text: 
  /*
    Copyright (C) 2001 Jesper Hansen <jesperh@telia.com>.
  
    This file is part of the yampp system.
  
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 2
    of the License, or (at your option) any later version.
  
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
  
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software Foundation, 
    Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
  
  
  
  
  #define MP3_PORT	PORTB
  #define BSYNC_PORT	PORTB    
  #define DREQ_PORT	PORTB
  
  #define MP3_PIN		PB4				// MP3 control bit
  #define	BSYNC_PIN	PB3				// BSYNC signal
  #define DREQ_PIN	PB2				// DREQ signal
  
  
  // setup I/O pins and directions for
  // communicating with the VS1001
  void vs1001_init_io(void);
  
  // setup the VS1001 chip for decoding
  void vs1001_init_chip(void);
  
  // reset the VS1001
  void vs1001_reset(void);
  
  // send a number of zero's to the VS1001
  void vs1001_nulls(u16 nNulls);
  
  // read one or more word(s) from the VS1001 Control registers
  void vs1001_read(u08 address, u16 count, u16 *pData);
  
  // write one or more word(s) to the VS1001 Control registers
  void vs1001_write(u08 address, u16 count, u16 *pData);
  
  // set the VS1001 volume
  void vs_1001_setvolume(u08 left, u08 right);
  
  // send MP3 data
  inline void vs1001_send_data(u08 b);
  
  // send MP3 data in 32 byte blocks
  inline void vs1001_send_32(u08 *p);
  
  