Re: [Paparazzi-devel] ArduIMU+ V3??

[Anish Mohammed]

Hi Stephen,
 Thanks for info. I have been tinkering with various (mostly open source) 
AP/flight controllers. So have been thinking of doing a comparison of those 
platforms. By the looks of things you have looked around quite a bit, wondering 
if u might share the data you have of various AP's offline. The various 
Wikipedia entries seem to be a bit biased or out of date :(
Regards
Anish 

Anish Mohammed
Twitter: anishmohammed
http://uk.linkedin.com/in/anishmohammed

On 18 Apr 2012, at 01:31, Stephen Dwyer <address@hidden> wrote:

> Hi Anish,
> 
> I was thinking performance in terms of speed, features, sensor
> quality, output quality etc. I don't know all that much about AHRS
> systems, but the ArduIMU is rather slow (50Hz), and the atmega's speed
> and memory size really limits possibilities (I worked with a v2 for a
> bit and found the flash and ram got filled up pretty fast adding
> additional features). Most other IMUs/AHRSs/INSs have high update
> rates. I could think of some examples like the Ryan Mechatronics
> CHIMU, VectorNav VN-100, MicroStrain units, etc. I believe the
> aspirin/other sensor support right on paparazzi will give better
> performance.
> 
> Of course, you could argue for a long time about what is best :).
> 
> -Stephen Dwyer
> 
> On Tue, Apr 17, 2012 at 2:00 PM, Anish <address@hidden> wrote:
>> Out of curiosity which one's would u consider as high performance
>> AHRS units :)
>> Sent from my BlackBerry® wireless device
>> 
>> -----Original Message-----
>> From: Stephen Dwyer <address@hidden>
>> Sender: address@hidden: Tue, 17 Apr 2012 10:56:54
>> To: <address@hidden>
>> Reply-To: address@hidden
>> Subject: Re: [Paparazzi-devel] ArduIMU+ V3??
>> 
>> Hello,
>> 
>> You will definitely have to do some code modifications to the ArduIMU
>> code and possibly the paparazzi code to be able to use ArduIMU v3. In
>> v2 the i2c port was unused, and thus made into an i2c slave on the
>> arduimu, so paparazzi could request measurements as desired.
>> 
>> In v3, the magnetometer is attached to the atmega i2c port, which is
>> probably configured as a master. So, you will have change the
>> interface method to paparazzi, or not use the mag in the arduimu code
>> and reconfigure to use i2c as a slave on the atmega, then possibly
>> also use the twog to sample the mag if you would like these readings.
>> 
>> It is probably achievable without too much effort if you look at the
>> sample modified firmware for v2 in
>> sw/airborne/firmwares/non_ap/arduimu_Firmware_WithGps/.
>> 
>> Another option might be to purchase the v2 from Sparkfun, they seem to
>> have some left in stock.
>> 
>> Keep in mind the ArduIMUs are certainly not the most high performance
>> AHRS units, compared to other options.
>> 
>> Hope that helps.
>> 
>> Thanks,
>> -Stephen Dwyer
>> 
>> On Tue, Apr 17, 2012 at 3:12 AM, iman shirdareh
>> <address@hidden> wrote:
>>> Hi
>>> 
>>> I want to buy IMU from diydrones but they doesn't have ArduIMU V2 , they
>>> have ArduIMU V3 .
>>> 
>>> Now may I to use ArduIMU V3 with my Paparazzi TWOG autopilot?
>>> 
>>> 
>>> 
>>> Thanks a lot..................Iman
>>> 
>>> _______________________________________________
>>> Paparazzi-devel mailing list
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>>> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>>> 
>> 
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