From: "Stuart MacDonald" <stuartm@connecttech.com>
To: Linux PPP <linuxppp@indiainfo.com>, linux-serial@vger.kernel.org
Subject: Re: RS485 communicatio
Date: Sun, 16 Mar 2003 18:47:02 -0500 [thread overview]
Message-ID: <070201c2ec16$586a6ac0$294b82ce@connecttech.com> (raw)
In-Reply-To: 20030313061505.5944.qmail@indiainfo.com
From: "Linux PPP" <linuxppp@indiainfo.com>
> am currently working on PPP over serial interface (RS485) in linux
2.4.2-2. I believe RS485 half duplex system and hence only one can transmit
at a time. And for RS485 we basicaly use Master-Slave or Primary-Secondary
kind of communication. I don't know how to achieve the
[snip]
> This point to point communication worked fine with RS485 interface. If i
had to connect one more node what i need to do. Please clarify with the
following
>
> i) Whether the existing pppd takes care of the RS485 with multi node , if
so how do i manage giving commands
PPP is designed to connect two logical endpoints together. 485
multidrop is a one to many setup, which seems to me is logically
incompatible with PPP. At least, simultaneously.
..Stu
--
We make multiport serial boards.
<http://www.connecttech.com>
(800) 426-8979
next prev parent reply other threads:[~2003-03-16 23:47 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-13 6:15 RS485 communicatio Linux PPP
2003-03-14 0:05 ` whitnl73
2003-03-15 0:36 ` whitnl73
2003-03-16 23:47 ` Stuart MacDonald [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-03-13 16:56 Ed Vance
2003-03-13 17:46 ` Richard B. Johnson
2003-03-15 19:46 ` Pavel Machek
2003-03-16 19:57 ` Alan Cox
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