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by darkstar
Thu Dec 20, 2012 12:34 pm
Forum: Raspbian
Topic: Initial Tiny Boot System
Replies: 16
Views: 2334

Re: Initial Tiny Boot System

Preloaded cards: since the people most likely to buy preloaded cards are the very people least likely to be able to sort out problems, it seems to me (apart from they seem to be being sold a pup) there should be a preload image especially for them. So if all those distributors selling preloaded car...
by darkstar
Thu Dec 20, 2012 11:21 am
Forum: Raspbian
Topic: Initial Tiny Boot System
Replies: 16
Views: 2334

Re: Initial Tiny Boot System

What is the purpose of this tinyboot system? Two possibilities suggest themselves: netbooting or remote upgrading. Traditional netbooting is where you have a minimal boot image, traditionally in the netcard itself, which boots and grabs a floppy image over the net to a ramdisk. Then control flips to...
by darkstar
Fri Nov 09, 2012 7:10 am
Forum: Networking and servers
Topic: hp-toolbox/hplip
Replies: 0
Views: 835

hp-toolbox/hplip

Anybody setup HP all-in-ones to a RPi? Setup of a RPi as a CUPS server I believe is fairly straightforward, but what about all-in-ones? What one would like is to be able to have the hp-toolbox GUI run on your desktop machine but have the HP usb printer on the RPi. From the desktop you can then check...
by darkstar
Mon Oct 22, 2012 9:55 am
Forum: Raspbian
Topic: texlive supports armhf
Replies: 2
Views: 936

Re: texlive supports armhf

Texlive on tug.org says: "armv6 hf (Raspberry Pi)"[1]. At the moment the binaries are done by a "3rd party" maintainer. Presumably if these binaries work without any hassle (i.e. no folks complaining etc) the the maintainer will become part of the texlive team and so on the DVD. One whinge is that t...
by darkstar
Sun Oct 21, 2012 7:49 am
Forum: Raspbian
Topic: texlive supports armhf
Replies: 2
Views: 936

texlive supports armhf

Spotted on tug.org that there is now an armhf binary for texlive. This means that those that prefer to use the texlive delivery mechanism can now update their TeX installation independently from apt-get. This lets ones TeX/LaTeX more closely track CTAN. Also it ensures that all the machines, whether...
by darkstar
Fri Oct 05, 2012 6:31 am
Forum: Other programming languages
Topic: Lua on the Raspberry Pi
Replies: 14
Views: 7152

Re: Lua on the Raspberry Pi

The embeddedness of lua and its VM is one of its attractive features. Because lua lives within a host application its communication, via the exposed API, is under the control of the original programmer, so it is sortof sandboxed. If the C/C++ programmer wishes to restrict the lua code's scope then h...
by darkstar
Sun Sep 30, 2012 6:13 am
Forum: Other programming languages
Topic: Lua on the Raspberry Pi
Replies: 14
Views: 7152

Re: Lua on the Raspberry Pi

Lua is not a development language per-se (like Perl, Python, C++), it is embedded. That is to say that it is there to add scripting ability to another application. Of course the "application" can be a minimal bit of C that just allows it to do basic console and file io (as we see in the lua ELF). ....
by darkstar
Sat Sep 29, 2012 9:44 am
Forum: Other programming languages
Topic: Lua on the Raspberry Pi
Replies: 14
Views: 7152

Re: Lua on the Raspberry Pi

Lua is not a development language per-se (like Perl, Python, C++), it is embedded. That is to say that it is there to add scripting ability to another application. Of course the "application" can be a minimal bit of C that just allows it to do basic console and file io (as we see in the lua ELF). Se...
by darkstar
Mon Sep 24, 2012 11:20 am
Forum: General discussion
Topic: LaTeX on RPi
Replies: 9
Views: 13828

Re: LaTeX on RPi

Two ways to install texlive on a linux/debian box: via your traditional package manager and direct from the DVD/usb/internet image. The advantage of using texlive directly is that its updates are indenpendant of the distro's package maintainers. Armel is on the standard texlive distro. An armhf bina...
by darkstar
Wed Sep 12, 2012 7:10 am
Forum: Raspbian
Topic: resize sd don't work
Replies: 3
Views: 837

Re: resize sd don't work

Now you say: doing the resize does make technical sense but it's not terribly userfriendly. Having done the resize on my PC with gpartd, it does take quite a while. With gpartd you can watch the progress bar crawls along. With the resize script it has no log interface so you can't see how it's getti...
by darkstar
Tue Sep 11, 2012 6:44 am
Forum: Raspbian
Topic: resize sd don't work
Replies: 3
Views: 837

resize sd don't work

On first boot of a new image you are prompted to resize the SD filesystem. The resize failed consistently when I tried it.

My card is on the "good list", but it failed. Then on reboot it hangs: not suprisingly cos the FS is trashed.

The only solution is to use gpartd on my host PC.

Fix?
by darkstar
Wed Aug 29, 2012 4:05 pm
Forum: For sale
Topic: Waterproof case?
Replies: 31
Views: 47652

Re: Waterproof case?

A futher point about waterproof cases is that of ensuring that there is no flexing of the perforated box side through which the connectors would go. For where waterproof cables are inserted then the cables can be sealed into the case side/end. See how BT (Open Reach) seal their under-pavement units....
by darkstar
Tue Aug 28, 2012 4:47 pm
Forum: For sale
Topic: Waterproof case?
Replies: 31
Views: 47652

Re: Waterproof case?

I would use a tupperware (or clone) case, waterproof connectors with wires on the back to plug to the RPi, then seal the holes with lots of silicone. Note that when silicone goes off it releases lots of acetic acid, so I would reckon that you should leave the case open for a day or so to ensure that...
by darkstar
Tue Aug 28, 2012 4:27 pm
Forum: Raspbian
Topic: armel binaries
Replies: 6
Views: 1652

Re: armel binaries

The reason that texlive is "special" is that there are two ways to ensure you have an uptodate texlive: via apt-get for your distro or via the separate texlive route. When you install texlive via the DVD (usb stick in our case), it installs the texlive tree (macros and binaries) in its own directory...
by darkstar
Tue Aug 28, 2012 5:58 am
Forum: Raspbian
Topic: armel binaries
Replies: 6
Views: 1652

Re: armel binaries

Actually tested with a bit of lua, and no the armel fp doesn't work. ------------ a= 1.1 io.write('a=' .. a .. '\n') ------------ If you run armel texlua you get "a=0", rather than what you want. So I guess that when generating the PDF luatex has a bit of floating point that silently barfs which the...
by darkstar
Sat Aug 25, 2012 7:36 am
Forum: Raspbian
Topic: armel binaries
Replies: 6
Views: 1652

armel binaries

Should armel binaries run properly on armhf?

I have installed the new texlive DVD contents (via a usbstick) and it mostly works.

However luatex produces bad PDFs for some reason. Ideas why? And fixes?

If it is a new binary that's needed then I reckon that the texlive team would like to know.
by darkstar
Thu Jul 19, 2012 3:02 pm
Forum: Raspbian
Topic: LaTeX/lualatex
Replies: 2
Views: 3091

Re: LaTeX/lualatex

It's not a problem per-se, just bemoaning lag for texlive. Texlive takes more uptodate (La)TeX from CTAN so it is the preferred source of TeX rather than rely on your distro's. Each year we get a DVD/stable download to apply to our machines. "Obviously" raspbian will have the armhf compilation of pd...
by darkstar
Thu Jul 19, 2012 8:36 am
Forum: Raspbian
Topic: LaTeX/lualatex
Replies: 2
Views: 3091

LaTeX/lualatex

A) Anybody with experience of LaTeX/lualatex on the pi? B) Texlive timings are somewhat unfortunate in that they are on binary freeze at the moment so we would have to wait for 2013 for a possible hardfloat version. My understanding is that texlive 2012 will include armel. Presumably this will run o...
by darkstar
Wed Jun 13, 2012 8:02 am
Forum: General discussion
Topic: LaTeX on RPi
Replies: 9
Views: 13828

LaTeX on RPi

Being a LaTeX user I wanted to see if it was any good on the RPi: yes but a little slow (about like running it on a 10yo PC). Else it works fine. Note that it originates from the 1970s when university computers were less powerful than our phones, and so it is quite efficient. You supply a text file ...
by darkstar
Tue Apr 24, 2012 6:30 am
Forum: Other programming languages
Topic: lua language?
Replies: 11
Views: 19303

Re: lua language?

<t>Glad you guys like the idea.<br/> <br/> What I had in mind as an educational/debug app was some kind of wrapper for the gpio and enable interactive mode. This can be done either as a C/C++ gpio module loaded into the stock lua app or compiled/linked into out own minimal C/C++ app.<br/> <br/> Let ...
by darkstar
Mon Apr 23, 2012 2:37 pm
Forum: General discussion
Topic: LaTeX on RPi
Replies: 0
Views: 1014

Re: LaTeX on RPi

There is a strong rumour/hope that texlive will be available for the RPi. It's intended have the appropriate arm binaries on this summer's DVD.
by darkstar
Mon Apr 23, 2012 2:33 pm
Forum: Other programming languages
Topic: lua language?
Replies: 11
Views: 19303

Re: lua language?

<t>I haven't seen lua mentioned anywhere for the RPi.<br/> <br/> I have used it and it's a nice lightweight interpretted embedded language. It is lighter and more stable than say Python.<br/> <br/> It is intended as a scripting language. Used by, amongst other apps, luatex and Adobe Lightroom.<br/> ...
by darkstar
Thu Feb 09, 2012 8:01 am
Forum: Other projects
Topic: Weather station. With gprs updates and 12V
Replies: 12
Views: 5746

Re: Weather station. With gprs updates and 12V

<t>two questions:<br/> <br/> * do you have electricity to the site?<br/> <br/> * do you have reasonable mobile coverage to there too?<br/> <br/> The RPi uses relatively little current so you may as well leave it on 24/7. Or if power is really tight you would need to use a timer switch. But for UK ma...
by darkstar
Wed Jan 11, 2012 12:16 pm
Forum: Off topic discussion
Topic: ICT to be scrapped
Replies: 23
Views: 4431

Re: ICT to be scrapped

<t>Why should we waste time/money teaching one particular package set that is currently being used by business? It will be obsolete by the time they get jobs.<br/> <br/> Learning how a machine works is far more instructive than merely which button to press on some particular model.<br/> <br/> We wer...
by darkstar
Tue Jan 10, 2012 1:43 pm
Forum: General discussion
Topic: Launch party?
Replies: 65
Views: 10398

Re: Launch party?

Since it is aimed at schools (ha ha), we should use government logic and locate the party at the other university town: namely Oxford

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