[psas-avionics] Sparkfun Free Day

2010-01-06 Thread Barton C Massey
This looks like kind of a fiasco, but a fun one. Sparkfun is giving everyone who orders tomorrow up to the first $100 of their order free, up until Sparkfun has given out $100K. http://www.sparkfun.com/commerce/news.php?id=321 Thought folks here might like to know. :-) Bart

Re: [psas-avionics] Digital filters

2009-11-03 Thread Barton C Massey
to directly achieve the result you want is likely to be very, very long. Think 1000 taps. Quoting Barton C Massey b...@cs.pdx.edu: Caveat: I have no idea what I'm talking about. Act accordingly. I have no idea how to interpret this response :) This could be sarcasm, and you *do* know

Re: [psas-avionics] Fwd: Multiphysics Workshop in Tigard/Portland (Sep 23)

2009-09-07 Thread Barton C Massey
Looks interesting---thanks for forwarding! That's the first day of Linux Plumbers Conf, so I probably won't be available. Hopefully someone else will. Bart In message 20090903142153.g5wf6qzlz4044...@webmail.dsl-only.net you wrote: This may be of interest to people doing modeling?

Re: [psas-avionics] TubeSat

2009-08-04 Thread Barton C Massey
Hadn't seen it. Thanks much for the link! Have to admit that I'm a little skeptical--$240,000 per launch isn't very much to put a bunch of mass in LEO. But who knows; things have gotten a lot cheaper lately. I've forwarded this to the PSAS folks; we'll see what they say about it. Maybe we'll

Re: [psas-avionics] [PSAS] Flight data from today's PSAS adventures

2009-06-02 Thread Barton C Massey
Given your experience, the youth of TM's software and hardware, and the prediction of supersonic flight by the simulator, I'm willing to believe we may well have been supersonic or at least transsonic on Saturday. However, it will be really hard to tell, I think. We might be able to cal some

Re: [psas-avionics] [PSAS] Flight data from today's PSAS adventures

2009-06-02 Thread Barton C Massey
Keep in mind that all the instruments we used for those velocity measurements have some interesting limitations at this point. The pressure altimeter is known not to work so well in the transsonic region. The z-axis IMU hasn't yet been calibrated terribly effectively. The GPS is quite inaccurate

Re: [psas-avionics] code question...

2009-04-11 Thread Barton C Massey
In message 49df660f.1060...@ytivarg.com you wrote: Barton C Massey wrote: It's a less-than-good feature of C. Case labels are labels, and thus must label a statement. For what it's worth, in object-oriented land (I mainly do Java these days) case statements are also (supposed

Re: [psas-avionics] code question...

2009-04-09 Thread Barton C Massey
In message 8f5d905c0904091948y526182edm16cb2bf4d5a42...@mail.gmail.com you wrote: It turns out wrapping that last case in curly-braces makes everything happy and compileable... Not that this is comfortable... It's a less-than-good feature of C. Case labels are labels, and thus must label a

Re: [psas-avionics] CAN on the MPC5200 FC: T-3 weeks until a no-go.

2009-02-02 Thread Barton C Massey
In message 498643ed.7060...@psas.pdx.edu you wrote: ...has lots of nice features like data identified packets instead of node addresses, etc. It seemed to me like this particular feature was a pain when we tried this before? I thought we ended up kludging a node addressing scheme that borrowed

Re: [psas-avionics] CAN on the MPC5200 FC: T-3 weeks until a no-go.

2009-02-02 Thread Barton C Massey
In message 20090202020857.stbzev6v68cc4...@webmail.pdx.edu you wrote: An application layer that floods the bus (but doesn't invoke transceiver safeguards) will cause enough error frames that the CAN controller will go bus-off and stop transmitting. So there are limits on the amount of bus

Re: [psas-avionics] Looking for: Olimex LPC-P2148 dev board

2008-02-02 Thread Barton C Massey
They should be down in FAB 85-7; get one of the folks with a key to let you in. I'll be around some next week. Bart In message [EMAIL PROTECTED] you wrote: Andrew mentioned there may be several of these that are not being used right now. If you have one you are not using do you

[psas-avionics] Atmel AVR32

2008-01-30 Thread Barton C Massey
I thought this might be of interest to someone. Bart ---BeginMessage--- Hello, Atmel is offering a technical seminar series on AVR32 UC3 32-bit Flash Microcontroller in the Portland, OR area on 03/25/2008. Seminar objectives The purpose of this one-day seminar is to deliver a technical

Re: [psas-avionics] LPC-P2148 dev board from Sparkfun, lsp21isp, toolchain and wiggler jtag

2008-01-28 Thread Barton C Massey
If you want to borrow one of our 2148 boards to compare, we have some around. Bart In message [EMAIL PROTECTED] you wrote: I just tried flash magic. lpc21isp is the linux command line version of that functionality. It fails to work as well. Im starting to think my 2148 board is

Re: [psas-avionics] Vbattery vs Vusb

2008-01-08 Thread Barton C Massey
In message [EMAIL PROTECTED] you wrote: I just re-read the entire Capstone report, and I can't find any justification for the use of a separate power supply. Aaaargh, sorry. I clearly remember discussing the power supply voltage issue in detail during the capstone project. Switching the

Re: [psas-avionics] Initial FreeRTOS checkin

2007-08-06 Thread Barton C Massey
Nice! Thanks hugely for a cool piece of work. Did Bdale Garbee's instructions about how to build and run all this from Debian Linux ever get incorporated with your instructions? I really don't want to get out Windows for this if I can avoid it... Bart In message [EMAIL PROTECTED] you

Re: [psas-avionics] [Fwd: Re: PSAS Parts order]

2007-07-23 Thread Barton C Massey
office Dave, if you need them before Bart recovers from his surgery, just let me know and I will let you into his office. Ne' Original Message Subject: Re: PSAS Parts order Date: Wed, 18 Jul 2007 12:55:30 -0700 From: Barton C Massey [EMAIL PROTECTED