March 2013 - Pharo-dev - lists.pharo.org

[Pharo-project] GSoC idea - Smalltalk Modbus Industrial Communications Protocol
by Ben Coman March 28, 2013

March 28, 2013

Janko MivÅ¡ek wrote: > Dear Pharoers, > > Ideas are slowly coming, 14 so far, but this is way below the 30+ in > previous years. So, stretch your brain, come with some more ideas, which > will be interesting for potential students and of course useful for our > community. Students you are again welcome to propose such idea by your > own. One student idea for now! > > Ideas so far: http://gsoc2013.esug.org/ideas > > To propose an idea just respond to this post by fulfilling this idea > template: > > Title: Smalltalk Modbus Industrial Communications Protocol Level: Intermediate Possible mentor: Ben Coman - I can provide the domain knowledge and general programming assistance Possible second mentor: Someone to help advise on good Smalltalk architectural patterns Description: Smalltalk has high potential as a SCADA (Supervisor Control And Data Acquisition) platform for industrial plant automation. A SCADA system provides a real-time animated interface for plant operators to monitor and control industrial processes, by providing graphical mimics of meters, gauges, valves, motors, tanks and field start/stop buttons[1]. A pre-requisite of this is communicating with a PLC (Programmable Logic Controller) to which the electrical wiring of the plant sensor and control devices are connected. The de facto communications protocol for SCADA/PLC communication is Modbus. This project will implement the Modbus protocol in Smalltalk. Technical Details: First published in 1979, Modbus is a application level master-slave/client-server communications protocol used for SCADA/PLC communications. Much of its popularity as a de facto standard is due to its relatively simple implementation compared to other industrial communications protocols. The student will use Modbus specifications [2] the student will implement ModbusASCII, ModbusRTU and ModbusTCP. This will be done first using a simulator[3], then later using a physical I/O module [4] to control some real world devices. [1] Sample animation at http://en.wikipedia.org/wiki/SCADA (circles are motors, triangles are valves, half circles are valve controllers.) [2] http://www.modbus.org/specs.php (about 50 pages - not all required) [2] http://www.plcsimulator.org/Home (or similar) [3] http://www.audon.co.uk/modbusio/mbiodaio.html (or similar) Benefits to the Student: * gain experience in client/server programming * gain experience in a widely used industrial communication protocol. * practice breaking down and implementing a real-world specification - good training for the workplace. * controlling the real world from Smalltalk will be cool * a local industrial plant might be approached to help with a practical test case, maybe leading to ongoing employment. Benefits to the Community: This project expands the industry segments into which the Smalltalk community can consult. It provides a foundation for development of a SCADA system in Smalltalk. The industrial automation industry is a great source of bespoke application development. It is a service industry where the source code is owned by the client, since every industrial plant is different requiring a custom written SCADA application. Many plants run 24x7, so ongoing modifications need to be made online without shutting down the operator's console, for which Smalltalk is ideal (not all current commercial SCADA platforms can do this). cheers -ben

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[Pharo-project] ClassTestCase should be in SUnit not in Tests, agree?
by Eliot Miranda March 27, 2013

March 27, 2013

Hi All, I'm trying to load NetworkTests into a Newspeak image. This image doesn't include Tests, but does contain SUnit and SUnitGUI. I can't load NetworkTests because it depends on ClassTestCase which is in Tests-Utilities. IMO ClassTestCase should be in SUnit. Any disagreements? Any agreements? Mind if I move it there? -- best, Eliot

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Re: [Pharo-project] in anybody out there? who uses 2.0?
by Stephan Eggermont March 27, 2013

March 27, 2013

Esteban wrote: >Here in Pharo headquarters we are shock that there are just 10 new bugs reported for 2.0 after the release... >So... I wonder... is that because we made a really cool release, or just because nobody is using it? It is a cool release and we are using it. Sorry about the lack of issues, I just added 10158 for you. We have been mostly doing a lot of work making our stuff work on Pharo 2.0. That mostly involves changing our code, not Pharo 2.0. So I'd say it is stable enough. Just keep up the speed. Cheers, Stephan

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[Pharo-project] Penelope the Monkey is wrong about email address validity
by Frank Shearar March 27, 2013

March 27, 2013

Am I the only one to use an email address containing a . ? Penelope doesn't recognise frank.shearar(a)gmail.com as a valid address, which is unfortunate. I've registered with an old email address in the meantime, but we'll want to flag this up as a problem with someone. frank

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[Pharo-project] GSoC idea: Spec over Aida component model
by Janko MivÅ¡ek March 27, 2013

March 27, 2013

Guys, would be this an interesting project to advance Smalltalk UI more toward bleeding edge again, after 30 years, when we were there already with MVC based GUI? Spec project have a potential here and Spec over web frameworks to build fully desktop-capable web apps seems to be achievable. Spec over Amber (who will propose that?), Spec over Aida, Spec over Seaside? Benjamin, would you be a co-mentor of that project? Title: Spec over Aida for desktop-capable Web Apps Level: advanced Possible mentor: Janko MivÅ¡ek Possible second mentor: Benjamin? Description Spec as a means to describe and generate GUI has a potential to help building web applications as well. And because one of Spec goals is to become a platform/framework independent, this project has a goal to extend Aida component model for building Single Page web apps to become Spec-aware Technical Details Aida has a component model for building so called Single Page web UIs, capable of composing a hierarchy of so called web widgets, which are standalone reusable components, together with hierarchical web form support. Spec as descriptor and generator of UI is therefore a natural extension of Aida component model. When a HTML5 Web Components standard will be ready, Aida component model can be easily extended to support that standard as well, together with Spec (and maybe UIBuilder too?). Benefits to the Student Student will acquire the knowledge and experience of building desktop-capable UIs on the web using HTML5 approach. Benefits to the Community Spec has a potential to become a de-facto standard way of describing User Interfaces for Smalltalk projects from desktop to web and mobile, on a dialect and web framework neutral way. This project can contribute a piece toward that goal. Best regards Janko -- Janko MivÅ¡ek Aida/Web Smalltalk Web Application Server http://www.aidaweb.si

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[Pharo-project] [ANN] Pomodoro for Pharo 2.0
by Torsten Bergmann March 27, 2013

March 27, 2013

MartinW wrote: >- When you drag and drop a finished (red) Pomodoro Morph the whenFinishedDo: >block is executed every time on dropping the morph. Ahh ... I see. I fixed that. >- The clock starts with 4 seconds and displays the 'Pomodoro finished' >notification 1 second after the progress bar and the clock show zero. Reason is that the stopwatch is more precise (nanoseconds) and the pomodoro is only down to "seconds precision" Usually you have a pomodoro in minute precision (25 minutes), such short pomodoros of 5 seconds make no sense and the example with 5 seconds was only to demonstrate the features without waiting too long for the demo result. But I fixed this as well so it is clean. Just load the new one from the config browser (available in 2.0 and 3.0). Bye T.

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[Pharo-project] Some issues with UDP sockets in Pharo 1.4/Pharo 2.0
by Holger Hans Peter Freyther March 27, 2013

March 27, 2013

Hi, I am porting a tooling class that I wrote on GST for my SIP and MGCP code to Pharo. This class will create a socket and then fork a RX and TX process. I have some issues with 'stopping' the socket. I have created an example that shows the issue in Pharo 2.0 and Pharo 1.4 with the pharovm (and to have more debug output with a re-compiled one). | s rx | s := Socket newUDP. rx := [ [s waitForData. s halt] on: ConnectionClosed do: [ s halt] ] fork. "Wait for the process to hit the readSemaphore" (Delay forSeconds: 3) wait. s close. My expectation is that I will get the ConnectionClosed signal or at least that >>#waitForData will return once the socket is closed. This is based on reading the comment of >>#waitForData. The Socket>>#waitForData documentation reads like this: "Wait for data to arrive. This method will block until data is available or the socket is closed. If the socket is closed a ConnectionClosed exception will be signaled." I had a look at the socket plugin and the following is happening. First aio is disabled, the state set to ThisEndClosed, then ::close is called and in the above case the result is '0' and the following code will be executed: else if (0 == result) { /* close completed synchronously */ SOCKETSTATE(s)= Unconnected; FPRINTF((stderr, "closeConnection: disconnected\n")); SOCKET(s)= -1; } this means that my 'rx' process will happily wait on the readSemaphore of the Socket and will never be woken up. My question are probably: 1.) Is this the intended behavior for Socket>>#close and Socket>>#waitForData? 2.) How should I terminate my RX process? kind regards holger PS: The issue is probably socket specific and not related to UDP.

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[Pharo-project] [FugBugz] Simplififactions Issue tracker
by Marcus Denker March 27, 2013

March 27, 2013

Hi, I simplified things a bit -> just one Milestone for 3.0 -> "Active" is retired, the default Active state is "Work Needed" In addtion, the filters are simplified. -> dedicted "Integration" and "Review" Filteres. They cross cut all Milestones, as we should quickly integrate 1.4 and 2.0 fixes. the "3.0 Work Needed" shows all issues tagged 3.0 that are not yet resolved. This means -> you want to review, take the review filter -> you want to code, take a "Work needed" filter.

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[Pharo-project] [update 3.0] #30014
by Marcus Denker March 27, 2013

March 27, 2013

30014 ----- 10138 Config browser does not work in Pharo 3.0, requires new repo https://pharo.fogbugz.com/f/cases/10138/ 10111 DictionaryTest does not properly test subclass functionality https://pharo.fogbugz.com/f/cases/10111 7465 version printing command line needs modifiers https://pharo.fogbugz.com/f/cases/7465 Diff information: http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/Tools-MarcusDenker.1069 http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/System-CommandLine-MarcusDen… http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/KernelTests-MarcusDenker.479 http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/CollectionsTests-MarcusDenke… http://smalltalkhub.com/#!/~Pharo/Pharo30/diff/Collections-Unordered-Marcus…

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Re: [Pharo-project] pharoconf | mooseday | 2013 - 2nd call for participation
by Tudor Girba March 26, 2013

March 26, 2013

Just a reminder: if you plan to attend PharoConf and/or MooseDay, please register as soon as possible. Cheers, Doru Begin forwarded message: > From: Tudor Girba <tudor(a)tudorgirba.com> > Subject: [Esug-list] pharoconf | mooseday | 2013 - call for participation > Date: March 17, 2013 8:56:41 PM GMT+01:00 > To: Moose-dev Moose Dev <moose-dev(a)iam.unibe.ch>, "Pharo-project(a)lists.gforge.inria.fr Development" <pharo-project(a)lists.gforge.inria.fr>, A friendly place where any question about pharo is welcome <pharo-users(a)lists.gforge.inria.fr>, ESUG Mailing list <esug-list(a)lists.esug.org>, Seaside - general discussion <seaside(a)lists.squeakfoundation.org>, vwnc nc <vwnc(a)cs.uiuc.edu> > > (please distribute) > > We are happy to invite you to the PharoConf | MooseDay | 2013: > http://scg.unibe.ch/wiki/events/pharoconf-mooseday-2013 > > The conference will take place at the University of Bern during April 2-4: > - PharoConf (April 2,3) > - MooseDay (April 4) > > The conference will be free and will even include a free lunch. Yes, free lunch. No trick. > We only kindly ask you to register online for each event as soon as possible. > > STUDENT SPONSORSHIPS: > > ESUG will sponsor the travel of up to 10 students with 150 EUR / person. > Please apply for sponsorship by mail at esug-info(a)esug.org. First-come, first-served. > > The conference sponsors will sponsor the travel of up to 10 students with up to 200 CHF / person. > Please apply for sponsorship before the conference by mail at tudor(a)tudorgirba.com. First-come, first-served. > > IMPORTANT > If you are a student, please bring your student cards with you to help us limit the lunch costs. > > Cheers, > The organizers > _______________________________________________ > Esug-list mailing list > Esug-list(a)lists.esug.org > http://lists.esug.org/mailman/listinfo/esug-list_lists.esug.org -- www.tudorgirba.com "Next time you see your life passing by, say 'hi' and get to know her."

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