#ifndef AUDIO_VS1011_H
#define AUDIO_VS1011_H

  #include <avr/io.h>
  #include <util/delay.h>
  #include <inttypes.h>
  #include <avr/eeprom.h>

  #include "../spi.h"
  /// #include "../../uart/uart.h"
  /// #include "../../stdout.h"


  #define audio_vs1011_enable()  PORTC &= ~(1<<PC6); // <XDCS>
  #define audio_vs1011_disable() PORTC |=  (1<<PC6); // </XDCS>
  #define audio_vs1011_isDREQ()  (PIND & (1<<PD5))
  #define audio_vs1011_waitDREQ(); loop_until_bit_is_set(PIND, PD5);


  // [OPERATIONS]
  #define VS_WRITE 0x2
  #define VS_READ  0x3


  // [SCI REGISTERS] - page 29
  #define SCI_MODE        0x0 // Mode control
  #define SCI_STATUS      0x1 // Status of VS1011e
  #define SCI_BASS        0x2 // Built-in bass/treble enhancer
  #define SCI_CLOCKF      0x3 // Clock freq + multiplier
  #define SCI_DECODE_TIME 0x4 // Decode time in seconds
  #define SCI_AUDATA      0x5 // Misc. audio data
  #define SCI_WRAM        0x6 // RAM write/read
  #define SCI_WRAMADDR    0x7 // Base address for RAM write/read
  #define SCI_HDAT0       0x8 // Stream header data 0
  #define SCI_HDAT1       0x9 // Stream header data 1
  #define SCI_AIADDR      0xA // Start address of application
  #define SCI_VOL         0xB // Volume control
  #define SCI_AICTRL0     0xC // Application control register 0
  #define SCI_AICTRL1     0xD // Application control register 1
  #define SCI_AICTRL2     0xE // Application control register 2
  #define SCI_AICTRL3     0xF // Application control register 3

  // [VALUES::SCI_MODE]
  #define SM_DIFF       0x1    // Differential
  #define SM_LAYER12    0x2    // Allow MPEG layers I & II
  #define SM_RESET      0x4    // Soft reset
  #define SM_OUTOFWAV   0x8    // Jump out of WAV decoding
  #define SM_SETTOZERO1 0x10   // set to zero
  #define SM_TESTS      0x20   // Allow SDI tests
  #define SM_STREAM     0x40   // Stream mode
  #define SM_SETTOZERO2 0x80   // set to zero

  #define SM_DACT       0x100  // DCLK active edge
  #define SM_SDIORD     0x200  // SDI bit order
  #define SM_SDISHARE   0x400  // Share SPI chip select
  #define SM_SDINEW     0x800  // VS1002 native SPI modes
  #define SM_SETTOZERO3 0x1000 // set to zero

  // [VALUES::SCI_CLOCKF]
  #define SC_CLK2X      0x8000 // clock doubler

  #define audio_vs1011_init_xcs()    PORTC &= ~(1<<PC1)  // <XCS>
  #define audio_vs1011_exit_xcs()    PORTC |=  (1<<PC1); // </XCS>

  #define audio_vs1011_init_xdcs()   PORTC &= ~(1<<PC2)  // <XCS>
  #define audio_vs1011_exit_xdcs()   PORTC |=  (1<<PC2); // </XCS>

  #define wait4dreq() loop_until_bit_is_set(PINC, PC3);  // <DREQ></DREQ>


  /// void audio_vs1011_cmd(const unsigned char sci_cmd, const unsigned char hdata,
    /// const unsigned char ldata);
  void audio_vs1011_init();
  void audio_vs1011_cmd(const unsigned char cmd, uint16_t dat);
  void audio_vs1011_setVolume(const unsigned char left, const unsigned char right);

  //void audio_vs1011_dat(const unsigned char dat[32]);
  void audio_vs1011_dat(const unsigned char* dat, const unsigned char size);
  /// unsigned char audio_vs1011_stream(unsigned char (*readfn)());
  void audio_vs1011_test_sine();
  void audio_vs1011_test_volume();
  /// void audio_vs1011_test_eeprom();
  /// void audio_vs1011_enable();
  /// void audio_vs1011_disable();
  /// char audio_vs1011_isDREQ();


  /// void audio_vs1011_test_softreset();


#endif