highaltitude.log.20090424

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[10:13] <edmoore> hi sbasuita
[10:13] <edmoore> how's tricks and revision?
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[11:29] <edmoore> morning jcoxon
[11:36] <jcoxon> hey edmoore
[11:37] <jcoxon> hows it going?
[11:37] <edmoore> no clinic today?
[11:37] <edmoore> not bad, working on some zams for next week
[11:37] <jcoxon> not today
[11:37] <jcoxon> i'm meant to be revising for my arabic
[11:37] <edmoore> eeek
[11:37] <jcoxon> but my lack of knowledge i'm watching E4
[11:37] <jcoxon> oops
[11:37] <jcoxon> missed a bit
[11:38] <jcoxon> lack of knowledge is so depressing i'm watching E4
[11:38] <jcoxon> i'm so incredibly screwed
[11:38] <jcoxon> hehe
[11:40] <jcoxon> steve might launch this weekend
[11:41] <shellevil> Watch Al-Jezira.
[11:41] <shellevil> sp?
[11:42] Action: shellevil failed car theory test.
[11:42] <shellevil> Stupid interactive low-resolution flickery displays.
[11:42] <shellevil> And stupid software.
[11:43] <shellevil> And of course, the testing company has no incentive to make either better.
[11:44] <shellevil> jcoxon: tonight I'll have a deeper look at radio. Sorry - way too much stuff happening here.
[11:44] <jcoxon> shellevil, no worries - in no hurry
[11:44] <jcoxon> i haven't heard about any HF launches
[11:45] Action: shellevil wishes he hadn't broken his siggen.
[11:46] <shellevil> Old HP thing - trapped wiring loom with very thin wires, and quite a few ripped out.
[11:47] <shellevil> I got some parts to replace it with, but have mislaid them. (maxim sig-gen chips). You may be spotting a theme.
[11:47] <jcoxon> a little :-)
[11:48] <shellevil> Annoyingly, they were nice versatile sig-gen chips, but maxim have discontinued them. square/triangle/sine/...
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[16:04] <edmoore> yo all
[16:05] <edmoore> natrium42: Hobble is Go
[16:05] <edmoore> got a project supervisor confirmed
[16:05] <rjharrison> hehe
[16:05] <edmoore> http://www-control.eng.cam.ac.uk/Homepage/officialweb.php?id=1
[16:05] <rjharrison> cool
[16:06] <rjharrison> high-altitude balloon platforms
[16:06] <rjharrison> He's your man
[16:07] <edmoore> this guy is The Dude
[16:07] <edmoore> wrote the book of control engineering
[16:07] <edmoore> if anyone in the world can help me get this thing working
[16:08] <rjharrison> I didn't know there was a person in the world who's speciality is HA Platforms
[16:08] <rjharrison> But there you go and in cambridge to boot
[16:08] <edmoore> well when I chatted to him about it it was like in 1981 or something
[16:08] <edmoore> but he is a control theory god, so w/e
[16:10] <rjharrison> Wha is hobble going to be
[16:10] <rjharrison> what
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[16:10] <rjharrison> PHD
[16:10] <shellevil> edmoore: is he originally a pole?
[16:10] <edmoore> MEng
[16:10] <edmoore> shellevil: hungarian I think
[16:10] <edmoore> jcoxon: got supervisor for Hobble
[16:10] <shellevil> Sorry - bad pole/zero joke.
[16:10] <edmoore> rjharrison: a balloon-borne telescope
[16:10] <edmoore> shellevil: i will pretend I didn't hear that
[16:11] <shellevil> edmoore: what apature are you aiming at?
[16:12] <shellevil> I've pondered ultralight scopes in the past.
[16:12] <rjharrison> Sorry ed is it for a Phd project ot summer fun. I think you are doing a masters ATM
[16:12] <shellevil> (very light scopes, not scopes on ultralights)
[16:12] <edmoore> i'm doing a BA atm
[16:12] <edmoore> then next year is my MEng
[16:12] <edmoore> which this is for
[16:12] <rjharrison> Oh yep I remember the converstaion now BA's for al
[16:12] <edmoore> and i get an MA for free in 3 years for a reason no one has yet worked out
[16:12] <rjharrison> all
[16:14] <jcoxon> edmoore, amazing, 4th year proj?
[16:14] <edmoore> yep
[16:14] <jcoxon> edmoore, your MEng will outstip your MA
[16:14] <edmoore> with this chap http://www-control.eng.cam.ac.uk/Homepage/officialweb.php?id=1
[16:14] <edmoore> jcoxon: yes for sure
[16:14] <jcoxon> i look forward to my MA
[16:14] <jcoxon> :-)
[16:15] <edmoore> jcoxon: check out his brief bio - looks like he might have some tangentially related and perhaps useful experience for a project like this
[16:15] <jcoxon> sounds perfect
[16:17] <jcoxon> wonder which projects
[16:18] <jcoxon> hey guys, rob and i were just dicussing a small change in the ukhas standard
[16:18] <jcoxon> was wondering what everyone thought
[16:19] <jcoxon> basically, to check its a valid string we do a field count - which doesn't really allow for peoples custom data
[16:19] <jcoxon> so instead of ',' as teh delimiter for this data
[16:19] <jcoxon> we use ';' instead
[16:20] <jcoxon> e.g.
[16:20] <jcoxon> $$callsign,count,time,lat,lon,alt,heading,speed,custom1;custom2;custom3*checksum
[16:20] <jcoxon> $$callsign,count,time,lat,lon,alt,heading,speed,custom1;custom2;custom3,*checksum
[16:20] <jcoxon> forgor the final comma
[16:24] <shellevil> what about simply *checksum must be the last field?
[16:24] <edmoore> helicopter just landed in the playing field just outside
[16:24] <edmoore> beasting thing
[16:25] <edmoore> must be important, they let a black lexus drive across the cricket pitch to pick up whoever is in it
[16:25] <edmoore> and it's a military heli
[16:25] <jcoxon> its quite a big sanity check to check number of fields
[16:25] <shellevil> jcoxon: yeah
[16:25] <shellevil> if you get several strings, you can compare field numbers
[16:26] <jcoxon> edmoore, wow
[16:26] <shellevil> two successive strings with same number of fields and matching sum, ...
[16:27] <rjharrison> they are comming for you edmoore
[16:28] <jcoxon> run edmoore run!
[16:28] <edmoore> one lives in hope
[16:28] <edmoore> if it gets me out of tripos exams
[16:28] <jcoxon> know the feeling
[16:28] <jcoxon> just met up with a friend who speaks arabic - now got lots of sentences to say in my oral exam on monday :-)
[16:29] <edmoore> did he tell you what the sentances made in english?
[16:29] <jcoxon> yes
[16:29] <jcoxon> that said if i don't understand something i'm just going to push on with my questions
[16:29] <jcoxon> my own agenda
[16:29] <edmoore> when my friend took winchester scholarship
[16:30] <edmoore> tender age of 12
[16:30] <edmoore> he was asked in the history exam - 'what are the more important causes of conflict - short term or long term?'
[16:31] <edmoore> and he didn't know, but he did know about the history of the crimean war
[16:31] <edmoore> so he wrote 4 pages describing the history of the crimean war in complete details
[16:31] <jcoxon> hehe
[16:31] <edmoore> and then put 'so you see, long term reasons are more important' as a conclusion
[16:32] <edmoore> his teacher gave it back to him when he was 18 saying it was the most fantastic, but completely useless answer to any question he's ever marked
[16:32] <jcoxon> not sure thats going to happen for me :-[
[16:32] <edmoore> he got an E for scholarship history...
[16:33] <jcoxon> oh right
[16:55] <sbasuita> edmoore, tricks and revision?
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[16:57] <edmoore> ?
[16:59] <sbasuita> edmoore, FreeNode-#highaltitude.log-Apr 24 10:13:08 <edmoore> hi sbasuita
[16:59] <sbasuita> FreeNode-#highaltitude.log:Apr 24 10:13:13 <edmoore> how's tricks and revision?
[17:00] <edmoore> what kind of funky verbal diarhhea client do you use?
[17:00] <edmoore> i was asking how you were (how's tricks) and how revision is (because you're doing GCSEs)
[17:00] <sbasuita> edmoore, heh, just grep'd the logs for the timestamp
[17:01] <edmoore> though I remember i didn't actually do revision for GCSEs and had to learn the art once i came here
[17:01] <edmoore> which was unpleasant
[17:01] <sbasuita>
[17:01] <sbasuita> A fairly uncommon expression used as a greeting similar to: "How's it going?"
[17:01] <sbasuita> John- Wassup wassup wassup in the hizzy?!
[17:01] <sbasuita> Ben- Nothin' man, how's tricks?
[17:01] <sbasuita> John- Not good man, I passed out last night while drinking and got teabagged.
[17:01] <sbasuita> Ben- Damn! That sucks man.
[17:01] <shellevil> being clever is shitty for revision habits
[17:01] <sbasuita> edmoore, mmm, haven't started revising yet
[17:01] <edmoore> being clever isn't enough for tripos revision
[17:02] <edmoore> unless you're doing something completely pure like maths
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[17:03] <sbasuita> edmoore, btw, i'm doing gcse exams next year
[17:03] <sbasuita> this year is internal exams
[17:03] <edmoore> it's like a a-level's worth of material every 2 weeks. mind job.
[17:03] <sbasuita> which are ten times harder
[17:03] <edmoore> oh ok
[17:03] <sbasuita> ; )
[17:03] <edmoore> fair enough
[17:03] <edmoore> so you're about 12 then?
[17:03] <sbasuita> ...
[17:03] <edmoore> 15?
[17:04] <sbasuita> ; )
[17:04] <edmoore> what subjects are you taking?
[17:04] <sbasuita> edmoore, the usual plus ancient greek, history, and geography (serious regret)
[17:05] <shellevil> edmoore: I mean - being clever early on encourages no revision habits in high school
[17:05] <sbasuita> For example, I just had a double period of geography. I learnt that SSSI stands for "Site of Special Scientific Interest". Apart from that, we laughed at the failure of everybody's powerpoint presentations on a boring case study.
[17:05] <edmoore> i don't like geography
[17:06] <edmoore> a bizarre mix of completely disparate things
[17:06] <edmoore> greek is useful. latin helps me whenever i go holiday
[17:06] <jcoxon> i like geography
[17:06] <sbasuita> greek is basically about learning lists of endings and words
[17:06] <sbasuita> which i don't mind
[17:07] <edmoore> at degree level you either right guff about housing policy or study rocks
[17:07] <jcoxon> silly ublox gps module, it responds to all the data you send it
[17:07] <edmoore> that basically seems to describe the two camps of geogrphy students
[17:07] <jcoxon> and responds with a unknown message, it should ignore it
[17:09] Action: sbasuita is disappointed that Bob Marley & The Wailers - Gold doesn't include three little birds
[17:09] <sbasuita> : (
[17:09] Action: sbasuita fires up gtk-gnutella
[17:09] <sbasuita> : )
[17:12] Action: jcoxon listens to the tones of rtty
[17:12] <jcoxon> am testing my flight 'puter
[17:13] <sbasuita> DanielRichman, might have to go to derby this weekend
[17:13] <sbasuita> DanielRichman, so maybe no radio hacking :(
[17:13] <DanielRichman> sbasuita, gah1
[17:13] <sbasuita> why am i still not bootstrapped to gnutella!!!?!?!?!?
[17:13] <sbasuita> so slow!
[17:14] <sbasuita> anyway, i'm off to install jaunty
[17:14] <sbasuita> DanielRichman, see you on the other side ;)
[17:15] <DanielRichman> sbasuita, enjoy. I'll install mine later.
[17:15] <sbasuita> DanielRichman, well, actually
[17:15] Action: sbasuita copies over his /home first
[17:15] <DanielRichman> Are you going to install with LiveCD or alternate CD?
[17:15] <sbasuita> DanielRichman, alternate
[17:15] <sbasuita> to set up the crypto stuff
[17:15] <DanielRichman> fail. You should use netboot.
[17:15] <DanielRichman> Crypto stuff? bah!
[17:15] <DanielRichman> no point.
[17:16] <sbasuita> DanielRichman, what's the point in having a mahoosive hard drive if you are scared to use more than 1% of it?
[17:16] <sbasuita> just pile up those isos
[17:16] <DanielRichman> sbasuita, who are you accusing?
[17:16] <sbasuita> >_>
[17:16] <DanielRichman> $ du -sh Music/
[17:16] <DanielRichman> 24G Music/
[17:16] <DanielRichman> Scared to use it?
[17:16] <sbasuita> $ du -sh Videos/
[17:16] <sbasuita> 53G Videos/
[17:17] <sbasuita> : P
[17:17] <DanielRichman> /dev/sda2 361G 28G 315G 9% /
[17:17] <DanielRichman> Is still more than 1%
[17:17] <sbasuita> /dev/sda6 210G 90G 110G 46% /
[17:17] <sbasuita> why are we doing this?
[17:18] Action: jcoxon orders zeusbot to destroy sbasuita and DanielRichman's hard drives
[17:18] <sbasuita> naow!
[17:18] <sbasuita> I should really start creating backups
[17:18] <sbasuita> argh
[17:18] <sbasuita> 85 gb /home
[17:19] <DanielRichman> zeusbot would be doing the world a favour. I have backups, and all of simrun's pirated films woould be gone
[17:19] <sbasuita> only have 65gb of unallocated partition on the hdd
[17:19] <sbasuita> going to have to reboot to gparted and shrink the current ubuntu install
[17:19] <sbasuita> brb then
[17:19] <DanielRichman> sbasuita, external hard drive.
[17:19] <sbasuita> too slow
[17:19] <DanielRichman> sbasuita, you could do a backup at the same time, now wouldn't that be a good idea.
[17:19] <DanielRichman> -.-
[17:19] <jcoxon> bbiab
[17:19] <sbasuita> pfff
[17:19] <sbasuita> backup
[17:19] <sbasuita> don't joke
[17:19] <sbasuita> ; )
[17:20] <sbasuita> bai
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[19:46] <DanielRichman> Is AVR little or big endian?
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[19:48] <DanielRichman> hmm... Would appear to be LE but I am not sure.
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[21:57] <Laurenceb> hi
[22:00] <shellevil> hi
[22:43] <Laurenceb> http://www.analog.com/en/mems-and-sensors/imems-gyroscopes/adis16405/products/product.html
[22:43] Action: Laurenceb drools
[22:47] <Laurenceb> its actually quite affordable wrt sparkfun kit
[22:47] <Laurenceb> and insanely small :D
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[22:54] <shellevil> quite, yes.
[22:54] <shellevil> One of the other things I need to get done for ebay.
[22:56] <Laurenceb> bbl
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[23:10] <jcoxon> evening all
[23:26] <Laurenceb> hi jcoxon
[23:26] <jcoxon> hey Laurenceb
[23:36] <DanielRichman> Laurenceb, are there any common pitfalls when using the UART on the AVR? Because mine is behaving weirdly. (I upload program, bootloader loads it then starts it, it seems to work fine. Press reset button or cycle power, and suddenly it's not TXing).
[23:37] <Laurenceb> hmm maybe the bootloader jams up
[23:37] <Laurenceb> you are using the preinstalled bootloader?
[23:37] <DanielRichman> Arduino yes. But I know that it gets to my program, (flashing led!)
[23:37] <Laurenceb> right
[23:37] <Laurenceb> so Tx only works from bootloader?
[23:37] <DanielRichman> The line it jams on is this one: loop_until_bit_is_set(UCSR0A, TXC0);
[23:38] <DanielRichman> If the bootloader runs, and reprogramms the flash, then it works fine
[23:38] <Laurenceb> hmm
[23:38] <DanielRichman> If the bootloader starts, detects no programming, runs the program it is not fine.
[23:38] <Laurenceb> the bootloader will setup the uart
[23:38] <Laurenceb> and leave the registers unchanged as it exits
[23:38] <Laurenceb> so I'm guessing the UART wasnt configured fully
[23:39] <DanielRichman> Right. I think I've considered UCSR0A, B, C and UBRR. Are there any others?
[23:40] <Laurenceb> cant remember offhand
[23:40] <Laurenceb> theres a few bits of code in the wiki
[23:41] <DanielRichman> Ok. I think I've got somewhere.
[23:41] <DanielRichman> The line I was getting stuck on, loop_until_bit_is_set(UCSR0A, TXC0) tries to check if the UART is ready...
[23:41] <DanielRichman> So I just ignored it for the very first character and sent anyway
[23:41] <DanielRichman> then it works fine.
[23:41] <DanielRichman> I guess the i-am-ready-bit doesn't get set to 1 on the first char...
[23:42] <Laurenceb> hmm maybe
[23:42] <Laurenceb> I dont think that should be the case
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[23:45] <Laurenceb> have you got it talking to the gps yet?
[23:56] <DanielRichman> Laurenceb, haven't tried. Got the gps talking to the pc (disabled avr uart, just attached gps TX to the FTDI USB2SERIAL chip)
[23:57] <Laurenceb> I see
[23:57] <Laurenceb> try the tsip code off the wiki :P
[23:58] <DanielRichman> Laurenceb, sbasuita forced me to write NMEA code.
[23:59] <Laurenceb> ewwwww
[23:59] <DanielRichman> I know.
[23:59] <Laurenceb> kill him with fire
[23:59] <DanielRichman> But we don't have to do any int/ascii conversions at all
[23:59] <DanielRichman> which is great.
[23:59] <Laurenceb> hmm unless you want to do any processing
[23:59] <Laurenceb> rprintf by pascal stang is small
[00:00] --- Sat Apr 25 2009