Hi Chris,
We have implemented the 6DoF Quaternion output on the MPU, but have not evaluated the results yet. Due to other engineering obligations, our work and test on the MPU's Digital Motion Processor (DMP) is on hold. Should we have any new updates concerning this we will be sure to let you know. If you would like to have a look yourself, there is a 9DoF firmware solution on Invensense which also employs an MSP430 (sorry no link as you will have to log in to gain access to their example), or an open source solution here <https://github.com/joshsh/laboratory/blob/master/mods/i2cdevlib/MPU9150/MPU 9150_9Axis_MotionApps41.h> . In terms of advantages, the processor on the Shimmer3 is roughly three times faster, so that is a big bonus, should you need to do extra processing outside of the DMP. In terms of caveats, I cant think of any, but anyone feel free to chip in. Best regards, Jong Chern From: [email protected] [mailto:[email protected]] On Behalf Of Chris B Sent: 10 January 2014 17:33 To: mike healy; [email protected] Subject: Re: [Shimmer-users] Shimmer3 Repository Hi Have you guys at Shimmer (or anyone else on this list for that matter!) implemented the MPU DSP in any example Shimmer3 applications? I assume we should be able to output quaternions, linear acceleration estimates etc. Are there any coding or hardware caveats we should be aware of? e.g. any conflicts with SD card logging, BT streaming etc We're trying to figure out whether it's worth upgrading from Shimmer2r. thanks Chris Brooks Performance Sport Engineering Laboratory University of Southampton _____ Date: Tue, 19 Nov 2013 10:17:03 +0000 From: [email protected] To: [email protected] CC: [email protected] Subject: Re: [Shimmer-users] Shimmer3 Repository Hi Paloma, This has been on my TODO list for a while, but I just haven't had a chance to clean up the code and get it online. I aim to have BtStream for shimmer3 online by the end of next week, and SdLog a week or two after. Mike On Tue, Nov 19, 2013 at 8:19 AM, Paloma Vaquero <[email protected]> wrote: Hello, Could it be possible to get the source code for the BtStream_v0.1.0_shimmer3 application? For the Shimmer2r there is a folder called BtStream at https://github.com/ShimmerResearch/tinyos-shimmer. Nevertheless, the folder https://github.com/ShimmerResearch/shimmer3 is almost empty. Thanks a lot, Paloma. _______________________________________________ Shimmer-users mailing list [email protected] https://lists.eecs.harvard.edu/mailman/listinfo/shimmer-users _______________________________________________ Shimmer-users mailing list [email protected] https://lists.eecs.harvard.edu/mailman/listinfo/shimmer-users
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