86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
/*
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* Copyright 2019 NXP
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include "sai.h"
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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/*******************************************************************************
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* Prototypes
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******************************************************************************/
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/*******************************************************************************
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* Variables
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******************************************************************************/
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extern sai_edma_handle_t txHandle;
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extern sai_edma_handle_t rxHandle;
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extern uint8_t audioBuff[BUFFER_SIZE * BUFFER_NUM];
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extern volatile bool istxFinished;
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extern volatile bool isrxFinished;
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extern volatile uint32_t beginCount;
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extern volatile uint32_t sendCount;
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extern volatile uint32_t receiveCount;
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extern volatile uint32_t fullBlock;
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extern volatile uint32_t emptyBlock;
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/*******************************************************************************
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* Code
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******************************************************************************/
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void RecordPlayback(I2S_Type *base, uint32_t time_s)
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{
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sai_transfer_t xfer = {0};
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uint32_t playbackCount = 0, recordCount = 0;
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uint32_t txindex = 0, rxindex = 0;
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/* First clear the buffer */
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memset(audioBuff, 0, BUFFER_SIZE * BUFFER_NUM);
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istxFinished = false;
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isrxFinished = false;
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sendCount = 0;
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receiveCount = 0;
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/* Reset SAI internal logic */
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SAI_TxSoftwareReset(base, kSAI_ResetTypeSoftware);
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SAI_RxSoftwareReset(base, kSAI_ResetTypeSoftware);
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/* Compute the begin count */
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beginCount = time_s * DEMO_AUDIO_SAMPLE_RATE * 4u / BUFFER_SIZE;
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xfer.dataSize = BUFFER_SIZE;
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/* Wait for playback finished */
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while ((recordCount < beginCount) || (playbackCount < beginCount))
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{
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if ((emptyBlock > 0) && (recordCount < beginCount))
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{
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xfer.data = audioBuff + rxindex * BUFFER_SIZE;
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if (SAI_TransferReceiveEDMA(base, &rxHandle, &xfer) == kStatus_Success)
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{
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rxindex = (rxindex + 1U) % BUFFER_NUM;
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emptyBlock--;
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recordCount++;
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}
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}
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if ((fullBlock > 0) && (playbackCount < beginCount))
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{
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xfer.data = audioBuff + txindex * BUFFER_SIZE;
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if (SAI_TransferSendEDMA(base, &txHandle, &xfer) == kStatus_Success)
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{
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txindex = (txindex + 1U) % BUFFER_NUM;
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fullBlock--;
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playbackCount++;
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}
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}
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}
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/* Wait for record and playback finished */
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while ((istxFinished != true) || (isrxFinished != true))
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{
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}
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}
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