LPC1700CMSIS_Examples - These are the examples provided for [[/users/fran…

Users » frank26080115 » Code » LPC1700CMSIS_Examples

These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!

I2S/I2S_test_4_wire/i2s_test_4_wire.c@0:bf7b9fba3924, 2011-03-20 (annotated)

Committer:: frank26080115
Date:: Sun Mar 20 05:38:56 2011 +0000
Revision:: 0:bf7b9fba3924

Who changed what in which revision?

User	Revision	Line number	New contents of line
frank26080115	0:bf7b9fba3924	1	/*********************************************************************//
frank26080115	0:bf7b9fba3924	2	* @file i2s_test_4_wire.c
frank26080115	0:bf7b9fba3924	3	* @purpose This example describes how to use I2S 4-wire mode
frank26080115	0:bf7b9fba3924	4	* @version 2.0
frank26080115	0:bf7b9fba3924	5	* @date 21. May. 2010
frank26080115	0:bf7b9fba3924	6	* @author NXP MCU SW Application Team
frank26080115	0:bf7b9fba3924	7	*---------------------------------------------------------------------
frank26080115	0:bf7b9fba3924	8	* Software that is described herein is for illustrative purposes only
frank26080115	0:bf7b9fba3924	9	* which provides customers with programming information regarding the
frank26080115	0:bf7b9fba3924	10	* products. This software is supplied "AS IS" without any warranties.
frank26080115	0:bf7b9fba3924	11	* NXP Semiconductors assumes no responsibility or liability for the
frank26080115	0:bf7b9fba3924	12	* use of the software, conveys no license or title under any patent,
frank26080115	0:bf7b9fba3924	13	* copyright, or mask work right to the product. NXP Semiconductors
frank26080115	0:bf7b9fba3924	14	* reserves the right to make changes in the software without
frank26080115	0:bf7b9fba3924	15	* notification. NXP Semiconductors also make no representation or
frank26080115	0:bf7b9fba3924	16	* warranty that such application will be suitable for the specified
frank26080115	0:bf7b9fba3924	17	* use without further testing or modification.
frank26080115	0:bf7b9fba3924	18	**********************************************************************/
frank26080115	0:bf7b9fba3924	19	#include "lpc17xx_i2s.h"
frank26080115	0:bf7b9fba3924	20	#include "lpc17xx_libcfg.h"
frank26080115	0:bf7b9fba3924	21	#include "lpc17xx_pinsel.h"
frank26080115	0:bf7b9fba3924	22	#include "debug_frmwrk.h"
frank26080115	0:bf7b9fba3924	23
frank26080115	0:bf7b9fba3924	24	/* Example group ----------------------------------------------------------- */
frank26080115	0:bf7b9fba3924	25	/** @defgroup I2S_test_4_wire I2S_test_4_wire
frank26080115	0:bf7b9fba3924	26	* @ingroup I2S_Examples
frank26080115	0:bf7b9fba3924	27	* @{
frank26080115	0:bf7b9fba3924	28	*/
frank26080115	0:bf7b9fba3924	29
frank26080115	0:bf7b9fba3924	30	///************************ PRIVATE DEFINITIONS ***********************/
frank26080115	0:bf7b9fba3924	31	/** Max buffer length */
frank26080115	0:bf7b9fba3924	32	#define BUFFER_SIZE 0x400
frank26080115	0:bf7b9fba3924	33	/** I2S Buffer Source Address is AHBRAM1_BASE that used for USB RAM purpose, but
frank26080115	0:bf7b9fba3924	34	* it is not used in this example, so this memory section can be used for general purpose
frank26080115	0:bf7b9fba3924	35	* memory
frank26080115	0:bf7b9fba3924	36	*/
frank26080115	0:bf7b9fba3924	37	#define I2S_BUFFER_SRC LPC_AHBRAM1_BASE
frank26080115	0:bf7b9fba3924	38	/** I2S Buffer Destination Address is (AHBRAM1_BASE + 0x100UL) that used for USB RAM purpose, but
frank26080115	0:bf7b9fba3924	39	* it is not used in this example, so this memory section can be used for general purpose
frank26080115	0:bf7b9fba3924	40	* memory
frank26080115	0:bf7b9fba3924	41	*/
frank26080115	0:bf7b9fba3924	42	#define I2S_BUFFER_DST (I2S_BUFFER_SRC+0x1000UL)
frank26080115	0:bf7b9fba3924	43
frank26080115	0:bf7b9fba3924	44	/************************ PRIVATE VARIABLES *********************/
frank26080115	0:bf7b9fba3924	45	uint8_t menu[]=
frank26080115	0:bf7b9fba3924	46	"********************************************************************************\n\r"
frank26080115	0:bf7b9fba3924	47	"Hello NXP Semiconductors \n\r"
frank26080115	0:bf7b9fba3924	48	" I2S 4-wire demo \n\r"
frank26080115	0:bf7b9fba3924	49	"\t - MCU: LPC17xx \n\r"
frank26080115	0:bf7b9fba3924	50	"\t - Core: ARM CORTEX-M3 \n\r"
frank26080115	0:bf7b9fba3924	51	"\t - Communicate via: UART0 - 115200 bps \n\r"
frank26080115	0:bf7b9fba3924	52	" Use two I2S channels in the same board to transfer data in 4-wire mode\n\r"
frank26080115	0:bf7b9fba3924	53	"********************************************************************************\n\r";
frank26080115	0:bf7b9fba3924	54	volatile uint8_t I2STXDone = 0;
frank26080115	0:bf7b9fba3924	55	volatile uint8_t I2SRXDone = 0;
frank26080115	0:bf7b9fba3924	56
frank26080115	0:bf7b9fba3924	57	volatile uint32_t I2STXBuffer = (uint32_t)(I2S_BUFFER_SRC);
frank26080115	0:bf7b9fba3924	58	volatile uint32_t I2SRXBuffer = (uint32_t )(I2S_BUFFER_DST);
frank26080115	0:bf7b9fba3924	59
frank26080115	0:bf7b9fba3924	60	volatile uint32_t I2SReadLength = 0;
frank26080115	0:bf7b9fba3924	61	volatile uint32_t I2SWriteLength = 0;
frank26080115	0:bf7b9fba3924	62
frank26080115	0:bf7b9fba3924	63
frank26080115	0:bf7b9fba3924	64	/************************ PRIVATE FUNCTIONS ***********************/
frank26080115	0:bf7b9fba3924	65	void Buffer_Init(void);
frank26080115	0:bf7b9fba3924	66	Bool Buffer_Verify(void);
frank26080115	0:bf7b9fba3924	67	void print_menu(void);
frank26080115	0:bf7b9fba3924	68
frank26080115	0:bf7b9fba3924	69	/-------------------------PRIVATE FUNCTIONS------------------------------/
frank26080115	0:bf7b9fba3924	70	/*******************************************************************//
frank26080115	0:bf7b9fba3924	71	* @brief Initialize buffer
frank26080115	0:bf7b9fba3924	72	* @param[in] None
frank26080115	0:bf7b9fba3924	73	* @return None
frank26080115	0:bf7b9fba3924	74	**********************************************************************/
frank26080115	0:bf7b9fba3924	75	void Buffer_Init(void) {
frank26080115	0:bf7b9fba3924	76	uint32_t i;
frank26080115	0:bf7b9fba3924	77
frank26080115	0:bf7b9fba3924	78	for (i = 0; i < BUFFER_SIZE; i++) {
frank26080115	0:bf7b9fba3924	79	I2STXBuffer[i] = i;
frank26080115	0:bf7b9fba3924	80	I2SRXBuffer[i] = 0;
frank26080115	0:bf7b9fba3924	81	}
frank26080115	0:bf7b9fba3924	82	}
frank26080115	0:bf7b9fba3924	83
frank26080115	0:bf7b9fba3924	84	/*******************************************************************//
frank26080115	0:bf7b9fba3924	85	* @brief Verify buffer
frank26080115	0:bf7b9fba3924	86	* @param[in] none
frank26080115	0:bf7b9fba3924	87	* @return TRUE - if two buffers are similar
frank26080115	0:bf7b9fba3924	88	* FALSE - if two buffers are different
frank26080115	0:bf7b9fba3924	89	**********************************************************************/
frank26080115	0:bf7b9fba3924	90	Bool Buffer_Verify(void) {
frank26080115	0:bf7b9fba3924	91	uint32_t i;
frank26080115	0:bf7b9fba3924	92	uint32_t pTX = (uint32_t ) &I2STXBuffer[0];
frank26080115	0:bf7b9fba3924	93	/* Generally, first element of RX buffer is a dummy data, so
frank26080115	0:bf7b9fba3924	94	* it will be discarded
frank26080115	0:bf7b9fba3924	95	*/
frank26080115	0:bf7b9fba3924	96	uint32_t pRX = (uint32_t ) &I2SRXBuffer[1];
frank26080115	0:bf7b9fba3924	97
frank26080115	0:bf7b9fba3924	98	for (i = 1; i < BUFFER_SIZE; i++) {
frank26080115	0:bf7b9fba3924	99	if (pTX++ != pRX++) {
frank26080115	0:bf7b9fba3924	100	return FALSE;
frank26080115	0:bf7b9fba3924	101	}
frank26080115	0:bf7b9fba3924	102	}
frank26080115	0:bf7b9fba3924	103	return TRUE;
frank26080115	0:bf7b9fba3924	104	}
frank26080115	0:bf7b9fba3924	105	/*******************************************************************//
frank26080115	0:bf7b9fba3924	106	* @brief Print menu
frank26080115	0:bf7b9fba3924	107	* @param[in] none
frank26080115	0:bf7b9fba3924	108	* @return None
frank26080115	0:bf7b9fba3924	109	**********************************************************************/
frank26080115	0:bf7b9fba3924	110	void print_menu(void)
frank26080115	0:bf7b9fba3924	111	{
frank26080115	0:bf7b9fba3924	112	_DBG_(menu);
frank26080115	0:bf7b9fba3924	113	}
frank26080115	0:bf7b9fba3924	114
frank26080115	0:bf7b9fba3924	115	/-------------------------MAIN FUNCTION------------------------------/
frank26080115	0:bf7b9fba3924	116	/*******************************************************************//
frank26080115	0:bf7b9fba3924	117	* @brief c_entry: Main I2S program body
frank26080115	0:bf7b9fba3924	118	* @param[in] None
frank26080115	0:bf7b9fba3924	119	* @return int
frank26080115	0:bf7b9fba3924	120	**********************************************************************/
frank26080115	0:bf7b9fba3924	121	int c_entry (void) {
frank26080115	0:bf7b9fba3924	122	uint32_t i;
frank26080115	0:bf7b9fba3924	123	uint8_t dummy=0;
frank26080115	0:bf7b9fba3924	124	I2S_MODEConf_Type I2S_ClkConfig;
frank26080115	0:bf7b9fba3924	125	I2S_CFG_Type I2S_ConfigStruct;
frank26080115	0:bf7b9fba3924	126	PINSEL_CFG_Type PinCfg;
frank26080115	0:bf7b9fba3924	127
frank26080115	0:bf7b9fba3924	128	/* Initialize debug via UART0
frank26080115	0:bf7b9fba3924	129	* 115200bps
frank26080115	0:bf7b9fba3924	130	* 8 data bit
frank26080115	0:bf7b9fba3924	131	* No parity
frank26080115	0:bf7b9fba3924	132	* 1 stop bit
frank26080115	0:bf7b9fba3924	133	* No flow control
frank26080115	0:bf7b9fba3924	134	*/
frank26080115	0:bf7b9fba3924	135	debug_frmwrk_init();
frank26080115	0:bf7b9fba3924	136
frank26080115	0:bf7b9fba3924	137	//print menu screen
frank26080115	0:bf7b9fba3924	138	print_menu();
frank26080115	0:bf7b9fba3924	139
frank26080115	0:bf7b9fba3924	140	Buffer_Init();
frank26080115	0:bf7b9fba3924	141
frank26080115	0:bf7b9fba3924	142	/* Pin configuration:
frank26080115	0:bf7b9fba3924	143	* Assign: - P0.4 as I2SRX_CLK
frank26080115	0:bf7b9fba3924	144	* - P0.5 as I2SRX_WS
frank26080115	0:bf7b9fba3924	145	* - P0.6 as I2SRX_SDA
frank26080115	0:bf7b9fba3924	146	* - P0.7 as I2STX_CLK
frank26080115	0:bf7b9fba3924	147	* - P0.8 as I2STX_WS
frank26080115	0:bf7b9fba3924	148	* - P0.9 as I2STX_SDA
frank26080115	0:bf7b9fba3924	149	*/
frank26080115	0:bf7b9fba3924	150	PinCfg.Funcnum = 1;
frank26080115	0:bf7b9fba3924	151	PinCfg.OpenDrain = 0;
frank26080115	0:bf7b9fba3924	152	PinCfg.Pinmode = 0;
frank26080115	0:bf7b9fba3924	153	PinCfg.Pinnum = 4;
frank26080115	0:bf7b9fba3924	154	PinCfg.Portnum = 0;
frank26080115	0:bf7b9fba3924	155	PINSEL_ConfigPin(&PinCfg);
frank26080115	0:bf7b9fba3924	156	PinCfg.Pinnum = 5;
frank26080115	0:bf7b9fba3924	157	PINSEL_ConfigPin(&PinCfg);
frank26080115	0:bf7b9fba3924	158	PinCfg.Pinnum = 6;
frank26080115	0:bf7b9fba3924	159	PINSEL_ConfigPin(&PinCfg);
frank26080115	0:bf7b9fba3924	160	PinCfg.Pinnum = 7;
frank26080115	0:bf7b9fba3924	161	PINSEL_ConfigPin(&PinCfg);
frank26080115	0:bf7b9fba3924	162	PinCfg.Pinnum = 8;
frank26080115	0:bf7b9fba3924	163	PINSEL_ConfigPin(&PinCfg);
frank26080115	0:bf7b9fba3924	164	PinCfg.Pinnum = 9;
frank26080115	0:bf7b9fba3924	165	PINSEL_ConfigPin(&PinCfg);
frank26080115	0:bf7b9fba3924	166
frank26080115	0:bf7b9fba3924	167	I2S_Init(LPC_I2S);
frank26080115	0:bf7b9fba3924	168
frank26080115	0:bf7b9fba3924	169	//Setup for I2S: RX is similar with TX
frank26080115	0:bf7b9fba3924	170	/* setup:
frank26080115	0:bf7b9fba3924	171	* - wordwidth: 16 bits
frank26080115	0:bf7b9fba3924	172	* - stereo mode
frank26080115	0:bf7b9fba3924	173	* - master mode for I2S_TX and slave for I2S_RX
frank26080115	0:bf7b9fba3924	174	* - ws_halfperiod is 31
frank26080115	0:bf7b9fba3924	175	* - not use mute mode
frank26080115	0:bf7b9fba3924	176	* - use reset and stop mode
frank26080115	0:bf7b9fba3924	177	* - select the fractional rate divider clock output as the source,
frank26080115	0:bf7b9fba3924	178	* - disable 4-pin mode
frank26080115	0:bf7b9fba3924	179	* - MCLK ouput is disable
frank26080115	0:bf7b9fba3924	180	* - Frequency = 44.1 kHz (x=8,y=51 - automatic setting)
frank26080115	0:bf7b9fba3924	181	* Because we use mode I2STXMODE[3:0]= 0000, I2SDAO[5]=0 and
frank26080115	0:bf7b9fba3924	182	* I2SRX[3:0]=0000, I2SDAI[5] = 1. So we have I2SRX_CLK = I2STX_CLK
frank26080115	0:bf7b9fba3924	183	* --> I2SRXBITRATE = 1 (not divide TXCLK to produce RXCLK)
frank26080115	0:bf7b9fba3924	184	*/
frank26080115	0:bf7b9fba3924	185
frank26080115	0:bf7b9fba3924	186	/* Audio Config*/
frank26080115	0:bf7b9fba3924	187	I2S_ConfigStruct.wordwidth = I2S_WORDWIDTH_16;
frank26080115	0:bf7b9fba3924	188	I2S_ConfigStruct.mono = I2S_STEREO;
frank26080115	0:bf7b9fba3924	189	I2S_ConfigStruct.stop = I2S_STOP_ENABLE;
frank26080115	0:bf7b9fba3924	190	I2S_ConfigStruct.reset = I2S_RESET_ENABLE;
frank26080115	0:bf7b9fba3924	191	I2S_ConfigStruct.ws_sel = I2S_MASTER_MODE;
frank26080115	0:bf7b9fba3924	192	I2S_ConfigStruct.mute = I2S_MUTE_DISABLE;
frank26080115	0:bf7b9fba3924	193	I2S_Config(LPC_I2S,I2S_TX_MODE,&I2S_ConfigStruct);
frank26080115	0:bf7b9fba3924	194
frank26080115	0:bf7b9fba3924	195	I2S_ConfigStruct.ws_sel = I2S_SLAVE_MODE;
frank26080115	0:bf7b9fba3924	196	I2S_Config(LPC_I2S,I2S_RX_MODE,&I2S_ConfigStruct);
frank26080115	0:bf7b9fba3924	197
frank26080115	0:bf7b9fba3924	198	/* Clock Mode Config*/
frank26080115	0:bf7b9fba3924	199	I2S_ClkConfig.clksel = I2S_CLKSEL_FRDCLK;
frank26080115	0:bf7b9fba3924	200	I2S_ClkConfig.fpin = I2S_4PIN_DISABLE;
frank26080115	0:bf7b9fba3924	201	I2S_ClkConfig.mcena = I2S_MCLK_DISABLE;
frank26080115	0:bf7b9fba3924	202	I2S_ModeConfig(LPC_I2S,&I2S_ClkConfig,I2S_TX_MODE);
frank26080115	0:bf7b9fba3924	203	I2S_ClkConfig.fpin = I2S_4PIN_ENABLE;
frank26080115	0:bf7b9fba3924	204	I2S_ModeConfig(LPC_I2S,&I2S_ClkConfig,I2S_RX_MODE);
frank26080115	0:bf7b9fba3924	205
frank26080115	0:bf7b9fba3924	206	/* Set up frequency and bit rate*/
frank26080115	0:bf7b9fba3924	207	I2S_FreqConfig(LPC_I2S, 44100, I2S_TX_MODE);
frank26080115	0:bf7b9fba3924	208
frank26080115	0:bf7b9fba3924	209	I2S_Start(LPC_I2S);
frank26080115	0:bf7b9fba3924	210	while(I2STXDone == 0\|\|I2SRXDone == 0){
frank26080115	0:bf7b9fba3924	211	if(I2STXDone ==0){
frank26080115	0:bf7b9fba3924	212	while (I2S_GetLevel(LPC_I2S,I2S_TX_MODE)!=0x00);
frank26080115	0:bf7b9fba3924	213	I2S_Send(LPC_I2S,I2STXBuffer[I2SWriteLength]);
frank26080115	0:bf7b9fba3924	214	I2SWriteLength +=1;
frank26080115	0:bf7b9fba3924	215	if(I2SWriteLength == BUFFER_SIZE) I2STXDone = 1;
frank26080115	0:bf7b9fba3924	216
frank26080115	0:bf7b9fba3924	217	}
frank26080115	0:bf7b9fba3924	218	if(I2SRXDone == 0)
frank26080115	0:bf7b9fba3924	219	{
frank26080115	0:bf7b9fba3924	220	while(I2S_GetLevel(LPC_I2S,I2S_RX_MODE)==0x00);
frank26080115	0:bf7b9fba3924	221	if(dummy == 0) //dummy receive
frank26080115	0:bf7b9fba3924	222	{
frank26080115	0:bf7b9fba3924	223	i = I2S_Receive(LPC_I2S);
frank26080115	0:bf7b9fba3924	224	dummy = 1;
frank26080115	0:bf7b9fba3924	225	}
frank26080115	0:bf7b9fba3924	226	else
frank26080115	0:bf7b9fba3924	227	{
frank26080115	0:bf7b9fba3924	228	(uint32_t )(&I2SRXBuffer[I2SReadLength]) = I2S_Receive(LPC_I2S);
frank26080115	0:bf7b9fba3924	229	I2SReadLength +=1;
frank26080115	0:bf7b9fba3924	230	}
frank26080115	0:bf7b9fba3924	231	if(I2SReadLength == BUFFER_SIZE) I2SRXDone = 1;
frank26080115	0:bf7b9fba3924	232	}
frank26080115	0:bf7b9fba3924	233	}
frank26080115	0:bf7b9fba3924	234	for(i=0;i<BUFFER_SIZE;i++)
frank26080115	0:bf7b9fba3924	235	{
frank26080115	0:bf7b9fba3924	236	_DBH32(I2SRXBuffer[i]);_DBG_("");
frank26080115	0:bf7b9fba3924	237	}
frank26080115	0:bf7b9fba3924	238	if(Buffer_Verify())
frank26080115	0:bf7b9fba3924	239	{
frank26080115	0:bf7b9fba3924	240	_DBG_("Verify Buffer: OK...");
frank26080115	0:bf7b9fba3924	241	}
frank26080115	0:bf7b9fba3924	242	else
frank26080115	0:bf7b9fba3924	243	{
frank26080115	0:bf7b9fba3924	244	_DBG_("Verify Buffer: ERROR...");
frank26080115	0:bf7b9fba3924	245	}
frank26080115	0:bf7b9fba3924	246	while(1);
frank26080115	0:bf7b9fba3924	247	}
frank26080115	0:bf7b9fba3924	248
frank26080115	0:bf7b9fba3924	249	/* With ARM and GHS toolsets, the entry point is main() - this will
frank26080115	0:bf7b9fba3924	250	allow the linker to generate wrapper code to setup stacks, allocate
frank26080115	0:bf7b9fba3924	251	heap area, and initialize and copy code and data segments. For GNU
frank26080115	0:bf7b9fba3924	252	toolsets, the entry point is through __start() in the crt0_gnu.asm
frank26080115	0:bf7b9fba3924	253	file, and that startup code will setup stacks and data */
frank26080115	0:bf7b9fba3924	254	int main(void)
frank26080115	0:bf7b9fba3924	255	{
frank26080115	0:bf7b9fba3924	256	return c_entry();
frank26080115	0:bf7b9fba3924	257	}
frank26080115	0:bf7b9fba3924	258
frank26080115	0:bf7b9fba3924	259	#ifdef DEBUG
frank26080115	0:bf7b9fba3924	260	/*******************************************************************************
frank26080115	0:bf7b9fba3924	261	* @brief Reports the name of the source file and the source line number
frank26080115	0:bf7b9fba3924	262	* where the CHECK_PARAM error has occurred.
frank26080115	0:bf7b9fba3924	263	* @param[in] file Pointer to the source file name
frank26080115	0:bf7b9fba3924	264	* @param[in] line assert_param error line source number
frank26080115	0:bf7b9fba3924	265	* @return None
frank26080115	0:bf7b9fba3924	266	*******************************************************************************/
frank26080115	0:bf7b9fba3924	267	void check_failed(uint8_t *file, uint32_t line)
frank26080115	0:bf7b9fba3924	268	{
frank26080115	0:bf7b9fba3924	269	/* User can add his own implementation to report the file name and line number,
frank26080115	0:bf7b9fba3924	270	ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
frank26080115	0:bf7b9fba3924	271
frank26080115	0:bf7b9fba3924	272	/* Infinite loop */
frank26080115	0:bf7b9fba3924	273	while(1);
frank26080115	0:bf7b9fba3924	274	}
frank26080115	0:bf7b9fba3924	275	#endif
frank26080115	0:bf7b9fba3924	276
frank26080115	0:bf7b9fba3924	277	/*
frank26080115	0:bf7b9fba3924	278	* @}
frank26080115	0:bf7b9fba3924	279	*/

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Type:	Program
Created:	20 Mar 2011
Imports:	199
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	7

I2S/I2S_test_4_wire/i2s_test_4_wire.c@0:bf7b9fba3924, 2011-03-20 (annotated)

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