lab3_Radio_design - This program plays an internet radio audio stream…

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Parikshit Massand / Mbed 2 deprecated lab3_Radio_design

This program plays an internet radio audio stream like Shoutcast.

Dependencies: EthernetNetIf mbed HTTPClient

VS1002.cpp@0:37da71b87d96, 2011-03-01 (annotated)

Committer:: parik
Date:: Tue Mar 01 06:22:50 2011 +0000
Revision:: 0:37da71b87d96

Who changed what in which revision?

User	Revision	Line number	New contents of line
parik	0:37da71b87d96	1
parik	0:37da71b87d96	2
parik	0:37da71b87d96	3	#include "VS1002.h"
parik	0:37da71b87d96	4	#include "mbed.h"
parik	0:37da71b87d96	5	#include "MSCFileSystem.h"
parik	0:37da71b87d96	6
parik	0:37da71b87d96	7
parik	0:37da71b87d96	8	/* ==================================================================
parik	0:37da71b87d96	9	* Constructor
parik	0:37da71b87d96	10	* =================================================================*/
parik	0:37da71b87d96	11
parik	0:37da71b87d96	12	VS1002::VS1002(PinName mosi, PinName miso, PinName sck, PinName cs, PinName rst, PinName dreq, PinName dcs, PinName vol)
parik	0:37da71b87d96	13	:_spi(mosi, miso, sck), _CS(cs), _RST(rst), _DREQ(dreq), _DCS(dcs), _VOL(vol)
parik	0:37da71b87d96	14	{
parik	0:37da71b87d96	15
parik	0:37da71b87d96	16	}
parik	0:37da71b87d96	17
parik	0:37da71b87d96	18
parik	0:37da71b87d96	19	/*===================================================================
parik	0:37da71b87d96	20	* Functions
parik	0:37da71b87d96	21	==================================================================/
parik	0:37da71b87d96	22
parik	0:37da71b87d96	23	void VS1002::cs_low(void)
parik	0:37da71b87d96	24	{
parik	0:37da71b87d96	25	_CS = 0;
parik	0:37da71b87d96	26	}
parik	0:37da71b87d96	27	void VS1002::cs_high(void)
parik	0:37da71b87d96	28	{
parik	0:37da71b87d96	29	_CS = 1;
parik	0:37da71b87d96	30	}
parik	0:37da71b87d96	31	void VS1002::dcs_low(void)
parik	0:37da71b87d96	32	{
parik	0:37da71b87d96	33	_DCS = 0;
parik	0:37da71b87d96	34	}
parik	0:37da71b87d96	35	void VS1002::dcs_high(void)
parik	0:37da71b87d96	36	{
parik	0:37da71b87d96	37	_DCS = 1;
parik	0:37da71b87d96	38	}
parik	0:37da71b87d96	39	void VS1002::sci_en(void) //SCI enable
parik	0:37da71b87d96	40	{
parik	0:37da71b87d96	41	cs_high();
parik	0:37da71b87d96	42	dcs_high();
parik	0:37da71b87d96	43	cs_low();
parik	0:37da71b87d96	44	}
parik	0:37da71b87d96	45	void VS1002::sci_dis(void) //SCI disable
parik	0:37da71b87d96	46	{
parik	0:37da71b87d96	47	cs_high();
parik	0:37da71b87d96	48	}
parik	0:37da71b87d96	49	void VS1002::sdi_en(void) //SDI enable
parik	0:37da71b87d96	50	{
parik	0:37da71b87d96	51	dcs_high();
parik	0:37da71b87d96	52	cs_high();
parik	0:37da71b87d96	53	dcs_low();
parik	0:37da71b87d96	54	}
parik	0:37da71b87d96	55	void VS1002::sdi_dis(void) //SDI disable
parik	0:37da71b87d96	56	{
parik	0:37da71b87d96	57	dcs_high();
parik	0:37da71b87d96	58	}
parik	0:37da71b87d96	59	void VS1002::reset(void) //hardware reset
parik	0:37da71b87d96	60	{
parik	0:37da71b87d96	61	wait(0.01);
parik	0:37da71b87d96	62	_RST = 0;
parik	0:37da71b87d96	63	wait(0.01);
parik	0:37da71b87d96	64	_RST = 1;
parik	0:37da71b87d96	65	wait(0.10);
parik	0:37da71b87d96	66	}
parik	0:37da71b87d96	67	void VS1002::power_down(void) //hardware and software reset
parik	0:37da71b87d96	68	{
parik	0:37da71b87d96	69	cs_low();
parik	0:37da71b87d96	70	reset();
parik	0:37da71b87d96	71	sci_write(0x00, SM_PDOWN);
parik	0:37da71b87d96	72	wait(0.01);
parik	0:37da71b87d96	73	reset();
parik	0:37da71b87d96	74	}
parik	0:37da71b87d96	75	void VS1002::sci_initialise(void)
parik	0:37da71b87d96	76	{
parik	0:37da71b87d96	77	_RST = 1; //no reset
parik	0:37da71b87d96	78	_spi.format(8,0); //spi 8bit interface, steady state low
parik	0:37da71b87d96	79	_spi.frequency(1000000); //rising edge data record, freq. 1Mhz
parik	0:37da71b87d96	80
parik	0:37da71b87d96	81	cs_low();
parik	0:37da71b87d96	82	for(int i=0; i<4; i++)
parik	0:37da71b87d96	83	{
parik	0:37da71b87d96	84	_spi.write(0xFF); //clock the chip a bit
parik	0:37da71b87d96	85	}
parik	0:37da71b87d96	86	cs_high();
parik	0:37da71b87d96	87	dcs_high();
parik	0:37da71b87d96	88	wait_us(5);
parik	0:37da71b87d96	89	}
parik	0:37da71b87d96	90	void VS1002::sdi_initialise(void)
parik	0:37da71b87d96	91	{
parik	0:37da71b87d96	92	_spi.format(8,0);
parik	0:37da71b87d96	93	_spi.frequency(7000000); //set to 7MHz
parik	0:37da71b87d96	94
parik	0:37da71b87d96	95	cs_high();
parik	0:37da71b87d96	96	dcs_high();
parik	0:37da71b87d96	97	}
parik	0:37da71b87d96	98	void VS1002::sci_write(unsigned char address, unsigned short int data)
parik	0:37da71b87d96	99	{
parik	0:37da71b87d96	100	sci_en(); //enables SCI/disables SDI
parik	0:37da71b87d96	101
parik	0:37da71b87d96	102	while(!_DREQ); //wait unitl data request is high
parik	0:37da71b87d96	103	_spi.write(0x02); //SCI write
parik	0:37da71b87d96	104	_spi.write(address); //register address
parik	0:37da71b87d96	105	_spi.write((data >> 8) & 0xFF); //write out first half of data word
parik	0:37da71b87d96	106	_spi.write(data & 0xFF); //write out second half of data word
parik	0:37da71b87d96	107
parik	0:37da71b87d96	108	sci_dis(); //enables SDI/disables SCI
parik	0:37da71b87d96	109	wait_us(5);
parik	0:37da71b87d96	110	}
parik	0:37da71b87d96	111	void VS1002::sdi_write(unsigned char datum)
parik	0:37da71b87d96	112	{
parik	0:37da71b87d96	113	sdi_en();
parik	0:37da71b87d96	114
parik	0:37da71b87d96	115	while(!_DREQ);
parik	0:37da71b87d96	116	_spi.write(datum);
parik	0:37da71b87d96	117
parik	0:37da71b87d96	118	sci_dis();
parik	0:37da71b87d96	119	}
parik	0:37da71b87d96	120	unsigned short int VS1002::read(unsigned short int address)
parik	0:37da71b87d96	121	{
parik	0:37da71b87d96	122	cs_low(); //enables SCI/disables SDI
parik	0:37da71b87d96	123
parik	0:37da71b87d96	124	while(!_DREQ); //wait unitl data request is high
parik	0:37da71b87d96	125	_spi.write(0x03); //SCI write
parik	0:37da71b87d96	126	_spi.write(address); //register address
parik	0:37da71b87d96	127	unsigned short int received = _spi.write(0x00); //write out dummy byte
parik	0:37da71b87d96	128	received <<= 8;
parik	0:37da71b87d96	129	received += _spi.write(0x00); //write out dummy byte
parik	0:37da71b87d96	130
parik	0:37da71b87d96	131	cs_high(); //enables SDI/disables SCI
parik	0:37da71b87d96	132
parik	0:37da71b87d96	133	return received; //return received word
parik	0:37da71b87d96	134	}
parik	0:37da71b87d96	135	void VS1002::sine_test_activate(unsigned char wave)
parik	0:37da71b87d96	136	{
parik	0:37da71b87d96	137	cs_high(); //enables SDI/disables SCI
parik	0:37da71b87d96	138
parik	0:37da71b87d96	139	while(!_DREQ); //wait unitl data request is high
parik	0:37da71b87d96	140	_spi.write(0x53); //SDI write
parik	0:37da71b87d96	141	_spi.write(0xEF); //SDI write
parik	0:37da71b87d96	142	_spi.write(0x6E); //SDI write
parik	0:37da71b87d96	143	_spi.write(wave); //SDI write
parik	0:37da71b87d96	144	_spi.write(0x00); //filler byte
parik	0:37da71b87d96	145	_spi.write(0x00); //filler byte
parik	0:37da71b87d96	146	_spi.write(0x00); //filler byte
parik	0:37da71b87d96	147	_spi.write(0x00); //filler byte
parik	0:37da71b87d96	148
parik	0:37da71b87d96	149	cs_low(); //enables SCI/disables SDI
parik	0:37da71b87d96	150	}
parik	0:37da71b87d96	151	void VS1002::sine_test_deactivate(void)
parik	0:37da71b87d96	152	{
parik	0:37da71b87d96	153	cs_high();
parik	0:37da71b87d96	154
parik	0:37da71b87d96	155	while(!_DREQ);
parik	0:37da71b87d96	156	_spi.write(0x45); //SDI write
parik	0:37da71b87d96	157	_spi.write(0x78); //SDI write
parik	0:37da71b87d96	158	_spi.write(0x69); //SDI write
parik	0:37da71b87d96	159	_spi.write(0x74); //SDI write
parik	0:37da71b87d96	160	_spi.write(0x00); //filler byte
parik	0:37da71b87d96	161	_spi.write(0x00); //filler byte
parik	0:37da71b87d96	162	_spi.write(0x00); //filler byte
parik	0:37da71b87d96	163	_spi.write(0x00); //filler byte
parik	0:37da71b87d96	164	}
parik	0:37da71b87d96	165	void VS1002::volume(void)
parik	0:37da71b87d96	166	{
parik	0:37da71b87d96	167	unsigned char volumize = (_VOL * 255);
parik	0:37da71b87d96	168	while(!_DREQ);
parik	0:37da71b87d96	169
parik	0:37da71b87d96	170	unsigned short int attenuation = ((256 * volumize) + volumize);
parik	0:37da71b87d96	171	sci_write(0x0B, attenuation);
parik	0:37da71b87d96	172	}
parik	0:37da71b87d96	173
parik	0:37da71b87d96	174
parik	0:37da71b87d96	175	//Play the mp3 file from the USB filesystem (stream.mp3 on usb system)
parik	0:37da71b87d96	176	void VS1002::play_song()
parik	0:37da71b87d96	177	{
parik	0:37da71b87d96	178
parik	0:37da71b87d96	179
parik	0:37da71b87d96	180	/====== File Transfer ======/
parik	0:37da71b87d96	181
parik	0:37da71b87d96	182	FILE *song;
parik	0:37da71b87d96	183	unsigned char array[512];
parik	0:37da71b87d96	184	song = fopen("/msc/stream.mp3", "rb");
parik	0:37da71b87d96	185
parik	0:37da71b87d96	186	if(!song)
parik	0:37da71b87d96	187	{
parik	0:37da71b87d96	188	exit(1);
parik	0:37da71b87d96	189	}
parik	0:37da71b87d96	190
parik	0:37da71b87d96	191	while(!feof(song))
parik	0:37da71b87d96	192	{
parik	0:37da71b87d96	193	fread(&array, 1, 512, song);
parik	0:37da71b87d96	194	for(int i=0; i<512; i++)
parik	0:37da71b87d96	195	{
parik	0:37da71b87d96	196	sdi_write(array[i]);
parik	0:37da71b87d96	197	}
parik	0:37da71b87d96	198	volume();
parik	0:37da71b87d96	199	}
parik	0:37da71b87d96	200	for(int n=0; n<2048; n++)
parik	0:37da71b87d96	201	{
parik	0:37da71b87d96	202	sdi_write(0x00);
parik	0:37da71b87d96	203	}
parik	0:37da71b87d96	204	fclose(song);
parik	0:37da71b87d96	205
parik	0:37da71b87d96	206
parik	0:37da71b87d96	207	}
parik	0:37da71b87d96	208

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	01 Mar 2011
Imports:	110
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	3
Followers:	5

VS1002.cpp@0:37da71b87d96, 2011-03-01 (annotated)

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