Re: Help with serial/tty2 communication (write ok, read NOT).

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#134

From: Scott Henry
Date: Mon, 12 Feb 1996 18:09

27 lines
1901 bytes

In article <TROYS.96Feb12160640@donald.wormald.com.au> troys@donald.wormald.com.au (Troy Stephen) writes:

> I have a similar problem, and thought it might as well continue on this thread.

> Also, I am a bit concerned about the reliability of the serial ports at
> high baud rates, especially when the man page for SERIAL(7) says:

> "...Each line may be independently set to run at any of several speeds,
> as high as 19,200 or even 38,400 bps."

> What are people's experience with this?  I need to run at 38.4kbaud and
> my application needs to read the 27 byte packets at 60hz.  What are my
> chances of getting this to work reliably?

Methinks the man page needs to be updated...  38400 works perfectly
fine on R3k Indigos and more recent machines.  You *may* need to
worry about flow control (I don't know how big the serial buffer
is), but people get away with modem cables missing RTS on 1500 byte
PPP/SLIP packets at 38400, so you are probably OK.

--
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
 Scott Henry <scotth@sgi.com> / Help! My disclaimer is missing!
 Networking Services,        / GIGO *really* means: Garbage in, Gospel Out
 Silicon Graphics, Inc      / 
  <a href="http://reality.sgi.com/employees/scotth/">home page</a>

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Message-ID: <SCOTTH.96Feb12100912@skuld.corp.sgi.com>

Path: arc1-ca.pugleaf.net!news.corp.sgi.com!news!scotth

References: <4ebkuaINNdqp@retriever.cs.umbc.edu> <4ef62p$8t2@ni1.ni.net> <TROYS.96Feb12160640@donald.wormald.com.au>

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Path: arc1-ca.pugleaf.net!news.corp.sgi.com!news!scotth
From: scotth@sgi.com (Scott Henry)
Newsgroups: comp.sys.sgi.hardware,comp.lang.c++
Subject: Re: Help with serial/tty2 communication (write ok, read NOT).
Date: 12 Feb 1996 18:09:12 GMT
Organization: Silicon Graphics Inc, Mountain View, CA
Message-ID: <SCOTTH.96Feb12100912@skuld.corp.sgi.com>
References: <4ebkuaINNdqp@retriever.cs.umbc.edu> <4ef62p$8t2@ni1.ni.net>
 <TROYS.96Feb12160640@donald.wormald.com.au>
Reply-To: scotth@sgi.com
NNTP-Posting-Host: skuld.corp.sgi.com
In-reply-to: troys@donald.wormald.com.au's message of Mon, 12 Feb 1996 06:06:39 GMT

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