File content as of revision 0:37da71b87d96:

#include "VS1002.h"
#include "mbed.h"
#include "MSCFileSystem.h"


/* ==================================================================
 * Constructor
 * =================================================================*/

VS1002::VS1002(PinName mosi, PinName miso, PinName sck, PinName cs, PinName rst, PinName dreq, PinName dcs, PinName vol)
:_spi(mosi, miso, sck), _CS(cs), _RST(rst), _DREQ(dreq), _DCS(dcs), _VOL(vol)
{      

}   


/*===================================================================
 * Functions
 *==================================================================*/
 
void VS1002::cs_low(void)
{
    _CS = 0;                                
}
void VS1002::cs_high(void)
{
    _CS = 1;                                
}
void VS1002::dcs_low(void)
{
    _DCS = 0;
}
void VS1002::dcs_high(void)
{
    _DCS = 1;
}
void VS1002::sci_en(void)                    //SCI enable
{
    cs_high();
    dcs_high();
    cs_low();
}
void VS1002::sci_dis(void)                    //SCI disable
{
    cs_high();
}
void VS1002::sdi_en(void)                    //SDI enable
{
    dcs_high();
    cs_high();
    dcs_low();
}
void VS1002::sdi_dis(void)                    //SDI disable
{
    dcs_high();
}
void VS1002::reset(void)                    //hardware reset
{
    wait(0.01);
    _RST = 0;
    wait(0.01);
    _RST = 1;
    wait(0.10);
}
void VS1002::power_down(void)                //hardware and software reset
{
    cs_low();
    reset();
    sci_write(0x00, SM_PDOWN);
    wait(0.01);
    reset();
}
void VS1002::sci_initialise(void)
{
    _RST = 1;                                //no reset
    _spi.format(8,0);                        //spi 8bit interface, steady state low
    _spi.frequency(1000000);                //rising edge data record, freq. 1Mhz
    
    cs_low();
    for(int i=0; i<4; i++)
    {
    _spi.write(0xFF);                        //clock the chip a bit
    }
    cs_high();
    dcs_high();
    wait_us(5);
}
void VS1002::sdi_initialise(void)
{
    _spi.format(8,0);
    _spi.frequency(7000000);                //set to 7MHz
    
    cs_high();
    dcs_high();
}
void VS1002::sci_write(unsigned char address, unsigned short int data)
{
    sci_en();                                //enables SCI/disables SDI
    
    while(!_DREQ);                            //wait unitl data request is high
    _spi.write(0x02);                        //SCI write
    _spi.write(address);                    //register address
    _spi.write((data >> 8) & 0xFF);            //write out first half of data word
    _spi.write(data & 0xFF);                //write out second half of data word
    
    sci_dis();                                //enables SDI/disables SCI
    wait_us(5);
}
void VS1002::sdi_write(unsigned char datum)
{
    sdi_en();
    
    while(!_DREQ);
    _spi.write(datum);
    
    sci_dis();
}
unsigned short int VS1002::read(unsigned short int address)
{
    cs_low();                                //enables SCI/disables SDI
    
    while(!_DREQ);                            //wait unitl data request is high
    _spi.write(0x03);                        //SCI write
    _spi.write(address);                    //register address
    unsigned short int received = _spi.write(0x00);    //write out dummy byte
    received <<= 8;
    received += _spi.write(0x00);            //write out dummy byte
    
    cs_high();                                //enables SDI/disables SCI
    
    return received;                        //return received word
}
void VS1002::sine_test_activate(unsigned char wave)
{
    cs_high();                                //enables SDI/disables SCI
    
    while(!_DREQ);                            //wait unitl data request is high
    _spi.write(0x53);                        //SDI write
    _spi.write(0xEF);                        //SDI write
    _spi.write(0x6E);                        //SDI write
    _spi.write(wave);                        //SDI write
    _spi.write(0x00);                        //filler byte
    _spi.write(0x00);                        //filler byte
    _spi.write(0x00);                        //filler byte
    _spi.write(0x00);                        //filler byte

    cs_low();                                //enables SCI/disables SDI
}
void VS1002::sine_test_deactivate(void)
{
    cs_high();
    
    while(!_DREQ);
    _spi.write(0x45);                        //SDI write
    _spi.write(0x78);                        //SDI write
    _spi.write(0x69);                        //SDI write
    _spi.write(0x74);                        //SDI write
    _spi.write(0x00);                        //filler byte
    _spi.write(0x00);                        //filler byte
    _spi.write(0x00);                        //filler byte
    _spi.write(0x00);                        //filler byte
}
void VS1002::volume(void)
{
    unsigned char volumize = (_VOL * 255);
    while(!_DREQ);
    
    unsigned short int attenuation = ((256 * volumize) + volumize);
    sci_write(0x0B, attenuation);
}


//Play the mp3 file from the USB filesystem (stream.mp3 on usb system)
void VS1002::play_song()
{

           
    /*====== File Transfer ======*/
    
    FILE *song;
    unsigned char array[512];    
    song = fopen("/msc/stream.mp3", "rb");
    
    if(!song) 
    {
        exit(1);
    }
   
       while(!feof(song))
    {
           fread(&array, 1, 512, song);
           for(int i=0; i<512; i++)
           {
               sdi_write(array[i]);
           }
           volume();
       }
    for(int n=0; n<2048; n++)
       {
           sdi_write(0x00);
       }
    fclose(song); 
  
                                   
}