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https://github.com/netfun2000/lcd4linux.git
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95a086eefd
even more HD44780 cleanups, hardwiring for LCM-162 git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@490 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
123 lines
4.3 KiB
C
123 lines
4.3 KiB
C
/* $Id: drv_generic_parport.h,v 1.7 2004/09/18 15:58:57 reinelt Exp $
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*
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* generic driver helper for parallel port displays
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*
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* Copyright 1999, 2000 Michael Reinelt <reinelt@eunet.at>
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* Copyright 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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*
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* This file is part of LCD4Linux.
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*
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* LCD4Linux is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* LCD4Linux is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* $Log: drv_generic_parport.h,v $
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* Revision 1.7 2004/09/18 15:58:57 reinelt
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* even more HD44780 cleanups, hardwiring for LCM-162
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*
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* Revision 1.6 2004/09/18 08:22:59 reinelt
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* drv_generic_parport_status() to read status lines
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*
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* Revision 1.5 2004/06/26 12:04:59 reinelt
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*
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* uh-oh... the last CVS log message messed up things a lot...
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*
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* Revision 1.4 2004/06/26 09:27:21 reinelt
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*
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* added '-W' to CFLAGS
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* changed all C++ comments to C ones
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* cleaned up a lot of signed/unsigned mistakes
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*
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* Revision 1.3 2004/06/20 10:09:55 reinelt
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*
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* 'const'ified the whole source
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*
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* Revision 1.2 2004/01/20 15:32:49 reinelt
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* first version of Next Generation HD44780 (untested! but it compiles...)
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* some cleanup in the other drivers
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*
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* Revision 1.1 2004/01/20 14:35:38 reinelt
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* drv_generic_parport added, code from parport.c
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*
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*/
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/*
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*
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* exported fuctions:
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*
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* int drv_generic_parport_open (void)
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* reads 'Port' entry from config and opens
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* the parallel port
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* returns 0 if ok, -1 on failure
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*
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* int drv_generic_parport_close (void)
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* closes parallel port
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* returns 0 if ok, -1 on failure
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*
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* unsigned char drv_generic_parport_wire_ctrl (char *name, char *deflt)
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* reads wiring for one control signal from config
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* returns DRV_GENERIC_PARPORT_CONTROL_* or 255 on error
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*
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* unsigned char drv_generic_parport_hardwire_ctrl (char *name)
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* returns hardwiring for one control signal
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* same as above, but does not read from config,
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* but cheks the config and emits a warning that the config
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* entry will be ignored
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* returns DRV_GENERIC_PARPORT_CONTROL_* or 255 on error
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*
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* unsigned char drv_generic_parport_wire_data (char *name, char *deflt)
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* reads wiring for one data signal from config
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* returns 1<<bitpos or 255 on error
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*
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* void drv_generic_parport_direction (int direction)
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* 0 - write to parport
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* 1 - read from parport
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*
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* unsigned char drv_generic_parport_status (void)
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* reads control lines
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*
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* void drv_generic_parport_control (unsigned char mask, unsigned char value)
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* frobs control line and takes care of inverted signals
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*
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* void drv_generic_parport_toggle (unsigned char bit, int level, int delay)
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* toggles the line <bit> to <level> for <delay> nanoseconds
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*
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* void drv_generic_parport_data (unsigned char value)
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* put data bits on DB1..DB8
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*
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* unsigned char drv_generic_parport_read (void)
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* reads a byte from the parallel port
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*
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* void drv_generic_parport_debug(void)
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* prints status of control lines
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*
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*/
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#ifndef _DRV_GENERIC_PARPORT_H_
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#define _DRV_GENERIC_PARPORT_H_
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int drv_generic_parport_open (const char *section, const char *driver);
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int drv_generic_parport_close (void);
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unsigned char drv_generic_parport_wire_ctrl (const char *name, const char *deflt);
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unsigned char drv_generic_parport_wire_data (const char *name, const char *deflt);
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void drv_generic_parport_direction (const int direction);
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unsigned char drv_generic_parport_status (void);
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void drv_generic_parport_control (const unsigned char mask, const unsigned char value);
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void drv_generic_parport_toggle (const unsigned char bit, const int level, const int delay);
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void drv_generic_parport_data (const unsigned char data);
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unsigned char drv_generic_parport_read (void);
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void drv_generic_parport_debug (void);
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#endif
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