A simple library for decoding MP3 files with the VS1053 CoDec chip. The initial library was written by Kaoru Onoe. The library is patched to work with some "LC Technology" VS1053 board that have some IC pins disconnected. Because of that problem, there was no sound out of that boards. Now, these board work ok !
Dependents: W7500_and_VS1053_MP3_decoder VS1053_MP3_decoder_WIZwiki-W7500 VS1053Player Scat
Fork of VS1053 by
VS1053.cpp
- Committer:
- kayekss
- Date:
- 2013-11-08
- Revision:
- 1:00c19f771676
- Parent:
- 0:708868399033
- Child:
- 2:47ba7e2259cd
File content as of revision 1:00c19f771676:
// ==================================================== Nov 08 2013, kayeks == // VS1053.cpp // =========================================================================== // Just a simple library for VLSI's mp3/midi codec chip // - Minimal and simple implementation (and dirty too) #include "mbed.h" #include "VS1053.h" /** Constructor of class VS1053 */ VS1053::VS1053(PinName mosiPin, PinName misoPin, PinName sckPin, PinName csPin, PinName bsyncPin, PinName dreqPin, PinName rstPin, uint32_t spiFrequency) : spi(mosiPin, misoPin, sckPin), cs(csPin), bsync(bsyncPin), dreq(dreqPin), rst(rstPin) { spi.format(8, 0); spi.frequency(spiFrequency); // Initialize outputs cs = 1; bsync = 1; rst = 1; } /** Destructor of class VS1053 */ VS1053::~VS1053() { } /** Do a hardware reset by hitting VS1053's RESET pin */ void VS1053::hardwareReset() { rst = 0; wait(.05); rst = 1; wait(.05); } /** Send a byte to VS1053 */ void VS1053::sendDataByte(uint8_t b) { while (!dreq); bsync = 0; spi.write(b); bsync = 1; } /** Send a data block specified as a pointer to VS1053 */ size_t VS1053::sendDataBlock(uint8_t* p, size_t length) { size_t sizeSent = 0; if (!p || !length) return 0; while (length) { while (!dreq); bsync = 0; for (uint8_t i = 0; i < 32 && length--; i++) { spi.write(*p++); sizeSent++; } bsync = 1; } return sizeSent; } /** Change VS1053's PLL setting for speedup */ void VS1053::clockUp() { // Set CLKI to 43.0-55.3 MHz writeReg(SCI_CLOCKF, 0x8800); // SC_MULT=4 (3.5x), SC_ADD=1 (+1.0x) } /** Send cancel request to VS1053 */ bool VS1053::sendCancel() { uint16_t reg; // Set SM_CANCEL bit reg = readReg(SCI_MODE); if (reg & 0x0008) { // Abort if SM_CANCEL is still set return 0; } writeReg(SCI_MODE, reg | 0x0008); return 1; } /** Stop playing (CALL AFTER sendCancel SUCCESSES) */ bool VS1053::stop() { uint16_t reg; uint8_t endFillByte; size_t length; // If SM_CANCEL is still set, do nothing reg = readReg(SCI_MODE); if (reg & 0x0008) { return 0; } // Read endFillByte from XRAM <1E06h> writeReg(SCI_WRAMADDR, 0x1e06); reg = readReg(SCI_WRAM); // Send lower 8 bits of endFillByte 2,052 times endFillByte = reg & 0xff; length = 2052; while (length) { while (!dreq); bsync = 0; for (uint8_t i = 0; i < 32 && length--; i++) { spi.write(endFillByte); } bsync = 1; } // Check if both HDAT0 and HDAT1 are cleared return readReg(SCI_HDAT0) == 0x0000 && readReg(SCI_HDAT1) == 0x0000; } /** Write to an SCI (Serial Control Interface) register entry */ void VS1053::writeReg(uint8_t addr, uint16_t word) { // If addr is out-of-range, do nothing if (addr > 0x0f) { return; } while (!dreq); cs = 0; spi.write(0x02); // Send a "Write SCI" instruction (02h), spi.write(addr); // target address, spi.write(word >> 8); // high byte, spi.write(word & 0xff); // then low byte while (!dreq); cs = 1; } /** Read an SCI (Serial Control Interface) register entry */ uint16_t VS1053::readReg(uint8_t addr) { uint16_t word; // If addr is out-of-range, return a beef if (addr > 0x0f) { return 0xbeef; } while (!dreq); cs = 0; spi.write(0x03); // Send a "Read SCI" instruction (03h) spi.write(addr); // and target address word = spi.write(0xff) << 8; // Receive high byte with dummy data FFh word |= spi.write(0xff); // Receive low byte while (!dreq); cs = 1; return word; }