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  1. Thread: uNav INS

    by bvernham
    Replies
    678
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    132,278

    I have reference for EKF implementation. The...

    I have reference for EKF implementation.

    The question I am asking is about this specific EKF implementation as the code is not really documented with comments and such.

    So anything that would...
  2. Thread: uNav INS

    by bvernham
    Replies
    678
    Views
    132,278

    So the library expects the IMU input in the NED...

    So the library expects the IMU input in the NED convention?

    Also, is the any available paper/presentation/literature concerning the EKF in this library?

    I ask because I am very interest in...
  3. Thread: uNav INS

    by bvernham
    Replies
    678
    Views
    132,278

    Update On Inverted ?

    Any update on why some of the IMU input are inverted within the update statement?

    Thanks

    Bruce
  4. Thread: uNav INS

    by bvernham
    Replies
    678
    Views
    132,278

    Just wondering why the update statement has...

    Just wondering why the update statement has negation and swapping of axis for the accel and the gyro?

    ...
  5. Thread: uNav INS

    by bvernham
    Replies
    678
    Views
    132,278

    My application will never have air speed as it...

    My application will never have air speed as it will be in a vehicle so some implementation like this is required:https://github.com/juangallostra/AltitudeEstimation

    But this would not fuse the GPS.
  6. Thread: uNav INS

    by bvernham
    Replies
    678
    Views
    132,278

    Any plans on using the BME280 in the motion...

    Any plans on using the BME280 in the motion backpack for the INS or AHRS libraries? Typically baro, GPS, and vertical acceleration are fused to determined altitude.

    Thanks

    Bruce
  7. Thread: uNav INS

    by bvernham
    Replies
    678
    Views
    132,278

    Can you provide a link/location of any material...

    Can you provide a link/location of any material which details the derivation of the 7 and 15 state EKF to which you have ported to GitHub?

    Thanks

    Bruce
  8. Thread: uNav INS

    by bvernham
    Replies
    678
    Views
    132,278

    Just found this code and it looks very...

    Just found this code and it looks very interesting. For my application, I need to have a remote antenna. I read in the thread that the PPS needs to be broken out. Besides the PPS signal is there...
  9. Replies
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    1,228

    Never mind! It helps when you read the...

    Never mind! It helps when you read the directions!
  10. Replies
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    1,228

    Teensy 3.6 Recognized By Arduino IDE 1.3.12

    I installed Arduino IDE 1.6.12 and Teensyduino 1.3.1 Beta2.

    I plugged the Teensy 3.6 in.

    The driver installs and it shows up as a in the device library as "Teensyduino RawHID".

    No port is...
  11. Replies
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    181,393

    I have searched the forum and have not seen a...

    I have searched the forum and have not seen a definitive answer if the FlexCAN library works with extended ID (29 bit) which is required for J1939.

    I can see the ID is defined as a unsigned 32 bit...
  12. Replies
    662
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    364,083

    5444 Teensy at 100K with both SCL and SDA...

    5444

    Teensy at 100K with both SCL and SDA
    5445

    Teensy at 400K with both SCL and SDA

    100K will acknowledge but will not display demo sketch.

    Still just spinning my wheels here.
  13. Replies
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    364,083

    /* NKC Electronics serial display - Demo ...

    /*
    NKC Electronics serial display - Demo

    Demonstrates different functions of the Serial LCD module

    The circuit:
    * LCD SCL pin to Arduino SCL pin or Analog 5
    * LCD SDA pin to Arduino...
  14. Replies
    662
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    364,083

    Cranky LCD

    I got home and got a hold of my scope. Please see below.
    5438



    5439

    Let me know if you have any ideas why this may be happening.
  15. Replies
    662
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    364,083

    I have tried it on the Uno because fo the 3.3V vs...

    I have tried it on the Uno because fo the 3.3V vs 5V ratings. I need to check if this is 5V tolerant.

    I also tried lower 200K and 100K but still had the same problem.

    Thanks

    Bruce
  16. Replies
    662
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    364,083

    "When you ran the LCD with the UNO, what did you...

    "When you ran the LCD with the UNO, what did you do for the 3v3 logic and power levels the LCD wants."

    My previous experience are using the 5V version of this LCD with the UNO/Mega/Mega Junior,...
  17. Replies
    662
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    364,083

    I2C Slave LCD Not working

    I have and LCD I2C Slave:

    http://media.nkcelectronics.com/datasheet/NKC2004SD-NSW-BBW-33V33.pdf
  18. Replies
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    364,083

    Once again... both 10K and 5K (10K in parallel)...

    Once again... both 10K and 5K (10K in parallel) were tried with the same result.
  19. Replies
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    364,083

    Pull ups are 10K on the board. I tried adding...

    Pull ups are 10K on the board. I tried adding another 10K (so actually 5K) in parallel and it did not help.
  20. Replies
    662
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    364,083

    I can't seem to get I2C to work correctly

    Arduino 1.0 library:


    /*
    NKC Electronics serial display - Demo

    Demonstrates different functions of the Serial LCD module

    The circuit:
    * LCD SCL pin to Arduino SCL pin or Analog 5
  21. Replies
    662
    Views
    364,083

    I2C LCD to working correctly

    I can't seem to get I2C to work correctly

    I tried the standard "wire.h" but I can not get the i2C LCD to work.

    I have used the Serial LCD Module 20x4 Blue with White Backlight 5v version for...
  22. Replies
    4
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    901

    Can I get a hint? I see ICP1 and ICP3 but ICP3...

    Can I get a hint?

    I see ICP1 and ICP3 but ICP3 is also shared with the SPI buss so I want to specify the library to use ICP1.

    Is this possible?

    Thanks

    Bruce
  23. Replies
    4
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    901

    Which input capture is used?: #define...

    Which input capture is used?:
    #define CAPTURE_USE_TIMER1
    #define CAPTURE_USE_TIMER2
    #define CAPTURE_USE_TIMER3

    1284P has 3 timers.

    Thank

    Bruce
  24. Replies
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    901

    FreqMeasure with 1284P

    I would like to use the FreqMeasure library with the 1284P but the library has not defined that microcontroller.

    Can someone help me modify so I can use that library with the 1284P?

    The...
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