mbeduino MP3 Sheild player MP3 player that runs on mebeduin with MP3 Shield. Regarding mbeduino, refer to: http://mbed.org/users/okini3939/notebook/mbeduino/ Regarding MP3 Shiled, refer to: http://www.sparkfun.com/commerce/product_info.php?products_id=9736
Dependencies: mbed SDFileSystem
VS1053.cpp
- Committer:
- xshige
- Date:
- 2010-10-12
- Revision:
- 0:67cb2f650c15
- Child:
- 1:c47269f0e9e1
File content as of revision 0:67cb2f650c15:
#include "VS1053.h" #include "mbed.h" Serial pc(USBTX, USBRX); /* ================================================================== * Constructor * =================================================================*/ VS1053::VS1053( 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 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); _RST = 0; wait(0.01); _RST = 1; wait(0.10); } 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::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 VS1053::sdi_initialise(void) { _spi.format(8,0); _spi.frequency(7000000); //set to 7MHz 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(); } unsigned short int VS1053::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::volume(void) { #ifdef FIXED_VOL unsigned char volumize = (0 * 255); // FIXED VOL (not support volume input) #else unsigned char volumize = (_VOL * 255); #endif while(!_DREQ); unsigned short int attenuation = ((256 * volumize) + volumize); sci_write(0x0B, attenuation); } void VS1053::writeStream(unsigned char *array, int size) { for(int i=0; i<size; i++) { sdi_write(array[i]); } volume(); } #if 0 // this function does not work // because of function call overhead void VS1053::putcStream(unsigned char datum) { sdi_write(datum); } #endif void VS1053::terminateStream(void) { for(int n=0; n<2048; n++) { sdi_write(0x00); } }