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    To what extent does the accuracy of...

    To what extent does the accuracy of calibrateAccel depend on how well/accurately I position the IMU relative to the true vertical, and for each of the 6 axis positions? This strikes me as the...
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    love your work Brian !

    love your work Brian !
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    ok thanks ...

    ok thanks ...
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    Damn those SPAM postings ...

    In last few days I received about 5 PJRC emails from threads I am subscribed too, but when I click the new posting has already been deleted (by PJRC/Robin) because it was SPAM. I assume many of you...
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    I found the alt sequence for ß (alt-0223) which...

    I found the alt sequence for ß (alt-0223) which is all I need
    großer Erfolg!
    danke
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    totally off topic ... but how did you type those...

    totally off topic ... but how did you type those special German characters, are they just keystrokes or a special keyboard?
    tks
  7. ahah pedvide/ADC ... if you don't get any...

    ahah pedvide/ADC ... if you don't get any reponses here , try posting your question to this thread
  8. sorry to hijack this question ... but where does...

    sorry to hijack this question ... but where does analogSyncReadDifferential() function originate, and where is it documented?
    TAI
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    thanks KurtE I found the relevant stuff, near...

    thanks KurtE I found the relevant stuff, near line # 3030 in kinetis.h (huge file!)

    so now I know ... it's a PJRC-wide convention :)
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    @christoph I have a simple question on bit naming...

    @christoph I have a simple question on bit naming convention. This topic is detailed in the K66 Freescale reference manual section 42.3 but if I search (the manual) for any of the bit terms you use...
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    +1 I see the specs for E50-TTL-500 state current...

    +1
    I see the specs for E50-TTL-500 state current draw of 400mA and recommends a 1A power supply.
    Are your buck converters able to deliver this?
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    ah I see. In my application I'm only reading...

    ah I see. In my application I'm only reading around 0 - 1.2 g so 2g range is obvious choice. So sadly this idea has no advantage, but I see how it works for you.
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    That caught my eye ... how do you plan to get...

    That caught my eye ... how do you plan to get that "extended precision"? thanks
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    how to print a long double ... to 33 decimals

    how can I output a long double to many digits. For example my sketch below uses dtostrf, but the output is only accurate to about 10 digits, like this:

    ------ ------- -------
    D2R:
    _input:...
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    The attached extract from Invensense product...

    The attached extract from Invensense product specification document (p38) shows the Accel/Gyro axes are a different orientation to the Compass/Magnetometer. In Winer's code the X & Y axes of the...
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    that's a fuse, rated at 500mA

    that's a fuse, rated at 500mA
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    got all that, great stuff no more 'double...

    got all that, great stuff
    no more 'double trouble'
    thanks all
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    Thanks Michael. I've got that working in part...

    Thanks Michael. I've got that working in part now, but following still gives inaccurate values.
    How should I do this?


    const long double D2R = DEG_TO_RAD;
    const long double angle = -66.75828;...
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    double precision maths queries ...

    I'm developing a teensy sketch and MATLAB script in parallel, but my limited experience with high precision/high accuacy maths has led me following differences in calculated &/or reported values.
    ...
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    Hey /dev, welcome to teensy world! Thanks for...

    Hey /dev, welcome to teensy world! Thanks for those clarifications on NeoGPS, it's great news. So now I have good reason to give it a whurl - - soon.

    I'll post a new thread then, so as not to...
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    I highly recommend NeoGPS...

    I highly recommend NeoGPS by /Dev. It is by far the best (efficient, reliable and minimalist) GPS library I've used.

    It's especially efficient when using GPS interrupts to drive the sketch (at 5...
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    Very interesting. From everything I read it seems...

    Very interesting. From everything I read it seems the Extended Kalman Filter is superior to AHRS in all aspects, except it is more demending on processing power. If I've understood that right, and if...
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    ah OK, and where will teensyduino fit in that...

    ah OK, and where will teensyduino fit in that evolution (after 1.36)?
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    can I ask .. I know what ARM is about, but what...

    can I ask .. I know what ARM is about, but what is the meaning or importance of the "ARM Toolchain Update" ?
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    randomvibe assuming the video EVL posted in that...

    randomvibe assuming the video EVL posted in that thread is yours? it's a hoot ... haunted music and a suggestive black gloved finger prod the monster to move ... vewy vewy spoooooky :)

    not to...
  26. Here are example initialisation commands for...

    Here are example initialisation commands for three I2C buses on T3.5:


    #include <i2c_t3.h>

    void setup(){

    Wire.begin (I2C_MASTER,0x00,I2C_PINS_18_19,I2C_PULLUP_EXT,400000); // device 1 on...
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    ah yes, success with your latest port. Excellent,...

    ah yes, success with your latest port. Excellent, many thanks.

    Were there many steps to port Eigen library 3.3.2 for teensy, or was it as simple as dropping Eigen folder down to a level?

    I...
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    Brian I'm trying to install Eigen313.zip and...

    Brian

    I'm trying to install Eigen313.zip and the sketch from randomvibe's post#2 in Due libraries thread, except I put it under ARDUINO/SKETCHES/libraries as you have.

    But I get the following...
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    It's not a big deal, maybe consider it when in...

    It's not a big deal, maybe consider it when in next major update. The advantage of 11/12/14 is it frees up the LED_BUILTIN on pin 13.
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    Will your library recognise the teensy SPI libs...

    Will your library recognise the teensy SPI libs alternate pin commands, like SPI.setSCK(14) ?
  31. Thread: spi ports

    by ninja2
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    good point tonton... ariesboy - have a read...

    good point tonton...

    ariesboy - have a read of the documentation for teensy SPI library, especially the section on alternate pins.
  32. Thread: spi ports

    by ninja2
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    Actually the SPI ports are listed on the T3.6...

    Actually the SPI ports are listed on the T3.6 cards
    For example: Pins 10,11,12,13 are labelled in green as CS0,MOSI0,MISO0,SCK0 for SPI

    See if you can find SPI buses 1 and 2 on the card
    Here's...
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    I did spot that vancegroup variant during my...

    I did spot that vancegroup variant during my searches, but it's getting quite stale (last update 4 years ago).

    Neverthless I gave it a try, but didn't get very far... I couldn't follow the...
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    How to install/use Eigen template library

    Looking for some expert guidance on how to install the Eigen tempate library. I've reads lots of related threads and tried a couple of dead ends ... no luck yet.

    I saw this discussion in...
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    Advanced Search warning messages

    When I click on Advanced Search I get a few warnings, as show in attached snippet.
    I'm using latest Firefox browser
    9606
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    Great work Brian - I have tried two alternate...

    Great work Brian - I have tried two alternate MOSI_PIN_XX configs so far and they work just fine now.

    A minor question, when using the default SPI bus and the simpler syntax do you wire pins...
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    Re: Kalman Filtering book by Dan Simon, I've...

    Re: Kalman Filtering book by Dan Simon, I've attached a brief (8 page) overview also by Dan Simon. It includes some Matlab and C code examples.

    9603
  38. Thread: Teensy Qt

    by ninja2
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    Been using TyQt GUI for a couple of months now,...

    Been using TyQt GUI for a couple of months now, and it's becoming routine. But only the GUI and mainly for the ability to do soft resets, and the superior upload mechanism.

    I haven't felt a need...
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    great thanks ... I'll have a read

    great thanks ... I'll have a read
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    USB Host vs Device power on T3.6

    I need to be sure about USB Host vs Device power choice works on T3.6

    After looking at the schematic and K66 datasheet I've figured out choosing Device connection D would input 5V power from the...
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    sorry, I mistook "the main \libraries directory...

    sorry, I mistook "the main \libraries directory of the IDE" in oric_dan's post to mean the libraries directory under Sketches.

    So no paranoia developing, all sorted :)

    Can you answer my other...
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    OK I believe I've got it now. And the corollary...

    OK I believe I've got it now. And the corollary os this is the *ONLY* way to use the SPI interface and SdFat_beta (i.e. USE_SDIO = 0) is to attach another SD socket and wire it to one of the teensy's...
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    thanks for your suggestions oric_dan, but per my...

    thanks for your suggestions oric_dan, but per my last three posts I no longer have the issue around 'BUILTIN_SDCARD was not declared in this scope' when including SD.h library


    Are you sure that...
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    There's no other SdFat version. I have always...

    There's no other SdFat version. I have always been trying to use Bill Greiman's SdFat-beta library (per your link) throughout this discussion. And I reloaded it again recently, just in case.


    Yes...
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    yes that's what I did and Examples >SD>cardinfo...

    yes that's what I did and Examples >SD>cardinfo now works fine (i.e using SD.h is good now)

    For my future reference - when the IDE pop-up offers library updates and the Library Manager lists "SD"...
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    Well finally a little progress. I develop my...

    Well finally a little progress. I develop my sketches on 2 PCs, so I revisited the SD cardinfo example on my other PC and got "Multiple libraries were found" error message:

    CardInfo:36: error:...
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    Just saw some odd behaviour in the IDE Library...

    Just saw some odd behaviour in the IDE Library Manager for
    "SD Built-In by Arduino, Sparkfun Version 1.0.8 INSTALLED"
    choosing 1.0.9 from pull-down and Update results in "Version 1.1.0...
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    AFAIK yes It's there .... but commented out...

    AFAIK yes


    It's there .... but commented out in lieu of "SdFatSdioEX sd" as suggested by bill (code is in my post #32). EDIT: also tried "SdFatSdio sd;" - no luck

    So I just unprgraded to IDE...
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    I am using that SFat beta already, that's not the...

    I am using that SFat beta already, that's not the issue
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    thanks for the detailed explanation drmartin,...

    thanks for the detailed explanation drmartin, helps a lot.

    So the teensy hardware is very different to other SD cards used on arduinos, but what about SdFat?

    Perhaps if I put my question...
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