From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-0.3 required=5.0 tests=BAYES_00,FREEMAIL_FROM,
	REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4
X-Google-Thread: 103376,b321573c2e5269d2
X-Google-NewGroupId: yes
X-Google-Attributes: gida07f3367d7,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news2.google.com!news.glorb.com!feeder.erje.net!feeder.news-service.com!94.75.214.39.MISMATCH!aioe.org!.POSTED!not-for-mail
From: anon@att.net
Newsgroups: comp.lang.ada
Subject: Re: Asynchronous I/O on a serial device
Date: Sun, 12 Jun 2011 21:01:32 +0000 (UTC)
Organization: Aioe.org NNTP Server
Message-ID: <it39fb$hhd$1@speranza.aioe.org>
References: <it0noa$ce3$1@munin.nbi.dk>
Reply-To: anon@anon.org
NNTP-Posting-Host: +xKyTa5daN97EsXcOQSCWQ.user.speranza.aioe.org
X-Complaints-To: abuse@aioe.org
X-Notice: Filtered by postfilter v. 0.8.2
X-Newsreader: IBM NewsReader/2 2.0
Xref: g2news2.google.com comp.lang.ada:20749
Date: 2011-06-12T21:01:32+00:00
List-Id: <comp.lang.ada>

To connect to the UART device directly you should use to use the 
Gnat.Sockets.* or AdaSockets packages.

Or you could use PolyORB packages which contains a number of serial
I/O packages. Like:  GNAT.Serial_Communications;


Download => Libre.Adacore.com


In <it0noa$ce3$1@munin.nbi.dk>, Kim Rostgaard Christensen <krc@retrospekt.dk> writes:
>Hi there
>
>I am desperately trying to implement a protocol on top of a serial 
>transport.
>
>I am running Debian, and for the moment using /dev/ttyACM0 for reading. 
>This works fine using standard the Text_IO package and In_File.
>Only, when I need to write to the device It fails because It is in 
>In_File mode - Obviously.
>Reset on the file handle gives me a USE_ERROR exception, probably due to 
>it being a special file - please correct me if I am wrong.
>
>Do I need to implement this more system-near/specific, or is there some 
>way I can do bi-directional communication like, for instance two file 
>handles. (I tried Form => "shared=yes", and it also failed).
>
>It is a usb device that emulates UART, and it seems to be contempt with 
>just about any Baud setting.
>
>/Kim