/********************************************************************************
    General utilities for AVR I/O handling
    Copyright (C) 2006  Alexey "Gall" Galakhov

    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
*********************************************************************************/
#ifndef _BIT_H
#define _BIT_H

#ifndef BV
  #ifdef _BV
    #define BV		_BV
  #else
    #define BV(bit)	(1 << bit)
  #endif
#endif

#ifndef sbi
  #define sbi(port, bit)	\
    port |= BV (bit)		
#endif

#ifndef cbi
  #define cbi(port, bit)	\
    port &= ~BV (bit)		
#endif

#ifndef bit
  #define bit(port, bit, value)	\
  {				\
    if (value)			\
        sbi (port, bit);	\
    else			\
        cbi (port, bit);	\
  }
#endif

#endif /* _BIT_H */