robijn
5d0b33c5ef
Enhanced(?) timing.h with DELAY_AUTOSELECT. Cheered up some comments, moved #ifndef FOO_H #define FOO_H to just after the copyright and explanation comment.
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/*
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* This file contains defines to control the LPT port.
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* A lot of this was originally in hd44780-low.h
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*
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* Moved from the HD44780 driver by Joris Robijn.
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*
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* This file is released under the GNU General Public License. Refer to the
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* COPYING file distributed with this package.
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*
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* Copyright (c) 2000, 1999, 1995 Benjamin Tse <blt@Comports.com>
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* 2001 Joris Robijn <joris@robijn.net>
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* 2001 Mark Haemmerling <mail@markh.de>
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* 2000 Charles Steinkuehler <cstein@newtek.com>
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* 1999 Andrew McMeikan <andrewm@engineer.com>
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* 1998 Richard Rognlie <rrognlie@gamerz.net>
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* 1997 Matthias Prinke <m.prinke@trashcan.mcnet.de>
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*/
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#ifndef LPT_PORT_H
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#define LPT_PORT_H
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/* Output data
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* Write to baseaddress+0
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*/
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// Straight-forward use, no defines needed for this...
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/* Control output lines
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* Write to baseaddress+2
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*/
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#define nSTRB 0x01 /* negative logic */
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#define STRB 0x01
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#define nLF 0x02
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#define LF 0x02
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#define INIT 0x04 /* the only positive logic output line */
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#define nSEL 0x08
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#define SEL 0x08
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#define ENIRQ 0x10 /* Enable IRQ via ACK line */
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#define ENBI 0x20 /* Enable bi-directional port */
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#define OUTMASK 0x0B /* SEL, LF and STRB are hardware inverted */
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/* Use this mask only for the control output lines */
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/* XOR with this mask ( ^ OUTMASK ) */
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/* Control input lines
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* Read from baseaddress+1
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*/
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#define nFAULT 0x08
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#define FAULT 0x08
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#define SELIN 0x10
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#define PAPEREND 0x20
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#define nACK 0x40
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#define ACK 0x40
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#define BUSY 0x80
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#define IRQ 0x02
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#define INMASK 0x84 /* BUSY input and the IRQ indicator are inverted */
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/* Use this mask only for the control input lines */
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/* XOR with this mask ( ^ OUTMASK ) */
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#endif
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