FreeFlightIMU/FreeIMU - libre digital IMU´s - Page 159 - RC Groups
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This thread is privately moderated by JussiH, who may elect to delete unwanted replies.
Aug 30, 2011, 09:35 AM
New in all but 20Y hobbyist
lothar2048's Avatar
Quote:
Originally Posted by Dialfonzo
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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Aug 30, 2011, 03:21 PM
Registered User
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)
Aug 30, 2011, 04:27 PM
Friend is a 4 letter word...
JussiH's Avatar
M...Impressive as always Very nice "panic-button" and Frisbee demonstrations!
Aug 31, 2011, 03:01 AM
Fabio Varesano
fax8's Avatar
@warthox fantastic! thanks for sharing!!!
Last edited by fax8; Aug 31, 2011 at 03:08 AM.
Aug 31, 2011, 12:47 PM
Suspended Account
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?
Aug 31, 2011, 12:57 PM
Fabio Varesano
fax8's Avatar
My guesses: overflow or swapped read of I2C 16 bit int.
Aug 31, 2011, 12:59 PM
Suspended Account
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.
Aug 31, 2011, 01:53 PM
Registered User
Thanks Fabio, thanks Jussi - my little "pussy" arrived today It was very fast delivery (Prague, CZ)
Aug 31, 2011, 02:23 PM
Multicopter Addict
braindead4554's Avatar
^^^ that term means something else here.... lol
Aug 31, 2011, 02:57 PM
Fabio Varesano
fax8's Avatar
@peepoo awesome! Let us know how it works for you!
Aug 31, 2011, 07:56 PM
Registered User
bob4432's Avatar
Quote:
Originally Posted by peepoo
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?
Sep 01, 2011, 03:05 AM
Registered User
If you noticed, i wrote it in english - i think you understand Thats why its written in quotation marks. Omfg!
Sep 01, 2011, 06:19 AM
Multicopter Addict
braindead4554's Avatar
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.
Sep 01, 2011, 06:33 AM
Registered User
I only give to my FreeIMU "familiar nickname" Back to thread...
Sep 01, 2011, 07:56 AM
Suspended Account
Quote:
Originally Posted by braindead4554
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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