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matthewlim
- 25, Male
- Pittsburgh, PA
- United States
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matthewlim replied to Chris Anderson's discussion 'Discussion forum for Sparkfun 3-axis IMU-based autopilot board'
Hm... I don't know if completely understand why you use the most significant portion, i'll have to think about it.
We're supposed to have this done by May 1st. Right now, we're orienting the board upside down (underneath the…
matthewlim replied to Chris Anderson's discussion 'Discussion forum for Sparkfun 3-axis IMU-based autopilot board'
Bill,
In rmat.c, in the function roll_pitch_drift, We noticed that you used the union of the longww struct so that you can take advantage of individual bytes or the entire number... When accumulating your integral, you use the lower byte as your…
matthewlim replied to Chris Anderson's discussion 'Discussion forum for Sparkfun 3-axis IMU-based autopilot board'
I see...
So, all numbers that are noted as "fractional" in rmat.c are all 2.14 numbers? Doesn't the dsPIC340F4011 see them as Q.15?
matthewlim replied to John_Mac's discussion 'Discussion of application of UAV Dev Board to CCPM RC Helicopters'
Oh man.
Points 1 and 2 are a little less than encouraging, haha.
We're using an Exceed-RC Genesis 450, i believe it is CCPM and it does have a 3 servo swashplate.
Right now, all of us are pretty bad at flying it :/
matthewlim replied to Chris Anderson's discussion 'Discussion forum for Sparkfun 3-axis IMU-based autopilot board'
Bill,
So, i've fried the 5V regulator on the board. The board still works, but at a lower MIPS.
Do you happen to know the part number for the regulator? In the hardware schematic, I believe it is labeled as U6, and it's a small 5 pin…
matthewlim replied to Chris Anderson's discussion 'Discussion forum for Sparkfun 3-axis IMU-based autopilot board'
Okay, great. That was very helpful.
I have another question..
2.14 fractional representation... that means, 2 bits to represent integer part, and 14 bits to represent the fractional part, right?
and are those most significant bits -2^1 and -2^0…
matthewlim replied to Chris Anderson's discussion 'Discussion forum for Sparkfun 3-axis IMU-based autopilot board'
Wow... Okay. That is much clearer than the manual.
Thank you!
matthewlim replied to John_Mac's discussion 'Discussion of application of UAV Dev Board to CCPM RC Helicopters'
Hello,
Thanks for showing me this thread. Our group is composed of mainly programmers, none of which have any helicopter flying experience. I actually crashed the helicopter into a coffee table the other day, and one of my partners is replacing the…
matthewlim replied to Chris Anderson's discussion 'Discussion forum for Sparkfun 3-axis IMU-based autopilot board'
BIll,
I'm part of a group that is also currently trying to stabilize a helicopter using your dev board.
As of now, we are using the ADC converter to convert the analog voltages from the accelerometers/gyros on the board. Looking at the…
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