Discussions for all Omap devices! iPad, N900, Beagle, Panda! ALL!

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    BiOMETAL Distro

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    boris_g
    Programmer at Arms
    Programmer at Arms

    Posts : 10
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    Join date : 2011-02-10
    Age : 34
    20110212

    BiOMETAL Distro

    Post by boris_g

    So I'm doing some nifty stuff - BiOMETAL.

    BiOMETAL is a bare bones Linux distro, which runs to the end user a web browser, with an embedded SIP client. Its for an as yet undisclosed project.

    I want it to be as simple as possible for the end user. Which means a touchscreen, and web design for that touchscreen. It'll also have a telephone headset wired into the audio in and out, allowing use of the SIP client.

    In essence, I don't want the user to think "oh, I'm using a tarted up but dumbed down computer," I want them to think its part of their everyday job, and its as intuitive as you can get.

    The other requirement is it has to be as bulletproof as you can get - no crashing or anything. Since the active programs will be web browser/ SIP client/ SSH/ Busybox, I think that would be easy to achieve on a VSS.

    Thoughts?


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    Post on Sat Feb 12, 2011 8:14 pm by admin

    I have had nothing but trouble on my beagle C4's NAND today.
    Find a failsafe!!

    Use the VSS but make sure you have a failsafe thought up. This project is going to be worth.. Potentially millions, yes?

    Also, for all (if anyone ever comes here Wink ) of you who do not know what an Embest VSS is, here it is:
    I always had horrible thoughts about this device, but after playing with it today, it's... Nice! Better than nice. Seems rock solid!

    Post on Sat Feb 12, 2011 8:21 pm by boris_g

    Yes - theres an emergency "man down" button (big red button?!) that'll pass through to the VSS, as well as a separate, independent bus. As for software - I could have a "failsafe" image located on the server? If the VSS loses, or other corrupts the OS image, it knows enough to download the image again?

    Post on Sat Feb 12, 2011 8:30 pm by admin

    If your NAND goes, then no. It can't.
    You could run off SD, the VSS uses a flush mounted micro SD (as you know scratch )

    What could be done though, maybe set an alarm/software that lets you know when there is even a minor issue and you can do some remote access via SSH.

    Or run off SD. But if the user has an issue and it fails... Evil or Very Mad Then BOOM!
    Whats going to happen if the user is 1000KM's from anywhere?

    Building BiOMETAL should be the easy part.

    Maybe use an Arduino in there somewhere to monitor everything? Maybe if a signal changes?
    Beagleboard is VERY susceptible to ANY minor change in power.

    The VSS has this issue fixed?

    Post on Sat Feb 12, 2011 8:40 pm by boris_g

    Well, an Arduino could be, quite simply, be made to do a "watchdog." In essence, the VSS "pats" the dog (signals) so the dog doesn't "bite" (reset). Such behavior would be simple in the Arduino IDE, you could even use a simple 168 board with a minimal I/O requirement.

    There is a slight problem with that - the VSS, as far as I know, doesn't have a reset line to assert easily accessible. Unlike the button on a BB which could be soldered to, the reset line on the VSS isn't there in "plain view." This could be a problem, however, if one was to have the failsafes in the softwae itself, the I/O line that pats the dog could be driven to assert a reset.

    Post on Sat Feb 12, 2011 8:59 pm by admin

    Make the Arduino the Reset button!

    When the system fails, have the arduino pull the plug and replug..
    Pulse command?


    As for your watch dog - That's how the N900 works!

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