WIZnet / Mbed 2 deprecated MP3Decoding_VS1002_WIZwiki-W7500

Playing MP3 with Music Shield and WIZwiki-W7500

Dependencies:   FTPClient javakysSDFileSystem2 WIZnetInterface mbed

Prerequisite

This example is for playing MP3 file stored in SD card on WIZwiki-W7500 and updating MP3 files from server to SD card via FTP protocol.

To implement this function, you need a Platform board, network Interface board, MP3 decoder board and SD card. Below are what we used.

  • WIZwiki-W7500 from WIZnet (Platform board and Ethernet I/F board)
  • Music shield from Seeed Studio
  • SD card

Hardware Configuration

WIZwiki-W7500 Pin map

pin map

SPI1 for SD Card
SPI1 on WIZwiki-W7100 is for reading from or writing to SD card and pins for SPI1 are PB_0, PB_1, PB_2 and PB_3.

SPI0 and other control pins for MP3 decoder
WIZwiki-W7500 communicates to MP3 decoder on Music Shield via SPI0 pins of which consists of PC_12, D11, D12 and D13. And PC_13, PC_14 and PC-15 are used for DCS, DREQ and RST, respectively.

InterruptIn pins for 5-Way Navigation Switch
D3, D4, D5, D6 and D7 are connected to 5 way navigation switch on Music Shield. When user pushes the switch to one way, a relevant pin is grounded so that he or she should make it set high at the beginning.

Software

SPI Initialization

//Declaration in VS1002.cpp
VS1002::VS1002(PinName mmosi, PinName mmiso, PinName ssck, PinName ccs, const char *name, PinName mosi, PinName miso, PinName sck, PinName cs, PinName rst, PinName dreq, PinName dcs)
    : _DREQ(dreq), _RST(rst), _spi(mosi, miso, sck), _CS(cs), _DCS(dcs), _sd(mmosi, mmiso, ssck, ccs, name) {
    
    }    

//Initialization in main.cpp
VS1002 mp3(PB_3, PB_2, PB_1, PB_0,"sdc",D11, D12 ,D13, PC_12, PC_15, PC_14, PC_13);

Mapping 5-Way Navigation Switch into InterruptIn pins

main.cpp

InterruptIn K_VU(D3); // Volume UP Key
InterruptIn K_VD(D7); // Volume Down Key
InterruptIn K_FW(D4); // Foward Key
InterruptIn K_BW(D6); // Backward Key
InterruptIn K_ONOFF(D5); //Play/Resume or Pause Key

Additional codes due to mbed library bug of WIZwiki-W7500

main.cpp

//Operating Clock Frequency Set
*(volatile uint32_t *)(0x41001014) = 0x0060100;

//Set all InterruptIn pins to Internal PullUp
*(volatile uint32_t *)(0x41003000) = 0x00000002; //D6
*(volatile uint32_t *)(0x41003004) = 0x00000002; //D5
*(volatile uint32_t *)(0x41003008) = 0x00000002;  //D4
*(volatile uint32_t *)(0x41003080) = 0x00000002;  //D3
*(volatile uint32_t *)(0x41003098) = 0x00000002;  //D7

Caution

This example can play only MP3 files with up to 192KHz sample rate//

VS1002.cpp@2:cea9f6564641, 2017-03-30 (annotated)

Committer:
javakys
Date:
Thu Mar 30 10:29:51 2017 +0000
Revision:
2:cea9f6564641
Parent:
1:fc4e0c572992 
Function Description Update

Who changed what in which revision?

UserRevisionLine numberNew contents of line
javakys 1:fc4e0c572992 1 #include "VS1002.h"
javakys 1:fc4e0c572992 2 #include "mbed.h"
javakys 1:fc4e0c572992 3
javakys 1:fc4e0c572992 4 Serial pc(USBTX, USBRX);
javakys 1:fc4e0c572992 5
javakys 1:fc4e0c572992 6 /* ==================================================================
javakys 1:fc4e0c572992 7 * Constructor
javakys 1:fc4e0c572992 8 * =================================================================*/
javakys 1:fc4e0c572992 9
javakys 1:fc4e0c572992 10 VS1002::VS1002(PinName mmosi, PinName mmiso, PinName ssck, PinName ccs, const char *name, PinName mosi, PinName miso, PinName sck, PinName cs, PinName rst, PinName dreq, PinName dcs)
javakys 1:fc4e0c572992 11 : _DREQ(dreq), _RST(rst), _spi(mosi, miso, sck), _CS(cs), _DCS(dcs), _sd(mmosi, mmiso, ssck, ccs, name) {
javakys 1:fc4e0c572992 12
javakys 1:fc4e0c572992 13 }
javakys 1:fc4e0c572992 14
javakys 1:fc4e0c572992 15 /*===================================================================
javakys 1:fc4e0c572992 16 * Functions
javakys 1:fc4e0c572992 17 *==================================================================*/
javakys 1:fc4e0c572992 18
javakys 1:fc4e0c572992 19 void VS1002::cs_low(void)
javakys 1:fc4e0c572992 20 {
javakys 1:fc4e0c572992 21 _CS = 0;
javakys 1:fc4e0c572992 22 }
javakys 1:fc4e0c572992 23 void VS1002::cs_high(void)
javakys 1:fc4e0c572992 24 {
javakys 1:fc4e0c572992 25 _CS = 1;
javakys 1:fc4e0c572992 26 }
javakys 1:fc4e0c572992 27 void VS1002::dcs_low(void)
javakys 1:fc4e0c572992 28 {
javakys 1:fc4e0c572992 29 _DCS = 0;
javakys 1:fc4e0c572992 30 }
javakys 1:fc4e0c572992 31 void VS1002::dcs_high(void)
javakys 1:fc4e0c572992 32 {
javakys 1:fc4e0c572992 33 _DCS = 1;
javakys 1:fc4e0c572992 34 }
javakys 1:fc4e0c572992 35 void VS1002::sci_en(void) //SCI enable
javakys 1:fc4e0c572992 36 {
javakys 1:fc4e0c572992 37 cs_high();
javakys 1:fc4e0c572992 38 dcs_high();
javakys 1:fc4e0c572992 39 cs_low();
javakys 1:fc4e0c572992 40 }
javakys 1:fc4e0c572992 41 void VS1002::sci_dis(void) //SCI disable
javakys 1:fc4e0c572992 42 {
javakys 1:fc4e0c572992 43 cs_high();
javakys 1:fc4e0c572992 44 }
javakys 1:fc4e0c572992 45 void VS1002::sdi_en(void) //SDI enable
javakys 1:fc4e0c572992 46 {
javakys 1:fc4e0c572992 47 dcs_high();
javakys 1:fc4e0c572992 48 cs_high();
javakys 1:fc4e0c572992 49 dcs_low();
javakys 1:fc4e0c572992 50 }
javakys 1:fc4e0c572992 51 void VS1002::sdi_dis(void) //SDI disable
javakys 1:fc4e0c572992 52 {
javakys 1:fc4e0c572992 53 dcs_high();
javakys 1:fc4e0c572992 54 }
javakys 1:fc4e0c572992 55 void VS1002::reset(void) //hardware reset
javakys 1:fc4e0c572992 56 {
javakys 1:fc4e0c572992 57 wait(0.01);
javakys 1:fc4e0c572992 58 _RST = 0;
javakys 1:fc4e0c572992 59 wait(0.01);
javakys 1:fc4e0c572992 60 _RST = 1;
javakys 1:fc4e0c572992 61 wait(0.10);
javakys 1:fc4e0c572992 62 }
javakys 1:fc4e0c572992 63 void VS1002::power_down(void) //hardware and software reset
javakys 1:fc4e0c572992 64 {
javakys 1:fc4e0c572992 65 cs_low();
javakys 1:fc4e0c572992 66 reset();
javakys 1:fc4e0c572992 67 sci_write(0x00, SM_PDOWN);
javakys 1:fc4e0c572992 68 wait(0.01);
javakys 1:fc4e0c572992 69 reset();
javakys 1:fc4e0c572992 70 }
javakys 1:fc4e0c572992 71 void VS1002::sci_initialise(void)
javakys 1:fc4e0c572992 72 {
javakys 1:fc4e0c572992 73 _RST = 1; //no reset
javakys 1:fc4e0c572992 74 _spi.format(8,0); //spi 8bit interface, steady state low
javakys 1:fc4e0c572992 75 _spi.frequency(2000000); //rising edge data record, freq. 1Mhz
javakys 1:fc4e0c572992 76
javakys 1:fc4e0c572992 77 cs_low();
javakys 1:fc4e0c572992 78 for(int i=0; i<4; i++)
javakys 1:fc4e0c572992 79 {
javakys 1:fc4e0c572992 80 _spi.write(0xFF); //clock the chip a bit
javakys 1:fc4e0c572992 81 }
javakys 1:fc4e0c572992 82 cs_high();
javakys 1:fc4e0c572992 83 dcs_high();
javakys 1:fc4e0c572992 84 wait_us(5);
javakys 1:fc4e0c572992 85 }
javakys 1:fc4e0c572992 86 void VS1002::sdi_initialise(void)
javakys 1:fc4e0c572992 87 {
javakys 1:fc4e0c572992 88 _spi.format(8,0);
javakys 1:fc4e0c572992 89 _spi.frequency(7000000); //set to 7MHz
javakys 1:fc4e0c572992 90
javakys 1:fc4e0c572992 91 cs_high();
javakys 1:fc4e0c572992 92 dcs_high();
javakys 1:fc4e0c572992 93 }
javakys 1:fc4e0c572992 94 void VS1002::sci_write(unsigned char address, unsigned short int data)
javakys 1:fc4e0c572992 95 {
javakys 1:fc4e0c572992 96 sci_en(); //enables SCI/disables SDI
javakys 1:fc4e0c572992 97
javakys 1:fc4e0c572992 98 while(!_DREQ); //wait unitl data request is high
javakys 1:fc4e0c572992 99 _spi.write(0x02); //SCI write
javakys 1:fc4e0c572992 100 _spi.write(address); //register address
javakys 1:fc4e0c572992 101 _spi.write((data >> 8) & 0xFF); //write out first half of data word
javakys 1:fc4e0c572992 102 _spi.write(data & 0xFF); //write out second half of data word
javakys 1:fc4e0c572992 103
javakys 1:fc4e0c572992 104 sci_dis(); //enables SDI/disables SCI
javakys 1:fc4e0c572992 105 wait_us(5);
javakys 1:fc4e0c572992 106 }
javakys 1:fc4e0c572992 107 void VS1002::sdi_write(unsigned char datum)
javakys 1:fc4e0c572992 108 {
javakys 1:fc4e0c572992 109 sdi_en();
javakys 1:fc4e0c572992 110
javakys 1:fc4e0c572992 111 while(!_DREQ);
javakys 1:fc4e0c572992 112 _spi.write(datum);
javakys 1:fc4e0c572992 113
javakys 1:fc4e0c572992 114 sci_dis();
javakys 1:fc4e0c572992 115 }
javakys 1:fc4e0c572992 116 unsigned short int VS1002::read(unsigned short int address)
javakys 1:fc4e0c572992 117 {
javakys 1:fc4e0c572992 118 cs_low(); //enables SCI/disables SDI
javakys 1:fc4e0c572992 119
javakys 1:fc4e0c572992 120 while(!_DREQ); //wait unitl data request is high
javakys 1:fc4e0c572992 121 _spi.write(0x03); //SCI write
javakys 1:fc4e0c572992 122 _spi.write(address); //register address
javakys 1:fc4e0c572992 123 unsigned short int received = _spi.write(0x00); //write out dummy byte
javakys 1:fc4e0c572992 124 received <<= 8;
javakys 1:fc4e0c572992 125 received += _spi.write(0x00); //write out dummy byte
javakys 1:fc4e0c572992 126
javakys 1:fc4e0c572992 127 cs_high(); //enables SDI/disables SCI
javakys 1:fc4e0c572992 128
javakys 1:fc4e0c572992 129 return received; //return received word
javakys 1:fc4e0c572992 130 }
javakys 1:fc4e0c572992 131 void VS1002::sine_test_activate(unsigned char wave)
javakys 1:fc4e0c572992 132 {
javakys 1:fc4e0c572992 133 cs_high(); //enables SDI/disables SCI
javakys 1:fc4e0c572992 134
javakys 1:fc4e0c572992 135 while(!_DREQ); //wait unitl data request is high
javakys 1:fc4e0c572992 136 _spi.write(0x53); //SDI write
javakys 1:fc4e0c572992 137 _spi.write(0xEF); //SDI write
javakys 1:fc4e0c572992 138 _spi.write(0x6E); //SDI write
javakys 1:fc4e0c572992 139 _spi.write(wave); //SDI write
javakys 1:fc4e0c572992 140 _spi.write(0x00); //filler byte
javakys 1:fc4e0c572992 141 _spi.write(0x00); //filler byte
javakys 1:fc4e0c572992 142 _spi.write(0x00); //filler byte
javakys 1:fc4e0c572992 143 _spi.write(0x00); //filler byte
javakys 1:fc4e0c572992 144
javakys 1:fc4e0c572992 145 cs_low(); //enables SCI/disables SDI
javakys 1:fc4e0c572992 146 }
javakys 1:fc4e0c572992 147 void VS1002::sine_test_deactivate(void)
javakys 1:fc4e0c572992 148 {
javakys 1:fc4e0c572992 149 cs_high();
javakys 1:fc4e0c572992 150
javakys 1:fc4e0c572992 151 while(!_DREQ);
javakys 1:fc4e0c572992 152 _spi.write(0x45); //SDI write
javakys 1:fc4e0c572992 153 _spi.write(0x78); //SDI write
javakys 1:fc4e0c572992 154 _spi.write(0x69); //SDI write
javakys 1:fc4e0c572992 155 _spi.write(0x74); //SDI write
javakys 1:fc4e0c572992 156 _spi.write(0x00); //filler byte
javakys 1:fc4e0c572992 157 _spi.write(0x00); //filler byte
javakys 1:fc4e0c572992 158 _spi.write(0x00); //filler byte
javakys 1:fc4e0c572992 159 _spi.write(0x00); //filler byte
javakys 1:fc4e0c572992 160 }
javakys 1:fc4e0c572992 161
javakys 1:fc4e0c572992 162
javakys 1:fc4e0c572992 163 void VS1002::volume(signed int left, signed int right)
javakys 1:fc4e0c572992 164 {
javakys 1:fc4e0c572992 165 while(_DREQ == 0);
javakys 1:fc4e0c572992 166
javakys 1:fc4e0c572992 167 unsigned short int _left = -left; //convert the decibel values into a format
javakys 1:fc4e0c572992 168 unsigned short int _right = -right; //readable by the chip cf. datasheet p.32 subsection 8.6.11
javakys 1:fc4e0c572992 169 _left *= 2;
javakys 1:fc4e0c572992 170 _right *= 2;
javakys 1:fc4e0c572992 171 unsigned short int attenuation = ((256 * _left) + _right);
javakys 1:fc4e0c572992 172 cs_low();
javakys 1:fc4e0c572992 173 sci_write(0x0B, attenuation); //writeout these values
javakys 1:fc4e0c572992 174 cs_high();
javakys 1:fc4e0c572992 175 }
javakys 1:fc4e0c572992 176
javakys 1:fc4e0c572992 177 void VS1002::play_song(int song_number)
javakys 1:fc4e0c572992 178 {
javakys 1:fc4e0c572992 179 /*====== Song Select ======*/
javakys 1:fc4e0c572992 180 char str[16]; //folder where the songs are located
javakys 1:fc4e0c572992 181 sprintf(str,"/sdc/%d",song_number); //appending song number to path of the file
javakys 1:fc4e0c572992 182 strcat(str,".mp3"); //appending .mp3 to file name
javakys 1:fc4e0c572992 183 FILE *song;
javakys 1:fc4e0c572992 184 unsigned char array[512]; //array for reading data from file
javakys 1:fc4e0c572992 185 bool play_new=false; // Variable to see if new_song has be assigned or not
javakys 1:fc4e0c572992 186 song = fopen(str, "r"); // Open the music file in read mode
javakys 1:fc4e0c572992 187
javakys 1:fc4e0c572992 188 if(!song)
javakys 1:fc4e0c572992 189 {
javakys 1:fc4e0c572992 190 new_song_number+=1; // Goto Next song on completion of one song
javakys 1:fc4e0c572992 191 if(new_song_number==10)
javakys 1:fc4e0c572992 192 new_song_number=1;
javakys 1:fc4e0c572992 193
javakys 1:fc4e0c572992 194 fclose(song); //close the file
javakys 1:fc4e0c572992 195
javakys 1:fc4e0c572992 196 return;
javakys 1:fc4e0c572992 197 }
javakys 1:fc4e0c572992 198
javakys 1:fc4e0c572992 199 while(!feof(song))
javakys 1:fc4e0c572992 200 {
javakys 1:fc4e0c572992 201 if(!pause)
javakys 1:fc4e0c572992 202 {
javakys 1:fc4e0c572992 203
javakys 1:fc4e0c572992 204 fread(&array, 1, 512, song);
javakys 1:fc4e0c572992 205 for(int i=0; i<512; i++)
javakys 1:fc4e0c572992 206 {
javakys 1:fc4e0c572992 207 sdi_write(array[i]);
javakys 1:fc4e0c572992 208 }
javakys 1:fc4e0c572992 209 volume(volume_set,volume_set);
javakys 1:fc4e0c572992 210 }
javakys 1:fc4e0c572992 211
javakys 1:fc4e0c572992 212 if(new_song_number!=song_number)
javakys 1:fc4e0c572992 213 {
javakys 1:fc4e0c572992 214 play_new=true;
javakys 1:fc4e0c572992 215 break;
javakys 1:fc4e0c572992 216 }
javakys 1:fc4e0c572992 217
javakys 1:fc4e0c572992 218
javakys 1:fc4e0c572992 219 }
javakys 1:fc4e0c572992 220
javakys 1:fc4e0c572992 221 fclose(song); //close the file
javakys 1:fc4e0c572992 222
javakys 1:fc4e0c572992 223 if(!play_new)
javakys 1:fc4e0c572992 224 {
javakys 1:fc4e0c572992 225 new_song_number+=1; // Goto Next song on completion of one song
javakys 1:fc4e0c572992 226 if(new_song_number==10)
javakys 1:fc4e0c572992 227 new_song_number=1;
javakys 1:fc4e0c572992 228 play_new=false;
javakys 1:fc4e0c572992 229 }
javakys 1:fc4e0c572992 230 }
javakys 1:fc4e0c572992 231