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Old Aug 30, 2011, 09:35 AM
lothar2048 is offline
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New in all but 20Y hobbyist
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Quote:
Originally Posted by Dialfonzo View Post
Another nubie question..

What it the difference between Compass and Magnetometer ?
A compass is showing north and has a ruler for each angle from north.

A magnetometer is using magnetic field to point to. It is not necessary pointing to north, but to the closer magnetic source.

Compass is different from magnetometer but can acheive a compass rule if used in conjuction with a GPS handler. So why so many peoples are using magnetometers to achieve a compass ruler.

Cheers.
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Old Aug 30, 2011, 03:21 PM
warthox is offline
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testing different things with the mwc fw 1.8 on a quad with flyduino mwc board + freeimu ms.

0:34 low altitude aerobatics
1:30 acc emergency activation
2:11 frisbee

mwc quad // mixed fw 1.8 stuff (3 min 2 sec)
Old Aug 30, 2011, 04:27 PM
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Friend is a 4 letter word...
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M...Impressive as always Very nice "panic-button" and Frisbee demonstrations!
Old Aug 31, 2011, 03:01 AM
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Fabio Varesano
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@warthox fantastic! thanks for sharing!!!
Last edited by fax8; Aug 31, 2011 at 03:08 AM.
Old Aug 31, 2011, 12:47 PM
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Since I know Alex reads this thread, maybe you have an idea what's going on?
AfroWii 1.8 patch1 strange flipping (0 min 26 sec)


I ported mwii to stm8s, the acc/gyro seem to be responding OK in GUI, and the 3d model changes accordingly, but it keeps flipping between top and upside down (or whatever it means when it keeps inverting the 'quadcopter-x' text.

Code at http://code.google.com/p/afrodevices...runk%2Fafrowii

Any quick guesses as to the cause?
Old Aug 31, 2011, 12:57 PM
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Fabio Varesano
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My guesses: overflow or swapped read of I2C 16 bit int.
Old Aug 31, 2011, 12:59 PM
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Yes, except I'm not using I2C. Gyros are analog, adc is 10bit, and adxl reading over SPI is correct.
What cause the flip, gyro or acc data?

Ahh,, I wonder if it's this

#define fp_is_neg(val) ((((unsigned char *)&val)[3] & 0x80) != 0)

EDIT: That was it.
Old Aug 31, 2011, 01:53 PM
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Thanks Fabio, thanks Jussi - my little "pussy" arrived today It was very fast delivery (Prague, CZ)
Old Aug 31, 2011, 02:23 PM
braindead4554 is offline
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^^^ that term means something else here.... lol
Old Aug 31, 2011, 02:57 PM
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Fabio Varesano
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@peepoo awesome! Let us know how it works for you!
Old Aug 31, 2011, 07:56 PM
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Quote:
Originally Posted by peepoo View Post
Thanks Fabio, thanks Jussi - my little "pussy" arrived today It was very fast delivery (Prague, CZ)
I have to ask, what does 'pussy' mean in Prague?
Old Sep 01, 2011, 03:05 AM
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If you noticed, i wrote it in english - i think you understand Thats why its written in quotation marks. Omfg!
Old Sep 01, 2011, 06:19 AM
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well seeing as this is a world wide forum, words from different languages mean something totally different than what your language might be. Hince thats why bob asked you.
Last edited by braindead4554; Sep 01, 2011 at 02:10 PM.
Old Sep 01, 2011, 06:33 AM
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I only give to my FreeIMU "familiar nickname" Back to thread...
Old Sep 01, 2011, 07:56 AM
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Quote:
Originally Posted by braindead4554 View Post
well seeing as this is a world wide forum, words from different languages mean something totally different than what your language might be. Hince thats why bob asked you.

FYI. you might want to be careful on what words you use so your post don't get reported
reported? lighten up, dude. in this hobby one could easily substitute a female creature for a piece of circuit board.

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