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
Diff: VS1053.cpp
- Revision:
- 0:67cb2f650c15
- Child:
- 1:c47269f0e9e1
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/VS1053.cpp Tue Oct 12 14:11:52 2010 +0000 @@ -0,0 +1,208 @@ +#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); + } + +}