in.queueDriver] = NULL;
handle->in.queueDriver = (handle->in.queueDriver + 1U) % ASRC_XFER_QUEUE_SIZE;
if (handle->in.callback != NULL)
{
(handle->in.callback)(base, handle, kStatus_ASRCIdle, handle->userData);
}
}
if (handle->out.transferSamples[handle->out.queueDriver] < (handle->out.fifoThreshold + 1U))
{
handle->out.transferSamples[handle->out.queueDriver] -= ASRC_GetRemainFifoSamples(
base, handle->channelPair, (uint32_t *)(uint32_t)handle->out.asrcQueue[handle->out.queueDriver],
handle->out.sampleWidth, handle->out.transferSamples[handle->out.queueDriver]);
}
if (handle->out.transferSamples[handle->out.queueDriver] == 0U)
{
handle->out.asrcQueue[handle->out.queueDriver] = NULL;
handle->out.queueDriver = (handle->out.queueDriver + 1U) % ASRC_XFER_QUEUE_SIZE;
if (handle->out.callback != NULL)
{
(handle->out.callback)(base, handle, kStatus_ASRCIdle, handle->userData);
}
}
/* If all data finished, just stop the transfer */
if (handle->out.asrcQueue[handle->out.queueDriver] == NULL)
{
ASRC_TransferAbortConvert(base, handle);
}
}
#if defined ASRC
void ASRC_DriverIRQHandler(void);
void ASRC_DriverIRQHandler(void)
{
/* channel PAIR A interrupt handling*/
if ((ASRC->ASRSTR & (uint32_t)kASRC_StatusPairAInterrupt) != 0U)
{
s_asrcIsr(ASRC, s_asrcHandle[0][0U]);
}
/* channel PAIR B interrupt handling*/
if ((ASRC->ASRSTR & (uint32_t)kASRC_StatusPairBInterrupt) != 0U)
{
s_asrcIsr(ASRC, s_asrcHandle[0][1U]);
}
/* channel PAIR C interrupt handling*/
if ((ASRC->ASRSTR & (uint32_t)kASRC_StatusPairCInterrupt) != 0U)
{
s_asrcIsr(ASRC, s_asrcHandle[0][2U]);
}
SDK_ISR_EXIT_BARRIER;
}
#endif /* ASRC */