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  • Roger McClurg March 9, 2014 at 10:19am
    I read that the S.port runs at 3.3V. I recently put a multimeter across the pos and neg leads an got 5.26V. Why the discrepancy?
    • Rolf Blomgren > Roger McClurg March 9, 2014 at 1:59pm

      It's the signal thats 3.3V

  • Dae oong, Heo March 9, 2014 at 7:40am

    awesome!!   nice work!

     

    would you explain what teensy 3.1 is  or give me a link ?

     

    thanks

  • Göran Blom March 8, 2014 at 2:27pm

    Hi Peter, I tried this but I cant get any HDOP value in my Taranis.

    Could you attach the working file.

    Thanks in advance/Goran

  • Roger McClurg March 8, 2014 at 7:59am
    I'm interested in connecting an EagleTree GPS to the Teensy3.1, and Sport. I'm also a noob to C++ coding. I've got 40 years in programming on mainframes in a dozen languages, so the learning curve isn't that steep. I was just hoping that Rolf might be able to give me a head-start using the Mavlink to FrSky library. Do you have any GPS code I could start with, or possibly a good place to start?

    Roger
  • Marcel March 7, 2014 at 2:30pm

    Hi Francis,

    this does not compile for me. The compiler complains that there is no ) before a numeric constant. Is there a '<<' missing in between temp and 20?

    Could you maybe post your patched files?

  • Mike Gregory March 7, 2014 at 6:34am

    Rolf

    How are you progressing with the CPPM output.

    I started a thread over at Teensy forum asking about decoding and encoding PPM streams. Paul Stoffregen jumped in and has started a library to do just that. Maybe just what you want to get that part going, worth a look at least He has written a bit about it here http://www.pjrc.com/teensy/td_libs_PulsePosition.html

    The original thread i started is here http://forum.pjrc.com/threads/25265-Arduino-RC-library

    Hope it is of some help to you.

    Mike

    • Rolf Blomgren > Mike Gregory March 7, 2014 at 8:28am

      The PPM encoding is easy... the problem is with using 3 serial ports ( Mavlink, S.Port and S.Bus ) at the same time and not  having timing problems with the PPM data.

      /Rolf

      • Mike Gregory > Rolf Blomgren March 7, 2014 at 11:52am

        have a look at his code i think you will be surprised.

        Quote from him

        PulsePosition is designed for 0.02 µs accuracy (approx 24X better than most Arduino implementations using AVR Timer1) with tolerance for significant interrupt latency caused by other libraries. All output waveforms are generated by hardware timer compare and all input waveforms are read using hardware timer input capture, for extremely precise timing. Pin change interrupts, which add error due to interrupt latency, are never used.

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