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xeye_ atsu / Mbed 2 deprecated I2S_AIC23B_32khz_wavtest

I2S_Example/lpc17xx_i2s.c@0:63ed631d8c3a, 2011-01-21 (annotated)

Committer:: lynxeyed_atsu
Date:: Fri Jan 21 08:39:48 2011 +0000
Revision:: 0:63ed631d8c3a

Who changed what in which revision?

User	Revision	Line number	New contents of line
lynxeyed_atsu	0:63ed631d8c3a	1	/*********************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	2	* @file lpc17xx_i2s.c
lynxeyed_atsu	0:63ed631d8c3a	3	* @brief Contains all functions support for I2S firmware library on LPC17xx
lynxeyed_atsu	0:63ed631d8c3a	4	* @version 3.0
lynxeyed_atsu	0:63ed631d8c3a	5	* @date 18. June. 2010
lynxeyed_atsu	0:63ed631d8c3a	6	* @author NXP MCU SW Application Team
lynxeyed_atsu	0:63ed631d8c3a	7	**************************************************************************
lynxeyed_atsu	0:63ed631d8c3a	8	* Software that is described herein is for illustrative purposes only
lynxeyed_atsu	0:63ed631d8c3a	9	* which provides customers with programming information regarding the
lynxeyed_atsu	0:63ed631d8c3a	10	* products. This software is supplied "AS IS" without any warranties.
lynxeyed_atsu	0:63ed631d8c3a	11	* NXP Semiconductors assumes no responsibility or liability for the
lynxeyed_atsu	0:63ed631d8c3a	12	* use of the software, conveys no license or title under any patent,
lynxeyed_atsu	0:63ed631d8c3a	13	* copyright, or mask work right to the product. NXP Semiconductors
lynxeyed_atsu	0:63ed631d8c3a	14	* reserves the right to make changes in the software without
lynxeyed_atsu	0:63ed631d8c3a	15	* notification. NXP Semiconductors also make no representation or
lynxeyed_atsu	0:63ed631d8c3a	16	* warranty that such application will be suitable for the specified
lynxeyed_atsu	0:63ed631d8c3a	17	* use without further testing or modification.
lynxeyed_atsu	0:63ed631d8c3a	18	**********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	19
lynxeyed_atsu	0:63ed631d8c3a	20	/* Peripheral group ----------------------------------------------------------- */
lynxeyed_atsu	0:63ed631d8c3a	21	/** @addtogroup I2S
lynxeyed_atsu	0:63ed631d8c3a	22	* @{
lynxeyed_atsu	0:63ed631d8c3a	23	*/
lynxeyed_atsu	0:63ed631d8c3a	24
lynxeyed_atsu	0:63ed631d8c3a	25	/* Includes ------------------------------------------------------------------- */
lynxeyed_atsu	0:63ed631d8c3a	26	//#include "mbed.h"
lynxeyed_atsu	0:63ed631d8c3a	27	#include "lpc17xx_i2s.h"
lynxeyed_atsu	0:63ed631d8c3a	28	#include "lpc17xx_clkpwr.h"
lynxeyed_atsu	0:63ed631d8c3a	29	#include "mbed.h"
lynxeyed_atsu	0:63ed631d8c3a	30
lynxeyed_atsu	0:63ed631d8c3a	31
lynxeyed_atsu	0:63ed631d8c3a	32	/* If this source file built with example, the LPC17xx FW library configuration
lynxeyed_atsu	0:63ed631d8c3a	33	* file in each example directory ("lpc17xx_libcfg.h") must be included,
lynxeyed_atsu	0:63ed631d8c3a	34	* otherwise the default FW library configuration file must be included instead
lynxeyed_atsu	0:63ed631d8c3a	35	*/
lynxeyed_atsu	0:63ed631d8c3a	36	#ifdef __BUILD_WITH_EXAMPLE__
lynxeyed_atsu	0:63ed631d8c3a	37	#include "lpc17xx_libcfg.h"
lynxeyed_atsu	0:63ed631d8c3a	38	#else
lynxeyed_atsu	0:63ed631d8c3a	39	#include "lpc17xx_libcfg_default.h"
lynxeyed_atsu	0:63ed631d8c3a	40	#endif /* __BUILD_WITH_EXAMPLE__ */
lynxeyed_atsu	0:63ed631d8c3a	41
lynxeyed_atsu	0:63ed631d8c3a	42
lynxeyed_atsu	0:63ed631d8c3a	43	#ifdef _I2S
lynxeyed_atsu	0:63ed631d8c3a	44
lynxeyed_atsu	0:63ed631d8c3a	45	/* Private Functions ---------------------------------------------------------- */
lynxeyed_atsu	0:63ed631d8c3a	46
lynxeyed_atsu	0:63ed631d8c3a	47	static uint8_t i2s_GetWordWidth(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode);
lynxeyed_atsu	0:63ed631d8c3a	48	static uint8_t i2s_GetChannel(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode);
lynxeyed_atsu	0:63ed631d8c3a	49
lynxeyed_atsu	0:63ed631d8c3a	50	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	51	* @brief Get I2S wordwidth value
lynxeyed_atsu	0:63ed631d8c3a	52	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	53	* @param[in] TRMode is the I2S mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	54	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	55	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	56	* @return The wordwidth value, should be: 8,16 or 32
lynxeyed_atsu	0:63ed631d8c3a	57	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	58	static uint8_t i2s_GetWordWidth(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
lynxeyed_atsu	0:63ed631d8c3a	59	uint8_t value;
lynxeyed_atsu	0:63ed631d8c3a	60
lynxeyed_atsu	0:63ed631d8c3a	61	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	62	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
lynxeyed_atsu	0:63ed631d8c3a	63
lynxeyed_atsu	0:63ed631d8c3a	64	if (TRMode == I2S_TX_MODE) {
lynxeyed_atsu	0:63ed631d8c3a	65	value = (I2Sx->I2SDAO) & 0x03; /* get wordwidth bit */
lynxeyed_atsu	0:63ed631d8c3a	66	} else {
lynxeyed_atsu	0:63ed631d8c3a	67	value = (I2Sx->I2SDAI) & 0x03; /* get wordwidth bit */
lynxeyed_atsu	0:63ed631d8c3a	68	}
lynxeyed_atsu	0:63ed631d8c3a	69	switch (value) {
lynxeyed_atsu	0:63ed631d8c3a	70	case I2S_WORDWIDTH_8:
lynxeyed_atsu	0:63ed631d8c3a	71	return 8;
lynxeyed_atsu	0:63ed631d8c3a	72	case I2S_WORDWIDTH_16:
lynxeyed_atsu	0:63ed631d8c3a	73	return 16;
lynxeyed_atsu	0:63ed631d8c3a	74	default:
lynxeyed_atsu	0:63ed631d8c3a	75	return 32;
lynxeyed_atsu	0:63ed631d8c3a	76	}
lynxeyed_atsu	0:63ed631d8c3a	77	}
lynxeyed_atsu	0:63ed631d8c3a	78
lynxeyed_atsu	0:63ed631d8c3a	79	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	80	* @brief Get I2S channel value
lynxeyed_atsu	0:63ed631d8c3a	81	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	82	* @param[in] TRMode is the I2S mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	83	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	84	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	85	* @return The channel value, should be: 1(mono) or 2(stereo)
lynxeyed_atsu	0:63ed631d8c3a	86	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	87	static uint8_t i2s_GetChannel(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
lynxeyed_atsu	0:63ed631d8c3a	88	uint8_t value;
lynxeyed_atsu	0:63ed631d8c3a	89
lynxeyed_atsu	0:63ed631d8c3a	90	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	91	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
lynxeyed_atsu	0:63ed631d8c3a	92
lynxeyed_atsu	0:63ed631d8c3a	93	if (TRMode == I2S_TX_MODE) {
lynxeyed_atsu	0:63ed631d8c3a	94	value = (I2Sx->I2SDAO) & 0x04; /* get bit[2] */
lynxeyed_atsu	0:63ed631d8c3a	95	} else {
lynxeyed_atsu	0:63ed631d8c3a	96	value = (I2Sx->I2SDAI) & 0x04; /* get bit[2] */
lynxeyed_atsu	0:63ed631d8c3a	97	}
lynxeyed_atsu	0:63ed631d8c3a	98	if(value == I2S_MONO) return 1;
lynxeyed_atsu	0:63ed631d8c3a	99	return 2;
lynxeyed_atsu	0:63ed631d8c3a	100	}
lynxeyed_atsu	0:63ed631d8c3a	101
lynxeyed_atsu	0:63ed631d8c3a	102	/* End of Private Functions --------------------------------------------------- */
lynxeyed_atsu	0:63ed631d8c3a	103
lynxeyed_atsu	0:63ed631d8c3a	104
lynxeyed_atsu	0:63ed631d8c3a	105	/* Public Functions ----------------------------------------------------------- */
lynxeyed_atsu	0:63ed631d8c3a	106	/** @addtogroup I2S_Public_Functions
lynxeyed_atsu	0:63ed631d8c3a	107	* @{
lynxeyed_atsu	0:63ed631d8c3a	108	*/
lynxeyed_atsu	0:63ed631d8c3a	109
lynxeyed_atsu	0:63ed631d8c3a	110	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	111	* @brief Initialize I2S
lynxeyed_atsu	0:63ed631d8c3a	112	* - Turn on power and clock
lynxeyed_atsu	0:63ed631d8c3a	113	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	114	* @return none
lynxeyed_atsu	0:63ed631d8c3a	115	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	116	void I2S_Init(LPC_I2S_TypeDef *I2Sx) {
lynxeyed_atsu	0:63ed631d8c3a	117	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	118
lynxeyed_atsu	0:63ed631d8c3a	119	// Turn on power and clock
lynxeyed_atsu	0:63ed631d8c3a	120	CLKPWR_ConfigPPWR(CLKPWR_PCONP_PCI2S, ENABLE);
lynxeyed_atsu	0:63ed631d8c3a	121	LPC_I2S->I2SDAI = LPC_I2S->I2SDAO = 0x00;
lynxeyed_atsu	0:63ed631d8c3a	122	}
lynxeyed_atsu	0:63ed631d8c3a	123
lynxeyed_atsu	0:63ed631d8c3a	124	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	125	* @brief Configuration I2S, setting:
lynxeyed_atsu	0:63ed631d8c3a	126	* - master/slave mode
lynxeyed_atsu	0:63ed631d8c3a	127	* - wordwidth value
lynxeyed_atsu	0:63ed631d8c3a	128	* - channel mode
lynxeyed_atsu	0:63ed631d8c3a	129	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	130	* @param[in] TRMode transmit/receive mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	131	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	132	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	133	* @param[in] ConfigStruct pointer to I2S_CFG_Type structure
lynxeyed_atsu	0:63ed631d8c3a	134	* which will be initialized.
lynxeyed_atsu	0:63ed631d8c3a	135	* @return none
lynxeyed_atsu	0:63ed631d8c3a	136	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	137	void I2S_Config(LPC_I2S_TypeDef I2Sx, uint8_t TRMode, I2S_CFG_Type ConfigStruct)
lynxeyed_atsu	0:63ed631d8c3a	138	{
lynxeyed_atsu	0:63ed631d8c3a	139	uint32_t bps, config;
lynxeyed_atsu	0:63ed631d8c3a	140
lynxeyed_atsu	0:63ed631d8c3a	141	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	142
lynxeyed_atsu	0:63ed631d8c3a	143	CHECK_PARAM(PARAM_I2S_WORDWIDTH(ConfigStruct->wordwidth));
lynxeyed_atsu	0:63ed631d8c3a	144	CHECK_PARAM(PARAM_I2S_CHANNEL(ConfigStruct->mono));
lynxeyed_atsu	0:63ed631d8c3a	145	CHECK_PARAM(PARAM_I2S_STOP(ConfigStruct->stop));
lynxeyed_atsu	0:63ed631d8c3a	146	CHECK_PARAM(PARAM_I2S_RESET(ConfigStruct->reset));
lynxeyed_atsu	0:63ed631d8c3a	147	CHECK_PARAM(PARAM_I2S_WS_SEL(ConfigStruct->ws_sel));
lynxeyed_atsu	0:63ed631d8c3a	148	CHECK_PARAM(PARAM_I2S_MUTE(ConfigStruct->mute));
lynxeyed_atsu	0:63ed631d8c3a	149
lynxeyed_atsu	0:63ed631d8c3a	150	/* Setup clock */
lynxeyed_atsu	0:63ed631d8c3a	151	bps = (ConfigStruct->wordwidth +1)*8;
lynxeyed_atsu	0:63ed631d8c3a	152
lynxeyed_atsu	0:63ed631d8c3a	153	/* Calculate audio config */
lynxeyed_atsu	0:63ed631d8c3a	154	config = (bps - 1)<<6 \| (ConfigStruct->ws_sel)<<5 \| (ConfigStruct->reset)<<4 \|
lynxeyed_atsu	0:63ed631d8c3a	155	(ConfigStruct->stop)<<3 \| (ConfigStruct->mono)<<2 \| (ConfigStruct->wordwidth);
lynxeyed_atsu	0:63ed631d8c3a	156
lynxeyed_atsu	0:63ed631d8c3a	157	if(TRMode == I2S_RX_MODE){
lynxeyed_atsu	0:63ed631d8c3a	158	LPC_I2S->I2SDAI = config;
lynxeyed_atsu	0:63ed631d8c3a	159	}else{
lynxeyed_atsu	0:63ed631d8c3a	160	LPC_I2S->I2SDAO = config;
lynxeyed_atsu	0:63ed631d8c3a	161	}
lynxeyed_atsu	0:63ed631d8c3a	162	}
lynxeyed_atsu	0:63ed631d8c3a	163
lynxeyed_atsu	0:63ed631d8c3a	164	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	165	* @brief DeInitial both I2S transmit or receive
lynxeyed_atsu	0:63ed631d8c3a	166	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	167	* @return none
lynxeyed_atsu	0:63ed631d8c3a	168	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	169	void I2S_DeInit(LPC_I2S_TypeDef *I2Sx) {
lynxeyed_atsu	0:63ed631d8c3a	170	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	171
lynxeyed_atsu	0:63ed631d8c3a	172	// Turn off power and clock
lynxeyed_atsu	0:63ed631d8c3a	173	CLKPWR_ConfigPPWR(CLKPWR_PCONP_PCI2S, DISABLE);
lynxeyed_atsu	0:63ed631d8c3a	174	}
lynxeyed_atsu	0:63ed631d8c3a	175
lynxeyed_atsu	0:63ed631d8c3a	176	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	177	* @brief Get I2S Buffer Level
lynxeyed_atsu	0:63ed631d8c3a	178	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	179	* @param[in] TRMode Transmit/receive mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	180	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	181	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	182	* @return current level of Transmit/Receive Buffer
lynxeyed_atsu	0:63ed631d8c3a	183	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	184	uint8_t I2S_GetLevel(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode)
lynxeyed_atsu	0:63ed631d8c3a	185	{
lynxeyed_atsu	0:63ed631d8c3a	186	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	187	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
lynxeyed_atsu	0:63ed631d8c3a	188
lynxeyed_atsu	0:63ed631d8c3a	189	if(TRMode == I2S_TX_MODE)
lynxeyed_atsu	0:63ed631d8c3a	190	{
lynxeyed_atsu	0:63ed631d8c3a	191	return ((I2Sx->I2SSTATE >> 16) & 0xFF);
lynxeyed_atsu	0:63ed631d8c3a	192	}
lynxeyed_atsu	0:63ed631d8c3a	193	else
lynxeyed_atsu	0:63ed631d8c3a	194	{
lynxeyed_atsu	0:63ed631d8c3a	195	return ((I2Sx->I2SSTATE >> 8) & 0xFF);
lynxeyed_atsu	0:63ed631d8c3a	196	}
lynxeyed_atsu	0:63ed631d8c3a	197	}
lynxeyed_atsu	0:63ed631d8c3a	198
lynxeyed_atsu	0:63ed631d8c3a	199	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	200	* @brief I2S Start: clear all STOP,RESET and MUTE bit, ready to operate
lynxeyed_atsu	0:63ed631d8c3a	201	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	202	* @return none
lynxeyed_atsu	0:63ed631d8c3a	203	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	204	void I2S_Start(LPC_I2S_TypeDef *I2Sx)
lynxeyed_atsu	0:63ed631d8c3a	205	{
lynxeyed_atsu	0:63ed631d8c3a	206	//Clear STOP,RESET and MUTE bit
lynxeyed_atsu	0:63ed631d8c3a	207	I2Sx->I2SDAO &= ~I2S_DAI_RESET;
lynxeyed_atsu	0:63ed631d8c3a	208	I2Sx->I2SDAI &= ~I2S_DAI_RESET;
lynxeyed_atsu	0:63ed631d8c3a	209	I2Sx->I2SDAO &= ~I2S_DAI_STOP;
lynxeyed_atsu	0:63ed631d8c3a	210	I2Sx->I2SDAI &= ~I2S_DAI_STOP;
lynxeyed_atsu	0:63ed631d8c3a	211	I2Sx->I2SDAO &= ~I2S_DAI_MUTE;
lynxeyed_atsu	0:63ed631d8c3a	212	}
lynxeyed_atsu	0:63ed631d8c3a	213
lynxeyed_atsu	0:63ed631d8c3a	214	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	215	* @brief I2S Send data
lynxeyed_atsu	0:63ed631d8c3a	216	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	217	* @param[in] BufferData pointer to uint32_t is the data will be send
lynxeyed_atsu	0:63ed631d8c3a	218	* @return none
lynxeyed_atsu	0:63ed631d8c3a	219	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	220	void I2S_Send(LPC_I2S_TypeDef *I2Sx, uint32_t BufferData) {
lynxeyed_atsu	0:63ed631d8c3a	221	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	222
lynxeyed_atsu	0:63ed631d8c3a	223	I2Sx->I2STXFIFO = BufferData;
lynxeyed_atsu	0:63ed631d8c3a	224	}
lynxeyed_atsu	0:63ed631d8c3a	225
lynxeyed_atsu	0:63ed631d8c3a	226	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	227	* @brief I2S Receive Data
lynxeyed_atsu	0:63ed631d8c3a	228	* @param[in] I2Sx pointer to LPC_I2S_TypeDef
lynxeyed_atsu	0:63ed631d8c3a	229	* @return received value
lynxeyed_atsu	0:63ed631d8c3a	230	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	231	uint32_t I2S_Receive(LPC_I2S_TypeDef* I2Sx) {
lynxeyed_atsu	0:63ed631d8c3a	232	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	233
lynxeyed_atsu	0:63ed631d8c3a	234	return (I2Sx->I2SRXFIFO);
lynxeyed_atsu	0:63ed631d8c3a	235
lynxeyed_atsu	0:63ed631d8c3a	236	}
lynxeyed_atsu	0:63ed631d8c3a	237
lynxeyed_atsu	0:63ed631d8c3a	238	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	239	* @brief I2S Pause
lynxeyed_atsu	0:63ed631d8c3a	240	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	241	* @param[in] TRMode is transmit/receive mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	242	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	243	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	244	* @return none
lynxeyed_atsu	0:63ed631d8c3a	245	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	246	void I2S_Pause(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
lynxeyed_atsu	0:63ed631d8c3a	247	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	248	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
lynxeyed_atsu	0:63ed631d8c3a	249
lynxeyed_atsu	0:63ed631d8c3a	250	if (TRMode == I2S_TX_MODE) //Transmit mode
lynxeyed_atsu	0:63ed631d8c3a	251	{
lynxeyed_atsu	0:63ed631d8c3a	252	I2Sx->I2SDAO \|= I2S_DAO_STOP;
lynxeyed_atsu	0:63ed631d8c3a	253	} else //Receive mode
lynxeyed_atsu	0:63ed631d8c3a	254	{
lynxeyed_atsu	0:63ed631d8c3a	255	I2Sx->I2SDAI \|= I2S_DAI_STOP;
lynxeyed_atsu	0:63ed631d8c3a	256	}
lynxeyed_atsu	0:63ed631d8c3a	257	}
lynxeyed_atsu	0:63ed631d8c3a	258
lynxeyed_atsu	0:63ed631d8c3a	259	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	260	* @brief I2S Mute
lynxeyed_atsu	0:63ed631d8c3a	261	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	262	* @param[in] TRMode is transmit/receive mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	263	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	264	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	265	* @return none
lynxeyed_atsu	0:63ed631d8c3a	266	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	267	void I2S_Mute(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
lynxeyed_atsu	0:63ed631d8c3a	268	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	269	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
lynxeyed_atsu	0:63ed631d8c3a	270
lynxeyed_atsu	0:63ed631d8c3a	271	if (TRMode == I2S_TX_MODE) //Transmit mode
lynxeyed_atsu	0:63ed631d8c3a	272	{
lynxeyed_atsu	0:63ed631d8c3a	273	I2Sx->I2SDAO \|= I2S_DAO_MUTE;
lynxeyed_atsu	0:63ed631d8c3a	274	} else //Receive mode
lynxeyed_atsu	0:63ed631d8c3a	275	{
lynxeyed_atsu	0:63ed631d8c3a	276	I2Sx->I2SDAI \|= I2S_DAI_MUTE;
lynxeyed_atsu	0:63ed631d8c3a	277	}
lynxeyed_atsu	0:63ed631d8c3a	278	}
lynxeyed_atsu	0:63ed631d8c3a	279
lynxeyed_atsu	0:63ed631d8c3a	280	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	281	* @brief I2S Stop
lynxeyed_atsu	0:63ed631d8c3a	282	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	283	* @param[in] TRMode is transmit/receive mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	284	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	285	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	286	* @return none
lynxeyed_atsu	0:63ed631d8c3a	287	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	288	void I2S_Stop(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode) {
lynxeyed_atsu	0:63ed631d8c3a	289	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	290	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
lynxeyed_atsu	0:63ed631d8c3a	291
lynxeyed_atsu	0:63ed631d8c3a	292	if (TRMode == I2S_TX_MODE) //Transmit mode
lynxeyed_atsu	0:63ed631d8c3a	293	{
lynxeyed_atsu	0:63ed631d8c3a	294	I2Sx->I2SDAO &= ~I2S_DAO_MUTE;
lynxeyed_atsu	0:63ed631d8c3a	295	I2Sx->I2SDAO \|= I2S_DAO_STOP;
lynxeyed_atsu	0:63ed631d8c3a	296	I2Sx->I2SDAO \|= I2S_DAO_RESET;
lynxeyed_atsu	0:63ed631d8c3a	297	} else //Receive mode
lynxeyed_atsu	0:63ed631d8c3a	298	{
lynxeyed_atsu	0:63ed631d8c3a	299	I2Sx->I2SDAI \|= I2S_DAI_STOP;
lynxeyed_atsu	0:63ed631d8c3a	300	I2Sx->I2SDAI \|= I2S_DAI_RESET;
lynxeyed_atsu	0:63ed631d8c3a	301	}
lynxeyed_atsu	0:63ed631d8c3a	302	}
lynxeyed_atsu	0:63ed631d8c3a	303
lynxeyed_atsu	0:63ed631d8c3a	304	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	305	* @brief Set frequency for I2S
lynxeyed_atsu	0:63ed631d8c3a	306	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	307	* @param[in] Freq is the frequency for I2S will be set. It can range
lynxeyed_atsu	0:63ed631d8c3a	308	* from 16-96 kHz(16, 22.05, 32, 44.1, 48, 96kHz)
lynxeyed_atsu	0:63ed631d8c3a	309	* @param[in] TRMode is transmit/receive mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	310	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	311	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	312	* @return Status: ERROR or SUCCESS
lynxeyed_atsu	0:63ed631d8c3a	313	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	314	Status I2S_FreqConfig(LPC_I2S_TypeDef *I2Sx, uint32_t Freq, uint8_t TRMode) {
lynxeyed_atsu	0:63ed631d8c3a	315
lynxeyed_atsu	0:63ed631d8c3a	316	/* Calculate bit rate
lynxeyed_atsu	0:63ed631d8c3a	317	* The formula is:
lynxeyed_atsu	0:63ed631d8c3a	318	* bit_rate = channel*wordwidth - 1
lynxeyed_atsu	0:63ed631d8c3a	319	* 48kHz sample rate for 16 bit stereo date requires
lynxeyed_atsu	0:63ed631d8c3a	320	* a bit rate of 48000162=1536MHz (MCLK)
lynxeyed_atsu	0:63ed631d8c3a	321	*/
lynxeyed_atsu	0:63ed631d8c3a	322	uint32_t i2sPclk;
lynxeyed_atsu	0:63ed631d8c3a	323	uint64_t divider;
lynxeyed_atsu	0:63ed631d8c3a	324	uint8_t bitrate, channel, wordwidth;
lynxeyed_atsu	0:63ed631d8c3a	325	uint32_t x, y;
lynxeyed_atsu	0:63ed631d8c3a	326	uint16_t dif;
lynxeyed_atsu	0:63ed631d8c3a	327	uint16_t error;
lynxeyed_atsu	0:63ed631d8c3a	328	uint8_t x_divide, y_divide=0;
lynxeyed_atsu	0:63ed631d8c3a	329	uint16_t ErrorOptimal = 0xFFFF;
lynxeyed_atsu	0:63ed631d8c3a	330
lynxeyed_atsu	0:63ed631d8c3a	331	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	332	CHECK_PARAM(PRAM_I2S_FREQ(Freq));
lynxeyed_atsu	0:63ed631d8c3a	333	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
lynxeyed_atsu	0:63ed631d8c3a	334
lynxeyed_atsu	0:63ed631d8c3a	335	i2sPclk = CLKPWR_GetPCLK(CLKPWR_PCLKSEL_I2S);
lynxeyed_atsu	0:63ed631d8c3a	336	printf("I2S_PCLK = %dHz\r\n",i2sPclk);
lynxeyed_atsu	0:63ed631d8c3a	337	if(TRMode == I2S_TX_MODE)
lynxeyed_atsu	0:63ed631d8c3a	338	{
lynxeyed_atsu	0:63ed631d8c3a	339	channel = i2s_GetChannel(I2Sx,I2S_TX_MODE);
lynxeyed_atsu	0:63ed631d8c3a	340	wordwidth = i2s_GetWordWidth(I2Sx,I2S_TX_MODE);
lynxeyed_atsu	0:63ed631d8c3a	341	}
lynxeyed_atsu	0:63ed631d8c3a	342	else
lynxeyed_atsu	0:63ed631d8c3a	343	{
lynxeyed_atsu	0:63ed631d8c3a	344	channel = i2s_GetChannel(I2Sx,I2S_RX_MODE);
lynxeyed_atsu	0:63ed631d8c3a	345	wordwidth = i2s_GetWordWidth(I2Sx,I2S_RX_MODE);
lynxeyed_atsu	0:63ed631d8c3a	346	}
lynxeyed_atsu	0:63ed631d8c3a	347	bitrate = channel * wordwidth - 1;
lynxeyed_atsu	0:63ed631d8c3a	348	if (TRMode == I2S_TX_MODE)// Transmitter
lynxeyed_atsu	0:63ed631d8c3a	349	{
lynxeyed_atsu	0:63ed631d8c3a	350	I2Sx->I2STXBITRATE = bitrate;
lynxeyed_atsu	0:63ed631d8c3a	351	} else //Receiver
lynxeyed_atsu	0:63ed631d8c3a	352	{
lynxeyed_atsu	0:63ed631d8c3a	353	I2Sx->I2SRXBITRATE = bitrate;
lynxeyed_atsu	0:63ed631d8c3a	354	}
lynxeyed_atsu	0:63ed631d8c3a	355	printf("TX CHANNEL= %d\r\n",i2s_GetChannel(I2Sx,I2S_TX_MODE));
lynxeyed_atsu	0:63ed631d8c3a	356	printf("TX WORDWIDTH= %dbits \r\n",i2s_GetWordWidth(I2Sx,I2S_TX_MODE));
lynxeyed_atsu	0:63ed631d8c3a	357	printf("I2STXBITRATE= %d,bitrate= %d \r\n",I2Sx->I2STXBITRATE,bitrate);
lynxeyed_atsu	0:63ed631d8c3a	358	/* Calculate X and Y divider
lynxeyed_atsu	0:63ed631d8c3a	359	* The MCLK rate for the I2S transmitter is determined by the value
lynxeyed_atsu	0:63ed631d8c3a	360	* in the I2STXRATE/I2SRXRATE register. The required I2STXRATE/I2SRXRATE
lynxeyed_atsu	0:63ed631d8c3a	361	* setting depends on the desired audio sample rate desired, the format
lynxeyed_atsu	0:63ed631d8c3a	362	* (stereo/mono) used, and the data size.
lynxeyed_atsu	0:63ed631d8c3a	363	* The formula is:
lynxeyed_atsu	0:63ed631d8c3a	364	* I2S_MCLK = PCLK * (X/Y) / 2
lynxeyed_atsu	0:63ed631d8c3a	365	* We have:
lynxeyed_atsu	0:63ed631d8c3a	366	* I2S_MCLK = Freq * bit_rate;
lynxeyed_atsu	0:63ed631d8c3a	367	* So: (X/Y) = (Freq * bit_rate)/PCLK*2
lynxeyed_atsu	0:63ed631d8c3a	368	* We use a loop function to chose the most suitable X,Y value
lynxeyed_atsu	0:63ed631d8c3a	369	*/
lynxeyed_atsu	0:63ed631d8c3a	370
lynxeyed_atsu	0:63ed631d8c3a	371	divider = ((uint64_t)(Freq ( bitrate+1)/ * 2*/)<<16) / i2sPclk;
lynxeyed_atsu	0:63ed631d8c3a	372	for (y = 255; y > 0; y--) {
lynxeyed_atsu	0:63ed631d8c3a	373	x = y * divider;
lynxeyed_atsu	0:63ed631d8c3a	374	dif = x & 0xFFFF;
lynxeyed_atsu	0:63ed631d8c3a	375	if(dif>0x8000) error = 0x10000-dif;
lynxeyed_atsu	0:63ed631d8c3a	376	else error = dif;
lynxeyed_atsu	0:63ed631d8c3a	377	if (error == 0)
lynxeyed_atsu	0:63ed631d8c3a	378	{
lynxeyed_atsu	0:63ed631d8c3a	379	y_divide = y;
lynxeyed_atsu	0:63ed631d8c3a	380	break;
lynxeyed_atsu	0:63ed631d8c3a	381	}
lynxeyed_atsu	0:63ed631d8c3a	382	else if (error < ErrorOptimal)
lynxeyed_atsu	0:63ed631d8c3a	383	{
lynxeyed_atsu	0:63ed631d8c3a	384	ErrorOptimal = error;
lynxeyed_atsu	0:63ed631d8c3a	385	y_divide = y;
lynxeyed_atsu	0:63ed631d8c3a	386	}
lynxeyed_atsu	0:63ed631d8c3a	387	}
lynxeyed_atsu	0:63ed631d8c3a	388	//y_divide--;//for test
lynxeyed_atsu	0:63ed631d8c3a	389	x_divide = (y_divide * Freq ( bitrate+1) 2)/i2sPclk;
lynxeyed_atsu	0:63ed631d8c3a	390	if (TRMode == I2S_TX_MODE)// Transmitter
lynxeyed_atsu	0:63ed631d8c3a	391	{
lynxeyed_atsu	0:63ed631d8c3a	392	I2Sx->I2STXRATE = y_divide \| (x_divide << 8);
lynxeyed_atsu	0:63ed631d8c3a	393	} else //Receiver
lynxeyed_atsu	0:63ed631d8c3a	394	{
lynxeyed_atsu	0:63ed631d8c3a	395	I2Sx->I2SRXRATE = y_divide \| (x_divide << 8);
lynxeyed_atsu	0:63ed631d8c3a	396	}
lynxeyed_atsu	0:63ed631d8c3a	397
lynxeyed_atsu	0:63ed631d8c3a	398	printf("I2STXRATE=%d, x_divide=%d, y_divide=%d \r\n",I2Sx->I2STXRATE,x_divide,y_divide);
lynxeyed_atsu	0:63ed631d8c3a	399	return SUCCESS;
lynxeyed_atsu	0:63ed631d8c3a	400	}
lynxeyed_atsu	0:63ed631d8c3a	401
lynxeyed_atsu	0:63ed631d8c3a	402	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	403	* @brief I2S set bitrate
lynxeyed_atsu	0:63ed631d8c3a	404	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	405	* @param[in] bitrate value will be set, it can be calculate as follows:
lynxeyed_atsu	0:63ed631d8c3a	406	* bitrate = channel * wordwidth - 1
lynxeyed_atsu	0:63ed631d8c3a	407	* bitrate value should be in range: 0 .. 63
lynxeyed_atsu	0:63ed631d8c3a	408	* @param[in] TRMode is transmit/receive mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	409	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	410	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	411	* @return none
lynxeyed_atsu	0:63ed631d8c3a	412	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	413	void I2S_SetBitRate(LPC_I2S_TypeDef *I2Sx, uint8_t bitrate, uint8_t TRMode)
lynxeyed_atsu	0:63ed631d8c3a	414	{
lynxeyed_atsu	0:63ed631d8c3a	415	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	416	CHECK_PARAM(PARAM_I2S_BITRATE(bitrate));
lynxeyed_atsu	0:63ed631d8c3a	417	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
lynxeyed_atsu	0:63ed631d8c3a	418
lynxeyed_atsu	0:63ed631d8c3a	419	if(TRMode == I2S_TX_MODE)
lynxeyed_atsu	0:63ed631d8c3a	420	{
lynxeyed_atsu	0:63ed631d8c3a	421	I2Sx->I2STXBITRATE = bitrate;
lynxeyed_atsu	0:63ed631d8c3a	422	}
lynxeyed_atsu	0:63ed631d8c3a	423	else
lynxeyed_atsu	0:63ed631d8c3a	424	{
lynxeyed_atsu	0:63ed631d8c3a	425	I2Sx->I2SRXBITRATE = bitrate;
lynxeyed_atsu	0:63ed631d8c3a	426	}
lynxeyed_atsu	0:63ed631d8c3a	427	}
lynxeyed_atsu	0:63ed631d8c3a	428
lynxeyed_atsu	0:63ed631d8c3a	429	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	430	* @brief Configuration operating mode for I2S
lynxeyed_atsu	0:63ed631d8c3a	431	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	432	* @param[in] ModeConfig pointer to I2S_MODEConf_Type will be used to
lynxeyed_atsu	0:63ed631d8c3a	433	* configure
lynxeyed_atsu	0:63ed631d8c3a	434	* @param[in] TRMode is transmit/receive mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	435	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	436	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	437	* @return none
lynxeyed_atsu	0:63ed631d8c3a	438	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	439	void I2S_ModeConfig(LPC_I2S_TypeDef I2Sx, I2S_MODEConf_Type ModeConfig,
lynxeyed_atsu	0:63ed631d8c3a	440	uint8_t TRMode)
lynxeyed_atsu	0:63ed631d8c3a	441	{
lynxeyed_atsu	0:63ed631d8c3a	442	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	443	CHECK_PARAM(PARAM_I2S_CLKSEL(ModeConfig->clksel));
lynxeyed_atsu	0:63ed631d8c3a	444	CHECK_PARAM(PARAM_I2S_4PIN(ModeConfig->fpin));
lynxeyed_atsu	0:63ed631d8c3a	445	CHECK_PARAM(PARAM_I2S_MCLK(ModeConfig->mcena));
lynxeyed_atsu	0:63ed631d8c3a	446	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
lynxeyed_atsu	0:63ed631d8c3a	447
lynxeyed_atsu	0:63ed631d8c3a	448	if (TRMode == I2S_TX_MODE) {
lynxeyed_atsu	0:63ed631d8c3a	449	I2Sx->I2STXMODE &= ~0x0F; //clear bit 3:0 in I2STXMODE register
lynxeyed_atsu	0:63ed631d8c3a	450	if (ModeConfig->clksel == I2S_CLKSEL_MCLK) {
lynxeyed_atsu	0:63ed631d8c3a	451	I2Sx->I2STXMODE \|= 0x02;
lynxeyed_atsu	0:63ed631d8c3a	452	}
lynxeyed_atsu	0:63ed631d8c3a	453	if (ModeConfig->fpin == I2S_4PIN_ENABLE) {
lynxeyed_atsu	0:63ed631d8c3a	454	I2Sx->I2STXMODE \|= (1 << 2);
lynxeyed_atsu	0:63ed631d8c3a	455	}
lynxeyed_atsu	0:63ed631d8c3a	456	if (ModeConfig->mcena == I2S_MCLK_ENABLE) {
lynxeyed_atsu	0:63ed631d8c3a	457	I2Sx->I2STXMODE \|= (1 << 3);
lynxeyed_atsu	0:63ed631d8c3a	458	}
lynxeyed_atsu	0:63ed631d8c3a	459	} else {
lynxeyed_atsu	0:63ed631d8c3a	460	I2Sx->I2SRXMODE &= ~0x0F; //clear bit 3:0 in I2STXMODE register
lynxeyed_atsu	0:63ed631d8c3a	461	if (ModeConfig->clksel == I2S_CLKSEL_MCLK) {
lynxeyed_atsu	0:63ed631d8c3a	462	I2Sx->I2SRXMODE \|= 0x02;
lynxeyed_atsu	0:63ed631d8c3a	463	}
lynxeyed_atsu	0:63ed631d8c3a	464	if (ModeConfig->fpin == I2S_4PIN_ENABLE) {
lynxeyed_atsu	0:63ed631d8c3a	465	I2Sx->I2SRXMODE \|= (1 << 2);
lynxeyed_atsu	0:63ed631d8c3a	466	}
lynxeyed_atsu	0:63ed631d8c3a	467	if (ModeConfig->mcena == I2S_MCLK_ENABLE) {
lynxeyed_atsu	0:63ed631d8c3a	468	I2Sx->I2SRXMODE \|= (1 << 3);
lynxeyed_atsu	0:63ed631d8c3a	469	}
lynxeyed_atsu	0:63ed631d8c3a	470	}
lynxeyed_atsu	0:63ed631d8c3a	471	}
lynxeyed_atsu	0:63ed631d8c3a	472
lynxeyed_atsu	0:63ed631d8c3a	473	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	474	* @brief Configure DMA operation for I2S
lynxeyed_atsu	0:63ed631d8c3a	475	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	476	* @param[in] DMAConfig pointer to I2S_DMAConf_Type will be used to configure
lynxeyed_atsu	0:63ed631d8c3a	477	* @param[in] TRMode is transmit/receive mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	478	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	479	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	480	* @return none
lynxeyed_atsu	0:63ed631d8c3a	481	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	482	void I2S_DMAConfig(LPC_I2S_TypeDef I2Sx, I2S_DMAConf_Type DMAConfig,
lynxeyed_atsu	0:63ed631d8c3a	483	uint8_t TRMode)
lynxeyed_atsu	0:63ed631d8c3a	484	{
lynxeyed_atsu	0:63ed631d8c3a	485	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	486	CHECK_PARAM(PARAM_I2S_DMA(DMAConfig->DMAIndex));
lynxeyed_atsu	0:63ed631d8c3a	487	CHECK_PARAM(PARAM_I2S_DMA_DEPTH(DMAConfig->depth));
lynxeyed_atsu	0:63ed631d8c3a	488	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
lynxeyed_atsu	0:63ed631d8c3a	489
lynxeyed_atsu	0:63ed631d8c3a	490	if (TRMode == I2S_RX_MODE) {
lynxeyed_atsu	0:63ed631d8c3a	491	if (DMAConfig->DMAIndex == I2S_DMA_1) {
lynxeyed_atsu	0:63ed631d8c3a	492	LPC_I2S->I2SDMA1 = (DMAConfig->depth) << 8;
lynxeyed_atsu	0:63ed631d8c3a	493	} else {
lynxeyed_atsu	0:63ed631d8c3a	494	LPC_I2S->I2SDMA2 = (DMAConfig->depth) << 8;
lynxeyed_atsu	0:63ed631d8c3a	495	}
lynxeyed_atsu	0:63ed631d8c3a	496	} else {
lynxeyed_atsu	0:63ed631d8c3a	497	if (DMAConfig->DMAIndex == I2S_DMA_1) {
lynxeyed_atsu	0:63ed631d8c3a	498	LPC_I2S->I2SDMA1 = (DMAConfig->depth) << 16;
lynxeyed_atsu	0:63ed631d8c3a	499	} else {
lynxeyed_atsu	0:63ed631d8c3a	500	LPC_I2S->I2SDMA2 = (DMAConfig->depth) << 16;
lynxeyed_atsu	0:63ed631d8c3a	501	}
lynxeyed_atsu	0:63ed631d8c3a	502	}
lynxeyed_atsu	0:63ed631d8c3a	503	}
lynxeyed_atsu	0:63ed631d8c3a	504
lynxeyed_atsu	0:63ed631d8c3a	505	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	506	* @brief Enable/Disable DMA operation for I2S
lynxeyed_atsu	0:63ed631d8c3a	507	* @param[in] I2Sx: I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	508	* @param[in] DMAIndex chose what DMA is used, should be:
lynxeyed_atsu	0:63ed631d8c3a	509	* - I2S_DMA_1 = 0: DMA1
lynxeyed_atsu	0:63ed631d8c3a	510	* - I2S_DMA_2 = 1: DMA2
lynxeyed_atsu	0:63ed631d8c3a	511	* @param[in] TRMode is transmit/receive mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	512	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	513	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	514	* @param[in] NewState is new state of DMA operation, should be:
lynxeyed_atsu	0:63ed631d8c3a	515	* - ENABLE
lynxeyed_atsu	0:63ed631d8c3a	516	* - DISABLE
lynxeyed_atsu	0:63ed631d8c3a	517	* @return none
lynxeyed_atsu	0:63ed631d8c3a	518	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	519	void I2S_DMACmd(LPC_I2S_TypeDef *I2Sx, uint8_t DMAIndex, uint8_t TRMode,
lynxeyed_atsu	0:63ed631d8c3a	520	FunctionalState NewState)
lynxeyed_atsu	0:63ed631d8c3a	521	{
lynxeyed_atsu	0:63ed631d8c3a	522	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	523	CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));
lynxeyed_atsu	0:63ed631d8c3a	524	CHECK_PARAM(PARAM_I2S_DMA(DMAIndex));
lynxeyed_atsu	0:63ed631d8c3a	525	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
lynxeyed_atsu	0:63ed631d8c3a	526
lynxeyed_atsu	0:63ed631d8c3a	527	if (TRMode == I2S_RX_MODE) {
lynxeyed_atsu	0:63ed631d8c3a	528	if (DMAIndex == I2S_DMA_1) {
lynxeyed_atsu	0:63ed631d8c3a	529	if (NewState == ENABLE)
lynxeyed_atsu	0:63ed631d8c3a	530	I2Sx->I2SDMA1 \|= 0x01;
lynxeyed_atsu	0:63ed631d8c3a	531	else
lynxeyed_atsu	0:63ed631d8c3a	532	I2Sx->I2SDMA1 &= ~0x01;
lynxeyed_atsu	0:63ed631d8c3a	533	} else {
lynxeyed_atsu	0:63ed631d8c3a	534	if (NewState == ENABLE)
lynxeyed_atsu	0:63ed631d8c3a	535	I2Sx->I2SDMA2 \|= 0x01;
lynxeyed_atsu	0:63ed631d8c3a	536	else
lynxeyed_atsu	0:63ed631d8c3a	537	I2Sx->I2SDMA2 &= ~0x01;
lynxeyed_atsu	0:63ed631d8c3a	538	}
lynxeyed_atsu	0:63ed631d8c3a	539	} else {
lynxeyed_atsu	0:63ed631d8c3a	540	if (DMAIndex == I2S_DMA_1) {
lynxeyed_atsu	0:63ed631d8c3a	541	if (NewState == ENABLE)
lynxeyed_atsu	0:63ed631d8c3a	542	I2Sx->I2SDMA1 \|= 0x02;
lynxeyed_atsu	0:63ed631d8c3a	543	else
lynxeyed_atsu	0:63ed631d8c3a	544	I2Sx->I2SDMA1 &= ~0x02;
lynxeyed_atsu	0:63ed631d8c3a	545	} else {
lynxeyed_atsu	0:63ed631d8c3a	546	if (NewState == ENABLE)
lynxeyed_atsu	0:63ed631d8c3a	547	I2Sx->I2SDMA2 \|= 0x02;
lynxeyed_atsu	0:63ed631d8c3a	548	else
lynxeyed_atsu	0:63ed631d8c3a	549	I2Sx->I2SDMA2 &= ~0x02;
lynxeyed_atsu	0:63ed631d8c3a	550	}
lynxeyed_atsu	0:63ed631d8c3a	551	}
lynxeyed_atsu	0:63ed631d8c3a	552	}
lynxeyed_atsu	0:63ed631d8c3a	553
lynxeyed_atsu	0:63ed631d8c3a	554	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	555	* @brief Configure IRQ for I2S
lynxeyed_atsu	0:63ed631d8c3a	556	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	557	* @param[in] TRMode is transmit/receive mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	558	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	559	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	560	* @param[in] level is the FIFO level that triggers IRQ request
lynxeyed_atsu	0:63ed631d8c3a	561	* @return none
lynxeyed_atsu	0:63ed631d8c3a	562	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	563	void I2S_IRQConfig(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode, uint8_t level) {
lynxeyed_atsu	0:63ed631d8c3a	564	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	565	CHECK_PARAM(PARAM_I2S_TRX(TRMode));
lynxeyed_atsu	0:63ed631d8c3a	566	CHECK_PARAM(PARAM_I2S_IRQ_LEVEL(level));
lynxeyed_atsu	0:63ed631d8c3a	567
lynxeyed_atsu	0:63ed631d8c3a	568	if (TRMode == I2S_RX_MODE) {
lynxeyed_atsu	0:63ed631d8c3a	569	I2Sx->I2SIRQ \|= (level << 8);
lynxeyed_atsu	0:63ed631d8c3a	570	} else {
lynxeyed_atsu	0:63ed631d8c3a	571	I2Sx->I2SIRQ \|= (level << 16);
lynxeyed_atsu	0:63ed631d8c3a	572	}
lynxeyed_atsu	0:63ed631d8c3a	573	}
lynxeyed_atsu	0:63ed631d8c3a	574
lynxeyed_atsu	0:63ed631d8c3a	575	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	576	* @brief Enable/Disable IRQ for I2S
lynxeyed_atsu	0:63ed631d8c3a	577	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	578	* @param[in] TRMode is transmit/receive mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	579	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	580	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	581	* @param[in] NewState is new state of DMA operation, should be:
lynxeyed_atsu	0:63ed631d8c3a	582	* - ENABLE
lynxeyed_atsu	0:63ed631d8c3a	583	* - DISABLE
lynxeyed_atsu	0:63ed631d8c3a	584	* @return none
lynxeyed_atsu	0:63ed631d8c3a	585	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	586	void I2S_IRQCmd(LPC_I2S_TypeDef *I2Sx, uint8_t TRMode, FunctionalState NewState) {
lynxeyed_atsu	0:63ed631d8c3a	587	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	588	CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));
lynxeyed_atsu	0:63ed631d8c3a	589
lynxeyed_atsu	0:63ed631d8c3a	590	if (TRMode == I2S_RX_MODE) {
lynxeyed_atsu	0:63ed631d8c3a	591	if (NewState == ENABLE)
lynxeyed_atsu	0:63ed631d8c3a	592	I2Sx->I2SIRQ \|= 0x01;
lynxeyed_atsu	0:63ed631d8c3a	593	else
lynxeyed_atsu	0:63ed631d8c3a	594	I2Sx->I2SIRQ &= ~0x01;
lynxeyed_atsu	0:63ed631d8c3a	595	//Enable DMA
lynxeyed_atsu	0:63ed631d8c3a	596
lynxeyed_atsu	0:63ed631d8c3a	597	} else {
lynxeyed_atsu	0:63ed631d8c3a	598	if (NewState == ENABLE)
lynxeyed_atsu	0:63ed631d8c3a	599	I2Sx->I2SIRQ \|= 0x02;
lynxeyed_atsu	0:63ed631d8c3a	600	else
lynxeyed_atsu	0:63ed631d8c3a	601	I2Sx->I2SIRQ &= ~0x02;
lynxeyed_atsu	0:63ed631d8c3a	602	}
lynxeyed_atsu	0:63ed631d8c3a	603	}
lynxeyed_atsu	0:63ed631d8c3a	604
lynxeyed_atsu	0:63ed631d8c3a	605	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	606	* @brief Get I2S interrupt status
lynxeyed_atsu	0:63ed631d8c3a	607	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	608	* @param[in] TRMode is transmit/receive mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	609	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	610	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	611	* @return FunctionState should be:
lynxeyed_atsu	0:63ed631d8c3a	612	* - ENABLE: interrupt is enable
lynxeyed_atsu	0:63ed631d8c3a	613	* - DISABLE: interrupt is disable
lynxeyed_atsu	0:63ed631d8c3a	614	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	615	FunctionalState I2S_GetIRQStatus(LPC_I2S_TypeDef *I2Sx,uint8_t TRMode)
lynxeyed_atsu	0:63ed631d8c3a	616	{
lynxeyed_atsu	0:63ed631d8c3a	617	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	618	if(TRMode == I2S_TX_MODE)
lynxeyed_atsu	0:63ed631d8c3a	619	return (FunctionalState)((I2Sx->I2SIRQ >> 1)&0x01);
lynxeyed_atsu	0:63ed631d8c3a	620	else
lynxeyed_atsu	0:63ed631d8c3a	621	return (FunctionalState)((I2Sx->I2SIRQ)&0x01);
lynxeyed_atsu	0:63ed631d8c3a	622	}
lynxeyed_atsu	0:63ed631d8c3a	623
lynxeyed_atsu	0:63ed631d8c3a	624	/******************************************************************//
lynxeyed_atsu	0:63ed631d8c3a	625	* @brief Get I2S interrupt depth
lynxeyed_atsu	0:63ed631d8c3a	626	* @param[in] I2Sx I2S peripheral selected, should be: LPC_I2S
lynxeyed_atsu	0:63ed631d8c3a	627	* @param[in] TRMode is transmit/receive mode, should be:
lynxeyed_atsu	0:63ed631d8c3a	628	* - I2S_TX_MODE = 0: transmit mode
lynxeyed_atsu	0:63ed631d8c3a	629	* - I2S_RX_MODE = 1: receive mode
lynxeyed_atsu	0:63ed631d8c3a	630	* @return depth of FIFO level on which to create an irq request
lynxeyed_atsu	0:63ed631d8c3a	631	*********************************************************************/
lynxeyed_atsu	0:63ed631d8c3a	632	uint8_t I2S_GetIRQDepth(LPC_I2S_TypeDef *I2Sx,uint8_t TRMode)
lynxeyed_atsu	0:63ed631d8c3a	633	{
lynxeyed_atsu	0:63ed631d8c3a	634	CHECK_PARAM(PARAM_I2Sx(I2Sx));
lynxeyed_atsu	0:63ed631d8c3a	635	if(TRMode == I2S_TX_MODE)
lynxeyed_atsu	0:63ed631d8c3a	636	return (((I2Sx->I2SIRQ)>>16)&0xFF);
lynxeyed_atsu	0:63ed631d8c3a	637	else
lynxeyed_atsu	0:63ed631d8c3a	638	return (((I2Sx->I2SIRQ)>>8)&0xFF);
lynxeyed_atsu	0:63ed631d8c3a	639	}
lynxeyed_atsu	0:63ed631d8c3a	640	/**
lynxeyed_atsu	0:63ed631d8c3a	641	* @}
lynxeyed_atsu	0:63ed631d8c3a	642	*/
lynxeyed_atsu	0:63ed631d8c3a	643
lynxeyed_atsu	0:63ed631d8c3a	644	#endif /* _I2S */
lynxeyed_atsu	0:63ed631d8c3a	645
lynxeyed_atsu	0:63ed631d8c3a	646	/**
lynxeyed_atsu	0:63ed631d8c3a	647	* @}
lynxeyed_atsu	0:63ed631d8c3a	648	*/
lynxeyed_atsu	0:63ed631d8c3a	649
lynxeyed_atsu	0:63ed631d8c3a	650	/* --------------------------------- End Of File ------------------------------ */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	21 Jan 2011
Imports:	2
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	2

I2S_Example/lpc17xx_i2s.c@0:63ed631d8c3a, 2011-01-21 (annotated)

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