src/drivers/llc.h

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// $Id: llc.h,v 1.6 2004/07/07 16:14:01 alpha Exp $
//
// Copyright (c) 1999-2004 Darius Rad
//
// This file is part of the OpenOtto project.
//
// OpenOtto 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.
//



#ifndef _LLC_H
#define _LLC_H


#define OTTO_PACKET_PULSES_MAX  102


struct otto_llc_pulse
{
  unsigned int bus:4;  
  unsigned int unused:3;  
  unsigned int polarity:1;  
  unsigned int length:24;  
};

enum otto_llc_symbol
{
  OTTO_LLC_SYM_UNKNOWN = 0,  
  OTTO_LLC_SYM_ZERO,  
  OTTO_LLC_SYM_ONE,  
  OTTO_LLC_SYM_SOF,  
  OTTO_LLC_SYM_EOD,  
  OTTO_LLC_SYM_EOF,  
  OTTO_LLC_SYM_BRK,  
  OTTO_LLC_SYM_NB0,  
  OTTO_LLC_SYM_NB1,  
  OTTO_LLC_SYM_IFS,  
};


struct otto_llc_timing
{
  int min;  
  int nom;  
  int max;  
};


struct otto_llc_format
{
  char *name;
  char *desc;
  enum otto_llc_symbol (*decode_symbol) ( struct otto_llc_pulse );
  int (*encode_symbol) (struct otto_llc_pulse *, enum otto_llc_symbol, struct otto_llc_pulse, enum otto_llc_symbol);
};


int
otto_llc_set_busenable(
  unsigned int busmask  
);

int
otto_llc_get_busenable(
  unsigned int *busmask  
);

int
otto_llc_set_pulse(
  enum otto_llc_symbol id,  
  struct otto_llc_pulse pulse  
);

int
otto_llc_get_pulse(
  enum otto_llc_symbol id,  
  struct otto_llc_pulse *pulse  
);

int
otto_llc_decode(
  union otto_packet *pkt,  
  struct otto_llc_pulse pulses[],  
  int npulses  
);

int
otto_llc_encode(
  union otto_packet *pkt,  
  struct otto_llc_pulse pulses[],  
  int *npulses  
);


#endif

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