Try the latest cvs again... I have fixed a missing usb_release_interface() and some other statistics from those errors.
/Christian On Mon, 2005-06-27 at 11:34 +0200, Jan Kandziora wrote: > Am Montag, 27. Juni 2005 05:26 schrieb Gregg C Levine: > > Hello from Gregg C Levine > > Paul, explain this phrase in better detail please: > > "In any case, it's great that Jan has a setup where he can > > consistently trigger the errors." In an embedded an environment it is > > sometimes considered desirable to stress test the file system by > > triggering power cycles. There's an article on that, and the methods > > used somewhere on the Linux-MTD site. > > > What I do isn't stress-testing. That would mean to get parameters when some > component will probably fail and has to be replaced. That's not what I'm > after, at least at the moment. > > I just ran into that failure - it makes 1-wire completely unusable for my > application. > > > > Now I can see for myself how a rigged system would be desirable for > > stress testing the file system that we've created. But a detailed > > explanation would be good thing. > > > > Jan, what are you running? Which distribution? What is the hardware > > configuration? I walked into this meeting late, and left my agenda and > > most of my notes in a different location. > > > I'm designing a semiautomatic vending machine with a lot of attached devices > (flow-rate sensors and solenoid driven valves), most of them in a ten-meter > range around the machine, but some of them about 100m far away. The computer > which will be built into this will be a MIPS based embedded board, which > isn't completed yet. > > The computer I use to test is a Gene6310 "embedded" (more like barebone) PC > board. Its i386-family based. This computer is working and would be used as a > backup solution, if the MIPS board is not completed in time. > > I have a testbench, where I can arrange the devices like they were already > put into that vending machine. I hooked up the 1-wire to USB via a > off-the-shelf DS9490 adapter to the barebone. There is a mains transformer > 230/24V~ 150W (completely passive, not a switching one), which is the power > supply for the sensors and solenoids. The actual transformer for the machine > will be a 400W type, which makes things even worse. > > This mains transformer generates some kind of EMC when switching it "ON" or > "OFF" with an ordinary 230V switch. This is understandable if the switching > happens outside of the zero-cross of voltage (ON-switching) or current (OFF- > switching). The EMC pulse causes either the USB or the 1-wire (or both) to > disconnect - which leads owfs into an unusable state. > > I'm pretty sure I can minimize this EMC by putting a zero-cross and snubbing > circuit into my transformer - but I'm very unsure other appliances in the pub > or gas station where the vending machines will be mounted are so kind. > > That's why I think we have to be able to recover from this error > automatically. > > Kind regards > > Jan > -- Christian Magnusson <[EMAIL PROTECTED]> ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
