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/*
Copyright (C) 2002 Pedro Zorzenon Neto <pzn@vztech.com.br>
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.
Do not forget to visit Free Software Foundation site: http://fsf.org
$Id: parport.h,v 1.2 2003/06/30 17:20:25 pzn Exp $
*/
#ifndef _PARPORT_H
#define _PARPORT_H
/* SPP standard parallel port
* http://www.beyondlogic.org/spp/parallel.htm */
/* parallel port output bits */
#define PARPORT_D0 0
#define PARPORT_D1 1
#define PARPORT_D2 2
#define PARPORT_D3 3
#define PARPORT_D4 4
#define PARPORT_D5 5
#define PARPORT_D6 6
#define PARPORT_D7 7
#define PARPORT_STROBE 0 /* hardware inverted */
#define PARPORT_LINEFEED 1 /* hardware inverted */
#define PARPORT_RESET 2
#define PARPORT_SELECT 3
/* parallel port input bits */
#define PARPORT_ERROR 3
#define PARPORT_SELECTIN 4 /* hardware inverted */
#define PARPORT_PAPEROUT 5
#define PARPORT_ACK 6
#define PARPORT_BUSY 7 /* hardware inverted */
typedef struct parport {
long int base_address;
unsigned int last_write;
} parport_t;
parport_t * parport_init (long int base_address);
void parport_destroy (parport_t * self);
int parport_readbit (parport_t * self, int bit);
unsigned int parport_readbyte (parport_t * self);
void parport_writebit (parport_t * self, int bit, unsigned int value);
void parport_writebyte (parport_t * self, unsigned int value);
#endif
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