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  • hw999's Avatar
    01-04-2018, 07:47 PM
    hw999 replied to a thread uNav AHRS in General Discussion
    Hi Brian I hope I may ask this question - do you plan to finish the work on this library ? I apologize that I can't contribute. The math behind is too much for me.
    112 replies | 4647 view(s)
  • hw999's Avatar
    01-04-2018, 07:44 PM
    Hi nox 771 implemented the latest version tested especially the onError() callback and resetBus(). Works really nice. Is it a big deal to provide information about the I2C adress that was involved in the error...
    610 replies | 269131 view(s)
  • hw999's Avatar
    01-01-2018, 07:15 PM
    Thanks for information. No need to rush things.
    610 replies | 269131 view(s)
  • hw999's Avatar
    01-01-2018, 04:22 PM
    Thanks, 99% is a probability high enough for trying.
    610 replies | 269131 view(s)
  • hw999's Avatar
    01-01-2018, 03:00 PM
    Hi nox771 just a short question : is it correct that each bus has its own callback functions (onTransmitDone, onReqFromDone etc ? I think so but want to be sure.
    610 replies | 269131 view(s)
  • hw999's Avatar
    12-30-2017, 04:12 PM
    hw999 replied to a thread uNav AHRS in General Discussion
    Ooops - looking closer to yaw and mag - rapid changes in orientation lead to inconsistent results. Gave it a try with Filter.setHeadingCovariance(0.001f); without a good result. Next I will have a closer look at...
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-30-2017, 02:51 PM
    hw999 replied to a thread uNav AHRS in General Discussion
    Hi Mike where to find ? Would like to have a look. Calibration is an old topic - in my opinion from a practical standpoint possibly overstated but still important. Is Brian working with offsets for acc in the 9250 ?...
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-30-2017, 02:39 PM
    hw999 replied to a thread uNav AHRS in General Discussion
    @Brian Is the speed input for the filter IAS or TAS ? Might be somewhat accademic but at higher altitudes IAS becomes more and more less - but accel and gyro remain at first glance the same. Might well be that I am...
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-30-2017, 02:29 PM
    hw999 replied to a thread uNav AHRS in General Discussion
    Hi Mike nice coding for the calibration. Any chance you share the software ?
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-30-2017, 12:46 PM
    hw999 replied to a thread uNav AHRS in General Discussion
    I am somewhat surprised by the yaw output compared to mag output. I expect mag output to remain more or less steady over one two hours. Not so with yaw. Expect to reflect at least earth rotation in best case - plus...
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-30-2017, 08:57 AM
    hw999 replied to a thread uNav AHRS in General Discussion
    Added a few lines of code at the end of uNavAHRS::update for computing z-axis acceleration corrected for gravity regardless of board orientation. I use it for improving variometer responsiveness. +++++++++++++++++ ...
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-29-2017, 09:31 PM
    hw999 replied to a thread uNav AHRS in General Discussion
    @Brian looks good so far on T32 and T36:) @mjs513 yaw drift is normal, mag should be stable. Pitch and roll look fine during short tests. Will let it run for a longer time and look at drift
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-29-2017, 08:09 AM
    hw999 replied to a thread uNav AHRS in General Discussion
    @mjs513 tested with a T36 with similar strange results. I admit that I did not calibrate the MPU - maybe this strange behavior has to do with bad calibration. Acceleration values were however in an reasonable range. ...
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-28-2017, 08:02 AM
    hw999 replied to a thread uNav AHRS in General Discussion
    The files I used. Changes in uNavxxxx.ino are behind a comment line //mystuff. No changes in the libs. If you need 9250-master as well let me know. Used it as downloaded
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-28-2017, 07:48 AM
    hw999 replied to a thread uNav AHRS in General Discussion
    Some screenshots - added columns for acc and millis(), print every 100 millis Right after setup : Movements :
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-27-2017, 09:00 PM
    hw999 replied to a thread uNav AHRS in General Discussion
    After compiling the example almost as is (I2C instead of SPI on T32) I just wonder what is going on. Reaction is fast but after some wild movements it takes minutes till the values come in the region of zero. In pitch...
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-27-2017, 05:25 PM
    Hi Brian, of course I noticed the terminal messages. A couple of times telling me "switch". I coded a calibration routine for the 9250 as well - quite dumb with instructions how to position the sensor. I suspected in...
    157 replies | 34642 view(s)
  • hw999's Avatar
    12-26-2017, 10:05 PM
    Hi Brian thanks for the new libraries and all the improvements you made this year. Could you please spend a few words about the calibration process and what your routines expect me to do ? (CalibrateMPU9250)
    157 replies | 34642 view(s)
  • hw999's Avatar
    12-26-2017, 09:18 PM
    hw999 replied to a thread uNav AHRS in General Discussion
    Problem solved - I had Eigen and not Eigen-master in the folder. Thanks. If a library comes as xyz-master - does it usually belong as xyz-master in the libraries folder ? Was not familiar with that
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-26-2017, 08:42 PM
    hw999 replied to a thread uNav AHRS in General Discussion
    I downloaded Eigen from the link you provided. Do you mean there was an Eigen library around before I put the Eigen from bolderflight into the libraries folder ?
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-26-2017, 08:02 PM
    hw999 replied to a thread uNav AHRS in General Discussion
    Hi wanted to compile the example and received the following error message : Arduino: 1.8.5 (Windows 10), TD: 1.40, Board: "Teensy 3.2 / 3.1, Serial, 96 MHz (overclock), Faster, US English" In file included...
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-26-2017, 08:01 PM
    hw999 replied to a thread uNav AHRS in General Discussion
    Hi wanted to compile the example and received the following error message : Arduino: 1.8.5 (Windows 10), TD: 1.40, Board: "Teensy 3.2 / 3.1, Serial, 96 MHz (overclock), Faster, US English" In file included...
    112 replies | 4647 view(s)
  • hw999's Avatar
    12-26-2017, 07:26 PM
    Thanks for all the replies - great. @nox771 - I will give your proposal a try. At the moment one adress between Teensy and FC works fine. The adresses presented from the FC are well defined and not a big number -...
    610 replies | 269131 view(s)
  • hw999's Avatar
    12-26-2017, 04:47 PM
    Hi thanks for reply. No - you misunderstood. The slave should respond to different adresses. Short description of the problem : I have a flight controller which scans for different sensors. Of course I can hook...
    610 replies | 269131 view(s)
  • hw999's Avatar
    12-26-2017, 02:24 PM
    Hi nox771 just a short question : is it possible that an I2C-slave responds to more than one I2C-adress ? Would be handy but I am afraid this is not possible. Right ?
    610 replies | 269131 view(s)
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