highaltitude.log.20060816

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[14:35] <jcoxon> phatmonkey, got it working :-D
[14:45] <phatmonkey> awesome!
[14:45] <phatmonkey> what did you do?
[14:46] <jcoxon> i emailed pascal the writer of the driver
[14:46] <jcoxon> i've forwarded it to you
[14:46] <phatmonkey> got it
[14:47] <phatmonkey> interesting
[14:47] <phatmonkey> i might work on some code after a late lunch
[14:48] <jcoxon> basically we need to feed in "\200"
[14:48] <jcoxon> say to straighten the wheels
[14:48] <phatmonkey> yuh
[14:49] <phatmonkey> do you want subversion access? then you can see what code we've done so far
[14:49] <jcoxon> that would be cool
[14:49] <jcoxon> though don't hurry
[14:49] <phatmonkey> i'll finish off a few little bits, then i can make a branch for controlling cars
[14:49] <jcoxon> i've got quite a bit of work just fiddling to do first
[14:49] <phatmonkey> yeah
[14:51] <phatmonkey> i'll try and keep as much of the code the same as possible
[14:51] <phatmonkey> then it'll be great for testing all the glider code
[14:51] <phatmonkey> i wonder how rocketboy's getting on with that modem, live communication would be great
[14:51] <phatmonkey> testing that and all
[14:52] <jcoxon> i think he was goind to launch with either laurence or nova
[14:52] <jcoxon> which ever was ready first
[14:52] <jcoxon> hmmm my front steering has a slight ofset
[14:53] <jcoxon> offset*
[15:11] <phatmonkey> it should be quite easy to adjust the mechanism
[15:11] <phatmonkey> or just set a different centre point!
[15:11] <jcoxon> yeah i know
[15:12] <jcoxon> but i've got to remind myself to make the system generic
[15:12] <jcoxon> and then add a little bit specifically for Nomad
[15:24] <jcoxon> right time for a little test run
[15:24] <jcoxon> bbl
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[15:51] <jcoxon> well the good news it that it works
[15:52] <phatmonkey> nice
[15:52] <phatmonkey> have you thought about any live communication?
[15:52] <phatmonkey> do you have a wifi widget?
[15:52] <jcoxon> i've got one better then that :-p
[15:53] <jcoxon> i have radio modems
[15:53] <phatmonkey> ah of course
[15:53] <jcoxon> though one of them is slightly broken
[15:53] <phatmonkey> oh
[15:53] <jcoxon> nothing that can't be fixed
[15:53] <phatmonkey> our ground station currently relies on the slug to serialise the data
[15:54] <phatmonkey> the slug and the gumstix are both arm processors with the same endian, so it's simple to transfer data
[15:54] <phatmonkey> freddie mentioned something about er, i'll get him on
[15:54] <phatmonkey> i know little about this sort of thing
[15:55] <jcoxon> my radio modems act just like a serial port extender
[15:55] <phatmonkey> yeah
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[15:55] <Freddie> here!
[15:55] <phatmonkey> hey fred
[15:56] <jcoxon> hey
[15:56] <phatmonkey> say we are transferring data down a serial radio link
[15:56] <phatmonkey> what sort of options do we have on the other end for serialising/reading data
[15:56] <phatmonkey> especially if there is no other arm processor like the slug
[15:56] <Freddie> what do you mean
[15:57] <phatmonkey> there was that X-something thing you were talking about, but i'm not sure what it is
[15:57] <Freddie> well, if we know the byte order a bit of bit-twidelling
[15:57] <phatmonkey> floats?
[15:57] <Freddie> should be able to get it into the systems native format
[15:57] <Freddie> or XDR
[15:57] <phatmonkey> that was it
[15:59] <Freddie> or convert the information to a string
[15:59] <jcoxon> hmmmm
[15:59] <jcoxon> i've always used strings
[15:59] <Freddie> very ugly solution, wastes bandwidth, processor time, memory and precision
[16:00] <phatmonkey> james is making an autonomous car (have i told you?)
[16:00] <Freddie> indeed
[16:00] <phatmonkey> it would be nice to just plug the serial modem straight into the laptop for data
[16:00] <phatmonkey> and in our case too
[16:00] <phatmonkey> it's a bit silly relying on the slug
[16:00] <Freddie> well, a simple way to test it is to
[16:00] <phatmonkey> how does XDR work?
[16:00] <Freddie> get the gumstix to dump a float to the modem
[16:00] <Freddie> have an application read it
[16:01] <Freddie> convert it to a float or whatever and then print it
[16:01] <Freddie> if the value is the same, bingo
[16:01] <phatmonkey> yuh
[16:01] <phatmonkey> you would be using your ibook, james?
[16:02] <jcoxon> outside yes
[16:02] <phatmonkey> hehe, we're all the ibook crew
[16:02] <jcoxon> though recently i've been on my desktop
[16:02] <phatmonkey> nice compatibility that
[16:02] <jcoxon> dual monitors :-p
[16:02] <phatmonkey> i have my desktop machine and my ibook with synergy!
[16:02] <Freddie> my desktop computers PSU has decided to go blow itself up
[16:02] <phatmonkey> one mouse, one keyboard for two computers and two screens
[16:02] <phatmonkey> very nice
[16:02] <phatmonkey> ouch, that sucks
[16:03] <phatmonkey> was it a nice psu?
[16:03] <Freddie> Q-tec PSU's, as far as I know, are being bought by middle eastern terrorists
[16:03] <Freddie> all you need to do is turn them on and they blow up
[16:04] <phatmonkey> hahaha
[16:04] <phatmonkey> yes, i have one of them somewhere
[16:04] <phatmonkey> i think it died
[16:04] <phatmonkey> well you can't expect much from a £15 500w power supply o0
[16:04] <Freddie> kettle lead: ?5, Q-tec PSU ?15, having it blow up and take your hardware with it: priceless (well, about ?1200)
[16:05] <phatmonkey> is the other hardware ok?
[16:05] <Freddie> I believe so
[16:05] <phatmonkey> that's good
[16:05] <Freddie> boots up for a second and then turns off, sometimes for 10 min if I am lucky
[16:05] <phatmonkey> back up your hard disk onto your new machine just in case
[16:05] <jcoxon> brb just got ti update my nvidia drivers
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[16:06] <phatmonkey> when do you thin kthe tv card will come?
[16:06] <Freddie> well the cheque has been sent off today
[16:06] <Freddie> so soon I hope
[16:07] <Freddie> not sure what I am going to do about the areial
[16:07] <Freddie> can either split/dup the outside one (which has no CH5)
[16:07] <Freddie> or run the one down from the loft to the living room (which already has a splitter/amp on it)
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[16:19] Action: phatmonkey screams
[16:19] <jcoxon> what have i missed!
[16:19] <phatmonkey> busybox has no nohup
[16:19] <phatmonkey> argh
[16:20] <phatmonkey> i really need to create a custom busybox with all the stuff i need
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[16:23] <EvilGuru> will `app &' not do the trick?
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[16:26] <jcoxon> hmmm. now that it actually works its time to think more about what i actually want Nomad to do :-p
[16:26] <phatmonkey> that's only for a single session silly
[16:27] <phatmonkey> hehe
[16:27] <phatmonkey> yeah
[16:27] <phatmonkey> the code we have in place for the glider will be able to do simple waypoint management for a car without much modification
[16:27] <jcoxon> excellent
[16:27] <jcoxon> though being on the ground will be interesting
[16:27] <phatmonkey> but the code hasn't been tested as a whole yet
[16:27] <phatmonkey> hehe
[16:28] <jcoxon> in the air you've got more freedom
[16:28] <phatmonkey> well, pitch has just been transformed into throttle
[16:28] <phatmonkey> pitch is pretty much throttle for a glider
[16:31] <phatmonkey> hmm, gps is struggling to get a lock
[16:31] <phatmonkey> maybe because it's cloudy
[16:31] <phatmonkey> ... and i'm inside
[16:33] <phatmonkey> hokay, it gets a fix right up by the window
[16:38] <EvilGuru> the code should be quite portable
[16:39] <jcoxon> right i'll bbl
[16:39] <phatmonkey> see ya
[16:40] <EvilGuru> so for what is the intended purpose of the car
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[17:45] <jcoxon> hey i'm back
[17:45] <jcoxon> EvilGuru, thats the thing
[17:45] <jcoxon> there isn't an purpose :-p
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[19:19] <phatmonkey> hey james
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[20:26] <jcoxon> hey ben
[20:52] <phatmonkey> i think i need to do a uncontrolled payload
[20:53] <jcoxon> oooo exciting
[20:53] <phatmonkey> i pretty much have everything i need, apart from the radio
[20:53] <jcoxon> do you need it?
[20:53] <jcoxon> :-p
[20:53] <phatmonkey> i don't want to lose it...
[20:54] <jcoxon> do you want a beacon
[20:54] <jcoxon> or modems?
[20:54] <phatmonkey> modems would be a good idea i suppose
[20:54] <phatmonkey> steve is working on something isn't he?
[20:54] <jcoxon> i'm not sure they are ready :-P
[20:54] <jcoxon> yup
[20:54] <jcoxon> though i haven't heard from him since last week
[20:54] <jcoxon> send him and email...
[20:55] <phatmonkey> yeah, alright
[20:56] <phatmonkey> so, hmm, what do i have to do. get a payload package. get a balloon/helium. simplify the software. sort out a cutdown.
[20:58] <jcoxon> yup
[20:58] <jcoxon> get permission
[20:58] <jcoxon> or go to cambridge
[20:58] <phatmonkey> i'll just do it at cambridge i guess, probably easiest
[20:59] <phatmonkey> i'm back at school in a month's time, depends if i want to get something up before then
[21:00] <jcoxon> well the permission finishes on the 16th sept
[21:01] <phatmonkey> i think it would be a good idea to do the charity release with an uncontrolled payload
[21:01] <phatmonkey> that's in november, it would be good to test it before then, that's all really
[21:01] <jcoxon> yeah
[21:01] <jcoxon> well if you want to launch at cam i'll be happy to help
[21:02] <phatmonkey> nice, alright
[21:02] <jcoxon> would have to ask carl as it would be from churchill
[21:02] <jcoxon> though they don't really seem to care
[21:02] <phatmonkey> do you have that balloon filler widget?
[21:02] <phatmonkey> i might need to make one of my own
[21:02] <phatmonkey> ok
[21:02] <jcoxon> yup
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[21:09] <jcoxon> yay fix the radio modem
[21:10] <phatmonkey> nice
[21:10] <jcoxon> of couse the problem is that they are ttl
[21:10] <jcoxon> and i'm using a waysmall
[21:11] <phatmonkey> get a robostix? hehe
[21:12] <jcoxon> hmmmmm
[21:13] <jcoxon> http://www.gumstix.org/tikiwiki/tiki-index.php?page=20_GPIO#comments&highlight=20
[21:13] <jcoxon> IRTXD and IRRXD
[21:15] <icez> does the MiHAB guy come here?
[21:15] <jcoxon> yup
[21:15] <jcoxon> Laurence
[21:15] <icez> he's using AVRs :D:D:D
[21:16] <jcoxon> yeah
[21:20] <jcoxon> hmmmm - how should i power my gps?
[21:20] <jcoxon> another battery pack?!?!
[21:23] <Tiger^> a dynamo? :P
[21:24] <jcoxon> hehe
[21:27] <phatmonkey> yay, a real use for the mailing list
[21:28] <jcoxon> indeed
[21:35] <jcoxon> phatmonkey, are you crafting a reply to Pete?
[21:44] <phatmonkey> not right now
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[23:19] <jcoxon> hey rocketboy
[23:27] <rocketboy> hi - cant stay long
[23:28] <rocketboy> yourt back then?
[23:29] <jcoxon> yup i'm back
[23:29] <rocketboy> did it all go ok?
[23:29] <jcoxon> was wondering how everything was going
[23:29] <jcoxon> yeah had a great time
[23:30] <rocketboy> jcoxon is a lucky sod
[23:30] <jcoxon> www.srcf.ucam.org/~jac208/pegasus/Niger/
[23:31] <rocketboy> wow - looks like lots of fun
[23:31] <rocketboy> big baloons
[23:32] <jcoxon> :-)
[23:33] <jcoxon> any news from the nova team?
[23:33] <jcoxon> i sent carl an email this evening
[23:33] <rocketboy> I've been working on the radio stuff - will be ready for a launch (or 2) next week
[23:34] <rocketboy> yes - they should be ready next week - wether permitting
[23:34] <rocketboy> I have the next 3 weeks off - wohooo
[23:34] <jcoxon> oh cool
[23:34] <jcoxon> so they finally got permission
[23:34] <jcoxon> :-)
[23:35] <jcoxon> i'm taking a small break
[23:35] <rocketboy> may even get round to sending somthing up myself in a ciuple of weeks time
[23:35] <jcoxon> :-)
[23:35] <rocketboy> oh -ok I can imagine
[23:35] <jcoxon> not going to start balloon stuff till at least sept
[23:35] <jcoxon> got a few projects running - all contributing
[23:35] <jcoxon> and will still be mulling over ideas
[23:36] <jcoxon> if you need help with a launch get in touch
[23:36] <rocketboy> Laurance is ready for another launch too
[23:36] <jcoxon> oh wow
[23:36] <jcoxon> its all go
[23:36] <rocketboy> sure is
[23:37] <rocketboy> I must get you guys to tell me how to add a serial interface to moble phones some time
[23:37] <jcoxon> oh henry or Tiger^ are the people to talk to
[23:37] <jcoxon> i use gnokii - all sorted
[23:37] <rocketboy> OK - looks relativly simple
[23:38] <rocketboy> ok i'll look that up
[23:39] <jcoxon> i'm around now till term in october so if you need help get in touch
[23:39] <jcoxon> i'm working on a small communication module which can fly on its own but also be attached to a larger payload
[23:40] <rocketboy> sounds good
[23:40] <rocketboy> yes a sort of modular system would be good
[23:40] <jcoxon> truthfull it wouldn't take me long to have something ready
[23:40] <jcoxon> couple of days :-)
[23:41] <rocketboy> spiffing
[23:41] <jcoxon> http://www.pegasushabproject.org.uk/nomad/index.html
[23:41] <jcoxon> this is my project for the moment
[23:41] <jcoxon> learning about servos
[23:43] <rocketboy> looks good - anyways I have to go now - talk 2 u over the next few days
[23:43] <jcoxon> cya
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[00:00] --- Thu Aug 17 2006