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.h

Committer:
javakys
Date:
2017-03-30
Revision:
2:cea9f6564641
Parent:
1:fc4e0c572992

File content as of revision 2:cea9f6564641:

#ifndef VS1002_H
#define VS1002_H

#include "mbed.h"
#include "SDFileSystem.h"
#include "string"
#include "string.h"


//SCI_MODE register bits as of p.26 of the datasheet
#define SM_DIFF            0x0001
#define SM_SETTOZERO    0x0002
#define SM_RESET        0x0004
#define SM_OUTOFWAV        0x0008
#define SM_PDOWN        0x0010
#define SM_TESTS        0x0020
#define    SM_STREAM        0x0040
#define SM_PLUSV        0x0080
#define    SM_DACT            0x0100
#define    SM_SDIORD        0x0200
#define    SM_SDISHARE        0x0400
#define    SM_SDINEW        0x0800
#define    SM_ADPCM        0x1000
#define    SM_ADPCM_HP        0x2000

extern int new_song_number;
extern int volume_set;
extern bool pause;
extern bool mute;
extern char * song_name[9];


class VS1002  {

public:

    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);
     
    void cs_low(void); 
    void cs_high(void);
    void dcs_low(void);
    void dcs_high(void);
    void sci_en(void);
    void sci_dis(void);
    void sdi_en(void);
    void sdi_dis(void);
    
    void sci_initialise(void);
    void sdi_initialise(void);
    void reset(void);
    void power_down(void);
 
    void sci_write(unsigned char, unsigned short int);
    void sdi_write(unsigned char);
    unsigned short int read(unsigned short int);
    void sine_test_activate(unsigned char);
    void volume(signed int,signed int);
    void sine_test_deactivate(void);
    void play_song(int);
    
    int num_of_files;
    
    DigitalIn _DREQ;
    DigitalOut _RST;
    
protected:

    SPI _spi;
    DigitalOut _CS;
    DigitalOut _DCS;
    SDFileSystem _sd;

};
#endif