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, REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!mx02.eternal-september.org!feeder.eternal-september.org!feeder.erje.net!eu.feeder.erje.net!news.etla.org!aioe.org!.POSTED!not-for-mail From: "Dmitry A. Kazakov" Newsgroups: comp.lang.ada Subject: Re: silly ravenscar question Date: Tue, 24 Feb 2015 11:29:21 +0100 Organization: cbb software GmbH Message-ID: References: <8e30f54c-81c4-4861-897c-bb6c563c76e8@googlegroups.com> Reply-To: mailbox@dmitry-kazakov.de NNTP-Posting-Host: OpkKbm9QwHUq0Y4SxjI2mw.user.speranza.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@aioe.org User-Agent: 40tude_Dialog/2.0.15.1 X-Notice: Filtered by postfilter v. 0.8.2 Xref: news.eternal-september.org comp.lang.ada:25004 Date: 2015-02-24T11:29:21+01:00 List-Id: On Tue, 24 Feb 2015 01:07:31 -0800 (PST), jan.de.kruyf@gmail.com wrote: > I am busy doing a very light ethernet fieldbus for a few Olimex stm34 boards and a pc. You mean the boards will be sort of terminals. And the master will be? Which cycles you are talking about, 1ms, 0.1ms, 0.01ms? > and EtherCAT needs more involved hardware (although it is very fast) EtherCAT does not need special hardware. If you mean Beckhoff's piggyback, you don't have to use it. You can do all it does with a plain board and raw Ethernet. Admittedly it would be a lot of work and EtherCAT slave protocol (all upper levels) is a horrific mess. > Is there any interest in the community? I am willing to put it under GPL. If that would not hinder selling the terminals to the end customers without exposing the sources... All existing fieldbuses are extremely poor designed, in my view. But I doubt it would be a work for one man. -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de