lpc17xx_i2s.c

/**********************************************************************
* $Id$      lpc17xx_i2s.c               2010-09-23
*//**
* @file     lpc17xx_gpio.c
* @brief    Contains all functions support for I2S firmware
*           library on LPC17xx
* @version  3.1
* @date     23. Sep. 2010
* @author   NXP MCU SW Application Team
*
* Copyright(C) 2010, NXP Semiconductor
* All rights reserved.
*
***********************************************************************
* Software that is described herein is for illustrative purposes only
* which provides customers with programming information regarding the
* products. This software is supplied "AS IS" without any warranties.
* NXP Semiconductors assumes no responsibility or liability for the
* use of the software, conveys no license or title under any patent,
* copyright, or mask work right to the product. NXP Semiconductors
* reserves the right to make changes in the software without
* notification. NXP Semiconductors also make no representation or
* warranty that such application will be suitable for the specified
* use without further testing or modification.
**********************************************************************/

/* Peripheral group ----------------------------------------------------------- */
/** @addtogroup I2S
 * @{
 */

/* Includes ------------------------------------------------------------------- */
#include "lpc17xx_i2s.h"
#include "lpc17xx_clkpwr.h"


/* If this source file built with example, the LPC17xx FW library configuration
 * file in each example directory ("lpc17xx_libcfg.h") must be included,
 * otherwise the default FW library configuration file must be included instead
 */
#ifdef __BUILD_WITH_EXAMPLE__
#include "lpc17xx_libcfg.h"
#else
#include "lpc17xx_libcfg_default.h"
#endif /* __BUILD_WITH_EXAMPLE__ */


#ifdef _I2S

/* Private Functions ---------------------------------------------------------- */

static uint8_t i2s_GetWordWidth(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode);
static uint8_t i2s_GetChannel(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode);

/********************************************************************//**
 * @brief       Get I2S wordwidth value
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   TRMode is the I2S mode, should be:
 *              - I2S_TX_MODE = 0: transmit mode
 *              - I2S_RX_MODE = 1: receive mode
 * @return      The wordwidth value, should be: 8,16 or 32
 *********************************************************************/
static uint8_t i2s_GetWordWidth(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
    uint8_t value;

    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    CHECK_PARAM(PARAM_I2S_TRX(TRMode));

    if (TRMode == I2S_TX_MODE) {
        value = (I2Sx->I2SDAO) & 0x03; /* get wordwidth bit */
    } else {
        value = (I2Sx->I2SDAI) & 0x03; /* get wordwidth bit */
    }
    switch (value) {
    case I2S_WORDWIDTH_8:
        return 8;
    case I2S_WORDWIDTH_16:
        return 16;
    default:
        return 32;
    }
}

/********************************************************************//**
 * @brief       Get I2S channel value
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   TRMode is the I2S mode, should be:
 *              - I2S_TX_MODE = 0: transmit mode
 *              - I2S_RX_MODE = 1: receive mode
 * @return      The channel value, should be: 1(mono) or 2(stereo)
 *********************************************************************/
static uint8_t i2s_GetChannel(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
    uint8_t value;

    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    CHECK_PARAM(PARAM_I2S_TRX(TRMode));

    if (TRMode == I2S_TX_MODE) {
        value = ((I2Sx->I2SDAO) & 0x04)>>2; /* get bit[2] */
    } else {
        value = ((I2Sx->I2SDAI) & 0x04)>>2; /* get bit[2] */
    }
        if(value == I2S_MONO) return 1;
          return 2;
}

/* End of Private Functions --------------------------------------------------- */


/* Public Functions ----------------------------------------------------------- */
/** @addtogroup I2S_Public_Functions
 * @{
 */

/********************************************************************//**
 * @brief       Initialize I2S
 *                  - Turn on power and clock
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @return      none
 *********************************************************************/
void I2S_Init(LPC_I2S_TypeDef *I2Sx) {
    CHECK_PARAM(PARAM_I2Sx(I2Sx));

    // Turn on power and clock
    CLKPWR_ConfigPPWR(CLKPWR_PCONP_PCI2S, ENABLE);
    LPC_I2S->I2SDAI = LPC_I2S->I2SDAO = 0x00;
}

/********************************************************************//**
 * @brief       Configuration I2S, setting:
 *                  - master/slave mode
 *                  - wordwidth value
 *                  - channel mode
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   TRMode transmit/receive mode, should be:
 *                  - I2S_TX_MODE = 0: transmit mode
 *                  - I2S_RX_MODE = 1: receive mode
 * @param[in]   ConfigStruct pointer to I2S_CFG_Type structure
 *              which will be initialized.
 * @return      none
 *********************************************************************/
void I2S_Config(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode, I2S_CFG_Type* ConfigStruct)
{
    uint32_t bps, config;

    CHECK_PARAM(PARAM_I2Sx(I2Sx));

    CHECK_PARAM(PARAM_I2S_WORDWIDTH(ConfigStruct->wordwidth));
    CHECK_PARAM(PARAM_I2S_CHANNEL(ConfigStruct->mono));
    CHECK_PARAM(PARAM_I2S_STOP(ConfigStruct->stop));
    CHECK_PARAM(PARAM_I2S_RESET(ConfigStruct->reset));
    CHECK_PARAM(PARAM_I2S_WS_SEL(ConfigStruct->ws_sel));
    CHECK_PARAM(PARAM_I2S_MUTE(ConfigStruct->mute));

    /* Setup clock */
    bps = (ConfigStruct->wordwidth +1)*8;

    /* Calculate audio config */
    config = (bps - 1)<<6 | (ConfigStruct->ws_sel)<<5 | (ConfigStruct->reset)<<4 |
        (ConfigStruct->stop)<<3 | (ConfigStruct->mono)<<2 | (ConfigStruct->wordwidth);

    if(TRMode == I2S_RX_MODE){
        LPC_I2S->I2SDAI = config;
    }else{
        LPC_I2S->I2SDAO = config;
    }
}

/********************************************************************//**
 * @brief       DeInitial both I2S transmit or receive
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @return      none
 *********************************************************************/
void I2S_DeInit(LPC_I2S_TypeDef *I2Sx) {
    CHECK_PARAM(PARAM_I2Sx(I2Sx));

    // Turn off power and clock
    CLKPWR_ConfigPPWR(CLKPWR_PCONP_PCI2S, DISABLE);
}

/********************************************************************//**
 * @brief       Get I2S Buffer Level
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   TRMode Transmit/receive mode, should be:
 *                  - I2S_TX_MODE = 0: transmit mode
 *                  - I2S_RX_MODE = 1: receive mode
 * @return      current level of Transmit/Receive Buffer
 *********************************************************************/
uint8_t I2S_GetLevel(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode)
{
    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    CHECK_PARAM(PARAM_I2S_TRX(TRMode));

    if(TRMode == I2S_TX_MODE)
    {
        return ((I2Sx->I2SSTATE >> 16) & 0xFF);
    }
    else
    {
        return ((I2Sx->I2SSTATE >> 8) & 0xFF);
    }
}

/********************************************************************//**
 * @brief       I2S Start: clear all STOP,RESET and MUTE bit, ready to operate
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @return      none
 *********************************************************************/
void I2S_Start(LPC_I2S_TypeDef *I2Sx)
{
    //Clear STOP,RESET and MUTE bit
    I2Sx->I2SDAO &= ~I2S_DAI_RESET;
    I2Sx->I2SDAI &= ~I2S_DAI_RESET;
    I2Sx->I2SDAO &= ~I2S_DAI_STOP;
    I2Sx->I2SDAI &= ~I2S_DAI_STOP;
    I2Sx->I2SDAO &= ~I2S_DAI_MUTE;
}

/********************************************************************//**
 * @brief       I2S Send data
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   BufferData pointer to uint32_t is the data will be send
 * @return      none
 *********************************************************************/
void I2S_Send(LPC_I2S_TypeDef *I2Sx, uint32_t BufferData) {
    CHECK_PARAM(PARAM_I2Sx(I2Sx));

    I2Sx->I2STXFIFO = BufferData;
}

/********************************************************************//**
 * @brief       I2S Receive Data
 * @param[in]   I2Sx pointer to LPC_I2S_TypeDef
 * @return      received value
 *********************************************************************/
uint32_t I2S_Receive(LPC_I2S_TypeDef* I2Sx) {
    CHECK_PARAM(PARAM_I2Sx(I2Sx));

    return (I2Sx->I2SRXFIFO);

}

/********************************************************************//**
 * @brief       I2S Pause
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   TRMode is transmit/receive mode, should be:
 *              - I2S_TX_MODE = 0: transmit mode
 *              - I2S_RX_MODE = 1: receive mode
 * @return      none
 *********************************************************************/
void I2S_Pause(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    CHECK_PARAM(PARAM_I2S_TRX(TRMode));

    if (TRMode == I2S_TX_MODE) //Transmit mode
    {
        I2Sx->I2SDAO |= I2S_DAO_STOP;
    } else //Receive mode
    {
        I2Sx->I2SDAI |= I2S_DAI_STOP;
    }
}

/********************************************************************//**
 * @brief       I2S Mute
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   TRMode is transmit/receive mode, should be:
 *              - I2S_TX_MODE = 0: transmit mode
 *              - I2S_RX_MODE = 1: receive mode
 * @return      none
 *********************************************************************/
void I2S_Mute(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    CHECK_PARAM(PARAM_I2S_TRX(TRMode));

    if (TRMode == I2S_TX_MODE) //Transmit mode
    {
        I2Sx->I2SDAO |= I2S_DAO_MUTE;
    } else //Receive mode
    {
        I2Sx->I2SDAI |= I2S_DAI_MUTE;
    }
}

/********************************************************************//**
 * @brief       I2S Stop
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   TRMode is transmit/receive mode, should be:
 *              - I2S_TX_MODE = 0: transmit mode
 *              - I2S_RX_MODE = 1: receive mode
 * @return      none
 *********************************************************************/
void I2S_Stop(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    CHECK_PARAM(PARAM_I2S_TRX(TRMode));

    if (TRMode == I2S_TX_MODE) //Transmit mode
    {
        I2Sx->I2SDAO &= ~I2S_DAO_MUTE;
        I2Sx->I2SDAO |= I2S_DAO_STOP;
        I2Sx->I2SDAO |= I2S_DAO_RESET;
    } else //Receive mode
    {
        I2Sx->I2SDAI |= I2S_DAI_STOP;
        I2Sx->I2SDAI |= I2S_DAI_RESET;
    }
}

/********************************************************************//**
 * @brief       Set frequency for I2S
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   Freq is the frequency for I2S will be set. It can range
 *              from 16-96 kHz(16, 22.05, 32, 44.1, 48, 96kHz)
 * @param[in]   TRMode is transmit/receive mode, should be:
 *              - I2S_TX_MODE = 0: transmit mode
 *              - I2S_RX_MODE = 1: receive mode
 * @return      Status: ERROR or SUCCESS
 *********************************************************************/
Status I2S_FreqConfig(LPC_I2S_TypeDef *I2Sx, uint32_t Freq, uint8_t TRMode) {

    uint32_t i2sMclk;
    uint8_t bitrate, channel, wordwidth;

    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    CHECK_PARAM(PRAM_I2S_FREQ(Freq));
    CHECK_PARAM(PARAM_I2S_TRX(TRMode));

    //set i2s reference is i2s_pclk/2 as default
    i2sMclk = CLKPWR_GetPCLK(CLKPWR_PCLKSEL_I2S)/2;
    I2Sx->I2STXRATE = 1  | (1<<8);
    I2Sx->I2SRXRATE = 1  | (1<<8);
    if(TRMode == I2S_TX_MODE)
    {
        channel = i2s_GetChannel(I2Sx,I2S_TX_MODE);
        wordwidth = i2s_GetWordWidth(I2Sx,I2S_TX_MODE);
    }
    else
    {
        channel = i2s_GetChannel(I2Sx,I2S_RX_MODE);
        wordwidth = i2s_GetWordWidth(I2Sx,I2S_RX_MODE);
    }
    bitrate = i2sMclk/(Freq * channel * wordwidth) - 1;
    if (TRMode == I2S_TX_MODE)// Transmitter
    {
        I2Sx->I2STXBITRATE = bitrate;
    } else //Receiver
    {
        I2Sx->I2SRXBITRATE = bitrate;
    }
    return SUCCESS;
}

/********************************************************************//**
 * @brief       I2S set bitrate
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   bitrate value will be set
 *              bitrate value should be in range: 0 .. 63
 * @param[in]   TRMode is transmit/receive mode, should be:
 *              - I2S_TX_MODE = 0: transmit mode
 *              - I2S_RX_MODE = 1: receive mode
 * @return      none
 *********************************************************************/
void I2S_SetBitRate(LPC_I2S_TypeDef *I2Sx, uint8_t bitrate, uint8_t TRMode)
{
    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    CHECK_PARAM(PARAM_I2S_BITRATE(bitrate));
    CHECK_PARAM(PARAM_I2S_TRX(TRMode));

    if(TRMode == I2S_TX_MODE)
    {
        I2Sx->I2STXBITRATE = bitrate;
    }
    else
    {
        I2Sx->I2SRXBITRATE = bitrate;
    }
}

/********************************************************************//**
 * @brief       Configuration operating mode for I2S
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   ModeConfig pointer to I2S_MODEConf_Type will be used to
 *              configure
 * @param[in]   TRMode is transmit/receive mode, should be:
 *              - I2S_TX_MODE = 0: transmit mode
 *              - I2S_RX_MODE = 1: receive mode
 * @return      none
 *********************************************************************/
void I2S_ModeConfig(LPC_I2S_TypeDef *I2Sx, I2S_MODEConf_Type* ModeConfig,
        uint8_t TRMode)
{
    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    CHECK_PARAM(PARAM_I2S_CLKSEL(ModeConfig->clksel));
    CHECK_PARAM(PARAM_I2S_4PIN(ModeConfig->fpin));
    CHECK_PARAM(PARAM_I2S_MCLK(ModeConfig->mcena));
    CHECK_PARAM(PARAM_I2S_TRX(TRMode));

    if (TRMode == I2S_TX_MODE) {
        I2Sx->I2STXMODE &= ~0x0F; //clear bit 3:0 in I2STXMODE register
        if (ModeConfig->clksel == I2S_CLKSEL_MCLK) {
            I2Sx->I2STXMODE |= 0x02;
        }
        if (ModeConfig->fpin == I2S_4PIN_ENABLE) {
            I2Sx->I2STXMODE |= (1 << 2);
        }
        if (ModeConfig->mcena == I2S_MCLK_ENABLE) {
            I2Sx->I2STXMODE |= (1 << 3);
        }
    } else {
        I2Sx->I2SRXMODE &= ~0x0F; //clear bit 3:0 in I2STXMODE register
        if (ModeConfig->clksel == I2S_CLKSEL_MCLK) {
            I2Sx->I2SRXMODE |= 0x02;
        }
        if (ModeConfig->fpin == I2S_4PIN_ENABLE) {
            I2Sx->I2SRXMODE |= (1 << 2);
        }
        if (ModeConfig->mcena == I2S_MCLK_ENABLE) {
            I2Sx->I2SRXMODE |= (1 << 3);
        }
    }
}

/********************************************************************//**
 * @brief       Configure DMA operation for I2S
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   DMAConfig pointer to I2S_DMAConf_Type will be used to configure
 * @param[in]   TRMode is transmit/receive mode, should be:
 *              - I2S_TX_MODE = 0: transmit mode
 *              - I2S_RX_MODE = 1: receive mode
 * @return      none
 *********************************************************************/
void I2S_DMAConfig(LPC_I2S_TypeDef *I2Sx, I2S_DMAConf_Type* DMAConfig,
        uint8_t TRMode)
{
    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    CHECK_PARAM(PARAM_I2S_DMA(DMAConfig->DMAIndex));
    CHECK_PARAM(PARAM_I2S_DMA_DEPTH(DMAConfig->depth));
    CHECK_PARAM(PARAM_I2S_TRX(TRMode));

    if (TRMode == I2S_RX_MODE) {
        if (DMAConfig->DMAIndex == I2S_DMA_1) {
            LPC_I2S->I2SDMA1 = (DMAConfig->depth) << 8;
        } else {
            LPC_I2S->I2SDMA2 = (DMAConfig->depth) << 8;
        }
    } else {
        if (DMAConfig->DMAIndex == I2S_DMA_1) {
            LPC_I2S->I2SDMA1 = (DMAConfig->depth) << 16;
        } else {
            LPC_I2S->I2SDMA2 = (DMAConfig->depth) << 16;
        }
    }
}

/********************************************************************//**
 * @brief       Enable/Disable DMA operation for I2S
 * @param[in]   I2Sx: I2S peripheral selected, should be: LPC_I2S
 * @param[in]   DMAIndex chose what DMA is used, should be:
 *              - I2S_DMA_1 = 0: DMA1
 *              - I2S_DMA_2 = 1: DMA2
 * @param[in]   TRMode is transmit/receive mode, should be:
 *              - I2S_TX_MODE = 0: transmit mode
 *              - I2S_RX_MODE = 1: receive mode
 * @param[in]   NewState is new state of DMA operation, should be:
 *              - ENABLE
 *              - DISABLE
 * @return      none
 *********************************************************************/
void I2S_DMACmd(LPC_I2S_TypeDef *I2Sx, uint8_t DMAIndex, uint8_t TRMode,
        FunctionalState NewState)
{
    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));
    CHECK_PARAM(PARAM_I2S_DMA(DMAIndex));
    CHECK_PARAM(PARAM_I2S_TRX(TRMode));

    if (TRMode == I2S_RX_MODE) {
        if (DMAIndex == I2S_DMA_1) {
            if (NewState == ENABLE)
                I2Sx->I2SDMA1 |= 0x01;
            else
                I2Sx->I2SDMA1 &= ~0x01;
        } else {
            if (NewState == ENABLE)
                I2Sx->I2SDMA2 |= 0x01;
            else
                I2Sx->I2SDMA2 &= ~0x01;
        }
    } else {
        if (DMAIndex == I2S_DMA_1) {
            if (NewState == ENABLE)
                I2Sx->I2SDMA1 |= 0x02;
            else
                I2Sx->I2SDMA1 &= ~0x02;
        } else {
            if (NewState == ENABLE)
                I2Sx->I2SDMA2 |= 0x02;
            else
                I2Sx->I2SDMA2 &= ~0x02;
        }
    }
}

/********************************************************************//**
 * @brief       Configure IRQ for I2S
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   TRMode is transmit/receive mode, should be:
 *              - I2S_TX_MODE = 0: transmit mode
 *              - I2S_RX_MODE = 1: receive mode
 * @param[in]   level is the FIFO level that triggers IRQ request
 * @return      none
 *********************************************************************/
void I2S_IRQConfig(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode, uint8_t level) {
    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    CHECK_PARAM(PARAM_I2S_TRX(TRMode));
    CHECK_PARAM(PARAM_I2S_IRQ_LEVEL(level));

    if (TRMode == I2S_RX_MODE) {
        I2Sx->I2SIRQ |= (level << 8);
    } else {
        I2Sx->I2SIRQ |= (level << 16);
    }
}

/********************************************************************//**
 * @brief       Enable/Disable IRQ for I2S
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   TRMode is transmit/receive mode, should be:
 *              - I2S_TX_MODE = 0: transmit mode
 *              - I2S_RX_MODE = 1: receive mode
 * @param[in]   NewState is new state of DMA operation, should be:
 *              - ENABLE
 *              - DISABLE
 * @return      none
 *********************************************************************/
void I2S_IRQCmd(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode, FunctionalState NewState) {
    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));

    if (TRMode == I2S_RX_MODE) {
        if (NewState == ENABLE)
            I2Sx->I2SIRQ |= 0x01;
        else
            I2Sx->I2SIRQ &= ~0x01;
        //Enable DMA

    } else {
        if (NewState == ENABLE)
            I2Sx->I2SIRQ |= 0x02;
        else
            I2Sx->I2SIRQ &= ~0x02;
    }
}

/********************************************************************//**
 * @brief       Get I2S interrupt status
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   TRMode is transmit/receive mode, should be:
 *              - I2S_TX_MODE = 0: transmit mode
 *              - I2S_RX_MODE = 1: receive mode
 * @return      FunctionState   should be:
 *              - ENABLE: interrupt is enable
 *              - DISABLE: interrupt is disable
 *********************************************************************/
FunctionalState I2S_GetIRQStatus(LPC_I2S_TypeDef *I2Sx,uint8_t TRMode)
{
    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    if(TRMode == I2S_TX_MODE)
        return ((FunctionalState)((I2Sx->I2SIRQ >> 1)&0x01));
    else
        return ((FunctionalState)((I2Sx->I2SIRQ)&0x01));
}

/********************************************************************//**
 * @brief       Get I2S interrupt depth
 * @param[in]   I2Sx I2S peripheral selected, should be: LPC_I2S
 * @param[in]   TRMode is transmit/receive mode, should be:
 *              - I2S_TX_MODE = 0: transmit mode
 *              - I2S_RX_MODE = 1: receive mode
 * @return      depth of FIFO level on which to create an irq request
 *********************************************************************/
uint8_t I2S_GetIRQDepth(LPC_I2S_TypeDef *I2Sx,uint8_t TRMode)
{
    CHECK_PARAM(PARAM_I2Sx(I2Sx));
    if(TRMode == I2S_TX_MODE)
        return (((I2Sx->I2SIRQ)>>16)&0xFF);
    else
        return (((I2Sx->I2SIRQ)>>8)&0xFF);
}
/**
 * @}
 */

#endif /* _I2S */

/**
 * @}
 */

/* --------------------------------- End Of File ------------------------------ */