Arduino_MP3_Shield_MP3Player - Arduino MP3 Shield MP3Player This program com…

Users » xshige » Code » Arduino_MP3_Shield_MP3Player

Shigeki KOMATSU / Mbed 2 deprecated Arduino_MP3_Shield_MP3Player

Arduino MP3 Shield MP3Player This program comes from http://mbed.org/cookbook/VS1002-MP3-Decoder (Very small modification done to fit latest libs)

Dependencies: mbed SDFileSystem

VS1002.cpp@0:8eab2c229d83, 2010-10-03 (annotated)

Committer:: xshige
Date:: Sun Oct 03 16:56:38 2010 +0000
Revision:: 0:8eab2c229d83

Who changed what in which revision?

User	Revision	Line number	New contents of line
xshige	0:8eab2c229d83	1	#include "VS1002.h"
xshige	0:8eab2c229d83	2	#include "mbed.h"
xshige	0:8eab2c229d83	3
xshige	0:8eab2c229d83	4
xshige	0:8eab2c229d83	5	Serial pc(USBTX, USBRX);
xshige	0:8eab2c229d83	6
xshige	0:8eab2c229d83	7	/* ==================================================================
xshige	0:8eab2c229d83	8	* Constructor
xshige	0:8eab2c229d83	9	* =================================================================*/
xshige	0:8eab2c229d83	10	VS1002::VS1002(
xshige	0:8eab2c229d83	11	PinName mmosi, PinName mmiso, PinName ssck, PinName ccs, const char *name,
xshige	0:8eab2c229d83	12	PinName mosi, PinName miso, PinName sck, PinName cs, PinName rst,
xshige	0:8eab2c229d83	13	PinName dreq, PinName dcs, PinName vol)
xshige	0:8eab2c229d83	14	:
xshige	0:8eab2c229d83	15	_sd(mmosi, mmiso, ssck, ccs, name),
xshige	0:8eab2c229d83	16	_spi(mosi, miso, sck),
xshige	0:8eab2c229d83	17	_CS(cs),
xshige	0:8eab2c229d83	18	_RST(rst),
xshige	0:8eab2c229d83	19	_DREQ(dreq),
xshige	0:8eab2c229d83	20	_DCS(dcs),
xshige	0:8eab2c229d83	21	_VOL(vol) {
xshige	0:8eab2c229d83	22
xshige	0:8eab2c229d83	23	}
xshige	0:8eab2c229d83	24
xshige	0:8eab2c229d83	25	/*===================================================================
xshige	0:8eab2c229d83	26	* Functions
xshige	0:8eab2c229d83	27	==================================================================/
xshige	0:8eab2c229d83	28
xshige	0:8eab2c229d83	29	void VS1002::cs_low(void)
xshige	0:8eab2c229d83	30	{
xshige	0:8eab2c229d83	31	_CS = 0;
xshige	0:8eab2c229d83	32	}
xshige	0:8eab2c229d83	33	void VS1002::cs_high(void)
xshige	0:8eab2c229d83	34	{
xshige	0:8eab2c229d83	35	_CS = 1;
xshige	0:8eab2c229d83	36	}
xshige	0:8eab2c229d83	37	void VS1002::dcs_low(void)
xshige	0:8eab2c229d83	38	{
xshige	0:8eab2c229d83	39	_DCS = 0;
xshige	0:8eab2c229d83	40	}
xshige	0:8eab2c229d83	41	void VS1002::dcs_high(void)
xshige	0:8eab2c229d83	42	{
xshige	0:8eab2c229d83	43	_DCS = 1;
xshige	0:8eab2c229d83	44	}
xshige	0:8eab2c229d83	45	void VS1002::sci_en(void) //SCI enable
xshige	0:8eab2c229d83	46	{
xshige	0:8eab2c229d83	47	cs_high();
xshige	0:8eab2c229d83	48	dcs_high();
xshige	0:8eab2c229d83	49	cs_low();
xshige	0:8eab2c229d83	50	}
xshige	0:8eab2c229d83	51	void VS1002::sci_dis(void) //SCI disable
xshige	0:8eab2c229d83	52	{
xshige	0:8eab2c229d83	53	cs_high();
xshige	0:8eab2c229d83	54	}
xshige	0:8eab2c229d83	55	void VS1002::sdi_en(void) //SDI enable
xshige	0:8eab2c229d83	56	{
xshige	0:8eab2c229d83	57	dcs_high();
xshige	0:8eab2c229d83	58	cs_high();
xshige	0:8eab2c229d83	59	dcs_low();
xshige	0:8eab2c229d83	60	}
xshige	0:8eab2c229d83	61	void VS1002::sdi_dis(void) //SDI disable
xshige	0:8eab2c229d83	62	{
xshige	0:8eab2c229d83	63	dcs_high();
xshige	0:8eab2c229d83	64	}
xshige	0:8eab2c229d83	65	void VS1002::reset(void) //hardware reset
xshige	0:8eab2c229d83	66	{
xshige	0:8eab2c229d83	67	wait(0.01);
xshige	0:8eab2c229d83	68	_RST = 0;
xshige	0:8eab2c229d83	69	wait(0.01);
xshige	0:8eab2c229d83	70	_RST = 1;
xshige	0:8eab2c229d83	71	wait(0.10);
xshige	0:8eab2c229d83	72	}
xshige	0:8eab2c229d83	73	void VS1002::power_down(void) //hardware and software reset
xshige	0:8eab2c229d83	74	{
xshige	0:8eab2c229d83	75	cs_low();
xshige	0:8eab2c229d83	76	reset();
xshige	0:8eab2c229d83	77	sci_write(0x00, SM_PDOWN);
xshige	0:8eab2c229d83	78	wait(0.01);
xshige	0:8eab2c229d83	79	reset();
xshige	0:8eab2c229d83	80	}
xshige	0:8eab2c229d83	81	void VS1002::sci_initialise(void)
xshige	0:8eab2c229d83	82	{
xshige	0:8eab2c229d83	83	_RST = 1; //no reset
xshige	0:8eab2c229d83	84	_spi.format(8,0); //spi 8bit interface, steady state low
xshige	0:8eab2c229d83	85	_spi.frequency(1000000); //rising edge data record, freq. 1Mhz
xshige	0:8eab2c229d83	86
xshige	0:8eab2c229d83	87	cs_low();
xshige	0:8eab2c229d83	88	for(int i=0; i<4; i++)
xshige	0:8eab2c229d83	89	{
xshige	0:8eab2c229d83	90	_spi.write(0xFF); //clock the chip a bit
xshige	0:8eab2c229d83	91	}
xshige	0:8eab2c229d83	92	cs_high();
xshige	0:8eab2c229d83	93	dcs_high();
xshige	0:8eab2c229d83	94	wait_us(5);
xshige	0:8eab2c229d83	95	}
xshige	0:8eab2c229d83	96	void VS1002::sdi_initialise(void)
xshige	0:8eab2c229d83	97	{
xshige	0:8eab2c229d83	98	_spi.format(8,0);
xshige	0:8eab2c229d83	99	_spi.frequency(7000000); //set to 7MHz
xshige	0:8eab2c229d83	100
xshige	0:8eab2c229d83	101	cs_high();
xshige	0:8eab2c229d83	102	dcs_high();
xshige	0:8eab2c229d83	103	}
xshige	0:8eab2c229d83	104	void VS1002::sci_write(unsigned char address, unsigned short int data)
xshige	0:8eab2c229d83	105	{
xshige	0:8eab2c229d83	106	sci_en(); //enables SCI/disables SDI
xshige	0:8eab2c229d83	107
xshige	0:8eab2c229d83	108	while(!_DREQ); //wait unitl data request is high
xshige	0:8eab2c229d83	109	_spi.write(0x02); //SCI write
xshige	0:8eab2c229d83	110	_spi.write(address); //register address
xshige	0:8eab2c229d83	111	_spi.write((data >> 8) & 0xFF); //write out first half of data word
xshige	0:8eab2c229d83	112	_spi.write(data & 0xFF); //write out second half of data word
xshige	0:8eab2c229d83	113
xshige	0:8eab2c229d83	114	sci_dis(); //enables SDI/disables SCI
xshige	0:8eab2c229d83	115	wait_us(5);
xshige	0:8eab2c229d83	116	}
xshige	0:8eab2c229d83	117	void VS1002::sdi_write(unsigned char datum)
xshige	0:8eab2c229d83	118	{
xshige	0:8eab2c229d83	119	sdi_en();
xshige	0:8eab2c229d83	120
xshige	0:8eab2c229d83	121	while(!_DREQ);
xshige	0:8eab2c229d83	122	_spi.write(datum);
xshige	0:8eab2c229d83	123
xshige	0:8eab2c229d83	124	sci_dis();
xshige	0:8eab2c229d83	125	}
xshige	0:8eab2c229d83	126	unsigned short int VS1002::read(unsigned short int address)
xshige	0:8eab2c229d83	127	{
xshige	0:8eab2c229d83	128	cs_low(); //enables SCI/disables SDI
xshige	0:8eab2c229d83	129
xshige	0:8eab2c229d83	130	while(!_DREQ); //wait unitl data request is high
xshige	0:8eab2c229d83	131	_spi.write(0x03); //SCI write
xshige	0:8eab2c229d83	132	_spi.write(address); //register address
xshige	0:8eab2c229d83	133	unsigned short int received = _spi.write(0x00); //write out dummy byte
xshige	0:8eab2c229d83	134	received <<= 8;
xshige	0:8eab2c229d83	135	received += _spi.write(0x00); //write out dummy byte
xshige	0:8eab2c229d83	136
xshige	0:8eab2c229d83	137	cs_high(); //enables SDI/disables SCI
xshige	0:8eab2c229d83	138
xshige	0:8eab2c229d83	139	return received; //return received word
xshige	0:8eab2c229d83	140	}
xshige	0:8eab2c229d83	141	void VS1002::sine_test_activate(unsigned char wave)
xshige	0:8eab2c229d83	142	{
xshige	0:8eab2c229d83	143	cs_high(); //enables SDI/disables SCI
xshige	0:8eab2c229d83	144
xshige	0:8eab2c229d83	145	while(!_DREQ); //wait unitl data request is high
xshige	0:8eab2c229d83	146	_spi.write(0x53); //SDI write
xshige	0:8eab2c229d83	147	_spi.write(0xEF); //SDI write
xshige	0:8eab2c229d83	148	_spi.write(0x6E); //SDI write
xshige	0:8eab2c229d83	149	_spi.write(wave); //SDI write
xshige	0:8eab2c229d83	150	_spi.write(0x00); //filler byte
xshige	0:8eab2c229d83	151	_spi.write(0x00); //filler byte
xshige	0:8eab2c229d83	152	_spi.write(0x00); //filler byte
xshige	0:8eab2c229d83	153	_spi.write(0x00); //filler byte
xshige	0:8eab2c229d83	154
xshige	0:8eab2c229d83	155	cs_low(); //enables SCI/disables SDI
xshige	0:8eab2c229d83	156	}
xshige	0:8eab2c229d83	157	void VS1002::sine_test_deactivate(void)
xshige	0:8eab2c229d83	158	{
xshige	0:8eab2c229d83	159	cs_high();
xshige	0:8eab2c229d83	160
xshige	0:8eab2c229d83	161	while(!_DREQ);
xshige	0:8eab2c229d83	162	_spi.write(0x45); //SDI write
xshige	0:8eab2c229d83	163	_spi.write(0x78); //SDI write
xshige	0:8eab2c229d83	164	_spi.write(0x69); //SDI write
xshige	0:8eab2c229d83	165	_spi.write(0x74); //SDI write
xshige	0:8eab2c229d83	166	_spi.write(0x00); //filler byte
xshige	0:8eab2c229d83	167	_spi.write(0x00); //filler byte
xshige	0:8eab2c229d83	168	_spi.write(0x00); //filler byte
xshige	0:8eab2c229d83	169	_spi.write(0x00); //filler byte
xshige	0:8eab2c229d83	170	}
xshige	0:8eab2c229d83	171	void VS1002::volume(void)
xshige	0:8eab2c229d83	172	{
xshige	0:8eab2c229d83	173	#ifdef FIXED_VOL
xshige	0:8eab2c229d83	174	unsigned char volumize = (0 * 255); // FIXED VOL (not support volume input)
xshige	0:8eab2c229d83	175	#else
xshige	0:8eab2c229d83	176	unsigned char volumize = (_VOL * 255);
xshige	0:8eab2c229d83	177	#endif
xshige	0:8eab2c229d83	178	while(!_DREQ);
xshige	0:8eab2c229d83	179
xshige	0:8eab2c229d83	180	unsigned short int attenuation = ((256 * volumize) + volumize);
xshige	0:8eab2c229d83	181	sci_write(0x0B, attenuation);
xshige	0:8eab2c229d83	182	}
xshige	0:8eab2c229d83	183
xshige	0:8eab2c229d83	184	void VS1002::play_song(int song_number)
xshige	0:8eab2c229d83	185	{
xshige	0:8eab2c229d83	186	/====== Song Select ======/
xshige	0:8eab2c229d83	187
xshige	0:8eab2c229d83	188	// char list[10000] = {0};
xshige	0:8eab2c229d83	189	char list[1000] = {0};
xshige	0:8eab2c229d83	190	char str[16] = {"/sd/"};
xshige	0:8eab2c229d83	191	unsigned int startplace = 0;
xshige	0:8eab2c229d83	192	unsigned int endplace = 0;
xshige	0:8eab2c229d83	193	unsigned int play = 0;
xshige	0:8eab2c229d83	194	num_of_files = 0;
xshige	0:8eab2c229d83	195
xshige	0:8eab2c229d83	196	DIR *d;
xshige	0:8eab2c229d83	197	struct dirent *p;
xshige	0:8eab2c229d83	198	d = opendir("/sd");
xshige	0:8eab2c229d83	199	if(d != NULL)
xshige	0:8eab2c229d83	200	{
xshige	0:8eab2c229d83	201	while((p = readdir(d)) != NULL)
xshige	0:8eab2c229d83	202	{
xshige	0:8eab2c229d83	203	strcat(list, "*");
xshige	0:8eab2c229d83	204	strcat(list, p->d_name);
xshige	0:8eab2c229d83	205	num_of_files++;
xshige	0:8eab2c229d83	206	}
xshige	0:8eab2c229d83	207	}
xshige	0:8eab2c229d83	208	else
xshige	0:8eab2c229d83	209	{
xshige	0:8eab2c229d83	210	perror("Could not open directory!");
xshige	0:8eab2c229d83	211	}
xshige	0:8eab2c229d83	212	strcat(list, ""); //terminating
xshige	0:8eab2c229d83	213	if(num_of_files < song_number)
xshige	0:8eab2c229d83	214	{
xshige	0:8eab2c229d83	215	return;
xshige	0:8eab2c229d83	216	}
xshige	0:8eab2c229d83	217	while(play != song_number)
xshige	0:8eab2c229d83	218	{
xshige	0:8eab2c229d83	219	char symbol = list[startplace];
xshige	0:8eab2c229d83	220	startplace++;
xshige	0:8eab2c229d83	221	if(symbol == 0x2A) //0x2A = "*"
xshige	0:8eab2c229d83	222	{
xshige	0:8eab2c229d83	223	play++;
xshige	0:8eab2c229d83	224	}
xshige	0:8eab2c229d83	225	}
xshige	0:8eab2c229d83	226	play = 0;
xshige	0:8eab2c229d83	227	while(play != (song_number+1))
xshige	0:8eab2c229d83	228	{
xshige	0:8eab2c229d83	229	char symbol = list[endplace];
xshige	0:8eab2c229d83	230	endplace++;
xshige	0:8eab2c229d83	231	if(symbol == 0x2A) //0x2A = "*"
xshige	0:8eab2c229d83	232	{
xshige	0:8eab2c229d83	233	play++;
xshige	0:8eab2c229d83	234	}
xshige	0:8eab2c229d83	235	}
xshige	0:8eab2c229d83	236
xshige	0:8eab2c229d83	237	strncat(str, &list[startplace], endplace-startplace);
xshige	0:8eab2c229d83	238	str[(endplace-startplace)+3] = '\0';
xshige	0:8eab2c229d83	239
xshige	0:8eab2c229d83	240	//printf("list: %s\r\n",list); //debug
xshige	0:8eab2c229d83	241
xshige	0:8eab2c229d83	242	/====== File Transfer ======/
xshige	0:8eab2c229d83	243
xshige	0:8eab2c229d83	244	// return if not MP3 file
xshige	0:8eab2c229d83	245	if (!((strstr(str,"MP3")!=NULL)\|\|(strstr(str,"mp3")!=NULL))) return;
xshige	0:8eab2c229d83	246	// display filename.mp3
xshige	0:8eab2c229d83	247	printf("Now Playing: %s\r\n",str);
xshige	0:8eab2c229d83	248
xshige	0:8eab2c229d83	249	FILE *song;
xshige	0:8eab2c229d83	250	unsigned char array[512];
xshige	0:8eab2c229d83	251
xshige	0:8eab2c229d83	252	song = fopen(str, "rb");
xshige	0:8eab2c229d83	253
xshige	0:8eab2c229d83	254	if(!song)
xshige	0:8eab2c229d83	255	{
xshige	0:8eab2c229d83	256	exit(1);
xshige	0:8eab2c229d83	257	}
xshige	0:8eab2c229d83	258
xshige	0:8eab2c229d83	259	while(!feof(song))
xshige	0:8eab2c229d83	260	{
xshige	0:8eab2c229d83	261	fread(&array, 1, 512, song);
xshige	0:8eab2c229d83	262	for(int i=0; i<512; i++)
xshige	0:8eab2c229d83	263	{
xshige	0:8eab2c229d83	264	#ifndef FS_ONLY
xshige	0:8eab2c229d83	265	sdi_write(array[i]);
xshige	0:8eab2c229d83	266	// printf(".");
xshige	0:8eab2c229d83	267	#endif
xshige	0:8eab2c229d83	268	}
xshige	0:8eab2c229d83	269	#ifndef FS_ONLY
xshige	0:8eab2c229d83	270	volume();
xshige	0:8eab2c229d83	271	#endif
xshige	0:8eab2c229d83	272	}
xshige	0:8eab2c229d83	273	for(int n=0; n<2048; n++)
xshige	0:8eab2c229d83	274	{
xshige	0:8eab2c229d83	275	#ifndef FS_ONLY
xshige	0:8eab2c229d83	276	sdi_write(0x00);
xshige	0:8eab2c229d83	277	#endif
xshige	0:8eab2c229d83	278	}
xshige	0:8eab2c229d83	279	fclose(song); //close the file
xshige	0:8eab2c229d83	280	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	03 Oct 2010
Imports:	88
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	2
Followers:	2

VS1002.cpp@0:8eab2c229d83, 2010-10-03 (annotated)

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