Re: [Paparazzi-devel] www.jobyrobotics.com

[Christophe De Wagter]

The MPU6000 is better in about every way than an IMU3000 + ADXL345. e.g. accelerometer measures @ 1kHz whatever the requested output rate, it has 2Mbit SPI (higher data rates, lower delays, less processor overhead) instead of I2C (nice in mobile phones but not in autopilots) and as soon as the documentation for the motion processor becomes available we could do the AHRS at 200Hz in the MPU itself saving processing power in the autopilot.

The new aspirin2 holds this chip. Code is already in: https://github.com/paparazzi/paparazzi/tree/aspirin2 

For arduimuv3 I do not know if the code of v2 is compatible.

-Christophe 

On Tue, Dec 13, 2011 at 8:26 AM, Hector Garcia de Marina <address@hidden> wrote:

Hello Limaiem,

arduIMU V3 is based on a new chip, the MPU-6000. In my opinion there still is few documentation and few experience with it. I don't know if the are firmware issues (in MPU-6000, not arduIMU), calibration issues, etc.

As far as I know V3 is pin compatible with V2, but I do not know if they share the same logic interface.

Héctor

On Tue, Dec 13, 2011 at 12:18 AM, limaiem imed <address@hidden> wrote:

and what about the ArduIMU+ V3 ?

I think that in the paparazzi wiki there is a sample using the ArduIMU V2.

Specifications:
Digital-output of 6 or 9-axis MotionFusion data in rotation matrix,
quaternion, Euler Angle, or raw data format
Tri-Axis angular rate sensor (gyro) with a sensitivity up to 131
LSBs/dps and a full-scale range of ±250, ±500, ±1000, and ±2000dps
Tri-Axis accelerometer with a programmable full scale range of ±2g,
±4g, ±8g and ±16g
Reduced settling effects and sensor drift by elimination of
board-level cross-axis alignment errors between accelerometers and
gyroscopes
Digital Motion Processing™ (DMP™) engine offloads complex
MotionFusion, sensor timing synchronization and gesture detection
MotionApps™ Platform support for Android, Linux, and Windows, with
Windows Phone platforms on the roadmap
Digital-output temperature sensor
Digital input on FSYNC pin to support video Electronic Image
Stabilization and GPS
Programmable interrupt supports gesture recognition, panning, zooming,
scrolling, free fall interrupt, high-G interrupt, zero-motion
detection, tap detection, and shake detection
Full Chip Idle Mode Supply Current: 5µA
On-chip timing generator with ±1% frequency variation over full
temperature range
User self test
10,000g shock tolerant

Other ArduIMU V3 features:

Pin compatible with ArduIMU V2.
Breadboard compatible (ArduIMU V2 was not!).
Smaller size (1.5" x 1.0").
Atmega CPU has more % available for other tasks.
The 6 analog pins are now available!
Arduino compatible and open source.
3 status LED's (RGB).
I2C port with 3.3V translation.
GPS port with FTDI autoswitch.
This device is suitable for ANY application from rockets to simple
movement detection.

Imed LIMAIEM
address@hidden


On Tue, Dec 13, 2011 at 12:05 AM, Christophe De Wagter

<address@hidden> wrote:
>
> Sorry, forgot the link: http://www.ryanmechatronics.com/ProductDetailCHIMU.htm
>
> -Christophe
>
>
>
>
> On Tue, Dec 13, 2011 at 12:04 AM, Christophe De Wagter <address@hidden> wrote:
>>
>> For planes the ryan mechatronics CHIMU works right out of the box with paparazzi.
>>
>> If you have a spare serial port you can connect it via the easy usart interface, or if you don't have spare uarts or want even more performance there is a high speed SPI interface.
>>
>> The AHRS filter runs in the imu with GPS corrections sent to the device, and so far it was only tested on fixedwings.
>>
>> -Christophe
>>
>>
>>
>>
>> On Mon, Dec 12, 2011 at 10:25 PM, limaiem imed <address@hidden> wrote:
>>>
>>> In the paparazzi website there are a link to another provider:
>>> http://thequadshot.com/
>>> for Jobyrobotics, why don't you try to phone them ?
>>> Regards,
>>>
>>> Imed LIMAIEM
>>> address@hidden
>>>
>>>
>>>
>>> On Mon, Dec 12, 2011 at 10:09 PM, Cédric Marzer <address@hidden> wrote:
>>>>
>>>> Hello all,
>>>> I still don't have any news from Jobyrobotics. I ordered and paid for an aspirin IMU on the 16th of november and didn't get any feedback. The problem is definitly more serious than just a problem with the website. In my opinion the link on the paparazzi page should be removed asap.
>>>> Now the question remains : where could I get an IMU for my paparazzi plane ? If there is any other IMU that works out of the box with the paparazzi I would be interested.
>>>> Any help appreciated.
>>>> Cheers,
>>>> Cédric
>>>>
>>>>
>>>> _______________________________________________
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>>>
>>>
>>>
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>>
>
>
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--
Héctor



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