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rt-thread/bsp/lpc54114-lite/Libraries/devices/LPC54114/drivers/fsl_i2s.c

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[bsp]add bsp lpc54114-lite
2018-12-05 11:44:53 +08:00
/*
* The Clear BSD License
* Copyright (c) 2016, Freescale Semiconductor, Inc.
* Copyright 2016-2017 NXP
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted (subject to the limitations in the disclaimer below) provided
* that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* o Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "fsl_i2s.h"
#include "fsl_flexcomm.h"
#include <string.h>
/*******************************************************************************
* Definitions
******************************************************************************/
/* Component ID definition, used by tools. */
#ifndef FSL_COMPONENT_ID
#define FSL_COMPONENT_ID "platform.drivers.flexcomm_i2s"
#endif
/* TODO - absent in device header files, should be there */
#define I2S_FIFOCFG_TXI2SE0_MASK (0x4U)
#define I2S_FIFOCFG_TXI2SE0_SHIFT (2U)
#define I2S_FIFOCFG_TXI2SE0(x) (((uint32_t)(((uint32_t)(x)) << I2S_FIFOCFG_TXI2SE0_SHIFT)) & I2S_FIFOCFG_TXI2SE0_MASK)
#define I2S_FIFOCFG_PACK48_MASK (0x8U)
#define I2S_FIFOCFG_PACK48_SHIFT (3U)
#define I2S_FIFOCFG_PACK48(x) (((uint32_t)(((uint32_t)(x)) << I2S_FIFOCFG_PACK48_SHIFT)) & I2S_FIFOCFG_PACK48_MASK)
/*! @brief I2S states. */
enum _i2s_state
{
kI2S_StateIdle = 0x0, /*!< Not performing transfer */
kI2S_StateTx, /*!< Performing transmit */
kI2S_StateTxWaitToWriteDummyData, /*!< Wait on FIFO in order to write final dummy data there */
kI2S_StateTxWaitForEmptyFifo, /*!< Wait for FIFO to be flushed */
kI2S_StateRx, /*!< Performing receive */
};
/*******************************************************************************
* Prototypes
******************************************************************************/
static void I2S_Config(I2S_Type *base, const i2s_config_t *config);
static void I2S_TxEnable(I2S_Type *base, bool enable);
static void I2S_RxEnable(I2S_Type *base, bool enable);
static status_t I2S_ValidateBuffer(i2s_handle_t *handle, i2s_transfer_t *transfer);
/*******************************************************************************
* Code
******************************************************************************/
void I2S_TxInit(I2S_Type *base, const i2s_config_t *config)
{
uint32_t cfg = 0U;
uint32_t trig = 0U;
FLEXCOMM_Init(base, FLEXCOMM_PERIPH_I2S_TX);
I2S_Config(base, config);
/* Configure FIFO */
cfg |= I2S_FIFOCFG_ENABLETX(1U); /* enable TX FIFO */
cfg |= I2S_FIFOCFG_EMPTYTX(1U); /* empty TX FIFO */
cfg |= I2S_FIFOCFG_TXI2SE0(config->txEmptyZero); /* transmit zero when buffer becomes empty or last item */
cfg |= I2S_FIFOCFG_PACK48(config->pack48); /* set pack 48-bit format or not */
trig |= I2S_FIFOTRIG_TXLVLENA(1U); /* enable TX FIFO trigger */
trig |= I2S_FIFOTRIG_TXLVL(config->watermark); /* set TX FIFO trigger level */
base->FIFOCFG = cfg;
base->FIFOTRIG = trig;
}
void I2S_RxInit(I2S_Type *base, const i2s_config_t *config)
{
uint32_t cfg = 0U;
uint32_t trig = 0U;
FLEXCOMM_Init(base, FLEXCOMM_PERIPH_I2S_RX);
I2S_Config(base, config);
/* Configure FIFO */
cfg |= I2S_FIFOCFG_ENABLERX(1U); /* enable RX FIFO */
cfg |= I2S_FIFOCFG_EMPTYRX(1U); /* empty RX FIFO */
cfg |= I2S_FIFOCFG_PACK48(config->pack48); /* set pack 48-bit format or not */
trig |= I2S_FIFOTRIG_RXLVLENA(1U); /* enable RX FIFO trigger */
trig |= I2S_FIFOTRIG_RXLVL(config->watermark); /* set RX FIFO trigger level */
base->FIFOCFG = cfg;
base->FIFOTRIG = trig;
}
void I2S_TxGetDefaultConfig(i2s_config_t *config)
{
config->masterSlave = kI2S_MasterSlaveNormalMaster;
config->mode = kI2S_ModeI2sClassic;
config->rightLow = false;
config->leftJust = false;
config->pdmData = false;
config->sckPol = false;
config->wsPol = false;
config->divider = 1U;
config->oneChannel = false;
config->dataLength = 16U;
config->frameLength = 32U;
config->position = 0U;
config->watermark = 4U;
config->txEmptyZero = true;
config->pack48 = false;
}
void I2S_RxGetDefaultConfig(i2s_config_t *config)
{
config->masterSlave = kI2S_MasterSlaveNormalSlave;
config->mode = kI2S_ModeI2sClassic;
config->rightLow = false;
config->leftJust = false;
config->pdmData = false;
config->sckPol = false;
config->wsPol = false;
config->divider = 1U;
config->oneChannel = false;
config->dataLength = 16U;
config->frameLength = 32U;
config->position = 0U;
config->watermark = 4U;
config->txEmptyZero = false;
config->pack48 = false;
}
static void I2S_Config(I2S_Type *base, const i2s_config_t *config)
{
assert(config);
uint32_t cfg1 = 0U;
uint32_t cfg2 = 0U;
/* set master/slave configuration */
cfg1 |= I2S_CFG1_MSTSLVCFG(config->masterSlave);
/* set I2S mode */
cfg1 |= I2S_CFG1_MODE(config->mode);
/* set right low (channel swap) */
cfg1 |= I2S_CFG1_RIGHTLOW(config->rightLow);
/* set data justification */
cfg1 |= I2S_CFG1_LEFTJUST(config->leftJust);
/* set source to PDM dmic */
cfg1 |= I2S_CFG1_PDMDATA(config->pdmData);
/* set SCLK polarity */
cfg1 |= I2S_CFG1_SCK_POL(config->sckPol);
/* set WS polarity */
cfg1 |= I2S_CFG1_WS_POL(config->wsPol);
/* set mono mode */
cfg1 |= I2S_CFG1_ONECHANNEL(config->oneChannel);
/* set data length */
cfg1 |= I2S_CFG1_DATALEN(config->dataLength - 1U);
/* set frame length */
cfg2 |= I2S_CFG2_FRAMELEN(config->frameLength - 1U);
/* set data position of this channel pair within the frame */
cfg2 |= I2S_CFG2_POSITION(config->position);
/* write to registers */
base->CFG1 = cfg1;
base->CFG2 = cfg2;
/* set the clock divider */
base->DIV = I2S_DIV_DIV(config->divider - 1U);
}
void I2S_Deinit(I2S_Type *base)
{
/* TODO gate FLEXCOMM clock via FLEXCOMM driver */
}
static void I2S_TxEnable(I2S_Type *base, bool enable)
{
if (enable)
{
I2S_EnableInterrupts(base, kI2S_TxErrorFlag | kI2S_TxLevelFlag);
I2S_Enable(base);
}
else
{
I2S_DisableInterrupts(base, kI2S_TxErrorFlag | kI2S_TxLevelFlag);
I2S_Disable(base);
base->FIFOCFG |= I2S_FIFOCFG_EMPTYTX_MASK;
}
}
static void I2S_RxEnable(I2S_Type *base, bool enable)
{
if (enable)
{
I2S_EnableInterrupts(base, kI2S_RxErrorFlag | kI2S_RxLevelFlag);
I2S_Enable(base);
}
else
{
I2S_DisableInterrupts(base, kI2S_RxErrorFlag | kI2S_RxLevelFlag);
I2S_Disable(base);
base->FIFOCFG |= I2S_FIFOCFG_EMPTYRX_MASK;
}
}
static status_t I2S_ValidateBuffer(i2s_handle_t *handle, i2s_transfer_t *transfer)
{
assert(transfer->data);
if (!transfer->data)
{
return kStatus_InvalidArgument;
}
assert(transfer->dataSize > 0U);
if (transfer->dataSize <= 0U)
{
return kStatus_InvalidArgument;
}
if (handle->dataLength == 4U)
{
/* No alignment and data length requirements */
}
else if ((handle->dataLength >= 5U) && (handle->dataLength <= 8U))
{
assert((((uint32_t)transfer->data) % 2U) == 0U);
if ((((uint32_t)transfer->data) % 2U) != 0U)
{
/* Data not 2-bytes aligned */
return kStatus_InvalidArgument;
}
assert((transfer->dataSize % 2U) == 0U);
if ((transfer->dataSize % 2U) != 0U)
{
/* Data not in pairs of left/right channel bytes */
return kStatus_InvalidArgument;
}
}
else if ((handle->dataLength >= 9U) && (handle->dataLength <= 16U))
{
assert((((uint32_t)transfer->data) % 4U) == 0U);
if ((((uint32_t)transfer->data) % 4U) != 0U)
{
/* Data not 4-bytes aligned */
return kStatus_InvalidArgument;
}
assert((transfer->dataSize % 4U) == 0U);
if ((transfer->dataSize % 4U) != 0U)
{
/* Data lenght not multiply of 4 */
return kStatus_InvalidArgument;
}
}
else if ((handle->dataLength >= 17U) && (handle->dataLength <= 24U))
{
assert((transfer->dataSize % 6U) == 0U);
if ((transfer->dataSize % 6U) != 0U)
{
/* Data lenght not multiply of 6 */
return kStatus_InvalidArgument;
}
assert(!((handle->pack48) && ((((uint32_t)transfer->data) % 4U) != 0U)));
if ((handle->pack48) && ((((uint32_t)transfer->data) % 4U) != 0U))
{
/* Data not 4-bytes aligned */
return kStatus_InvalidArgument;
}
}
else /* if (handle->dataLength >= 25U) */
{
assert((((uint32_t)transfer->data) % 4U) == 0U);
if ((((uint32_t)transfer->data) % 4U) != 0U)
{
/* Data not 4-bytes aligned */
return kStatus_InvalidArgument;
}
if (handle->oneChannel)
{
assert((transfer->dataSize % 4U) == 0U);
if ((transfer->dataSize % 4U) != 0U)
{
/* Data lenght not multiply of 4 */
return kStatus_InvalidArgument;
}
}
else
{
assert((transfer->dataSize % 8U) == 0U);
if ((transfer->dataSize % 8U) != 0U)
{
/* Data lenght not multiply of 8 */
return kStatus_InvalidArgument;
}
}
}
return kStatus_Success;
}
void I2S_TxTransferCreateHandle(I2S_Type *base, i2s_handle_t *handle, i2s_transfer_callback_t callback, void *userData)
{
assert(handle);
/* Clear out the handle */
memset(handle, 0U, sizeof(*handle));
/* Save callback and user data */
handle->completionCallback = callback;
handle->userData = userData;
/* Remember some items set previously by configuration */
handle->watermark = ((base->FIFOTRIG & I2S_FIFOTRIG_TXLVL_MASK) >> I2S_FIFOTRIG_TXLVL_SHIFT);
handle->oneChannel = ((base->CFG1 & I2S_CFG1_ONECHANNEL_MASK) >> I2S_CFG1_ONECHANNEL_SHIFT);
handle->dataLength = ((base->CFG1 & I2S_CFG1_DATALEN_MASK) >> I2S_CFG1_DATALEN_SHIFT) + 1U;
handle->pack48 = ((base->FIFOCFG & I2S_FIFOCFG_PACK48_MASK) >> I2S_FIFOCFG_PACK48_SHIFT);
handle->useFifo48H = false;
/* Register IRQ handling */
FLEXCOMM_SetIRQHandler(base, (flexcomm_irq_handler_t)I2S_TxHandleIRQ, handle);
}
status_t I2S_TxTransferNonBlocking(I2S_Type *base, i2s_handle_t *handle, i2s_transfer_t transfer)
{
assert(handle);
if (!handle)
{
return kStatus_InvalidArgument;
}
status_t result;
result = I2S_ValidateBuffer(handle, &transfer);
if (result != kStatus_Success)
{
return result;
}
if (handle->i2sQueue[handle->queueUser].dataSize)
{
/* Previously prepared buffers not processed yet */
return kStatus_I2S_Busy;
}
handle->state = kI2S_StateTx;
handle->i2sQueue[handle->queueUser].data = transfer.data;
handle->i2sQueue[handle->queueUser].dataSize = transfer.dataSize;
handle->queueUser = (handle->queueUser + 1U) % I2S_NUM_BUFFERS;
base->FIFOTRIG = (base->FIFOTRIG & (~I2S_FIFOTRIG_TXLVL_MASK)) | I2S_FIFOTRIG_TXLVL(handle->watermark);
I2S_TxEnable(base, true);
return kStatus_Success;
}
void I2S_TxTransferAbort(I2S_Type *base, i2s_handle_t *handle)
{
assert(handle);
/* Disable I2S operation and interrupts */
I2S_TxEnable(base, false);
/* Reset state */
handle->state = kI2S_StateIdle;
/* Clear transfer queue */
memset((void *)&handle->i2sQueue, 0U, sizeof(i2s_transfer_t) * I2S_NUM_BUFFERS);
handle->queueDriver = 0U;
handle->queueUser = 0U;
}
void I2S_RxTransferCreateHandle(I2S_Type *base, i2s_handle_t *handle, i2s_transfer_callback_t callback, void *userData)
{
assert(handle);
/* Clear out the handle */
memset(handle, 0U, sizeof(*handle));
/* Save callback and user data */
handle->completionCallback = callback;
handle->userData = userData;
/* Remember some items set previously by configuration */
handle->watermark = ((base->FIFOTRIG & I2S_FIFOTRIG_RXLVL_MASK) >> I2S_FIFOTRIG_RXLVL_SHIFT);
handle->oneChannel = ((base->CFG1 & I2S_CFG1_ONECHANNEL_MASK) >> I2S_CFG1_ONECHANNEL_SHIFT);
handle->dataLength = ((base->CFG1 & I2S_CFG1_DATALEN_MASK) >> I2S_CFG1_DATALEN_SHIFT) + 1U;
handle->pack48 = ((base->FIFOCFG & I2S_FIFOCFG_PACK48_MASK) >> I2S_FIFOCFG_PACK48_SHIFT);
handle->useFifo48H = false;
/* Register IRQ handling */
FLEXCOMM_SetIRQHandler(base, (flexcomm_irq_handler_t)I2S_RxHandleIRQ, handle);
}
status_t I2S_RxTransferNonBlocking(I2S_Type *base, i2s_handle_t *handle, i2s_transfer_t transfer)
{
assert(handle);
if (!handle)
{
return kStatus_InvalidArgument;
}
status_t result;
result = I2S_ValidateBuffer(handle, &transfer);
if (result != kStatus_Success)
{
return result;
}
if (handle->i2sQueue[handle->queueUser].dataSize)
{
/* Previously prepared buffers not processed yet */
return kStatus_I2S_Busy;
}
handle->state = kI2S_StateRx;
handle->i2sQueue[handle->queueUser].data = transfer.data;
handle->i2sQueue[handle->queueUser].dataSize = transfer.dataSize;
handle->queueUser = (handle->queueUser + 1U) % I2S_NUM_BUFFERS;
base->FIFOTRIG = (base->FIFOTRIG & (~I2S_FIFOTRIG_RXLVL_MASK)) | I2S_FIFOTRIG_RXLVL(handle->watermark);
I2S_RxEnable(base, true);
return kStatus_Success;
}
void I2S_RxTransferAbort(I2S_Type *base, i2s_handle_t *handle)
{
assert(handle);
/* Disable I2S operation and interrupts */
I2S_RxEnable(base, false);
/* Reset state */
handle->state = kI2S_StateIdle;
/* Clear transfer queue */
memset((void *)&handle->i2sQueue, 0U, sizeof(i2s_transfer_t) * I2S_NUM_BUFFERS);
handle->queueDriver = 0U;
handle->queueUser = 0U;
}
status_t I2S_TransferGetCount(I2S_Type *base, i2s_handle_t *handle, size_t *count)
{
assert(handle);
if (!handle)
{
return kStatus_InvalidArgument;
}
assert(count);
if (!count)
{
return kStatus_InvalidArgument;
}
if (handle->state == kI2S_StateIdle)
{
return kStatus_NoTransferInProgress;
}
*count = handle->transferCount;
return kStatus_Success;
}
status_t I2S_TransferGetErrorCount(I2S_Type *base, i2s_handle_t *handle, size_t *count)
{
assert(handle);
if (!handle)
{
return kStatus_InvalidArgument;
}
assert(count);
if (!count)
{
return kStatus_InvalidArgument;
}
if (handle->state == kI2S_StateIdle)
{
return kStatus_NoTransferInProgress;
}
*count = handle->errorCount;
return kStatus_Success;
}
void I2S_TxHandleIRQ(I2S_Type *base, i2s_handle_t *handle)
{
uint32_t intstat = base->FIFOINTSTAT;
uint32_t data;
if (intstat & I2S_FIFOINTSTAT_TXERR_MASK)
{
handle->errorCount++;
/* Clear TX error interrupt flag */
base->FIFOSTAT = I2S_FIFOSTAT_TXERR(1U);
}
if (intstat & I2S_FIFOINTSTAT_TXLVL_MASK)
{
if (handle->state == kI2S_StateTx)
{
/* Send data */
while ((base->FIFOSTAT & I2S_FIFOSTAT_TXNOTFULL_MASK) &&
(handle->i2sQueue[handle->queueDriver].dataSize > 0U))
{
/* Write output data */
if (handle->dataLength == 4U)
{
data = *(handle->i2sQueue[handle->queueDriver].data);
base->FIFOWR = ((data & 0xF0U) << 12U) | (data & 0xFU);
handle->i2sQueue[handle->queueDriver].data++;
handle->transferCount++;
handle->i2sQueue[handle->queueDriver].dataSize--;
}
else if (handle->dataLength <= 8U)
{
data = *((volatile uint16_t *)handle->i2sQueue[handle->queueDriver].data);
base->FIFOWR = ((data & 0xFF00U) << 8U) | (data & 0xFFU);
handle->i2sQueue[handle->queueDriver].data += sizeof(uint16_t);
handle->transferCount += sizeof(uint16_t);
handle->i2sQueue[handle->queueDriver].dataSize -= sizeof(uint16_t);
}
else if (handle->dataLength <= 16U)
{
base->FIFOWR = *((volatile uint32_t *)(handle->i2sQueue[handle->queueDriver].data));
handle->i2sQueue[handle->queueDriver].data += sizeof(uint32_t);
handle->transferCount += sizeof(uint32_t);
handle->i2sQueue[handle->queueDriver].dataSize -= sizeof(uint32_t);
}
else if (handle->dataLength <= 24U)
{
if (handle->pack48)
{
if (handle->useFifo48H)
{
base->FIFOWR48H = *((volatile uint16_t *)(handle->i2sQueue[handle->queueDriver].data));
handle->i2sQueue[handle->queueDriver].data += sizeof(uint16_t);
handle->transferCount += sizeof(uint16_t);
handle->i2sQueue[handle->queueDriver].dataSize -= sizeof(uint16_t);
handle->useFifo48H = false;
}
else
{
base->FIFOWR = *((volatile uint32_t *)(handle->i2sQueue[handle->queueDriver].data));
handle->i2sQueue[handle->queueDriver].data += sizeof(uint32_t);
handle->transferCount += sizeof(uint32_t);
handle->i2sQueue[handle->queueDriver].dataSize -= sizeof(uint32_t);
handle->useFifo48H = true;
}
}
else
{
data = (uint32_t)(*(handle->i2sQueue[handle->queueDriver].data++));
data |= ((uint32_t)(*(handle->i2sQueue[handle->queueDriver].data++))) << 8U;
data |= ((uint32_t)(*(handle->i2sQueue[handle->queueDriver].data++))) << 16U;
if (handle->useFifo48H)
{
base->FIFOWR48H = data;
handle->useFifo48H = false;
}
else
{
base->FIFOWR = data;
handle->useFifo48H = true;
}
handle->transferCount += 3U;
handle->i2sQueue[handle->queueDriver].dataSize -= 3U;
}
}
else /* if (handle->dataLength <= 32U) */
{
base->FIFOWR = *((volatile uint32_t *)(handle->i2sQueue[handle->queueDriver].data));
handle->i2sQueue[handle->queueDriver].data += sizeof(uint32_t);
handle->transferCount += sizeof(uint32_t);
handle->i2sQueue[handle->queueDriver].dataSize -= sizeof(uint32_t);
}
if (handle->i2sQueue[handle->queueDriver].dataSize == 0U)
{
/* Actual data buffer sent out, switch to a next one */
handle->queueDriver = (handle->queueDriver + 1U) % I2S_NUM_BUFFERS;
/* Notify user */
if (handle->completionCallback)
{
handle->completionCallback(base, handle, kStatus_I2S_BufferComplete, handle->userData);
}
/* Check if the next buffer contains anything to send */
if (handle->i2sQueue[handle->queueDriver].dataSize == 0U)
{
/* Everything has been written to FIFO */
handle->state = kI2S_StateTxWaitToWriteDummyData;
break;
}
}
}
}
else if (handle->state == kI2S_StateTxWaitToWriteDummyData)
{
/* Write dummy data */
if ((handle->dataLength > 16U) && (handle->dataLength < 25U))
{
if (handle->useFifo48H)
{
base->FIFOWR48H = 0U;
handle->useFifo48H = false;
}
else
{
base->FIFOWR = 0U;
base->FIFOWR48H = 0U;
}
}
else
{
base->FIFOWR = 0U;
}
/* Next time invoke this handler when FIFO becomes empty (TX level 0) */
base->FIFOTRIG &= ~I2S_FIFOTRIG_TXLVL_MASK;
handle->state = kI2S_StateTxWaitForEmptyFifo;
}
else if (handle->state == kI2S_StateTxWaitForEmptyFifo)
{
/* FIFO, including additional dummy data, has been emptied now,
* all relevant data should have been output from peripheral */
/* Stop transfer */
I2S_Disable(base);
I2S_DisableInterrupts(base, kI2S_TxErrorFlag | kI2S_TxLevelFlag);
base->FIFOCFG |= I2S_FIFOCFG_EMPTYTX_MASK;
/* Reset state */
handle->state = kI2S_StateIdle;
/* Notify user */
if (handle->completionCallback)
{
handle->completionCallback(base, handle, kStatus_I2S_Done, handle->userData);
}
}
else
{
/* Do nothing */
}
/* Clear TX level interrupt flag */
base->FIFOSTAT = I2S_FIFOSTAT_TXLVL(1U);
}
}
void I2S_RxHandleIRQ(I2S_Type *base, i2s_handle_t *handle)
{
uint32_t intstat = base->FIFOINTSTAT;
uint32_t data;
if (intstat & I2S_FIFOINTSTAT_RXERR_MASK)
{
handle->errorCount++;
/* Clear RX error interrupt flag */
base->FIFOSTAT = I2S_FIFOSTAT_RXERR(1U);
}
if (intstat & I2S_FIFOINTSTAT_RXLVL_MASK)
{
while ((base->FIFOSTAT & I2S_FIFOSTAT_RXNOTEMPTY_MASK) && (handle->i2sQueue[handle->queueDriver].dataSize > 0U))
{
/* Read input data */
if (handle->dataLength == 4U)
{
data = base->FIFORD;
*(handle->i2sQueue[handle->queueDriver].data) = ((data & 0x000F0000U) >> 12U) | (data & 0x0000000FU);
handle->i2sQueue[handle->queueDriver].data++;
handle->transferCount++;
handle->i2sQueue[handle->queueDriver].dataSize--;
}
else if (handle->dataLength <= 8U)
{
data = base->FIFORD;
*((volatile uint16_t *)handle->i2sQueue[handle->queueDriver].data) = ((data >> 8U) & 0xFF00U) | (data & 0xFFU);
handle->i2sQueue[handle->queueDriver].data += sizeof(uint16_t);
handle->transferCount += sizeof(uint16_t);
handle->i2sQueue[handle->queueDriver].dataSize -= sizeof(uint16_t);
}
else if (handle->dataLength <= 16U)
{
data = base->FIFORD;
*((volatile uint32_t *)handle->i2sQueue[handle->queueDriver].data) = data;
handle->i2sQueue[handle->queueDriver].data += sizeof(uint32_t);
handle->transferCount += sizeof(uint32_t);
handle->i2sQueue[handle->queueDriver].dataSize -= sizeof(uint32_t);
}
else if (handle->dataLength <= 24U)
{
if (handle->pack48)
{
if (handle->useFifo48H)
{
data = base->FIFORD48H;
handle->useFifo48H = false;
*((volatile uint16_t *)handle->i2sQueue[handle->queueDriver].data) = data;
handle->i2sQueue[handle->queueDriver].data += sizeof(uint16_t);
handle->transferCount += sizeof(uint16_t);
handle->i2sQueue[handle->queueDriver].dataSize -= sizeof(uint16_t);
}
else
{
data = base->FIFORD;
handle->useFifo48H = true;
*((volatile uint32_t *)handle->i2sQueue[handle->queueDriver].data) = data;
handle->i2sQueue[handle->queueDriver].data += sizeof(uint32_t);
handle->transferCount += sizeof(uint32_t);
handle->i2sQueue[handle->queueDriver].dataSize -= sizeof(uint32_t);
}
}
else
{
if (handle->useFifo48H)
{
data = base->FIFORD48H;
handle->useFifo48H = false;
}
else
{
data = base->FIFORD;
handle->useFifo48H = true;
}
*(handle->i2sQueue[handle->queueDriver].data++) = data & 0xFFU;
*(handle->i2sQueue[handle->queueDriver].data++) = (data >> 8U) & 0xFFU;
*(handle->i2sQueue[handle->queueDriver].data++) = (data >> 16U) & 0xFFU;
handle->transferCount += 3U;
handle->i2sQueue[handle->queueDriver].dataSize -= 3U;
}
}
else /* if (handle->dataLength <= 32U) */
{
data = base->FIFORD;
*((volatile uint32_t *)handle->i2sQueue[handle->queueDriver].data) = data;
handle->i2sQueue[handle->queueDriver].data += sizeof(uint32_t);
handle->transferCount += sizeof(uint32_t);
handle->i2sQueue[handle->queueDriver].dataSize -= sizeof(uint32_t);
}
if (handle->i2sQueue[handle->queueDriver].dataSize == 0U)
{
/* Actual data buffer filled with input data, switch to a next one */
handle->queueDriver = (handle->queueDriver + 1U) % I2S_NUM_BUFFERS;
/* Notify user */
if (handle->completionCallback)
{
handle->completionCallback(base, handle, kStatus_I2S_BufferComplete, handle->userData);
}
if (handle->i2sQueue[handle->queueDriver].dataSize == 0U)
{
/* No other buffer prepared to receive data into */
/* Disable I2S operation and interrupts */
I2S_Disable(base);
I2S_DisableInterrupts(base, kI2S_RxErrorFlag | kI2S_RxLevelFlag);
base->FIFOCFG |= I2S_FIFOCFG_EMPTYRX_MASK;
/* Reset state */
handle->state = kI2S_StateIdle;
/* Notify user */
if (handle->completionCallback)
{
handle->completionCallback(base, handle, kStatus_I2S_Done, handle->userData);
}
/* Clear RX level interrupt flag */
base->FIFOSTAT = I2S_FIFOSTAT_RXLVL(1U);
return;
}
}
}
/* Clear RX level interrupt flag */
base->FIFOSTAT = I2S_FIFOSTAT_RXLVL(1U);
}
}