- Libresilicon-developers - libresilicon.com

Sunday meeting is on, Mumble & Riot
by David Lanzendörfer 24 Mar '19

24 Mar '19

Hi So Andreas has set up another Mumble server on mumble.libresilicon.com So please join at 2100 HKT Besides that. We've also set up a Matrix-server instance on matrix.libresilicon.com. Matrix allows end-to-end encryption, as well as audio/video communication. I think, it might be a cool idea to start using encrypted chat with video. All the things going wrong lately make my spider sense tingle. Cheers -lev

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Equipment malfunction: Delay with R&D
by David Lanzendörfer 21 Mar '19

21 Mar '19

Hi Besides the issue with the downtime of our Mumble server, now we encounter also issues in the lab. The furnaces have been offline the whole morning because the main heating unit broke and they had to repair it. The sputterer is offline until Tuesday... -.-' @Ferenc: Sorry. We can't get the measurement data done this week... :-( -lev

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Update: Issue with the Mumble server
by David Lanzendörfer 21 Mar '19

21 Mar '19

Hi folks So my dad realized that I'm right now going ballistic about the take down of the server and I can contact the guy who has removed the hard discs an give him the address where he can send it to. I should have the data of the old server in a week or two. Until then, we've gotta use a temporary VM which kleisli and I are going to setup. Cheers David

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Issue with the Mumble server
by David Lanzendörfer 20 Mar '19

20 Mar '19

Hi folks So the server on which the Mumble server has been running, has been unplugged without checking whether we've migrated the services running there, by my dad (who unfortunately has access to the rack as well) today. Besides the fact, that I will clearly never ever go visit my parents again now (except maybe after the burial to take a leak on some graves) I now have to set up another system on a server which belongs solely to me alone. The IP will change, but the hosts name will be murmur.libresilicon.com I'm sorry for you all having to share my inconvenience and am confident, that we will have the Mumble server back online next Sunday. Best regards David

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Reminder - next Mumble Session on Sunday (March 17, 2019) 13:00 UTC
by Hagen SANKOWSKI 16 Mar '19

16 Mar '19

Hello List! Just a small reminder for our next Mumble Sessions on this Sunday, March 17 at 9 p.m. Hong Kong Time - this is 13:00 UTC. Please join us as usual at our Mumble Server with IP 109.109.202.102 at Port 64738, the Channel is IC. On the agenda are (at least) this topics - Free Silicon Conference FSiC 2019 in Paris - test wafer status - other stuff around Happy to hear from you! Hagen

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Silicide formation
by David Lanzendörfer 11 Mar '19

11 Mar '19

Hi all Today we've prepared the wafer for the RTP steps we're going to perform. If successful it will reduce the resistance of the polysilicon from a few Mega-Ohm to a few 100 Ohm per square. This is a required step on our way to provide FETs with a threshold voltage of 0.8V/-0.8V I'll update you tomorrow and we will discuss the results on Sunday. Wish Victor and me luck tomorrow! Cheers David

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Mumble Outcome - list of recommended tools
by Hagen SANKOWSKI 10 Mar '19

10 Mar '19

Hello List. As we talked (again) about the tools we need for our Design Flow, here is a non-complete list of available / recommended FLOSS tools. Wikipedia has a good comparison list for EDA software (https://en.wikipedia.org/wiki/Comparison_of_EDA_software). Some tools I like to mention here. Schematic Entry =============== - gschem gschem is part of the gEDA Project (http://www.geda-project.org) with a couple of tools, originaly for PCB design. The data format of gschem is pur ASCII (http://wiki.geda-project.org/geda:file_format_spec). Usually, the file with the schematic goes to an export filter - or netlister - which generates the files for PCB input and so on. This process is quite flexible but not so user-friendly - this belongs mostly to scheme as an language this export filters are written in. While the development of gEDA/gaf becomes quite slow, a fork happend and lepton-EDA (https://github.com/lepton-eda/lepton-eda/wiki) got the better momentum on github now. I am not sure, where are the differences now en detail. Simulation ========== - ngspice ngspice is also part of the gEDA Project - and hence for lepton-EDA. There are already pages (e.g. http://wiki.geda-project.org/geda:ngspice_and_gschem), which describe how to translate the schematic entry directly into a spice deck. Waveform viewer =============== - GTKWave GTKwave is great for digital stuff - I use it on a daily basis - but lacks analog features. Evaluation needed ================= - Oregano (https://github.com/drahnr/oregano) - Electric (https://www.staticfreesoft.com) Electric is the tool, which Ludwig already forked in the latest C-based version (https://github.com/levush/electric) before it becomes Java. Notes ===== Personally I like the gEDA / lepton way of small tools, glued together by scripts and converters. BTW, there are a couple of different used scripting languages in the wild for this topic. 1. Tcl This Language is used quite often in the VLSI business, e.g. Synopsys and Mentor are using Tcl. The Synopsys Design Constraints are also Tcl. Someone also maintains ngspice with a Tcl interface as tclspice.. But regarding RMS and the "Tcl war" 2. Scheme (or Guile) is a better choice. Guile is the "official" scripting languages for the GNU Project. gEDA/gaf and lepton-EDA is using Scheme. And, in the proprietary VLSI world, Cadence (as the biggest? vendor) uses Scheme for scripting purposes (as SKILL). 3. Lua Someone might be find it interesting to use Lua for the scripting API. Small and flexible. For the beginning, for our 555, we are IMHO fine with gschem from gEDA/gaf or lepton-EDA. We can export this schematic to ngspice and simulate the spice deck. Than, we need manual effort, to go further to Magic and the Layout. Regards, Hagen.

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Fwd: Kind reminder : Free Silicon Conference (FSiC2019), final program and confirmation.
by ludwig jaffe 10 Mar '19

10 Mar '19

Hi I am not sure that I come to the conference as I am busy but if someone likes to .. Afik it is free. Cheers. Ludwig ---------- Forwarded message ---------- From: Marie-Minerve Louerat <Marie-Minerve.Louerat(a)lip6.fr> Date: Saturday, March 9, 2019 Subject: Kind reminder : Free Silicon Conference (FSiC2019), final program and confirmation. To: fsic2019(a)f-si.org Dear Future Attendee at FSIC 2019, You are registered as an Attendee at the upcoming Free Silicon Conference (FSiC2019) in Paris, March 14-16. The program has been slightly modified, the final version is available at: https://wiki.f-si.org/index.php/FSiC2019 All Attendees will be offered lunch and dinner on campus (at no cost). Should you have not done so yet, I am kindly asking you to confirm your attendance by filling the following dudle **Monday March 11 the latest**: https://dudle.f-si.org/fsic2019-attendees/ In case of need, entries can be re-edited by clicking on the "pencil" icon on the left of the name. If possible, please indicate the full name in the dudle. In case of privacy concerns, feel free to use only the first name, or to write an email to fsic2019(a)f-si.org . The coffee breaks, teak breaks and lunch breaks will be outside with a roof, it might be windy and cold, check: http://www.meteociel.fr/previsions/27821/paris_5eme_arrondissement.htm Best regards, Marie-Minerve Louerat -- Marie-Minerve Louerat Equipe CIAN du Laboratoire LIP6 Sorbonne Université, CNRS Campus Pierre et Marie Curie 4 Place Jussieu, 75005 Paris, France +33 1 44 27 71 08 marie-minerve.louerat(a)lip6.fr -- Send from mobile phone with autocorrection / autofill. Blame my phone for typos.

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555 exemplification
by Hagen SANKOWSKI 10 Mar '19

10 Mar '19

Hello List. Just some exemplifications I found for the (CMOS) 555. http://www.righto.com/2016/02/555-timer-teardown-inside-worlds-most.html http://www.righto.com/2016/04/teardown-of-cmos-555-timer-chip-how.html https://zeptobars.com/en/read/NXP-7555-555-timer Happy Reading! Hagen.

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LibrePlanet 2019
by Devon Sean McCullough 10 Mar '19

10 Mar '19

The https://LibrePlanet.org/2019 conference at MIT CSAIL building 32 on Saturday-Sunday 23-24 March 2019, two weekends from now. Peace --Devon

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