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=-0.9 required=5.0 tests=BAYES_00,FORGED_GMAIL_RCVD, FREEMAIL_FROM autolearn=no autolearn_force=no version=3.4.4 X-Google-Thread: 103376,cc65ab136f46904d X-Google-NewGroupId: yes X-Google-Attributes: gida07f3367d7,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII Path: g2news1.google.com!postnews.google.com!r19g2000prm.googlegroups.com!not-for-mail From: tonyg Newsgroups: comp.lang.ada Subject: Re: GNAT.Serial_Communications Date: Tue, 19 Apr 2011 06:53:26 -0700 (PDT) Organization: http://groups.google.com Message-ID: <3671b2c4-6ed9-4a61-badc-bb7f889433f1@r19g2000prm.googlegroups.com> References: <31dd80b2-3fd3-4078-8774-c396a52c94a0@r6g2000vbz.googlegroups.com> <0d509f1c-4ca7-4595-a026-65c108558d76@bl1g2000vbb.googlegroups.com> <35515c03-f565-4fc4-ac1c-e9b7268123b3@dn9g2000vbb.googlegroups.com> <1144e8e4-4193-4ffd-a8d2-145c38993eb2@p16g2000vbi.googlegroups.com> <6301289c-f450-4d7f-8391-01e17d2555b9@z27g2000prz.googlegroups.com> NNTP-Posting-Host: 82.46.232.121 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: posting.google.com 1303221207 363 127.0.0.1 (19 Apr 2011 13:53:27 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Tue, 19 Apr 2011 13:53:27 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: r19g2000prm.googlegroups.com; posting-host=82.46.232.121; posting-account=28F2IwkAAACL1Z5nRC-dE7zuvWdbWC7P User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (X11; U; Linux x86_64; en-GB; rv:1.9.2.16) Gecko/20110323 Ubuntu/10.04 (lucid) Firefox/3.6.16,gzip(gfe) Xref: g2news1.google.com comp.lang.ada:18896 Date: 2011-04-19T06:53:26-07:00 List-Id: On Apr 19, 1:09=A0pm, Ludovic Brenta wrote: > tonyg wrote on comp.lang.ada: > > > > >> Looking at the gnat sercom package it has a total lack of options for > >> flow control. I am going to look at posix packages now and its options > >> with serial interfaces. Does anyone know if Adacore are planning to > >> add some more functionality to this package? > > > Just to let you all know ( I'm sure the world was waiting with baited > > breath!) that thanks to the help received, its now all working. I'll > > document what the problem was with some additional stuff to let future > > people know. > > > It was the flow control setting and it can be fixed by opening another > > terminal window and using the command > > > stty --file=3D/dev/ttyUSB0 -crtscts > > > However - any ada program compiled with the gnat serial communications > > package if run again will reset the port to add flow control so this > > needs it will need to be done again. Which is unfortunate for me and > > anyone with non flow control electronics. I expect this will occur > > everytime the port is opened. Out of interest do all you serial port > > tinkerers out there use flow control? > > I think you'll have to create a task-specific binding to ioctl(2) to > set the flow control options before writing to the port. =A0The fact > that ioctl(2) is variadic, non-portable and non-standard may explain > why there is nothing in GNAT.Serial_Communications related to flow > control. > > If you're not sure what arguments to pass to ioctl, maybe you can try: > > strace stty --file=3D/dev/ttyUSB0 -crtscts > > -- > Ludovic Brenta. HHhhmm a task specific binding? is that a c interface just for one task? I ask because I know I want to do this but just not sure how to, and I 've not heard of that phrase before.