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Mon, 31 Mar 2008
So courtesy of a failed firmware flash we need to access some debugging pins on a bit of hardware here. Initial prognosis was that it's a dual in line 60 way connector - two rows of 30 pins, 2mm pin spacing. Unusual, but not that odd - laptop ATA drives are 2mm spacing for example.
However, have now just realised that while the row spacing is 2mm, the "column" pitch is 0.1" (2.54mm) which makes it a very odd animal indeed. Thankfully we only need two signals plus ground off this puppy so can stick some wires in to get at them, but, sheesh, why mix standards!
Ok, I'm better now, thanks for listening.
Mon, 28 Jan 2008Arrived in Melbourne Sunday afternoon for linux.conf.au in time to see Rusty and Kelly do their Newcomers to lca session. Really worthwhile - I dunno why we didn't think to do it earlier. The group of 50 or so then retired to a nearby bar where Rusty kindly bought a round of beers (no, really!) to kick things off
Bumped into some familar faces which was nice but also met some new ones including Johann who had come from Iceland to attend the conference. Ended up having dinner with him, Chris, Matt and a few other folk - most agreeable.
Monday wandered up to the rego area to get a few things organised - we'd sent a couple of POWER6 boxes down for the guys to use for video transcoding. Unfortunately after much poking around we had to conclude one of them had been trashed in transit as it wouldn't go past the first level of initialisation before the management console said no dice. Service call placed...
Sat in on a bit of the Wireless Mini-conf sessions, few interesting things there, then spent the rest of the day remonstrating with the broken server and chatting with people - the latter was lovely :)
Took off from the conference late afternoon to meet up with Debbie, friend of the family that stayed with us for a while and is now living down here. Pretty much Rachael's de-facto older sister. Was great to catch up with Deb and hear how well things are going.
Dinner was noteworthy - Deb's a vegetarian so we went to the Vegetarian Nirvana Cafe in Richmond (Stop 21 on Tramline 75 IIRC) We ordered Samosas for entree, Shari Paneer, Navaratan Kofta, Garlic Rofi Chanai and Basmati Rice for mains then finished up with Gulab Jamun and Halava for dessert. It was one of the most delicious meals I have ever had. Indian cuisine, friendly service and I-am-speechless, wonderful wonderful flavours! Go there before you leave Melbourne.
Been nice to be back in Melbourne, I'd forgotten just how nice it is down here, much more my cup of tea than Sydney if I were to choose big cities.
Tue, 15 Jan 2008
Detaching Kernel Drivers w/libusb
Done some tinkering with libusb this last week or so in order to get the USBmicro boards that Jeremy and I bought going.
More on the reason for the tinkering later but in the process I discovered the kernels HID driver happily seizes the device on plugin - not unreasonable as the device identifies itself as a HID device.
After unsuccessfully going down the route of trying to tell the kernel HID driver to ignore it, I found that libusb has a couple of functions that are intended to deal with this very situation.
It may be poor reading of the docs or search skills on my part, but I wasn't able to find a definitive reference on how to actually use them, so here's the sequence that worked for me, edited for brevity:
struct usb_bus *bus_list;
struct usb_device *dev = NULL;
struct usb_dev_handle *handle;
/* Look for the first u4xx device we can find then try and open */
if((dev = find_u4xx(bus_list)) == NULL) {
return NULL;
}
/* Try and get a handle to the device */
if((handle = usb_open(dev)) == NULL) {
return NULL;
}
/* The kernel's HID driver will seize the USBMicro device as it
says it's a HID device - we need to tell the kernel to
let go of it */
if (usb_detach_kernel_driver_np(handle, 0) < 0) {
/* If this fails, usually just means that no kernel driver
had attached itself to the device so just ignore/warn */
}
/* Set the configuration */
if(usb_set_configuration(handle, 1) != 0) {
usb_close(handle);
return NULL;
}
/* Clain interface - gather would need to this for each
interface if the device has more than one */
if (usb_claim_interface(handle, 0) != 0) {
usb_close(handle);
return NULL;
}
/* etc. etc. */
I'll post the actual code shortly, want to clean it up a wee bit first. It'll end up here but I'll post to that effect when it's up.
Sat, 29 Sep 2007A press release for our machine just went up on power.org to coincide with the developer conference in Austin this week.
Photo courtesy of Dave Willoughby Photography :)
Brian, Nathan, Ian, Dave, Kaveh and a cast of many put in some hard graft to have the machine ready - the box they demoed was one of the production prototypes so is very close to what will be available. Other thing that is nice is it's using an open source driver for the XGI card, only the card init is done through x86 emulation code running in the bootloader.
Thanks to the folk that wrote after my earlier post, will be staying in touch as we get closer to availability.
Mon, 24 Sep 2007I'm always interested in cheap ways of getting small embedded devices onto an Ethernet network. For some time now the cheapest options seemed to have bottomed out at the USD$40 mark (chip + magnetics + PCB ready to go) or so. Still not quite at the point where you'd sprinkle a dozen around the place and not think twice about it.
An article in this month's Circuit Cellar magazine about the WIZnet devices caught my eye. The chips in question are about USD$4 or you can get various eval boards starting from USD$12 for chip + magnetics + PCB. This is low volume pricing - one to ten pieces!
A quick dig through the data sheet of the part in question (iEthernet W5100) yielded the following;
- SPI and MCU Bus interface options
- Integrated 10/100 Ethernet MAC and PHY
- Inbuilt TCP/IP stack
- Onboard RAM for TX/RX buffers or "Socket" buffers
From an API standpoint you basically get a set of memory addressable registers where you set things like MAC address, IP address, Netmask and Gateway etc. Another part of the register space lets you configure the "Socket" mode where you can set the chip up to run as a TCP Client or Server. When a connection comes in you get an interrupt and take things from there.
On an initial read through they really do seem to have done the heavy lifting so you can read/write bytes from a socket (or UDP) connection as trivially as you would a simple UART.
Have added one of their boards to my "Buy and poke at" list, will write up what I discover once I get started on it. Must admit to a couple of other things needing sorting first tho, so feel free to beat me to it... :)
Sun, 05 Aug 2007
One of our prototypes is missing
Finally catching up on things so a few words about OLS this year. A highlight for me was a BoF we ran for Linux on POWER - we had Freescale, PASemi, Terrasoft Solutions and Sony there in force along with our own little display.
Our own little display ended up being a bit of a story in it's own right. For some time now I've been working with some colleagues to get a viable, low cost PowerPC developer workstation out, kinda filling the gap left by Apple's move to Intel.
Thursday night was to be our big debut but, alas, we were thwarted and our machine spent the evening of the BoF in the no doubt salubrious surrounds of a bonded warehouse at Toronto airport. Improvisation was the key so an appropriately labelled cardboard box was pressed into service...
Happily the next day it made it to Ottawa and the OLS guys kindly let us show it off anyway.
Thanks to Brian Cwikla for these photos, RGB has a few up from the BoF here as well.
So the long and short of the box is that it's a four way PPC970MP design (that's two chips, two cores per chip) clocked at 2.5GHz with a coupla gigs of 667MHz DDR2 RAM, Hard disk, XGI XP-10 Graphics (Open source drivers - suweeet!) which we plan on having out toward the end of the year. We expect it to be quiet enough to be able to sit under your desk without driving you nuts. I want one myself and I hate noisy machines so I'm kinda pushing this angle :)
We're still finalising how we will get them out into the market since it's a limited production run, but we're aiming to have them on people's doorsteps at a hacker friendly price. FWIW you can send me an email and I'll make sure you get updates.
The BoF was lots of fun and to my thinking the rest of OLS was as good as ever, great technical content and always nice to catchup with friends in the community too.
Mon, 21 May 2007We've been contemplating getting another cat, a companion for our
Tortoiseshell,
I happened to mention this most serious of decisions over lunch today and the ever practical mpe gave us the obvious solution - "Drake".
And that was that :)
Duck, if you're curious, was named by Rachael after a childrens book she was reading at the time, "Duckcat". The storyline revolves around a Duck that thinks it's a Cat...
Tue, 12 Sep 2006To his considerable credit, I think Chris is the first person I know personally that's actually got Asterisk up and going. I wonder if he gives lessons... :)
Mon, 21 Aug 2006
Beamer the heir to the Magicpoint throne ?
I'd pretty much always used Magicpoint for any presentations I've needed to do. Always liked the simplicity of the file format and the ability to separate, at least to a large extent, content from presentation. What wasn't so pleasant was occassionally having to fiddle with X11 fonts and the fairly crude output if you generated postscript or PDF.
I've been doing more and more stuff in LaTeX of late and so cast around for a way to use it for presentations as well, having seen a couple of my lecturers at Uni doing so. While the style sheets they used worked pretty well they were a bit hard to customise - I'm by no means a LaTeX guru. Enter Beamer
Beamer provides an amazing degree of flexibility, indeed with care you seem to be able to use the same source file to spit out your thesis, the slide show for your work as well as your speaker notes. For screen based presentations (usually rendered as PDF files) it can do transitions and all sorts of funky stuff - not things I use personally but I guess if you're into eye candy it's covered. Even though it's very flexible it's dead easy to get going - the hello world equivalent runs to 20 lines and is mostly content rather than setup.
The documentation is excellent and includes a bunch of examples to help you get going. Well worthy of your time to take a look :)
Thu, 03 Aug 2006Did some nice rides while in Austin and in Ottawa, will put up a little bit of information about them when time permits including some GPS logs. Had a good time at OLS too which I planned to write about, but at this rate that might be Christmas so will let the photos tell the stories for now.
Starting here shots enroute to and riding around in Austin. Then Ottawa including riding up a big hill with setuid and then the post OLS hacker bike ride
Some other shots from OLS including of course the post conference party at the Black Thorn.
Nice to be home, but don't need a photo to show that :)
Thu, 13 Jul 2006On Monday night at Don's suggestion headed down to Artz Rib House with Monte for some good music and food. Ended up doing very well for both. Artz is a nice place, quite small but has a very welcoming feel - we ended up one table from the performers which was cool.
Turned out my fellow countrymen (countrywomen ?) Women In Docs were playing as guests of Sarah Elizabeth Campbell which was rather a treat. Soon as Women In Docs started their first song I realised that I'd them play at the National Folk Festival in Canberra earlier in the year and been quite taken by their stuff then.
Couple of songs in Roz asked if the audience was having difficulty with their accents, couldn't help but reply "Not at all". This led to a bit of fun back and forth (it's that kind of venue) - turns out they're from Brisbane where my brother in law lives, Chanel's parents live a couple of suburbs away in Canberra. Small world.
After the show we chatted for quite a bit - Silas (Violin) was originally from Sydney, worked in IT when not touring and had recently migrated a couple of servers over to Linux from Windows :) Really nice people, they were in Austin as part of a couple of weeks touring around the US and Canada. Sounds like it's going well for them though they deserve to be more widely heard. Picked up a copy of their first album "Under a Different Sky" which I commend to you.
All in all a really good evening and nice to have a chance to practice my Australian again :)
Sun, 02 Jul 2006
Riding in and around Böblingen
Did about 65km today, a loop out to the south of Böblingen taking in Holzgerlingen, Bebenhausen, Tübingen, Lustnau, Dettenhausen, Weil, Neuweiler and Schönaich before returning to my hotel. Nice detour on the way through Schönbuch nature park too. I've already raved about the riding here so shaln't again, some pictures if you're curious though.
Sat, 01 Jul 2006
Germany v Argentina / The Kindness of Strangers
Yesterday afternoon I headed to the local Biergarten as there was a footy match on that the locals seemed pretty keen on.
Found a (relatively) quiet place to stand to enjoy a Wiezenbier and watch the game unfold. The atmosphere was amazing, very boisterous but not at all threatening.
Argentina of course scored first whereupon things went very quiet indeed. Germanys reply in the 80th minute sent the place into an uproar bettered only by the elation when they prevailed in the penalty shootout. Along the way got chatting with a couple of people nearby who kindly explained a couple of the nuances of the game when it came down to penalties and extra time.
After the match I went outside with everyone else and watched people disperse, much tooting of car horns and waving of flags. Got chatting with Ralf who I'd spoken to inside and he in turn introduced me to Rebecca and her partner Jürgen. They very kindly invited me to come with them to a street party in the next town, Schönaich.
The party was just great - couple of the streets in the village were closed to traffic, stalls set up selling food and beer and a stage for entertainment. Had a pretty decent covers band playing most of the evening, covered everything from Santana to Jethro Tull. We were joined by another friend of theirs, Torsten and a thoroughly enjoyable evening ensued solving the worlds problems over a beer or two and savouring the day's victory.
I think the thing I was most taken by was the simple kindness and welcome I received as a complete stranger to the area and just how civilised the whole evening was. This care extended through to Jürgen & Rebecca arranging a taxi to get me back to Böblingen rather than me having to rely on phrasebook German to do so.
Thanks guys, hope we get to do it again one day :)
Thu, 29 Jun 2006I'm working at the IBM facility in Böblingen, Germany this week on the way to OLS via Austin. I brought my bike with me on the trip for the first time and it's been a delight to get out and ride around a bit at the end of the day.
Having done a bit of a recce yesterday I rode in to work this morning. As someone accustomed to having to circle around a carpark to find a place to park it struck me as delightfully odd to have to do the same thing to find a spare spot to lock up my bike. Not through lack of cycle parking facilities just that so many people ride to work. The cycling facilities here are excellent and it's also the first place I've visited where it felt superfluous to lock up your bike...
Sun, 28 May 2006Was in Tokyo for work last week and was able to catch up with some friends based there ahead of things kicking off on Monday.
On the Saturday spent a thoroughly enjoyable few hours with Stuart, a friend of ours that is doing Japanese language studies there for six months or so. We took a trip to Akihabara and had a good geek out looking around. I was particularly impressed by Stu's faculties with Japanese - effortlessly ordering us up some nice Udon for lunch while texting a friend in Kanji on his mobile phone.
Akihabara has changed a little since I was last there (c.2002), couple of new buildings and a few less of the tiny hole in the wall places that I personally prefer. These latter are just amazing for anyone of a hardware hacking sort of background. By turns a great array of surplus/second hand odds and ends, just right for that next project, mixed with shops selling a tremendous array of small hand tools, test equipment and new components.
In the evening Ben, Arnd and I met up with Raster and Horms for a little sightseeing and food. We had a good wander around before having things cut short by a rain storm. Fortunately our guides were able to find us shelter in a nearby yakitori place which (obviously) sold beer and nibblies which allowed us to while away a couple of hours most comfortably.
Eventually the rain gave up and we went down to the Ginza district which was a bit of a eye opener - almost brighter by night than by day courtesy of the many signs and large LED screens around the place. Certainly gives Times Square in New York a good run for its money.
Went to a great place for dinner, it's good to the point where I want to write up how to get there etc. so that will have to follow presently. A really nice evening and great to be able to catch up with Horms and Raster IRL for a change.
Sunday hooked up with one of our hosts in the morning and he led us on a tour through Akihabara (as you'd have gathered, I don't mind repeat visits to the area at all) he kindly helped me bridge the language barrier and buy a couple of specific things. That afternoon I caught up with a mate of mine from IBM who's there on assignment - we only chat a few times a year but it's always a pleasure when we do.
Remainder of the week was throughly enjoyable both professionally and socially, our hosts were very gracious in taking care of us and the various technical discussions productive as well.
Did a final run out to Akihabara in the afternoon before we flew out and picked up an assortment of PIC microcontrollers and some neat little QFP probes made by Sunhayato. These latter are a particularly neat little tool as you can clip onto lead pitches down to 0.5mm which means you can get at most SMT parts in a hands free manner. The former are bound to come in handy at some point :)
A good trip, my only regret is that I don't get to Japan more often as its one of the more consistently enjoyable places I travel to.
Sun, 07 May 2006...came up when several weeks of phone/SMS/email tag drew to a pleasing conclusion this weekend.
[art]baghdad is the name of a Sydney based photographers collective set up by Dave and Colin (mentioned previously) and a few like minded friends.
Some fantastic images in there, and for those of you in Sydney, they run exhibitions now and then. Worth a look and, yes, work safe :)
Sat, 01 Apr 2006Not sure whether to laugh or cry having seen this mentioned in Chris' blog. Despite the timing seems to be the real thing.
Think I need some tea and perhaps a little lie down.
Tue, 21 Mar 2006In a recent post I intimated that Mikey had arranged for Jo to carry all his stuff in her back pack. Information received this morning suggests that this was in fact incorrect, it was Jo's stuff in her back pack, not Mikey's.
I apologise for any confusion, consternation or upset this grave error on my part may have caused.
/me hopes he won't be kneecapped now.
Mon, 20 Mar 2006Headed out this morning to ride in Pedal Power's Big Canberra Bike Ride. Quiet enjoyed it last year so was keen to support the event and head along today.
Needed to be on the road earlyish to make the Lake Burley Griffin start by 8am - forgot to pre-register. Only notable on the ride in was being flagged to a stop while barrelling down Dryandra Street. Gentleman enquired if I had a pump, which I did, so gave a hand by pumping up his companion's tyres - seemingly bike hadn't been used for many months. Suggested some oil for the chain mightn't be a bad idea either - meant to be black not rust brown after all...
Met up with the 'bent contingent at the start as well as Jo and Mikey. Curiously Jo seemed to be carrying all Mikey's stuff in her back pack, not quite sure what the deal was there. Trike wise I spotted five Greenspeeds (John, David, John, Peter {I think} and mine), as well as Peters suspension trike (forgot to ask what make). Alex and Bev were on their recumbent bikes as was Mike and his daughter on the 'bent tandem.
Ride itself was uneventful - pretty easy 25km, the climb out of Yarallumla up to Forrest being the hardest bit. Once you made the top though you were rewarded with a nice downhill run on Melbourne Ave into the back of Parliament House - clocked bit over 54km/h down there :)
Back at the start had a bit of a natter with folk then headed home, nice 55km all up for the day.
Mon, 13 Mar 2006First, gentle reader, a confession. I have bought a bicycle. Yes, as a confirmed recumbent enthusiast I have recently been living a dual life sometimes puttering around on one of those two wheeled things that fall over when you stop. I've not yet had the heart to tell my Mob buddies, will have to fess up on Wednesday morning I guess.
There were a couple of motivators for this - when riding with Rachael and Lu a bike is a bit more convenient, I can go where they go without having to worry about jumping gutters etc. I fancied a bit of a change too - the GT3 is lots of fun and very comfortable but having a MTB adds a new dimension to riding around. Last and by no means least is that my commute will eventually involve a fire trail.
Got the bike from Trevor and the guys at Lonsdale St Cyclery who I can heartily recommend - very nice people and very knowledgeable.
So on Sunday chucked the MTB in the back of the car before we headed out to Carwoola. The intent was to try to find a path through the bushland between Captains Flat road and Queanbeyan, hence avoiding having to ride down the very perilous King Highway. A friend of ours, Simon, was keen to come along which was cool - was nice to have someone to bounce navigational decisions off as we rode around unfamiliar territory.
It ended up being quite a descent and I was very glad for having at least read a few articles on riding downhill on an MTB even if I hadn't actually done it before. Spent most of the time hanging off the back of the seat proceeding very carefully.
Thankfully we avoided any spills, riding all but one section of about 30m as it was just too steep and rough, at least for my/our riding skills. I suspect if I start doing this at all regularly I may have to consult an expert...
The hill thus conquered we rode into Queanbeyan and parted company there, 8km total over about 40 minutes. Shortly afterwards I had to stop in a side street for about 20 minutes to remove the bindis from my front tyre and fixing the associated puncture. Lady from the house opposite even kindly came out with a tub of water in case I needed to bubble for the holes. New tube did the trick instead but was nice to have the offer. Remainder of ride home was uneventful if warmish, only other stop was to get a couple more tubes and fill up water bottles.
Tue, 07 Mar 2006Was out of town with work for the last two weeks of February so organised with Michael from Fuse to do a service on the trike. Wasn't anything wrong other than a frayed gear cable but 12 months was the recommended service interval (!) so was a bit overdue, probably doubly so with just shy of 4,000km on the odo :) I should add that I have actually being doing regular maintenance during that time!
Michael kindly dropped it in to work for me on Friday so got to take it for a burn on the way home. Niiiiice. Everything was just snickety-snick, running quieter than I'd thought possible and put in a good time to boot. As they say, a well oiled machine...
Fri, 27 Jan 2006Next Wednesday I move back into a technical role with OzLabs and Martin takes over managing the team. I'm delighted, not, I hasten to add, because I dislike management, but simply because I've missed doing technical stuff.
For the last six years I've had the privilege of managing the OzLabs team. First the group that made up the Australian arm of Linuxcare then for the last five years our broader team at IBM that includes some very capable folk in the US. It's been great, indeed it has proven to be without a doubt the most rewarding period of my career.
So why change then ? Well, as I note above I simply miss doing technical things. Our group does some seriously cool things, much of which ironically we often can't talk about. I figured rather than continue to live somewhat vicariously through what the guys were doing it'd be interesting to get back "on the tools" myself.
Martin had expressed some interest in people management and would clearly fill such a role very capably, so it kinda went from there. I should make it clear that I spent a lot of time saying things like "It's too late for me, save yourself!" but he remained both undaunted and quite keen.
Management in the Linux Technology Centre and IBM Australia have been enormously supportive so it's really made the whole thing a no-brainer. I still get to work with the same fantastic group of people and only have to move my stuff about four desks to the south :)
The new role is sounding quite fun, will be a mixture of planning/strategic sort of work as well as a decent amount of coding. Also get to keep working on my masters course which ought to finish up at the end of this year. Even the scope to keep studying beyond that, but figure I'll see how December 2006 looks.
So, next Wednesday starts another chapter, one that promises to be at least as rewarding as the one draws to a close.
Wonder how long it will take for the pointy bits in my hair to disappear ?
Sun, 11 Dec 2005
Riding in Rochester,MN, Again :)
A work trip was once again going to see me in Rochester, Minnesota so I emailed ahead to Dave that I'd ridden with back in July to see if riding was an option this late in the year. He was keen so I made a point of packing my riding gear including several layers of thermals in anticipation of a chilly day.
A few days out I checked to see if the ride still looked like a goer, I'd been keeping an eye on the weather courtesy of weather.com and figured it could go either way - it had been in the twenties (fahrenheit) for much of the week I was in Austin so was by no means sure that we'd be on.
On the Saturday night I gave Dave a call and we agreed to meet at his place around half one in the afternoon. Turned out to be a glorious day - sunny for the most part but below freezing the whole time which for me was a real novelty. Dave once again kindly loaned me a bike and with a quick check of settings we were off.
Riding in the snow is really something else - the roads had been swept so they were only slippery on the edges, rest of the time it was pretty much like riding in wet weather. We did a 30mi loop through similar territory to the earlier ride and the whole experience was quite special - snow makes everything quiet and no better way to enjoy it I think than from a bike/trike. To someone like me unfamiliar with snow it was a delightful experience, if a bit chilly.
We took about two hours to cover the loop before returning to the suburbs, I had a few wobbly moments but was relieved to have no spills or even a need to put a foot down. My cold weather gear from Ground Effect did very well, though I'd have wanted another (3rd/4th) layer if we'd been out for longer, or in colder conditions.
Dave made the rather wry observation that the average temperature for my rides in Rochester was now a pleasant ~60F on the basis of the two rides so far (100F for the first, 20F for the second)...
Rest of my time in Rochester while brief was equally enjoyable, catching up with colleagues and getting some good work related stuff done too, but the ride was certainly the most unique bit!
Wed, 26 Oct 2005
Yes, I think Freddie would be proud
I realised last night how much I'd lost track with this years F1 Championship. Not only did Ferrari come 3rd in the Manufacturers Championship but Michael also came in 3rd in the Drivers Championship. Last time I'd looked it was shaping up for the usual Schumacher/Ferrari walk in the park. Apparently not. Pleasingly Mark Webber finished the season in the top ten too.
Rather unusually, this all came about courtesy of an entry tucked away on Music Thing - Formula One engine plays 'We are the champions' Being something of a Queen fan too checking it out was a must. Quite well done and clear proof that F1 hackers have at least as much a sense of humour as their computing breathren. May want to turn your sound card down before you let it rip tho...
Thu, 13 Oct 2005bje pointed out this piece by David Williamson. Long, but thought provoking. Definitely worth a read.
Tue, 04 Oct 2005About a year ago we bought a 16 acre block of land in Carwoola, about 10 minutes from Queanbeyan. Lu and I have long liked the idea of living out of town a bit and having space set up so that we can invite friends, family, colleagues etc. out to stay in a guest house. Idea is to set it up sorta like a retreat so folk can come and stay and have time out, watch the world go by and relax and, in the case of many of the people I know, have decent bandwidth as well so that patch can still be submitted :)
Friends of ours live about 400m away and we've got pretty clear line of site to their place. As of about six months ago they also got ADSL - the RIM at the end of the road was upgraded. I gave Chris a hand with getting it set up and we installed a Linksys ADSL Modem/Router to feed the local network.
A bit of browsing of their website and a few emails back and forth with the guys at Freenet Antennas confirmed my thoughts that a link between the two sites would be a no-brainer.
At Chris' end there's a Minitar access point in one of Freenets' Rootenna enclosures that has space for the AP at the back and a 14dBi directional antenna at the front. The advantage here being that you have a very short run for RF (20cm) as the AP is right up next to the antenna. Instead you send ethernet and power up to the far end which you can do over a few tens of metres without ado, unlike 2.4GHz RF. Took some photos of all this starting here.
Network wise, the AP at Chris' end plugs into a small DMZ so it can see the ADSL connection, but not the home network.
The other end of the link uses a 14dBi yagi also from Freenet with a short length of coax to plug into the back of a second Minitar AP. The APs are configured in point to point mode. For now it's (obviously) a portable setup - AP runs off a 12V Gel cel and ethernet goes directly into back of my Thinkpad. Some shots of the setup used for the "First Post" entry are here.
On the basis of the tests on the weekend it works quite nicely, indeed we were able to bring the link up by pointing the yagi away from the AP and using a signal reflected off the side of the hill. On rough calculations the antenna gain available should be good for a couple of km - I took the view that I'd rather have the extra gain to obviate any potential problems with rain and/or trees in the path
Next steps are to get the remote end a bit better integrated (portable mast of some kind, cigarette lighter adapter for AP etc.) and then we'll be set for next time we go camping out there.
In the meantime, if you fancy doing your next commit from among the gum trees get in touch :)
Sun, 02 Oct 2005With much assistance from Chris, first post from Jaralah :)
More to follow...
Sat, 01 Oct 2005Coming towards the end of the first week of a few weeks leave. Been nice to have a break, miss the guys a bit but has been cool to have family time.
Had a nice evening tonight catching up with old friends, as always left thinking that really must do this more often. These guys I've known since my teens so there's a lot of capacity for "remember when..." which is kinda fun.
Tomorrow will be out to Chris & Fiona's place for lunch and a spot of 802.11 hacking, of which more to follow...
Sat, 24 Sep 2005Great evening last night - dinner with a subset of "The Taken" Fan Club Inc. before heading across the road to The Pot for the show. The Taken of course need no introduction and played a great set.
Pics are here - all 1600 ISO and slow shutter speed so did some experimenting with converting to B&W to combat noise and blur a bit.
Tue, 13 Sep 2005
Sporting clubs are the McDonalds for Adults
I hate to miss a trend and besides, I tend to agree... :)
Sat, 10 Sep 2005Courtesy of The Register. Doing a google search on "failure" provides an amusing 1st result at present...
And in a similar vein from the same story (and on JWZ's blog I think, but couldn't find the link.)
in 1817 in 1843 cat Houses Magazines Erika may hit
I'm sure this means something, or maybe it's just my brain is exploding.
Tue, 23 Aug 2005Was saddened to learn of Bob Moogs passing yesterday. Don't really know what else to say that hasn't already been said in the many tributes that have flowed since his passing. Like my old Model D he'll be missed.
Thu, 18 Aug 2005Both Lu and Mel pointed out that Mel already has a great site up with restaurant reviews, focus is on vegetarian cuisine.
Not sure but I think I owe Mel dinner to avoid a patent infringement claim or some such judging by her email... :)
Wed, 17 Aug 2005Ended up at the Daily Grind for lunch yesterday with a couple of colleagues from another part of IBM. Most agreeable company and the food was very good.
The Grind is one of these sorta unexpected pleasures - tucked out of the way between two office blocks and pretty unassuming from the outside. Food is uniformally very nice, keenly priced and often of a calibre you'd not baulk at if it had cost you another couple of bucks per main.
They provide table service as well as takeaway - I find the former the real strength, good coffee too if that's your thing. Service is efficient, the guys run a tight ship and it's a great spot for dining outside on a sunny day.
One of the specials this week is a parmesan crumbed chicken with cream potatoes which Andrew and I had, both concluded it was pretty good stuff. Kaaren favoured the seafood risotto which also seemed to meet with approval. I know from past visits they do one of the better chicken caesar salads in town too.
If you're in the area give it a go - highly recommended :)
The Daily Grind Cafe, 10 National Circuit, Barton, ACT - +61 2 6273 9077 - Weekdays, breakfast, lunch, do coffee into afternoon, will take reservations, usual credit cards/EFTPOS.
Update: thanks to Steven for pointing out they do breakfast too :)
Tue, 16 Aug 2005Came to the realisation that I was avoiding blogging anything simply because I was daunted by the prospect of having to cover all the intervening news. Rather foolish in hindsight, not as if there was an undertaking to provide a daily missive. Not as if there's been that much exciting either come to that :)
Nice to be home though, rest of trip was fun, back into study at Uni which is hard work.
Anyway... I'd been meaning to start a part of my blog devoted to good places to eat and so do so for your amusement and/or (hopefully) gastronomic pleasure.
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Sun, 17 Jul 2005Last weekend I was in Rochester, Minnesota and managed to go on two rides which was rather fun.
I'd done a bit of googling and found the Recyclers, a mob associated with the Rochester Active Sports Club which looked promising. I visited a couple of bike stores and was able to get a bike through Rochester Cycling & Fitness - nothing flash just a hybrid/comfort bike. A few emails back and forth with the organisers of their Saturday morning ride and I was ready for the first outing.
Saturday morning I met up with Jenniene and Rosemary who run the Hybrid Biking Group rides. We did a leisurely 15km ride around the bike trail network then had a coffee to finish up. Thus motivated I explored the trails for another 10km or so before returning to the hotel.
I fancied doing a longer ride so did some more digging around the RASC website and found that there was a ride planned for the Sunday morning with options of 53, 68 and 87 mile routes. This alone gave me pause as I'd not done rides much over 70km (~40mi) before and these were all on the trike. I sent an email off to Dave who organises the rides and explained my background and riding experience to see if he thought I'd be up to it.
Armed with the map of the route I decided to drive it and see what it was like. Looked promising, pretty flat and very little traffic. By the time I returned to the hotel there was a reply from Dave's which was most encouraging - he thought it would be fine and even offered to loan me a better bike. The latter being just one example of how welcoming the whole group were!
On Sunday morning I rode my rented bike over to Daves to arrive at 7:30 and he got me set up with his "loaner" bike. Really nice bit of kit, carbon fibre frame, Shimano/Campagnolo components and even had a speed sensor installed that would work with my Polar HRM. Did a few laps around his street and confirmed all was well before we headed off to meet up with the rest of the bunch. Between Dave and I got some photos of proceedings.
There were seven of us riding in total, very nice bunch of people and most helpful. This was both the first time I'd ridden a roadbike in earnest as well as in a bunch proper - much closer quarters than I'm used to from riding with the mob. The guys were very accomodating and patient, plenty of useful advice and a well planned route made for a highly enjoyable ride.
We ended up doing the middle length route, some 100km or so. A number of snack/drink stops were most welcome, I think I went though something like 4.5l of water and about 1.5l of Gatorade. 30C+ temperatures will do that. Thankfully I'd bought some snack bars (nuts, sultanas etc.) which along with a banana purchased enroute helped keep the energy up. The roads were great, very little traffic, well maintained and fairly flat. Just enough hills to keep it interesting at the start of the day and provide for a few "are we there yet" moments in my mind toward the end.
About six hours later I was back at the hotel, bit sore and dehydrated but elated, a great ride with a great bunch of people. Thanks guys. Figured a total of 130km for the day. Next time I'm gonna take the trike though, hence avoiding a sore butt as well as (perhaps) the ridicule of my recumbent mob mates for riding a wedgie :)
Fri, 15 Jul 2005Work side of things over last few weeks (the reason I'm travelling) has been going very well. Nature of most of it is such it's not really appropriate to discuss in any detail, but will note that it's been great to be able to catch up with colleagues and visit the various labs where the guys work.
One geeky highlight was visiting the East Fishkill facility which is where IBM has its 300mm fab plant. One of the guys we work with, Frank, kindly showed me around the fab and some of their test facilities. Very very cool stuff, can't go into detail, but cool.
Next week I head up to Ottawa for OLS which has a great program this year. Will be great to catch up with people too :)
So that's what I'm really doing here, despite the prevalance of blog entries about bicycles and so forth...
Tue, 05 Jul 2005While I was in Germany I rented a bike from a place near the hotel and went for a bit of a spin. I'd planned to do some riding while away so had brought most of my riding gear with me so basically just needed a bike. A small saddle bag and waterbottle bought from the shop did rounded things out.
I ended up doing a bit over 40km in 2 hours and was just a great way to see the countryside. On the advice of the folk at the bike shop I rode up to a watertower above the town as a starting point, then found the Boblingen/Sindelfingen bike route which as I hoped turned out to be a nice loop from Sindelfingen to Boblingen and back.
This was the first time I'd ridden in a new area let alone a new country while on business and it was just a blast. Was a delightful way to really see the scenery with far less pressure than when driving which, largely due to the whole left hand drive/right hand drive thing requires quite a bit more concentration than usual. Higher speeds obviously contribute too as it doesn't really do to be looking at the scenery at automotive speeds. Being on a bike on a dedicated cycle path allows a lot more comfort in just looking about.
The following weekend I went to the UK to see family and friends and attend a family wedding (which was very nice, but I digress). On the Sunday evening stayed with a mate of mine, Roger. Roger and I ended up doing about a 15km ride around some traditional English country roads which was most pleasant. Even stopped at his local for a pint (or in my case a half :)
Bit odd to be back on two wheels but not too bad. Missed the beach chair style accomodations of the trike though...