highaltitude.log.20080617

[00:49] <gerard_mp> well, good night ;)
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[13:56] <Laurenceb> hi edmoore
[13:56] <edmoore> hi laurenceb
[13:57] <Laurenceb> how are you?
[13:57] <edmoore> not bad
[13:57] <edmoore> might have a nap
[13:57] <edmoore> you?
[13:57] <Laurenceb> going home today
[13:57] <edmoore> cool
[13:57] <Laurenceb> last day at oxford :P
[13:58] <edmoore> i'm quite looking forward to leaving here now
[13:58] <Laurenceb> yes it gets tedious
[13:59] <Laurenceb> I've done some more work on the TSIP code, made used a state machine
[14:00] <edmoore> cool. it's a nice gps
[14:00] <Laurenceb> the principle seems to be very similar to what I've been playing with
[14:01] <Laurenceb> ASIC gives 1 bit I and Q samples
[14:01] <Laurenceb> then a 32 bit uC
[14:06] <Laurenceb> just need a bit banged uart to configure it now
[14:07] <Laurenceb> and I may add a bit banged rx as well for configuration over serial, just for super awesomeness
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[15:07] <Laurenceb> edmoore: how many UARTs does your arm7 have?
[15:08] <edmoore> 2
[15:08] <Laurenceb> I see
[15:08] <Laurenceb> but your using usb for the "terminal" interface?
[15:09] <Laurenceb> have you got that working?
[15:09] <edmoore> not yet
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[15:10] <Laurenceb> it looks tricky
[15:10] <edmoore> usb generally is
[15:11] <edmoore> will share the code once we get it up and running
[15:11] <Laurenceb> thanks
[15:11] <Laurenceb> I might use it to make a gps :D
[15:11] <edmoore> lol
[15:11] <Laurenceb> although it looks like an FPGA is pretty essencial
[15:13] <edmoore> really?
[15:13] <edmoore> i know on sirfs the arm7 core is only at about 20% duty cycle
[15:14] <edmoore> so you could easily run the whole flight puter on one
[15:14] <Laurenceb> sure
[15:14] <Laurenceb> but the correlation is a pain
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[16:15] <Laurenceb> hency why sirf has a huge correlation unit
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[16:25] <Laurenceb> I wish there was some sort of computationally efficient algorithm to do this...
[16:26] <Laurenceb> a FFT will do if you want to search in time, but you need to search for signals in time/doppler shift spac
[16:26] <Laurenceb> *space
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[20:18] <Laurenceb> cya all
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[20:21] <gerard_mp> hi
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[23:18] <jcoxon> evening all
[23:42] <jcoxon> this is interesting:
[23:42] <jcoxon> http://www.jandrew-elec.com/XT65_Datasheet.pdf
[23:42] <jcoxon> and alternative to Telit
[00:00] --- Wed Jun 18 2008