File content as of revision 1:ced2c297cc1b:

/* mbed VLSI VS1053b library
 * Copyright (c) 2010 Christian Schmiljun
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
 
/* This code based on:
 *  mbeduino_MP3_Shield_MP3Player
 *  http://mbed.org/users/xshige/programs/mbeduino_MP3_Shield_MP3Player/lgcx63
 *  2010-10-16
 */
 
#include "VS1053.h"
#include "mbed.h"

// patch binarys
#include "Patches/VS1053b_patch_1_5.c"
#include "Patches/VS1053b_patch_1_5_flac.c"
#include "Patches/VS1053b_patch_1_4_flac.c"
#include "Patches/VS1053b_specana_0_9.c"
#include "Patches/VS1053b_pcm_recorder_0_9.c"


/* ==================================================================
 * Constructor
 * =================================================================*/
VS1053::VS1053(
    PinName mosi, PinName miso, PinName sck, PinName cs, PinName rst,
    PinName dreq, PinName dcs)
        :
        _spi(mosi, miso, sck),
        _CS(cs),
        _RST(rst),
        _DREQ(dreq),
        _DCS(dcs) {           
        _volume = DEFAULT_VOLUME;
        _balance = DEFAULT_BALANCE_DIFERENCE_LEFT_RIGHT;
}

/*===================================================================
 * Functions
 *==================================================================*/

void VS1053::cs_low(void) {
    _CS = 0;
}
void VS1053::cs_high(void) {
    _CS = 1;
}
void VS1053::dcs_low(void) {
    _DCS = 0;

}
void VS1053::dcs_high(void) {
    _DCS = 1;
}
void VS1053::sci_en(void) {                  //SCI enable
    cs_high();
    dcs_high();
    cs_low();
}
void VS1053::sci_dis(void) {                  //SCI disable
    cs_high();
}
void VS1053::sdi_en(void) {                  //SDI enable
    dcs_high();
    cs_high();
    dcs_low();
}
void VS1053::sdi_dis(void) {                  //SDI disable
    dcs_high();
}
void VS1053::reset(void) {                  //hardware reset
//    wait(0.01);
    wait_ms(10);
    _RST = 0;
//    wait(0.01);
    wait_ms(5);
    _RST = 1;
//    wait(0.10);
    wait_ms(10);
}
void VS1053::power_down(void) {              //hardware and software reset
    cs_low();
    reset();
//    sci_write(0x00, SM_PDOWN);
    sci_write(0x00, 0x10); // tempo
    wait(0.01);
    reset();
}
void VS1053::spi_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
    _spi.frequency(2000000);                //rising edge data record, freq. 2Mhz


    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 VS1053::sdi_initialise(void) {
    _spi.frequency(8000000);                //set to 8 MHz to make fast transfer
    cs_high();
    dcs_high();
}
void VS1053::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 VS1053::sdi_write(unsigned char datum) {
    sdi_en();

    while (!_DREQ);
    _spi.write(datum);

//?    sci_dis();
    sdi_dis();
}
unsigned short VS1053::sci_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 VS1053::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 VS1053::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 VS1053::writeStream(unsigned char *array, unsigned int size) {    
    for (int i=0; i<size; i++) {
        sdi_write(array[i]);
    }
}

#if 0
// this function does not work
// because of function call overhead
void VS1053::putcStream(unsigned char datum) {
    sdi_write(datum);
}
#endif

unsigned short int VS1053::wram_read(unsigned short int address) {
    unsigned short int tmp1,tmp2;
    sci_write(SCI_WRAMADDR,address);
    tmp1=sci_read(SCI_WRAM);
    sci_write(SCI_WRAMADDR,address);
    tmp2=sci_read(SCI_WRAM);
    if (tmp1==tmp2) return tmp1;
    sci_write(SCI_WRAMADDR,address);
    tmp1=sci_read(SCI_WRAM);
    if (tmp1==tmp2) return tmp1;
    sci_write(SCI_WRAMADDR,address);
    tmp1=sci_read(SCI_WRAM);
    if (tmp1==tmp2) return tmp1;
    return tmp1;
}

void VS1053::wram_write(unsigned short int address, unsigned short int data) {
    sci_write(SCI_WRAMADDR,address);
    sci_write(SCI_WRAM,data);
    return;
}

void VS1053::setPlaySpeed(unsigned short speed)
{
    wram_write(para_playSpeed, speed);
#ifdef DEBUG
    printf("VS1053b: Change speed. New speed: %d\r\n", speed);
#endif
}

void VS1053::terminateStream(void) {
    // send at least 2052 bytes of endFillByte[7:0].
    // read endFillByte  (0 .. 15) from wram 
    unsigned short endFillByte=wram_read(para_endFillByte);
    // clear endFillByte (8 .. 15)
    endFillByte = endFillByte ^0x00FF;                          
    for (int n = 0; n < 2052; n++) 
        sdi_write(endFillByte);
    
    // set SCI MODE bit SM CANCEL    
    unsigned short sciModeByte = sci_read(SCI_MODE);        
    sciModeByte |= SM_CANCEL;    
    sci_write(SCI_MODE, sciModeByte);
           
    // send up 2048 bytes of endFillByte[7:0]. 
    for (int i = 0; i < 64; i++) 
    { 
        // send at least 32 bytes of endFillByte[7:0]
        for (int n = 0; n < 32; n++) 
            sdi_write(endFillByte);
        // read SCI MODE; if SM CANCEL is still set, repeat
        sciModeByte = sci_read(SCI_MODE);    
        if ((sciModeByte & SM_CANCEL) == 0x0000)
        {
            break;
        }
    }
    
    if ((sciModeByte & SM_CANCEL) == 0x0000)
    {    
#ifdef DEBUG    
        printf("VS1053b: Song sucessfully sent. Terminating OK\r\n");
        printf("VS1053b: SCI MODE = %#x, SM_CANCEL = %#x\r\n", sciModeByte, sciModeByte & SM_CANCEL);
#endif        
    }        
    else
    {
#ifdef DEBUG    
        printf("VS1053b: SM CANCEL hasn't cleared after sending 2048 bytes, do software reset\r\n");
        printf("VS1053b: SCI MODE = %#x, SM_CANCEL = %#x\r\n", sciModeByte, sciModeByte & SM_CANCEL);        
#endif        
        //TODO: testing
        initialize();
    }    
}

void VS1053::write_plugin(const unsigned short *plugin, unsigned int len) {
    unsigned int i;
    unsigned short addr, n, val;

    for (i=0; i<len;) {
        addr = plugin[i++];
        n    = plugin[i++];
        if (n & 0x8000U) { //RLE run, replicate n samples
            n  &= 0x7FFF;
            val = plugin[i++];
            while (n--) {
                sci_write(addr,val);
            }
        } else { //copy run, copy n sample
            while (n--) {
                val = plugin[i++];
                sci_write(addr,val);
            }
        }
    }

    return;
}


bool VS1053::initialize(void) {
    _RST = 1;
    cs_high();                           //chip disabled
    spi_initialise();                    //initialise MBED
        
    sci_write(SCI_MODE, (SM_SDINEW+SM_RESET)); //  set mode reg.    
    wait_ms(10);
    
#ifdef DEBUG    
    unsigned int info = wram_read(para_chipID_0);
    printf("VS1053b: ChipID_0:%04X\r\n", info);
    info = wram_read(para_chipID_1);
    printf("VS1053b: ChipID_1:%04X\r\n", info);
    info = wram_read(para_version);
    printf("VS1053b: Structure version:%04X\r\n", info);
#endif

    //get chip version, set clock multiplier and load patch
    int i = (sci_read(SCI_STATUS) & 0xF0) >> 4;
    if (i == 4) {
#ifdef DEBUG
        printf("VS1053b: Installed Chip is: VS1053\r\n");
#endif        
        sci_write(SCI_CLOCKF, (SC_MULT_XTALIx50));
        wait_ms(10);
#ifdef VS_PATCH
        // loading patch
        write_plugin(vs1053b_patch, sizeof(vs1053b_patch)/2);        

#ifdef DEBUG        
        printf("VS1053b: Patch is loaded.\r\n");
        printf("VS1053b: Patch size:%d bytes\r\n",sizeof(vs1053b_patch));
#endif
        
#endif // VS_PATCH
    } 
    else 
    {
#ifdef DEBUG    
        printf("VS1053b: Not Supported Chip\r\n");
#endif        
        return false;
    }
    
    // change spi to higher speed 
    sdi_initialise();                
    changeVolume();
    return true;
}

void VS1053::setVolume(float vol) 
{    
    if (vol > -0.5)
        _volume = -0.5;
    else
        _volume = vol;

    changeVolume();
}

float VS1053::getVolume(void) 
{
    return _volume;
}

void VS1053::setBalance(float balance) 
{    
    _balance = balance;
            
    changeVolume();
}

float VS1053::getBalance(void)
{
    return _balance;    
}

void VS1053::changeVolume(void) 
{
    // volume calculation        
    unsigned short volCalced = (((char)(_volume / -0.5f)) << 8) + (char)((_volume - _balance) / -0.5f);
   
    sci_write(0x0B, volCalced);
    
#ifdef DEBUG    
    printf("VS1053b: Change volume to %#x (%f, Balance = %f)\r\n", volCalced, _volume, _balance);        
#endif    
}