/* * 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 */