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relicence CFontz633io.c and explain the reasons for it

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marschap
2006-03-29 10:55:02 +00:00
parent d9999ff9d3
commit 3be87bda21
1 changed files with 46 additions and 37 deletions
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server/drivers/CFontz633io.c
+46 -37
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@@ -1,18 +1,46 @@
/* This file should be release under the GPL, /* interfacing routines for the CrystalFontz CFA-631, CFA-633 and CFA-635 LCDs
* However most of this is translation from the windows code
* from Brent A. Crosby. ===========================================================================
* So I have to check with him. 633 Test code for linux.
*/ Copyright 2002, David GLAUDE
/* Partial copyright
* =========================================================================== 2001 Crystalfontz America, Inc.
* 633 Test code for linux. brent@crystalfontz.com
* Copyright 2002, David GLAUDE Written by Brent A. Crosby
* Partial copyright www.crystalfontz.com
* 2001 Crystalfontz America, Inc. ===========================================================================
* brent@crystalfontz.com
* Written by Brent A. Crosby Partial copyright (C) 2005-2006 Peter Marschall
* www.crystalfontz.com
* =========================================================================== Most of the code in this file is based on the translation from the windows
code.
Intensive code analysis performed by Peter Marschall showed that,
at the time of the release of the GPL'ed interfacing code for the
CF631/633 from CrystalFontz by Brent A. Crosby in 2004, the code
in this file was either written by David Glaude for LCDproc or
identical to the GPL'ed code or so close to it that the differences
are negligible.
For detailed information about the code analysis, please
contact the LCDproc maintainer, Peter Marschall <peter@adpm.de>
This file is hereby released under the terms below:
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
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
*/ */
#include <unistd.h> #include <unistd.h>
@@ -225,29 +253,10 @@ get_crc(unsigned char *buf, int len, int seed)
} }
/* circular buffer: */
/* v peek */
/*============================================================================
* 635 WinTest Code.
* Copyright 2001, Crystalfontz America, Inc. Written by Brent A. Crosby
* www.crystalfontz.com, brent@crystalfontz.com
*============================================================================
*/
/*---------------------------------------------------------------------------*/
/* This is some code that kind of makes the windows stuff look a little
* like the DOS/633 interrupt driven serial stuff. Basically there is a
* circular buffer, and SyncReceiveBuffer() uses ReadFile() to put data
* into the circular buffer much like the DOS stuff uses an ISR to put
* the data into the buffer. Then the rest of the functions work like
* the counterparts in the 633,
*/
/* v TailPeek */
/* -------------------------------------------------- */ /* -------------------------------------------------- */
/* ^ Tail ^ Head */ /* ^ tail ^ head */
/** initialize/empty receive buffer by resetting its pointers */ /** initialize/empty receive buffer by resetting its pointers */