/* * Copyright (c) 2015, Freescale Semiconductor, Inc. * Copyright 2016-2018 NXP * All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ #ifndef _FSL_FLEXIO_I2S_H_ #define _FSL_FLEXIO_I2S_H_ #include "fsl_common.h" #include "fsl_flexio.h" /*! * @addtogroup flexio_i2s * @{ */ /******************************************************************************* * Definitions ******************************************************************************/ /*! @name Driver version */ /*@{*/ /*! @brief FlexIO I2S driver version 2.1.6. */ #define FSL_FLEXIO_I2S_DRIVER_VERSION (MAKE_VERSION(2, 1, 6)) /*@}*/ /*! @brief FlexIO I2S transfer status */ enum _flexio_i2s_status { kStatus_FLEXIO_I2S_Idle = MAKE_STATUS(kStatusGroup_FLEXIO_I2S, 0), /*!< FlexIO I2S is in idle state */ kStatus_FLEXIO_I2S_TxBusy = MAKE_STATUS(kStatusGroup_FLEXIO_I2S, 1), /*!< FlexIO I2S Tx is busy */ kStatus_FLEXIO_I2S_RxBusy = MAKE_STATUS(kStatusGroup_FLEXIO_I2S, 2), /*!< FlexIO I2S Tx is busy */ kStatus_FLEXIO_I2S_Error = MAKE_STATUS(kStatusGroup_FLEXIO_I2S, 3), /*!< FlexIO I2S error occurred */ kStatus_FLEXIO_I2S_QueueFull = MAKE_STATUS(kStatusGroup_FLEXIO_I2S, 4), /*!< FlexIO I2S transfer queue is full. */ }; /*! @brief Define FlexIO I2S access structure typedef */ typedef struct _flexio_i2s_type { FLEXIO_Type *flexioBase; /*!< FlexIO base pointer */ uint8_t txPinIndex; /*!< Tx data pin index in FlexIO pins */ uint8_t rxPinIndex; /*!< Rx data pin index */ uint8_t bclkPinIndex; /*!< Bit clock pin index */ uint8_t fsPinIndex; /*!< Frame sync pin index */ uint8_t txShifterIndex; /*!< Tx data shifter index */ uint8_t rxShifterIndex; /*!< Rx data shifter index */ uint8_t bclkTimerIndex; /*!< Bit clock timer index */ uint8_t fsTimerIndex; /*!< Frame sync timer index */ } FLEXIO_I2S_Type; /*! @brief Master or slave mode */ typedef enum _flexio_i2s_master_slave { kFLEXIO_I2S_Master = 0x0U, /*!< Master mode */ kFLEXIO_I2S_Slave = 0x1U /*!< Slave mode */ } flexio_i2s_master_slave_t; /*! @brief Define FlexIO FlexIO I2S interrupt mask. */ enum _flexio_i2s_interrupt_enable { kFLEXIO_I2S_TxDataRegEmptyInterruptEnable = 0x1U, /*!< Transmit buffer empty interrupt enable. */ kFLEXIO_I2S_RxDataRegFullInterruptEnable = 0x2U, /*!< Receive buffer full interrupt enable. */ }; /*! @brief Define FlexIO FlexIO I2S status mask. */ enum _flexio_i2s_status_flags { kFLEXIO_I2S_TxDataRegEmptyFlag = 0x1U, /*!< Transmit buffer empty flag. */ kFLEXIO_I2S_RxDataRegFullFlag = 0x2U, /*!< Receive buffer full flag. */ }; /*! @brief FlexIO I2S configure structure */ typedef struct _flexio_i2s_config { bool enableI2S; /*!< Enable FlexIO I2S */ flexio_i2s_master_slave_t masterSlave; /*!< Master or slave */ flexio_pin_polarity_t txPinPolarity; /*!< Tx data pin polarity, active high or low */ flexio_pin_polarity_t rxPinPolarity; /*!< Rx data pin polarity */ flexio_pin_polarity_t bclkPinPolarity; /*!< Bit clock pin polarity */ flexio_pin_polarity_t fsPinPolarity; /*!< Frame sync pin polarity */ flexio_shifter_timer_polarity_t txTimerPolarity; /*!< Tx data valid on bclk rising or falling edge */ flexio_shifter_timer_polarity_t rxTimerPolarity; /*!< Rx data valid on bclk rising or falling edge */ } flexio_i2s_config_t; /*! @brief FlexIO I2S audio format, FlexIO I2S only support the same format in Tx and Rx */ typedef struct _flexio_i2s_format { uint8_t bitWidth; /*!< Bit width of audio data, always 8/16/24/32 bits */ uint32_t sampleRate_Hz; /*!< Sample rate of the audio data */ } flexio_i2s_format_t; /*!@brief FlexIO I2S transfer queue size, user can refine it according to use case. */ #define FLEXIO_I2S_XFER_QUEUE_SIZE (4) /*! @brief Audio sample rate */ typedef enum _flexio_i2s_sample_rate { kFLEXIO_I2S_SampleRate8KHz = 8000U, /*!< Sample rate 8000Hz */ kFLEXIO_I2S_SampleRate11025Hz = 11025U, /*!< Sample rate 11025Hz */ kFLEXIO_I2S_SampleRate12KHz = 12000U, /*!< Sample rate 12000Hz */ kFLEXIO_I2S_SampleRate16KHz = 16000U, /*!< Sample rate 16000Hz */ kFLEXIO_I2S_SampleRate22050Hz = 22050U, /*!< Sample rate 22050Hz */ kFLEXIO_I2S_SampleRate24KHz = 24000U, /*!< Sample rate 24000Hz */ kFLEXIO_I2S_SampleRate32KHz = 32000U, /*!< Sample rate 32000Hz */ kFLEXIO_I2S_SampleRate44100Hz = 44100U, /*!< Sample rate 44100Hz */ kFLEXIO_I2S_SampleRate48KHz = 48000U, /*!< Sample rate 48000Hz */ kFLEXIO_I2S_SampleRate96KHz = 96000U /*!< Sample rate 96000Hz */ } flexio_i2s_sample_rate_t; /*! @brief Audio word width */ typedef enum _flexio_i2s_word_width { kFLEXIO_I2S_WordWidth8bits = 8U, /*!< Audio data width 8 bits */ kFLEXIO_I2S_WordWidth16bits = 16U, /*!< Audio data width 16 bits */ kFLEXIO_I2S_WordWidth24bits = 24U, /*!< Audio data width 24 bits */ kFLEXIO_I2S_WordWidth32bits = 32U /*!< Audio data width 32 bits */ } flexio_i2s_word_width_t; /*! @brief Define FlexIO I2S transfer structure. */ typedef struct _flexio_i2s_transfer { uint8_t *data; /*!< Data buffer start pointer */ size_t dataSize; /*!< Bytes to be transferred. */ } flexio_i2s_transfer_t; typedef struct _flexio_i2s_handle flexio_i2s_handle_t; /*! @brief FlexIO I2S xfer callback prototype */ typedef void (*flexio_i2s_callback_t)(FLEXIO_I2S_Type *base, flexio_i2s_handle_t *handle, status_t status, void *userData); /*! @brief Define FlexIO I2S handle structure. */ struct _flexio_i2s_handle { uint32_t state; /*!< Internal state */ flexio_i2s_callback_t callback; /*!< Callback function called at transfer event*/ void *userData; /*!< Callback parameter passed to callback function*/ uint8_t bitWidth; /*!< Bit width for transfer, 8/16/24/32bits */ flexio_i2s_transfer_t queue[FLEXIO_I2S_XFER_QUEUE_SIZE]; /*!< Transfer queue storing queued transfer */ size_t transferSize[FLEXIO_I2S_XFER_QUEUE_SIZE]; /*!< Data bytes need to transfer */ volatile uint8_t queueUser; /*!< Index for user to queue transfer */ volatile uint8_t queueDriver; /*!< Index for driver to get the transfer data and size */ }; /******************************************************************************* * API ******************************************************************************/ #if defined(__cplusplus) extern "C" { #endif /*_cplusplus*/ /*! * @name Initialization and deinitialization * @{ */ /*! * @brief Initializes the FlexIO I2S. * * This API configures FlexIO pins and shifter to I2S and configures the FlexIO I2S with a configuration structure. * The configuration structure can be filled by the user, or be set with default values by * FLEXIO_I2S_GetDefaultConfig(). * * @note This API should be called at the beginning of the application to use * the FlexIO I2S driver. Otherwise, any access to the FlexIO I2S module can cause hard fault * because the clock is not enabled. * * @param base FlexIO I2S base pointer * @param config FlexIO I2S configure structure. */ void FLEXIO_I2S_Init(FLEXIO_I2S_Type *base, const flexio_i2s_config_t *config); /*! * @brief Sets the FlexIO I2S configuration structure to default values. * * The purpose of this API is to get the configuration structure initialized for use in FLEXIO_I2S_Init(). * Users may use the initialized structure unchanged in FLEXIO_I2S_Init() or modify * some fields of the structure before calling FLEXIO_I2S_Init(). * * @param config pointer to master configuration structure */ void FLEXIO_I2S_GetDefaultConfig(flexio_i2s_config_t *config); /*! * @brief De-initializes the FlexIO I2S. * * Calling this API resets the FlexIO I2S shifter and timer config. After calling this API, * call the FLEXO_I2S_Init to use the FlexIO I2S module. * * @param base FlexIO I2S base pointer */ void FLEXIO_I2S_Deinit(FLEXIO_I2S_Type *base); /*! * @brief Enables/disables the FlexIO I2S module operation. * * @param base Pointer to FLEXIO_I2S_Type * @param enable True to enable, false dose not have any effect. */ static inline void FLEXIO_I2S_Enable(FLEXIO_I2S_Type *base, bool enable) { if (enable) { base->flexioBase->CTRL |= FLEXIO_CTRL_FLEXEN_MASK; } } /*! @} */ /*! * @name Status * @{ */ /*! * @brief Gets the FlexIO I2S status flags. * * @param base Pointer to FLEXIO_I2S_Type structure * @return Status flag, which are ORed by the enumerators in the _flexio_i2s_status_flags. */ uint32_t FLEXIO_I2S_GetStatusFlags(FLEXIO_I2S_Type *base); /*! @} */ /*! * @name Interrupts * @{ */ /*! * @brief Enables the FlexIO I2S interrupt. * * This function enables the FlexIO UART interrupt. * * @param base Pointer to FLEXIO_I2S_Type structure * @param mask interrupt source */ void FLEXIO_I2S_EnableInterrupts(FLEXIO_I2S_Type *base, uint32_t mask); /*! * @brief Disables the FlexIO I2S interrupt. * * This function enables the FlexIO UART interrupt. * * @param base pointer to FLEXIO_I2S_Type structure * @param mask interrupt source */ void FLEXIO_I2S_DisableInterrupts(FLEXIO_I2S_Type *base, uint32_t mask); /*! @} */ /*! * @name DMA Control * @{ */ /*! * @brief Enables/disables the FlexIO I2S Tx DMA requests. * * @param base FlexIO I2S base pointer * @param enable True means enable DMA, false means disable DMA. */ static inline void FLEXIO_I2S_TxEnableDMA(FLEXIO_I2S_Type *base, bool enable) { FLEXIO_EnableShifterStatusDMA(base->flexioBase, 1 << base->txShifterIndex, enable); } /*! * @brief Enables/disables the FlexIO I2S Rx DMA requests. * * @param base FlexIO I2S base pointer * @param enable True means enable DMA, false means disable DMA. */ static inline void FLEXIO_I2S_RxEnableDMA(FLEXIO_I2S_Type *base, bool enable) { FLEXIO_EnableShifterStatusDMA(base->flexioBase, 1 << base->rxShifterIndex, enable); } /*! * @brief Gets the FlexIO I2S send data register address. * * This function returns the I2S data register address, mainly used by DMA/eDMA. * * @param base Pointer to FLEXIO_I2S_Type structure * @return FlexIO i2s send data register address. */ static inline uint32_t FLEXIO_I2S_TxGetDataRegisterAddress(FLEXIO_I2S_Type *base) { return FLEXIO_GetShifterBufferAddress(base->flexioBase, kFLEXIO_ShifterBufferBitSwapped, base->txShifterIndex); } /*! * @brief Gets the FlexIO I2S receive data register address. * * This function returns the I2S data register address, mainly used by DMA/eDMA. * * @param base Pointer to FLEXIO_I2S_Type structure * @return FlexIO i2s receive data register address. */ static inline uint32_t FLEXIO_I2S_RxGetDataRegisterAddress(FLEXIO_I2S_Type *base) { return FLEXIO_GetShifterBufferAddress(base->flexioBase, kFLEXIO_ShifterBufferBitSwapped, base->rxShifterIndex); } /*! @} */ /*! * @name Bus Operations * @{ */ /*! * @brief Configures the FlexIO I2S audio format in master mode. * * Audio format can be changed in run-time of FlexIO I2S. This function configures the sample rate and audio data * format to be transferred. * * @param base Pointer to FLEXIO_I2S_Type structure * @param format Pointer to FlexIO I2S audio data format structure. * @param srcClock_Hz I2S master clock source frequency in Hz. */ void FLEXIO_I2S_MasterSetFormat(FLEXIO_I2S_Type *base, flexio_i2s_format_t *format, uint32_t srcClock_Hz); /*! * @brief Configures the FlexIO I2S audio format in slave mode. * * Audio format can be changed in run-time of FlexIO I2S. This function configures the sample rate and audio data * format to be transferred. * * @param base Pointer to FLEXIO_I2S_Type structure * @param format Pointer to FlexIO I2S audio data format structure. */ void FLEXIO_I2S_SlaveSetFormat(FLEXIO_I2S_Type *base, flexio_i2s_format_t *format); /*! * @brief Sends data using a blocking method. * * @note This function blocks via polling until data is ready to be sent. * * @param base FlexIO I2S base pointer. * @param bitWidth How many bits in a audio word, usually 8/16/24/32 bits. * @param txData Pointer to the data to be written. * @param size Bytes to be written. */ void FLEXIO_I2S_WriteBlocking(FLEXIO_I2S_Type *base, uint8_t bitWidth, uint8_t *txData, size_t size); /*! * @brief Writes data into a data register. * * @param base FlexIO I2S base pointer. * @param bitWidth How many bits in a audio word, usually 8/16/24/32 bits. * @param data Data to be written. */ static inline void FLEXIO_I2S_WriteData(FLEXIO_I2S_Type *base, uint8_t bitWidth, uint32_t data) { base->flexioBase->SHIFTBUFBIS[base->txShifterIndex] = (data << (32U - bitWidth)); } /*! * @brief Receives a piece of data using a blocking method. * * @note This function blocks via polling until data is ready to be sent. * * @param base FlexIO I2S base pointer * @param bitWidth How many bits in a audio word, usually 8/16/24/32 bits. * @param rxData Pointer to the data to be read. * @param size Bytes to be read. */ void FLEXIO_I2S_ReadBlocking(FLEXIO_I2S_Type *base, uint8_t bitWidth, uint8_t *rxData, size_t size); /*! * @brief Reads a data from the data register. * * @param base FlexIO I2S base pointer * @return Data read from data register. */ static inline uint32_t FLEXIO_I2S_ReadData(FLEXIO_I2S_Type *base) { return base->flexioBase->SHIFTBUFBIS[base->rxShifterIndex]; } /*! @} */ /*! * @name Transactional * @{ */ /*! * @brief Initializes the FlexIO I2S handle. * * This function initializes the FlexIO I2S handle which can be used for other * FlexIO I2S transactional APIs. Call this API once to get the * initialized handle. * * @param base Pointer to FLEXIO_I2S_Type structure * @param handle Pointer to flexio_i2s_handle_t structure to store the transfer state. * @param callback FlexIO I2S callback function, which is called while finished a block. * @param userData User parameter for the FlexIO I2S callback. */ void FLEXIO_I2S_TransferTxCreateHandle(FLEXIO_I2S_Type *base, flexio_i2s_handle_t *handle, flexio_i2s_callback_t callback, void *userData); /*! * @brief Configures the FlexIO I2S audio format. * * Audio format can be changed at run-time of FlexIO I2S. This function configures the sample rate and audio data * format to be transferred. * * @param base Pointer to FLEXIO_I2S_Type structure. * @param handle FlexIO I2S handle pointer. * @param format Pointer to audio data format structure. * @param srcClock_Hz FlexIO I2S bit clock source frequency in Hz. This parameter should be 0 while in slave mode. */ void FLEXIO_I2S_TransferSetFormat(FLEXIO_I2S_Type *base, flexio_i2s_handle_t *handle, flexio_i2s_format_t *format, uint32_t srcClock_Hz); /*! * @brief Initializes the FlexIO I2S receive handle. * * This function initializes the FlexIO I2S handle which can be used for other * FlexIO I2S transactional APIs. Call this API once to get the * initialized handle. * * @param base Pointer to FLEXIO_I2S_Type structure. * @param handle Pointer to flexio_i2s_handle_t structure to store the transfer state. * @param callback FlexIO I2S callback function, which is called while finished a block. * @param userData User parameter for the FlexIO I2S callback. */ void FLEXIO_I2S_TransferRxCreateHandle(FLEXIO_I2S_Type *base, flexio_i2s_handle_t *handle, flexio_i2s_callback_t callback, void *userData); /*! * @brief Performs an interrupt non-blocking send transfer on FlexIO I2S. * * @note The API returns immediately after transfer initiates. * Call FLEXIO_I2S_GetRemainingBytes to poll the transfer status and check whether * the transfer is finished. If the return status is 0, the transfer is finished. * * @param base Pointer to FLEXIO_I2S_Type structure. * @param handle Pointer to flexio_i2s_handle_t structure which stores the transfer state * @param xfer Pointer to flexio_i2s_transfer_t structure * @retval kStatus_Success Successfully start the data transmission. * @retval kStatus_FLEXIO_I2S_TxBusy Previous transmission still not finished, data not all written to TX register yet. * @retval kStatus_InvalidArgument The input parameter is invalid. */ status_t FLEXIO_I2S_TransferSendNonBlocking(FLEXIO_I2S_Type *base, flexio_i2s_handle_t *handle, flexio_i2s_transfer_t *xfer); /*! * @brief Performs an interrupt non-blocking receive transfer on FlexIO I2S. * * @note The API returns immediately after transfer initiates. * Call FLEXIO_I2S_GetRemainingBytes to poll the transfer status to check whether * the transfer is finished. If the return status is 0, the transfer is finished. * * @param base Pointer to FLEXIO_I2S_Type structure. * @param handle Pointer to flexio_i2s_handle_t structure which stores the transfer state * @param xfer Pointer to flexio_i2s_transfer_t structure * @retval kStatus_Success Successfully start the data receive. * @retval kStatus_FLEXIO_I2S_RxBusy Previous receive still not finished. * @retval kStatus_InvalidArgument The input parameter is invalid. */ status_t FLEXIO_I2S_TransferReceiveNonBlocking(FLEXIO_I2S_Type *base, flexio_i2s_handle_t *handle, flexio_i2s_transfer_t *xfer); /*! * @brief Aborts the current send. * * @note This API can be called at any time when interrupt non-blocking transfer initiates * to abort the transfer in a early time. * * @param base Pointer to FLEXIO_I2S_Type structure. * @param handle Pointer to flexio_i2s_handle_t structure which stores the transfer state */ void FLEXIO_I2S_TransferAbortSend(FLEXIO_I2S_Type *base, flexio_i2s_handle_t *handle); /*! * @brief Aborts the current receive. * * @note This API can be called at any time when interrupt non-blocking transfer initiates * to abort the transfer in a early time. * * @param base Pointer to FLEXIO_I2S_Type structure. * @param handle Pointer to flexio_i2s_handle_t structure which stores the transfer state */ void FLEXIO_I2S_TransferAbortReceive(FLEXIO_I2S_Type *base, flexio_i2s_handle_t *handle); /*! * @brief Gets the remaining bytes to be sent. * * @param base Pointer to FLEXIO_I2S_Type structure. * @param handle Pointer to flexio_i2s_handle_t structure which stores the transfer state * @param count Bytes sent. * @retval kStatus_Success Succeed get the transfer count. * @retval kStatus_NoTransferInProgress There is not a non-blocking transaction currently in progress. */ status_t FLEXIO_I2S_TransferGetSendCount(FLEXIO_I2S_Type *base, flexio_i2s_handle_t *handle, size_t *count); /*! * @brief Gets the remaining bytes to be received. * * @param base Pointer to FLEXIO_I2S_Type structure. * @param handle Pointer to flexio_i2s_handle_t structure which stores the transfer state * @return count Bytes received. * @retval kStatus_Success Succeed get the transfer count. * @retval kStatus_NoTransferInProgress There is not a non-blocking transaction currently in progress. */ status_t FLEXIO_I2S_TransferGetReceiveCount(FLEXIO_I2S_Type *base, flexio_i2s_handle_t *handle, size_t *count); /*! * @brief Tx interrupt handler. * * @param i2sBase Pointer to FLEXIO_I2S_Type structure. * @param i2sHandle Pointer to flexio_i2s_handle_t structure */ void FLEXIO_I2S_TransferTxHandleIRQ(void *i2sBase, void *i2sHandle); /*! * @brief Rx interrupt handler. * * @param i2sBase Pointer to FLEXIO_I2S_Type structure. * @param i2sHandle Pointer to flexio_i2s_handle_t structure. */ void FLEXIO_I2S_TransferRxHandleIRQ(void *i2sBase, void *i2sHandle); /*! @} */ #if defined(__cplusplus) } #endif /*_cplusplus*/ /*! @} */ #endif /* _FSL_FLEXIO_I2S_H_ */