Diff: libs/LPC17xx/LPC17xxLib/src/lpc17xx_i2s.c

Revision:

2:1df0b61d3b5a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libs/LPC17xx/LPC17xxLib/src/lpc17xx_i2s.c	Fri Feb 28 18:52:52 2014 -0800
@@ -0,0 +1,604 @@
+#ifdef __LPC17XX__
+
+/**********************************************************************
+* $Id$		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 ------------------------------ */
+
+#endif /* __LPC17XX__ */