DriverLibrary - NXP's driver library for LPC17xx, ported to mbed'…

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Igor Skochinsky / Mbed 2 deprecated DriverLibrary

NXP's driver library for LPC17xx, ported to mbed's online compiler. Not tested! I had to fix a lot of warings and found a couple of pretty obvious bugs, so the chances are there are more. Original: http://ics.nxp.com/support/documents/microcontrollers/zip/lpc17xx.cmsis.driver.library.zip

Dependencies: mbed

source/lpc17xx_i2s.c@0:1063a091a062, 2010-02-17 (annotated)

Committer:: igorsk
Date:: Wed Feb 17 16:22:39 2010 +0000
Revision:: 0:1063a091a062

Who changed what in which revision?

User	Revision	Line number	New contents of line
igorsk	0:1063a091a062	1	/**
igorsk	0:1063a091a062	2	* @file : lpc17xx_i2s.c
igorsk	0:1063a091a062	3	* @brief : Contains all functions support for I2S firmware library on LPC17xx
igorsk	0:1063a091a062	4	* @version : 1.0
igorsk	0:1063a091a062	5	* @date : 13. May. 2009
igorsk	0:1063a091a062	6	* @author : NguyenCao
igorsk	0:1063a091a062	7	**************************************************************************
igorsk	0:1063a091a062	8	* Software that is described herein is for illustrative purposes only
igorsk	0:1063a091a062	9	* which provides customers with programming information regarding the
igorsk	0:1063a091a062	10	* products. This software is supplied "AS IS" without any warranties.
igorsk	0:1063a091a062	11	* NXP Semiconductors assumes no responsibility or liability for the
igorsk	0:1063a091a062	12	* use of the software, conveys no license or title under any patent,
igorsk	0:1063a091a062	13	* copyright, or mask work right to the product. NXP Semiconductors
igorsk	0:1063a091a062	14	* reserves the right to make changes in the software without
igorsk	0:1063a091a062	15	* notification. NXP Semiconductors also make no representation or
igorsk	0:1063a091a062	16	* warranty that such application will be suitable for the specified
igorsk	0:1063a091a062	17	* use without further testing or modification.
igorsk	0:1063a091a062	18	**********************************************************************/
igorsk	0:1063a091a062	19
igorsk	0:1063a091a062	20	/* Peripheral group ----------------------------------------------------------- */
igorsk	0:1063a091a062	21	/** @addtogroup I2S
igorsk	0:1063a091a062	22	* @{
igorsk	0:1063a091a062	23	*/
igorsk	0:1063a091a062	24
igorsk	0:1063a091a062	25	/* Includes ------------------------------------------------------------------- */
igorsk	0:1063a091a062	26	#include "lpc17xx_i2s.h"
igorsk	0:1063a091a062	27	#include "lpc17xx_clkpwr.h"
igorsk	0:1063a091a062	28
igorsk	0:1063a091a062	29
igorsk	0:1063a091a062	30	/* If this source file built with example, the LPC17xx FW library configuration
igorsk	0:1063a091a062	31	* file in each example directory ("lpc17xx_libcfg.h") must be included,
igorsk	0:1063a091a062	32	* otherwise the default FW library configuration file must be included instead
igorsk	0:1063a091a062	33	*/
igorsk	0:1063a091a062	34	#ifdef __BUILD_WITH_EXAMPLE__
igorsk	0:1063a091a062	35	#include "lpc17xx_libcfg.h"
igorsk	0:1063a091a062	36	#else
igorsk	0:1063a091a062	37	#include "lpc17xx_libcfg_default.h"
igorsk	0:1063a091a062	38	#endif /* __BUILD_WITH_EXAMPLE__ */
igorsk	0:1063a091a062	39
igorsk	0:1063a091a062	40	#ifdef __cplusplus
igorsk	0:1063a091a062	41	extern "C"
igorsk	0:1063a091a062	42	{
igorsk	0:1063a091a062	43	#endif
igorsk	0:1063a091a062	44
igorsk	0:1063a091a062	45	#ifdef _I2S
igorsk	0:1063a091a062	46
igorsk	0:1063a091a062	47	/* Private Variables ---------------------------------------------------------- */
igorsk	0:1063a091a062	48	static fnI2SCbs_Type *_apfnI2SCbs[2] = {
igorsk	0:1063a091a062	49	NULL, // I2S transmit Call-back function pointer
igorsk	0:1063a091a062	50	NULL, // I2S receive Call-back function pointer
igorsk	0:1063a091a062	51	};
igorsk	0:1063a091a062	52
igorsk	0:1063a091a062	53
igorsk	0:1063a091a062	54	/* Private Functions ---------------------------------------------------------- */
igorsk	0:1063a091a062	55	/** @defgroup I2S_Private_Functions
igorsk	0:1063a091a062	56	* @{
igorsk	0:1063a091a062	57	*/
igorsk	0:1063a091a062	58
igorsk	0:1063a091a062	59	/******************************************************************//
igorsk	0:1063a091a062	60	* @brief Get I2S wordwidth value
igorsk	0:1063a091a062	61	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	62	* @param[in] TRMode is the I2S mode, should be:
igorsk	0:1063a091a062	63	* - I2S_TX_MODE: transmit mode
igorsk	0:1063a091a062	64	* - I2S_RX_MODE: receive mode
igorsk	0:1063a091a062	65	* @return The wordwidth value, should be: 8,16 or 32
igorsk	0:1063a091a062	66	*********************************************************************/
igorsk	0:1063a091a062	67	uint8_t I2S_GetWordWidth(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
igorsk	0:1063a091a062	68	uint8_t value;
igorsk	0:1063a091a062	69
igorsk	0:1063a091a062	70	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	71	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
igorsk	0:1063a091a062	72
igorsk	0:1063a091a062	73	if (TRMode == I2S_TX_MODE) {
igorsk	0:1063a091a062	74	value = (I2Sx->I2SDAO) & 0x03; /* get wordwidth bit */
igorsk	0:1063a091a062	75	} else {
igorsk	0:1063a091a062	76	value = (I2Sx->I2SDAI) & 0x03; /* get wordwidth bit */
igorsk	0:1063a091a062	77	}
igorsk	0:1063a091a062	78	switch (value) {
igorsk	0:1063a091a062	79	case I2S_WORDWIDTH_8:
igorsk	0:1063a091a062	80	return 8;
igorsk	0:1063a091a062	81	case I2S_WORDWIDTH_16:
igorsk	0:1063a091a062	82	return 16;
igorsk	0:1063a091a062	83	default:
igorsk	0:1063a091a062	84	return 32;
igorsk	0:1063a091a062	85	}
igorsk	0:1063a091a062	86	}
igorsk	0:1063a091a062	87	/******************************************************************//
igorsk	0:1063a091a062	88	* @brief Get I2S channel value
igorsk	0:1063a091a062	89	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	90	* @param[in] TRMode is the I2S mode, should be:
igorsk	0:1063a091a062	91	* - I2S_TX_MODE: transmit mode
igorsk	0:1063a091a062	92	* - I2S_RX_MODE: receive mode
igorsk	0:1063a091a062	93	* @return The channel value, should be: 1(mono) or 2(stereo)
igorsk	0:1063a091a062	94	*********************************************************************/
igorsk	0:1063a091a062	95	uint8_t I2S_GetChannel(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
igorsk	0:1063a091a062	96	uint8_t value;
igorsk	0:1063a091a062	97
igorsk	0:1063a091a062	98	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	99	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
igorsk	0:1063a091a062	100
igorsk	0:1063a091a062	101	if (TRMode == I2S_TX_MODE) {
igorsk	0:1063a091a062	102	value = (I2Sx->I2SDAO) & 0x04; /* get bit[2] */
igorsk	0:1063a091a062	103	} else {
igorsk	0:1063a091a062	104	value = (I2Sx->I2SDAI) & 0x04; /* get bit[2] */
igorsk	0:1063a091a062	105	}
igorsk	0:1063a091a062	106	switch (value) {
igorsk	0:1063a091a062	107	case I2S_MONO:
igorsk	0:1063a091a062	108	return 1;
igorsk	0:1063a091a062	109	default:
igorsk	0:1063a091a062	110	return 2;
igorsk	0:1063a091a062	111	}
igorsk	0:1063a091a062	112	}
igorsk	0:1063a091a062	113
igorsk	0:1063a091a062	114	/**
igorsk	0:1063a091a062	115	* @}
igorsk	0:1063a091a062	116	*/
igorsk	0:1063a091a062	117
igorsk	0:1063a091a062	118
igorsk	0:1063a091a062	119	/* Public Functions ----------------------------------------------------------- */
igorsk	0:1063a091a062	120	/** @addtogroup I2S_Public_Functions
igorsk	0:1063a091a062	121	* @{
igorsk	0:1063a091a062	122	*/
igorsk	0:1063a091a062	123
igorsk	0:1063a091a062	124	/******************************************************************//
igorsk	0:1063a091a062	125	* @brief Initialize I2S
igorsk	0:1063a091a062	126	* - Turn on power and clock
igorsk	0:1063a091a062	127	* - Setup I2S pin select
igorsk	0:1063a091a062	128	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	129	* @return none
igorsk	0:1063a091a062	130	*********************************************************************/
igorsk	0:1063a091a062	131	void I2S_Init(LPC_I2S_TypeDef *I2Sx) {
igorsk	0:1063a091a062	132	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	133
igorsk	0:1063a091a062	134	// Turn on power and clock
igorsk	0:1063a091a062	135	CLKPWR_ConfigPPWR(CLKPWR_PCONP_PCI2S, ENABLE);
igorsk	0:1063a091a062	136	LPC_I2S->I2SDAI = LPC_I2S->I2SDAO = 0x00;
igorsk	0:1063a091a062	137	}
igorsk	0:1063a091a062	138
igorsk	0:1063a091a062	139	/******************************************************************//
igorsk	0:1063a091a062	140	* @brief Configuration I2S, setting:
igorsk	0:1063a091a062	141	* - master/slave mode
igorsk	0:1063a091a062	142	* - wordwidth value
igorsk	0:1063a091a062	143	* - channel mode
igorsk	0:1063a091a062	144	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	145	* @param[in] TRMode: transmit/receive mode, should be:
igorsk	0:1063a091a062	146	* - I2S_TX_MODE: transmit mode
igorsk	0:1063a091a062	147	* - I2S_RX_MODE: receive mode
igorsk	0:1063a091a062	148	* @param[in] ConfigStruct pointer to I2S_CFG_Type structure
igorsk	0:1063a091a062	149	* which will be initialized.
igorsk	0:1063a091a062	150	* @return none
igorsk	0:1063a091a062	151	*********************************************************************/
igorsk	0:1063a091a062	152	void I2S_Config(LPC_I2S_TypeDef I2Sx, uint8_t TRMode, I2S_CFG_Type ConfigStruct)
igorsk	0:1063a091a062	153	{
igorsk	0:1063a091a062	154	uint32_t bps, config;
igorsk	0:1063a091a062	155
igorsk	0:1063a091a062	156	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	157
igorsk	0:1063a091a062	158	CHECK_PARAM(PARAM_I2S_WORDWIDTH(ConfigStruct->wordwidth));
igorsk	0:1063a091a062	159	CHECK_PARAM(PARAM_I2S_CHANNEL(ConfigStruct->mono));
igorsk	0:1063a091a062	160	CHECK_PARAM(PARAM_I2S_STOP(ConfigStruct->stop));
igorsk	0:1063a091a062	161	CHECK_PARAM(PARAM_I2S_RESET(ConfigStruct->reset));
igorsk	0:1063a091a062	162	CHECK_PARAM(PARAM_I2S_WS_SEL(ConfigStruct->ws_sel));
igorsk	0:1063a091a062	163	CHECK_PARAM(PARAM_I2S_MUTE(ConfigStruct->mute));
igorsk	0:1063a091a062	164
igorsk	0:1063a091a062	165	/* Setup clock */
igorsk	0:1063a091a062	166	bps = (ConfigStruct->wordwidth +1)*8;
igorsk	0:1063a091a062	167
igorsk	0:1063a091a062	168	/* Calculate audio config */
igorsk	0:1063a091a062	169	config = (bps - 1)<<6 \| (ConfigStruct->ws_sel)<<5 \| (ConfigStruct->reset)<<4 \|
igorsk	0:1063a091a062	170	(ConfigStruct->stop)<<3 \| (ConfigStruct->mono)<<2 \| (ConfigStruct->wordwidth);
igorsk	0:1063a091a062	171
igorsk	0:1063a091a062	172	if(TRMode == I2S_RX_MODE){
igorsk	0:1063a091a062	173	LPC_I2S->I2SDAI = config;
igorsk	0:1063a091a062	174	}else{
igorsk	0:1063a091a062	175	LPC_I2S->I2SDAO = config;
igorsk	0:1063a091a062	176	}
igorsk	0:1063a091a062	177	}
igorsk	0:1063a091a062	178
igorsk	0:1063a091a062	179	/******************************************************************//
igorsk	0:1063a091a062	180	* @brief DeInitial both I2S transmit or receive
igorsk	0:1063a091a062	181	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	182	* @return none
igorsk	0:1063a091a062	183	*********************************************************************/
igorsk	0:1063a091a062	184	void I2S_DeInit(LPC_I2S_TypeDef *I2Sx) {
igorsk	0:1063a091a062	185	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	186
igorsk	0:1063a091a062	187	// Turn off power and clock
igorsk	0:1063a091a062	188	CLKPWR_ConfigPPWR(CLKPWR_PCONP_PCI2S, DISABLE);
igorsk	0:1063a091a062	189	}
igorsk	0:1063a091a062	190
igorsk	0:1063a091a062	191	/******************************************************************//
igorsk	0:1063a091a062	192	* @brief Get I2S Buffer Level
igorsk	0:1063a091a062	193	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	194	* @param[in] TRMode: Transmit/receive mode, should be:
igorsk	0:1063a091a062	195	* - I2S_TX_MODE: transmit mode
igorsk	0:1063a091a062	196	* - I2S_RX_MODE: receive mode
igorsk	0:1063a091a062	197	* @return current level of Transmit/Receive Buffer
igorsk	0:1063a091a062	198	*********************************************************************/
igorsk	0:1063a091a062	199	uint8_t I2S_GetLevel(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode)
igorsk	0:1063a091a062	200	{
igorsk	0:1063a091a062	201	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	202	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
igorsk	0:1063a091a062	203
igorsk	0:1063a091a062	204	if(TRMode == I2S_TX_MODE)
igorsk	0:1063a091a062	205	{
igorsk	0:1063a091a062	206	return ((I2Sx->I2SSTATE >> 16) & 0xFF);
igorsk	0:1063a091a062	207	}
igorsk	0:1063a091a062	208	else
igorsk	0:1063a091a062	209	{
igorsk	0:1063a091a062	210	return ((I2Sx->I2SSTATE >> 8) & 0xFF);
igorsk	0:1063a091a062	211	}
igorsk	0:1063a091a062	212	}
igorsk	0:1063a091a062	213	/******************************************************************//
igorsk	0:1063a091a062	214	* @brief I2S Start: clear all STOP,RESET and MUTE bit, ready to operate
igorsk	0:1063a091a062	215	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	216	* @return none
igorsk	0:1063a091a062	217	*********************************************************************/
igorsk	0:1063a091a062	218	void I2S_Start(LPC_I2S_TypeDef *I2Sx)
igorsk	0:1063a091a062	219	{
igorsk	0:1063a091a062	220	//Clear STOP,RESET and MUTE bit
igorsk	0:1063a091a062	221	I2Sx->I2SDAO &= ~I2S_DAI_RESET;
igorsk	0:1063a091a062	222	I2Sx->I2SDAI &= ~I2S_DAI_RESET;
igorsk	0:1063a091a062	223	I2Sx->I2SDAO &= ~I2S_DAI_STOP;
igorsk	0:1063a091a062	224	I2Sx->I2SDAI &= ~I2S_DAI_STOP;
igorsk	0:1063a091a062	225	I2Sx->I2SDAO &= ~I2S_DAI_MUTE;
igorsk	0:1063a091a062	226	}
igorsk	0:1063a091a062	227	/******************************************************************//
igorsk	0:1063a091a062	228	* @brief I2S Send data
igorsk	0:1063a091a062	229	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	230	* @param[in] BufferData pointer to uint32_t is the data will be send
igorsk	0:1063a091a062	231	* @return none
igorsk	0:1063a091a062	232	*********************************************************************/
igorsk	0:1063a091a062	233	void I2S_Send(LPC_I2S_TypeDef *I2Sx, uint32_t BufferData) {
igorsk	0:1063a091a062	234	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	235	CHECK_PARAM(PARAM_I2S_DATA(BufferData));
igorsk	0:1063a091a062	236
igorsk	0:1063a091a062	237	I2Sx->I2STXFIFO = BufferData;
igorsk	0:1063a091a062	238	}
igorsk	0:1063a091a062	239
igorsk	0:1063a091a062	240	/******************************************************************//
igorsk	0:1063a091a062	241	* @brief I2S Receive Data
igorsk	0:1063a091a062	242	* @param[in] I2Sx pointer to LPC_I2S_TypeDef
igorsk	0:1063a091a062	243	* @return received value
igorsk	0:1063a091a062	244	*********************************************************************/
igorsk	0:1063a091a062	245	uint32_t I2S_Receive(LPC_I2S_TypeDef* I2Sx) {
igorsk	0:1063a091a062	246	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	247
igorsk	0:1063a091a062	248	return (I2Sx->I2SRXFIFO);
igorsk	0:1063a091a062	249
igorsk	0:1063a091a062	250	}
igorsk	0:1063a091a062	251	/******************************************************************//
igorsk	0:1063a091a062	252	* @brief I2S Pause
igorsk	0:1063a091a062	253	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	254	* @param[in] TRMode is transmit/receive mode, should be:
igorsk	0:1063a091a062	255	* - I2S_TX_MODE: transmit mode
igorsk	0:1063a091a062	256	* - I2S_RX_MODE: receive mode
igorsk	0:1063a091a062	257	* @return none
igorsk	0:1063a091a062	258	*********************************************************************/
igorsk	0:1063a091a062	259	void I2S_Pause(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
igorsk	0:1063a091a062	260	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	261	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
igorsk	0:1063a091a062	262
igorsk	0:1063a091a062	263	if (TRMode == I2S_TX_MODE) //Transmit mode
igorsk	0:1063a091a062	264	{
igorsk	0:1063a091a062	265	I2Sx->I2SDAO \|= I2S_DAO_STOP;
igorsk	0:1063a091a062	266	} else //Receive mode
igorsk	0:1063a091a062	267	{
igorsk	0:1063a091a062	268	I2Sx->I2SDAI \|= I2S_DAI_STOP;
igorsk	0:1063a091a062	269	}
igorsk	0:1063a091a062	270	}
igorsk	0:1063a091a062	271	/******************************************************************//
igorsk	0:1063a091a062	272	* @brief I2S Mute
igorsk	0:1063a091a062	273	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	274	* @param[in] TRMode is transmit/receive mode, should be:
igorsk	0:1063a091a062	275	* - I2S_TX_MODE: transmit mode
igorsk	0:1063a091a062	276	* - I2S_RX_MODE: receive mode
igorsk	0:1063a091a062	277	* @return none
igorsk	0:1063a091a062	278	*********************************************************************/
igorsk	0:1063a091a062	279	void I2S_Mute(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
igorsk	0:1063a091a062	280	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	281	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
igorsk	0:1063a091a062	282
igorsk	0:1063a091a062	283	if (TRMode == I2S_TX_MODE) //Transmit mode
igorsk	0:1063a091a062	284	{
igorsk	0:1063a091a062	285	I2Sx->I2SDAO \|= I2S_DAO_MUTE;
igorsk	0:1063a091a062	286	} else //Receive mode
igorsk	0:1063a091a062	287	{
igorsk	0:1063a091a062	288	I2Sx->I2SDAI \|= I2S_DAI_MUTE;
igorsk	0:1063a091a062	289	}
igorsk	0:1063a091a062	290	}
igorsk	0:1063a091a062	291
igorsk	0:1063a091a062	292	/******************************************************************//
igorsk	0:1063a091a062	293	* @brief I2S Stop
igorsk	0:1063a091a062	294	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	295	* @param[in] TRMode is transmit/receive mode, should be:
igorsk	0:1063a091a062	296	* - I2S_TX_MODE: transmit mode
igorsk	0:1063a091a062	297	* - I2S_RX_MODE: receive mode
igorsk	0:1063a091a062	298	* @return none
igorsk	0:1063a091a062	299	*********************************************************************/
igorsk	0:1063a091a062	300	void I2S_Stop(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
igorsk	0:1063a091a062	301	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	302	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
igorsk	0:1063a091a062	303
igorsk	0:1063a091a062	304	if (TRMode == I2S_TX_MODE) //Transmit mode
igorsk	0:1063a091a062	305	{
igorsk	0:1063a091a062	306	I2Sx->I2SDAO &= ~I2S_DAO_MUTE;
igorsk	0:1063a091a062	307	I2Sx->I2SDAO \|= I2S_DAO_STOP;
igorsk	0:1063a091a062	308	I2Sx->I2SDAO \|= I2S_DAO_RESET;
igorsk	0:1063a091a062	309	} else //Receive mode
igorsk	0:1063a091a062	310	{
igorsk	0:1063a091a062	311	I2Sx->I2SDAI \|= I2S_DAI_STOP;
igorsk	0:1063a091a062	312	I2Sx->I2SDAI \|= I2S_DAI_RESET;
igorsk	0:1063a091a062	313	}
igorsk	0:1063a091a062	314	}
igorsk	0:1063a091a062	315
igorsk	0:1063a091a062	316	/******************************************************************//
igorsk	0:1063a091a062	317	* @brief Set frequency for I2S
igorsk	0:1063a091a062	318	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	319	* @param[in] Freq is the frequency for I2S will be set. It can range
igorsk	0:1063a091a062	320	* from 16-96 kHz(16, 22.05, 32, 44.1, 48, 96kHz)
igorsk	0:1063a091a062	321	* @param[in] TRMode is transmit/receive mode, should be:
igorsk	0:1063a091a062	322	* - I2S_TX_MODE: transmit mode
igorsk	0:1063a091a062	323	* - I2S_RX_MODE: receive mode
igorsk	0:1063a091a062	324	* @return Status: ERROR or SUCCESS
igorsk	0:1063a091a062	325	*********************************************************************/
igorsk	0:1063a091a062	326	Status I2S_FreqConfig(LPC_I2S_TypeDef *I2Sx, uint32_t Freq, uint8_t TRMode) {
igorsk	0:1063a091a062	327
igorsk	0:1063a091a062	328	/* Calculate bit rate
igorsk	0:1063a091a062	329	* The formula is:
igorsk	0:1063a091a062	330	* bit_rate = channel*wordwidth - 1
igorsk	0:1063a091a062	331	* 48kHz sample rate for 16 bit stereo date requires
igorsk	0:1063a091a062	332	* a bit rate of 48000162=1536MHz (MCLK)
igorsk	0:1063a091a062	333	*/
igorsk	0:1063a091a062	334	uint32_t i2sPclk;
igorsk	0:1063a091a062	335	uint64_t divider;
igorsk	0:1063a091a062	336	uint8_t bitrate, channel, wordwidth;
igorsk	0:1063a091a062	337	uint32_t x, y;
igorsk	0:1063a091a062	338	uint16_t dif;
igorsk	0:1063a091a062	339	uint16_t error;
igorsk	0:1063a091a062	340	uint8_t x_divide, y_divide=0;
igorsk	0:1063a091a062	341	uint16_t ErrorOptimal = 0xFFFF;
igorsk	0:1063a091a062	342
igorsk	0:1063a091a062	343	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	344	CHECK_PARAM(PRAM_I2S_FREQ(Freq));
igorsk	0:1063a091a062	345	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
igorsk	0:1063a091a062	346
igorsk	0:1063a091a062	347	i2sPclk = CLKPWR_GetPCLK(CLKPWR_PCLKSEL_I2S);
igorsk	0:1063a091a062	348	if(TRMode == I2S_TX_MODE)
igorsk	0:1063a091a062	349	{
igorsk	0:1063a091a062	350	channel = I2S_GetChannel(I2Sx,I2S_TX_MODE);
igorsk	0:1063a091a062	351	wordwidth = I2S_GetWordWidth(I2Sx,I2S_TX_MODE);
igorsk	0:1063a091a062	352	}
igorsk	0:1063a091a062	353	else
igorsk	0:1063a091a062	354	{
igorsk	0:1063a091a062	355	channel = I2S_GetChannel(I2Sx,I2S_RX_MODE);
igorsk	0:1063a091a062	356	wordwidth = I2S_GetWordWidth(I2Sx,I2S_RX_MODE);
igorsk	0:1063a091a062	357	}
igorsk	0:1063a091a062	358	bitrate = channel * wordwidth - 1;
igorsk	0:1063a091a062	359	if (TRMode == I2S_TX_MODE)// Transmitter
igorsk	0:1063a091a062	360	{
igorsk	0:1063a091a062	361	I2Sx->I2STXBITRATE = bitrate;
igorsk	0:1063a091a062	362	} else //Receiver
igorsk	0:1063a091a062	363	{
igorsk	0:1063a091a062	364	I2Sx->I2SRXBITRATE = bitrate;
igorsk	0:1063a091a062	365	}
igorsk	0:1063a091a062	366	/* Calculate X and Y divider
igorsk	0:1063a091a062	367	* The MCLK rate for the I2S transmitter is determined by the value
igorsk	0:1063a091a062	368	* in the I2STXRATE/I2SRXRATE register. The required I2STXRATE/I2SRXRATE
igorsk	0:1063a091a062	369	* setting depends on the desired audio sample rate desired, the format
igorsk	0:1063a091a062	370	* (stereo/mono) used, and the data size.
igorsk	0:1063a091a062	371	* The formula is:
igorsk	0:1063a091a062	372	* I2S_MCLK = PCLK * (X/Y) / 2
igorsk	0:1063a091a062	373	* We have:
igorsk	0:1063a091a062	374	* I2S_MCLK = Freq * bit_rate;
igorsk	0:1063a091a062	375	* So: (X/Y) = (Freq * bit_rate)/PCLK*2
igorsk	0:1063a091a062	376	* We use a loop function to chose the most suitable X,Y value
igorsk	0:1063a091a062	377	*/
igorsk	0:1063a091a062	378
igorsk	0:1063a091a062	379	divider = ((uint64_t)(Freq ( bitrate+1) 2)<<16) / i2sPclk;
igorsk	0:1063a091a062	380	for (y = 255; y > 0; y--) {
igorsk	0:1063a091a062	381	x = y * divider;
igorsk	0:1063a091a062	382	dif = x & 0xFFFF;
igorsk	0:1063a091a062	383	if(dif>0x8000) error = 0x10000-dif;
igorsk	0:1063a091a062	384	else error = dif;
igorsk	0:1063a091a062	385	if (error == 0)
igorsk	0:1063a091a062	386	{
igorsk	0:1063a091a062	387	y_divide = y;
igorsk	0:1063a091a062	388	break;
igorsk	0:1063a091a062	389	}
igorsk	0:1063a091a062	390	else if (error < ErrorOptimal)
igorsk	0:1063a091a062	391	{
igorsk	0:1063a091a062	392	ErrorOptimal = error;
igorsk	0:1063a091a062	393	y_divide = y;
igorsk	0:1063a091a062	394	}
igorsk	0:1063a091a062	395	}
igorsk	0:1063a091a062	396	x_divide = (y_divide * Freq ( bitrate+1) 2)/i2sPclk;
igorsk	0:1063a091a062	397	if (TRMode == I2S_TX_MODE)// Transmitter
igorsk	0:1063a091a062	398	{
igorsk	0:1063a091a062	399	I2Sx->I2STXRATE = y_divide \| (x_divide << 8);
igorsk	0:1063a091a062	400	} else //Receiver
igorsk	0:1063a091a062	401	{
igorsk	0:1063a091a062	402	I2Sx->I2SRXRATE = y_divide \| (x_divide << 8);
igorsk	0:1063a091a062	403	}
igorsk	0:1063a091a062	404	return SUCCESS;
igorsk	0:1063a091a062	405	}
igorsk	0:1063a091a062	406	/******************************************************************//
igorsk	0:1063a091a062	407	* @brief I2S set bitrate
igorsk	0:1063a091a062	408	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	409	* @param[in] bitrate value will be set
igorsk	0:1063a091a062	410	* @param[in] TRMode is transmit/receive mode, should be:
igorsk	0:1063a091a062	411	* - I2S_TX_MODE: transmit mode
igorsk	0:1063a091a062	412	* - I2S_RX_MODE: receive mode
igorsk	0:1063a091a062	413	* @return none
igorsk	0:1063a091a062	414	*********************************************************************/
igorsk	0:1063a091a062	415	void I2S_SetBitRate(LPC_I2S_TypeDef *I2Sx, uint8_t bitrate, uint8_t TRMode)
igorsk	0:1063a091a062	416	{
igorsk	0:1063a091a062	417	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	418	CHECK_PARAM(PARAM_I2S_BITRATE(bitrate));
igorsk	0:1063a091a062	419	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
igorsk	0:1063a091a062	420
igorsk	0:1063a091a062	421	if(TRMode == I2S_TX_MODE)
igorsk	0:1063a091a062	422	{
igorsk	0:1063a091a062	423	I2Sx->I2STXBITRATE = (bitrate -1);
igorsk	0:1063a091a062	424	}
igorsk	0:1063a091a062	425	else
igorsk	0:1063a091a062	426	{
igorsk	0:1063a091a062	427	I2Sx->I2SRXBITRATE = (bitrate -1);
igorsk	0:1063a091a062	428	}
igorsk	0:1063a091a062	429	}
igorsk	0:1063a091a062	430	/******************************************************************//
igorsk	0:1063a091a062	431	* @brief Configuration operating mode for I2S
igorsk	0:1063a091a062	432	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	433	* @param[in] ModeConfig pointer to I2S_MODEConf_Type will be used to
igorsk	0:1063a091a062	434	* configure, should be:
igorsk	0:1063a091a062	435	* @param[in] TRMode is transmit/receive mode, should be:
igorsk	0:1063a091a062	436	* - I2S_TX_MODE: transmit mode
igorsk	0:1063a091a062	437	* - I2S_RX_MODE: receive mode
igorsk	0:1063a091a062	438	* @return none
igorsk	0:1063a091a062	439	*********************************************************************/
igorsk	0:1063a091a062	440	void I2S_ModeConfig(LPC_I2S_TypeDef I2Sx, I2S_MODEConf_Type ModeConfig,
igorsk	0:1063a091a062	441	uint8_t TRMode)
igorsk	0:1063a091a062	442	{
igorsk	0:1063a091a062	443	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	444	CHECK_PARAM(PARAM_I2S_CLKSEL(ModeConfig->clksel));
igorsk	0:1063a091a062	445	CHECK_PARAM(PARAM_I2S_4PIN(ModeConfig->fpin));
igorsk	0:1063a091a062	446	CHECK_PARAM(PARAM_I2S_MCLK(ModeConfig->mcena));
igorsk	0:1063a091a062	447	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
igorsk	0:1063a091a062	448
igorsk	0:1063a091a062	449	if (TRMode == I2S_TX_MODE) {
igorsk	0:1063a091a062	450	I2Sx->I2STXMODE &= ~0x0F; //clear bit 3:0 in I2STXMODE register
igorsk	0:1063a091a062	451	if (ModeConfig->clksel == I2S_CLKSEL_1) {
igorsk	0:1063a091a062	452	I2Sx->I2STXMODE \|= 0x02;
igorsk	0:1063a091a062	453	}
igorsk	0:1063a091a062	454	if (ModeConfig->fpin == I2S_4PIN_ENABLE) {
igorsk	0:1063a091a062	455	I2Sx->I2STXMODE \|= (1 << 2);
igorsk	0:1063a091a062	456	}
igorsk	0:1063a091a062	457	if (ModeConfig->mcena == I2S_MCLK_ENABLE) {
igorsk	0:1063a091a062	458	I2Sx->I2STXMODE \|= (1 << 3);
igorsk	0:1063a091a062	459	}
igorsk	0:1063a091a062	460	} else {
igorsk	0:1063a091a062	461	I2Sx->I2SRXMODE &= ~0x0F; //clear bit 3:0 in I2STXMODE register
igorsk	0:1063a091a062	462	if (ModeConfig->clksel == I2S_CLKSEL_1) {
igorsk	0:1063a091a062	463	I2Sx->I2SRXMODE \|= 0x02;
igorsk	0:1063a091a062	464	}
igorsk	0:1063a091a062	465	if (ModeConfig->fpin == I2S_4PIN_ENABLE) {
igorsk	0:1063a091a062	466	I2Sx->I2SRXMODE \|= (1 << 2);
igorsk	0:1063a091a062	467	}
igorsk	0:1063a091a062	468	if (ModeConfig->mcena == I2S_MCLK_ENABLE) {
igorsk	0:1063a091a062	469	I2Sx->I2SRXMODE \|= (1 << 3);
igorsk	0:1063a091a062	470	}
igorsk	0:1063a091a062	471	}
igorsk	0:1063a091a062	472	}
igorsk	0:1063a091a062	473
igorsk	0:1063a091a062	474	/******************************************************************//
igorsk	0:1063a091a062	475	* @brief Configure DMA operation for I2S
igorsk	0:1063a091a062	476	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	477	* @param[in] DMAConfig pointer to I2S_DMAConf_Type will be used to configure
igorsk	0:1063a091a062	478	* @param[in] TRMode is transmit/receive mode, should be:
igorsk	0:1063a091a062	479	* - I2S_TX_MODE: transmit mode
igorsk	0:1063a091a062	480	* - I2S_RX_MODE: receive mode
igorsk	0:1063a091a062	481	* @return none
igorsk	0:1063a091a062	482	*********************************************************************/
igorsk	0:1063a091a062	483	void I2S_DMAConfig(LPC_I2S_TypeDef I2Sx, I2S_DMAConf_Type DMAConfig,
igorsk	0:1063a091a062	484	uint8_t TRMode)
igorsk	0:1063a091a062	485	{
igorsk	0:1063a091a062	486	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	487	CHECK_PARAM(PARAM_I2S_DMA(DMAConfig->DMAIndex));
igorsk	0:1063a091a062	488	CHECK_PARAM(PARAM_I2S_DMA_DEPTH(DMAConfig->depth));
igorsk	0:1063a091a062	489	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
igorsk	0:1063a091a062	490
igorsk	0:1063a091a062	491	if (TRMode == I2S_RX_MODE) {
igorsk	0:1063a091a062	492	if (DMAConfig->DMAIndex == I2S_DMA_1) {
igorsk	0:1063a091a062	493	LPC_I2S->I2SDMA1 = (DMAConfig->depth) << 8;
igorsk	0:1063a091a062	494	} else {
igorsk	0:1063a091a062	495	LPC_I2S->I2SDMA2 = (DMAConfig->depth) << 8;
igorsk	0:1063a091a062	496	}
igorsk	0:1063a091a062	497	} else {
igorsk	0:1063a091a062	498	if (DMAConfig->DMAIndex == I2S_DMA_1) {
igorsk	0:1063a091a062	499	LPC_I2S->I2SDMA1 = (DMAConfig->depth) << 16;
igorsk	0:1063a091a062	500	} else {
igorsk	0:1063a091a062	501	LPC_I2S->I2SDMA2 = (DMAConfig->depth) << 16;
igorsk	0:1063a091a062	502	}
igorsk	0:1063a091a062	503	}
igorsk	0:1063a091a062	504	}
igorsk	0:1063a091a062	505
igorsk	0:1063a091a062	506	/******************************************************************//
igorsk	0:1063a091a062	507	* @brief Enable/Disable DMA operation for I2S
igorsk	0:1063a091a062	508	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	509	* @param[in] DMAIndex chose what DMA is used, should be:
igorsk	0:1063a091a062	510	* - I2S_DMA_1: DMA1
igorsk	0:1063a091a062	511	* - I2S_DMA_2: DMA2
igorsk	0:1063a091a062	512	* @param[in] TRMode is transmit/receive mode, should be:
igorsk	0:1063a091a062	513	* - I2S_TX_MODE: transmit mode
igorsk	0:1063a091a062	514	* - I2S_RX_MODE: receive mode
igorsk	0:1063a091a062	515	* @param[in] NewState is new state of DMA operation, should be:
igorsk	0:1063a091a062	516	* - ENABLE
igorsk	0:1063a091a062	517	* - DISABLE
igorsk	0:1063a091a062	518	* @return none
igorsk	0:1063a091a062	519	*********************************************************************/
igorsk	0:1063a091a062	520	void I2S_DMACmd(LPC_I2S_TypeDef *I2Sx, uint8_t DMAIndex, uint8_t TRMode,
igorsk	0:1063a091a062	521	FunctionalState NewState)
igorsk	0:1063a091a062	522	{
igorsk	0:1063a091a062	523	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	524	CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));
igorsk	0:1063a091a062	525	CHECK_PARAM(PARAM_I2S_DMA(DMAIndex));
igorsk	0:1063a091a062	526	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
igorsk	0:1063a091a062	527
igorsk	0:1063a091a062	528	if (TRMode == I2S_RX_MODE) {
igorsk	0:1063a091a062	529	if (DMAIndex == I2S_DMA_1) {
igorsk	0:1063a091a062	530	if (NewState == ENABLE)
igorsk	0:1063a091a062	531	I2Sx->I2SDMA1 \|= 0x01;
igorsk	0:1063a091a062	532	else
igorsk	0:1063a091a062	533	I2Sx->I2SDMA1 &= ~0x01;
igorsk	0:1063a091a062	534	} else {
igorsk	0:1063a091a062	535	if (NewState == ENABLE)
igorsk	0:1063a091a062	536	I2Sx->I2SDMA2 \|= 0x01;
igorsk	0:1063a091a062	537	else
igorsk	0:1063a091a062	538	I2Sx->I2SDMA2 &= ~0x01;
igorsk	0:1063a091a062	539	}
igorsk	0:1063a091a062	540	} else {
igorsk	0:1063a091a062	541	if (DMAIndex == I2S_DMA_1) {
igorsk	0:1063a091a062	542	if (NewState == ENABLE)
igorsk	0:1063a091a062	543	I2Sx->I2SDMA1 \|= 0x02;
igorsk	0:1063a091a062	544	else
igorsk	0:1063a091a062	545	I2Sx->I2SDMA1 &= ~0x02;
igorsk	0:1063a091a062	546	} else {
igorsk	0:1063a091a062	547	if (NewState == ENABLE)
igorsk	0:1063a091a062	548	I2Sx->I2SDMA2 \|= 0x02;
igorsk	0:1063a091a062	549	else
igorsk	0:1063a091a062	550	I2Sx->I2SDMA2 &= ~0x02;
igorsk	0:1063a091a062	551	}
igorsk	0:1063a091a062	552	}
igorsk	0:1063a091a062	553	}
igorsk	0:1063a091a062	554
igorsk	0:1063a091a062	555	/******************************************************************//
igorsk	0:1063a091a062	556	* @brief Configure IRQ for I2S
igorsk	0:1063a091a062	557	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	558	* @param[in] TRMode is transmit/receive mode, should be:
igorsk	0:1063a091a062	559	* - I2S_TX_MODE: transmit mode
igorsk	0:1063a091a062	560	* - I2S_RX_MODE: receive mode
igorsk	0:1063a091a062	561	* @param[in] level: is the FIFO level that triggers IRQ request
igorsk	0:1063a091a062	562	* @param[in] pfnI2SCbs: the pointer to call-back function handle this interrupt
igorsk	0:1063a091a062	563	* @return none
igorsk	0:1063a091a062	564	*********************************************************************/
igorsk	0:1063a091a062	565	void I2S_IRQConfig(LPC_I2S_TypeDef I2Sx, uint8_t TRMode, uint8_t level, fnI2SCbs_Type pfnI2SCbs) {
igorsk	0:1063a091a062	566	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	567	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
igorsk	0:1063a091a062	568	CHECK_PARAM(PARAM_I2S_IRQ_LEVEL(level));
igorsk	0:1063a091a062	569
igorsk	0:1063a091a062	570	if (TRMode == I2S_RX_MODE) {
igorsk	0:1063a091a062	571	I2Sx->I2SIRQ \|= (level << 8);
igorsk	0:1063a091a062	572	} else {
igorsk	0:1063a091a062	573	I2Sx->I2SIRQ \|= (level << 16);
igorsk	0:1063a091a062	574	}
igorsk	0:1063a091a062	575	//setup Call-Back funtion for receive interrupt
igorsk	0:1063a091a062	576	_apfnI2SCbs[TRMode] = pfnI2SCbs;
igorsk	0:1063a091a062	577	}
igorsk	0:1063a091a062	578
igorsk	0:1063a091a062	579	/******************************************************************//
igorsk	0:1063a091a062	580	* @brief Enable/Disable IRQ for I2S
igorsk	0:1063a091a062	581	* @param[in] I2Sx: I2S peripheral selected, should be: I2S
igorsk	0:1063a091a062	582	* @param[in] TRMode is transmit/receive mode, should be:
igorsk	0:1063a091a062	583	* - I2S_TX_MODE: transmit mode
igorsk	0:1063a091a062	584	* - I2S_RX_MODE: receive mode
igorsk	0:1063a091a062	585	* @param[in] NewState is new state of DMA operation, should be:
igorsk	0:1063a091a062	586	* - ENABLE
igorsk	0:1063a091a062	587	* - DISABLE
igorsk	0:1063a091a062	588	* @return none
igorsk	0:1063a091a062	589	*********************************************************************/
igorsk	0:1063a091a062	590	void I2S_IRQCmd(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode, FunctionalState NewState) {
igorsk	0:1063a091a062	591	CHECK_PARAM(PARAM_I2Sx(I2Sx));
igorsk	0:1063a091a062	592	CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));
igorsk	0:1063a091a062	593
igorsk	0:1063a091a062	594	if (TRMode == I2S_RX_MODE) {
igorsk	0:1063a091a062	595	if (NewState == ENABLE)
igorsk	0:1063a091a062	596	I2Sx->I2SIRQ \|= 0x01;
igorsk	0:1063a091a062	597	else
igorsk	0:1063a091a062	598	I2Sx->I2SIRQ &= ~0x01;
igorsk	0:1063a091a062	599	//Enable DMA
igorsk	0:1063a091a062	600
igorsk	0:1063a091a062	601	} else {
igorsk	0:1063a091a062	602	if (NewState == ENABLE)
igorsk	0:1063a091a062	603	I2Sx->I2SIRQ \|= 0x02;
igorsk	0:1063a091a062	604	else
igorsk	0:1063a091a062	605	I2Sx->I2SIRQ &= ~0x02;
igorsk	0:1063a091a062	606	}
igorsk	0:1063a091a062	607	}
igorsk	0:1063a091a062	608	/*******************************************************************//
igorsk	0:1063a091a062	609	* @brief Standard I2S interrupt handler, this function will check
igorsk	0:1063a091a062	610	* all interrupt status of I2S channels, then execute the call
igorsk	0:1063a091a062	611	* back function if they're already installed
igorsk	0:1063a091a062	612	* @param[in] None
igorsk	0:1063a091a062	613	* @return None
igorsk	0:1063a091a062	614	**********************************************************************/
igorsk	0:1063a091a062	615	void I2S_IntHandler(void)
igorsk	0:1063a091a062	616	{
igorsk	0:1063a091a062	617	uint8_t rx_level,
igorsk	0:1063a091a062	618	tx_level,
igorsk	0:1063a091a062	619	tx_depth_irq,
igorsk	0:1063a091a062	620	rx_depth_irq;
igorsk	0:1063a091a062	621
igorsk	0:1063a091a062	622
igorsk	0:1063a091a062	623	if((LPC_I2S->I2SIRQ)& 0x01){ //receive interrupt
igorsk	0:1063a091a062	624	rx_level = ((LPC_I2S->I2SSTATE)>>8)&0xFF;
igorsk	0:1063a091a062	625	rx_depth_irq = ((LPC_I2S->I2SIRQ)>>8)&0xFF;
igorsk	0:1063a091a062	626
igorsk	0:1063a091a062	627	if (rx_level >= rx_depth_irq)//receive interrupt
igorsk	0:1063a091a062	628	{
igorsk	0:1063a091a062	629	_apfnI2SCbs[1]();
igorsk	0:1063a091a062	630	}
igorsk	0:1063a091a062	631	}
igorsk	0:1063a091a062	632	else if(((LPC_I2S->I2SIRQ)>>1)& 0x01)
igorsk	0:1063a091a062	633	{
igorsk	0:1063a091a062	634	tx_level = ((LPC_I2S->I2SSTATE)>>16)&0xFF;
igorsk	0:1063a091a062	635	tx_depth_irq = ((LPC_I2S->I2SIRQ)>>16)&0xFF;
igorsk	0:1063a091a062	636	if(tx_level <= tx_depth_irq)//transmit interrupt
igorsk	0:1063a091a062	637	{
igorsk	0:1063a091a062	638	_apfnI2SCbs[0]();
igorsk	0:1063a091a062	639	}
igorsk	0:1063a091a062	640	}
igorsk	0:1063a091a062	641	}
igorsk	0:1063a091a062	642
igorsk	0:1063a091a062	643	/**
igorsk	0:1063a091a062	644	* @}
igorsk	0:1063a091a062	645	*/
igorsk	0:1063a091a062	646
igorsk	0:1063a091a062	647	#endif /* _I2S */
igorsk	0:1063a091a062	648
igorsk	0:1063a091a062	649	#ifdef __cplusplus
igorsk	0:1063a091a062	650	}
igorsk	0:1063a091a062	651	#endif
igorsk	0:1063a091a062	652
igorsk	0:1063a091a062	653	/**
igorsk	0:1063a091a062	654	* @}
igorsk	0:1063a091a062	655	*/
igorsk	0:1063a091a062	656
igorsk	0:1063a091a062	657	/* --------------------------------- End Of File ------------------------------ */
igorsk	0:1063a091a062	658

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	17 Feb 2010
Imports:	121
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	5

source/lpc17xx_i2s.c@0:1063a091a062, 2010-02-17 (annotated)

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