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ru.linux
- RU.LINUX ---------------------------------------------------------------------
From : Svyatoslav Abramenkov 2:464/8088.100 11 Aug 2004 17:08:41
To : Nick Gazaloff
Subject : OCR
--------------------------------------------------------------------------------
At 10 Aug 04 16:00:07, Nick Gazaloff wrote to Svyatoslav Abramenkov:
>> >> а второй кабель - под LPT, но, afaik, в Linux 2.4 нет поддержки
>> ECP/EPP >> - только nibble mode.
>> NG> Есть. less /usr/src/linux/Documentation/parport.txt. Как минимум,
>> задать
>> NG> прерывание -- будет EPP. Задать еще и DMA -- будет ECP (правда, ECP
>> с NG> принтером у меня так и не завелся).
>> В PLIP кроме nibble mode больше ничего не реализовали.
NG> /usr/src/linux/Documentation/networking/PLIP.txt
NG> PLIP hardware interconnection
NG> PLIP uses several different data transfer methods. The first (and the
NG> only one implemented in the early version of the code) uses a standard
NG> printer "null" cable to transfer data four bits at a time using
NG> data bit outputs connected to status bit inputs.
NG> The second data transfer method relies on both machines having
NG> bi-directional parallel ports, rather than output-only ``printer''
NG> ports. This allows byte-wide transfers and avoids reconstructing
NG> nibbles into bytes, leading to much faster transfers.
>===== Start cut [/usr/src/kernel-source-2.4.26/drivers/net/plip.c] =====<
/* $Id: plip.c,v 1.3.6.2 1997/04/16 15:07:56 phil Exp $ */
/* PLIP: A parallel port "network" driver for Linux. */
/* This driver is for parallel port with 5-bit cable (LapLink (R) cable). */
/*
* Authors: Donald Becker <becker@scyld.com>
* Tommy Thorn <thorn@daimi.aau.dk>
* Tanabe Hiroyasu <hiro@sanpo.t.u-tokyo.ac.jp>
* Alan Cox <gw4pts@gw4pts.ampr.org>
* Peter Bauer <100136.3530@compuserve.com>
* Niibe Yutaka <gniibe@mri.co.jp>
* Nimrod Zimerman <zimerman@mailandnews.com>
*
* Enhancements:
* Modularization and ifreq/ifmap support by Alan Cox.
* Rewritten by Niibe Yutaka.
* parport-sharing awareness code by Philip Blundell.
* SMP locking by Niibe Yutaka.
* Support for parallel ports with no IRQ (poll mode),
* Modifications to use the parallel port API
* by Nimrod Zimerman.
*
* Fixes:
* Niibe Yutaka
* - Module initialization.
* - MTU fix.
* - Make sure other end is OK, before sending a packet.
* - Fix immediate timer problem.
*
* Al Viro
* - Changed {enable,disable}_irq handling to make it work
* with new ("stack") semantics.
*
* 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.
*/
/*
* Original version and the name 'PLIP' from Donald Becker <becker@scyld.com>
* inspired by Russ Nelson's parallel port packet driver.
*
* NOTE:
* Tanabe Hiroyasu had changed the protocol, and it was in Linux v1.0.
* Because of the necessity to communicate to DOS machines with the
* Crynwr packet driver, Peter Bauer changed the protocol again
* back to original protocol.
*
* This version follows original PLIP protocol.
* So, this PLIP can't communicate the PLIP of Linux v1.0.
*/
/*
* To use with DOS box, please do (Turn on ARP switch):
* # ifconfig plip[0-2] arp
*/
static const char version[] = "NET3 PLIP version 2.4-parport gniibe@mri.co.jp\
n";
/*
Sources:
Ideas and protocols came from Russ Nelson's <nelson@crynwr.com>
"parallel.asm" parallel port packet driver.
The "Crynwr" parallel port standard specifies the following protocol:
Trigger by sending nibble '0x8' (this causes interrupt on other end)
count-low octet
count-high octet
... data octets
checksum octet
Each octet is sent as <wait for rx. '0x1?'> <send 0x10+(octet&0x0F)>
<wait for rx. '0x0?'> <send 0x00+((octet>>4)&0x0F)>
The packet is encapsulated as if it were ethernet.
The cable used is a de facto standard parallel null cable -- sold as
a "LapLink" cable by various places. You'll need a 12-conductor cable to
make one yourself. The wiring is:
SLCTIN 17 - 17
GROUND 25 - 25
D0->ERROR 2 - 15 15 - 2
D1->SLCT 3 - 13 13 - 3
D2->PAPOUT 4 - 12 12 - 4
D3->ACK 5 - 10 10 - 5
D4->BUSY 6 - 11 11 - 6
Do not connect the other pins. They are
D5,D6,D7 are 7,8,9
STROBE is 1, FEED is 14, INIT is 16
extra grounds are 18,19,20,21,22,23,24
*/
>===== End cut [/usr/src/kernel-source-2.4.26/drivers/net/plip.c] =====<
Hи здесь, ни в оставшемся коде ты не найдёшь ничего, предназначенного для
работы не в nibble mode, как, кстати, и схемы кабеля для такого случая.
--
Svyatoslav <absolute_sh@mail.ru>
[Registered Linux user #219421]
--- QDed/Linux
* Origin: AbSolute Soft&Hard (2:464/8088.100)
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Re: Ускорить работу эхотага, а именно X Window |
Alexander Drozdov |
30 Jul 2004 10:19:54 |
 (no subject) |
Yoric Kotchukov |
01 Aug 2004 23:45:45 |
 Re: (no subject) |
Nick Gazaloff |
02 Aug 2004 17:53:50 |
 Re: (no subject) |
Victor Wagner |
03 Aug 2004 09:17:48 |
  Re: (no subject) |
Peter Lemenkov |
04 Aug 2004 01:12:43 |
|
OCR |
Alexander Lubyagin |
03 Aug 2004 11:09:35 |
|
Re: OCR |
Aleksey Barabanov |
03 Aug 2004 19:03:07 |
 OCR |
Alexander Lubyagin |
03 Aug 2004 23:27:01 |
 Re: OCR |
Aleksey Barabanov |
04 Aug 2004 13:53:24 |
|
OCR |
Alexander Lubyagin |
04 Aug 2004 00:12:17 |
|
Re: OCR |
Victor Wagner |
04 Aug 2004 10:46:28 |
|
OCR |
Alexander Lubyagin |
04 Aug 2004 22:56:58 |
 Re: OCR |
Victor Wagner |
05 Aug 2004 09:18:30 |
|
Re: OCR |
Alex Korchmar |
05 Aug 2004 18:04:28 |
|
OCR |
Alexander Lubyagin |
06 Aug 2004 10:40:12 |
|
Re: OCR |
Nick Gazaloff |
06 Aug 2004 23:22:23 |
|
OCR |
Alexander Lubyagin |
07 Aug 2004 11:20:20 |
|
OCR |
Svyatoslav Abramenkov |
09 Aug 2004 18:20:59 |
|
Re: OCR |
Nick Gazaloff |
10 Aug 2004 17:00:07 |
|
OCR |
Svyatoslav Abramenkov |
11 Aug 2004 17:08:41 |
|
Re: OCR |
Victor Wagner |
09 Aug 2004 13:46:41 |
|
OCR |
Alexander Lubyagin |
06 Aug 2004 13:25:05 |
|
Re: OCR |
Aleksey Barabanov |
04 Aug 2004 13:33:26 |
|
OCR |
Rustam Chernotkach |
09 Aug 2004 10:29:04 |
|
OCR |
Nick Pletnev |
04 Aug 2004 12:14:39 |
|
Re: OCR |
Aleksey Barabanov |
04 Aug 2004 13:33:26 |
|
OCR |
Nick Pletnev |
04 Aug 2004 12:12:28 |
|
Re: (no subject) |
Yoric Kotchukov |
03 Aug 2004 13:48:14 |
|
Re: (no subject) |
Alexander Drozdov |
03 Aug 2004 10:28:48 |
|
Re: Ускорить работу эхотага, а именно X Window |
Oleg Deribas |
02 Aug 2004 10:52:12 |
|
Re: Ускорить работу эхотага, а именно X Window |
Jahor Miadzviedziew |
02 Aug 2004 20:49:55 |
|
Re: Ускорить работу эхотага, а именно X Window |
Serge |
03 Aug 2004 06:51:23 |
|
Re: Ускорить работу эхотага, а именно X Window |
Jahor Miadzviedziew |
04 Aug 2004 20:03:02 |
|
Re: Ускорить работу эхотага, а именно X Window |
Serge |
06 Aug 2004 08:10:08 |
|
Re: Ускорить работу эхотага, а именно X Window |
Alexander Drozdov |
03 Aug 2004 10:51:46 |
|
Re: Ускорить работу эхотага, а именно X Window |
Jahor Miadzviedziew |
04 Aug 2004 20:05:37 |
|
Re: Ускорить работу эхотага, а именно X Window |
Oleg Deribas |
03 Aug 2004 03:59:56 |
|
Re: Ускорить работу эхотага, а именно X Window |
Nick Gazaloff |
03 Aug 2004 22:11:05 |
|
Re:Ускорить работу эхотага, а именно X Window |
Peter Lemenkov |
04 Aug 2004 01:13:27 |
|
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