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  1. as I2S uses PIN13 for data input, you mast use...

    as I2S uses PIN13 for data input, you mast use Pin14 as alternate SPI_CLK (Assume you are using T3.x)
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    Hove a look into the src code and you will see it...

    Hove a look into the src code and you will see it Serial.begin(...) does nothing.
    it is not needed, but you can keep it for compatibility.
    BTW, speed is always USB max speed
    Different for HW...
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    deinstall the wrong comport and then reattach T3.6

    deinstall the wrong comport and then reattach T3.6
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    I have a PR pending on adding a function to...

    I have a PR pending on adding a function to DMAChannel.h to allow ISR to be executed at specific interrupt level.
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    But keep in mind, in the end all become machine...

    But keep in mind, in the end all become machine language, even when interpreting p-code.
    So it depend a lot of your skills and mindset, right?
    So I would say, choose the tool that is right for the...
  6. So, you are using https://github.com/yoonghm/MTP,...

    So, you are using https://github.com/yoonghm/MTP, right?
    I cannot comment on this, but typically with SdFAT there is a potential conflict with SD (in Teensyduino) both have the same include file...
  7. Did you try to use one of the examples and what...

    Did you try to use one of the examples and what exactly is your problem.
    Did you read and follow the readme and what did not work?
    Finally, what Library do you wanted to use? (give us a link)....
  8. Thread: Teensy MicroMod

    by WMXZ
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    would be interesting to see if flexibility of...

    would be interesting to see if flexibility of T4.1 (multiple I2S data ports, PSRAM could be mapped to Sparkfun form factor)
    I guess, I stick with T4.1 for some time.

    EDIT: OK I may change my...
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    on https://www.pjrc.com/store/teensy41.html in...

    on https://www.pjrc.com/store/teensy41.html

    in
    "Teensy 4.0 can be programmed using the Arduino IDE with Teensyduino add-on."
    change 4.0 to 4.1
  10. See other thread on MTP responder!

    See other thread on MTP responder!
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    see other thread on MTP responder. It was first...

    see other thread on MTP responder. It was first ported to T3.x.
  12. but where is the algorithm?

    but where is the algorithm?
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    Is that not what one would expect? All data are...

    Is that not what one would expect?
    All data are store in binary form, this is also valid for the mantissa. I guess that 223.98 cannot be expressed in binary form (binary exponent and mantissa).
    I...
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    There are special considerations concerning...

    There are special considerations concerning ground and connections for Xtal. There were discussed here in the forum. A search may find them.
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    Yes, they are in the chip and can be changed by...

    Yes, they are in the chip and can be changed by software. Years ago, FrankB made a sketch that played "FM music" by changing theses capacitors.
  16. Great to hear that. Sure, 'debugging' code is...

    Great to hear that.
    Sure, 'debugging' code is only that. it was done to give some feedback to user. It was not meant to be detection logging. Yous could be very useful indeed, but max be very...
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    old audio shield does NOT work on Teensy 4, when...

    old audio shield does NOT work on Teensy 4, when soldered pin to pin.
    you need Audio board Version D for pin to pin compatibility with teensy 4.x
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    The ferrite chip is indeed indicated as 120 Ohm...

    The ferrite chip is indeed indicated as 120 Ohm impedance (most likely at 100 Mhz as in most cases)
  19. Yes, for the time being, there are #if MDEL

    Yes, for the time being, there are #if MDEL<0 ....#endif around the calls to checkDutyCycle()
    But this is only to see if event-driven recording is working as expected.
    On the bench here it was...
  20. I cleaned up the code to get event driven logger...

    I cleaned up the code to get event driven logger working

    It turned out that the code in #179 could work:
    In order to allow pre-trigger delay the trigger process has to run in parallel.
    However,...
  21. An update I'm working on it There seems nothing...

    An update
    I'm working on it
    There seems nothing wrong with detector in mProcess.h (even if I'm modifying it a little bit)
    BUT I found this

    #include "mProcess.h"
    mProcess...
  22. Thread: audio clock slip

    by WMXZ
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    I'm not sure if this datasheet describes recent...

    I'm not sure if this datasheet describes recent model, but be aware that they had a design flaw such that they lost vacuum when stored over 30 dec C.
    I only can see an advantage if Teensy can run...
  23. I guess, I have to setup the hardware to test...

    I guess, I have to setup the hardware to test further
    can you confirm T3.6 and 2 I2S micros?
  24. It is intended that program continuously checks...

    It is intended that program continuously checks if should close a file or hibernate. This is to allow files that are opened and closed on the second, and to have duty cycles that are on nice numbers....
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    SD library from TD does not support exFAT. For...

    SD library from TD does not support exFAT.
    For ExFAT you need SdFAT-beta from Bill (AFAIK)
    In case you install SdFAT-beta, best you delete the SD library due to conflicting include filers.
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    Did You try the examples provided with the...

    Did You try the examples provided with the libraries?
    Anway chipSelect must be BUILTIN_SDCARD for T3.6 (not SS)
  27. there is nothing magic have a look into...

    there is nothing magic
    have a look into pins_teensy.c in cores (I checked with teensy3)
  28. I still need to spin-up my memories. the snippet...

    I still need to spin-up my memories.
    the snippet detection mode was not really tested widely.

    But, what I would try is two things.
    -make sure that mustClose=0; in config file
    - snipParameters =...
  29. I will have a look into this

    I will have a look into this
  30. Changing the parameters required some design...

    Changing the parameters required some design decision.
    For rebooting from hibernate, parameters need to be read from permanent storage. It was decided from disk.

    This is valid also for start...
  31. The TimeLib warning, is only a gentle reminder to...

    The TimeLib warning, is only a gentle reminder to not to use Time.h if you wanted to include the Arduino TimeLib library. (have a look into TimeLib/Time.h)
    It seems that TimeLib was written by a...
  32. SdFat is a replacement of SD, so you should not...

    SdFat is a replacement of SD, so you should not include both, also it may be necessary to remove SD from library, as it also has a SdFat.h which may results in missing references.
  33. writing your own lib is easy: So take, say I2S...

    writing your own lib is easy:
    So take, say I2S input interface, you will see that there are two parts, one that is configuring the I2S interface, the other is a DMA.
    Now, you have two options:...
  34. At this point you must check if the RPi is...

    At this point you must check if the RPi is providing proper I2S data stream (64 data bits / frame-sync) I cannot tell you how you can get this info apart from using a oscilloscope or logic analyser....
  35. I have not worked with this for a while, but it...

    I have not worked with this for a while, but it seems that the different mods done since beginning generated some incompatibilities.
    In particular, the #defines are corrupting the templates, I was...
  36. any picture of your cut?

    any picture of your cut?
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    here is the link...

    here is the link https://www.pjrc.com/teensy/td_download.html

    Teensy.exe is only the downloader program that indeed says 1.52, but the whole system including toolchain is on td_download page....
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    I appreciate the risk and routing. But if the two...

    I appreciate the risk and routing. But if the two pads were small ovals (or rectangles) twice the size of the actual dots, soldering would be easier, safer?
    Anyhow, I succeeded to solder two short...
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    T3.2 does not have SDIO, you must use SPI

    T3.2 does not have SDIO, you must use SPI
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    I know, the sequence of 5 USB pins on the side...

    I know, the sequence of 5 USB pins on the side are for 2nd USB that one typically uses for USH-Host, but can be programmed as USB device.
    But if you, like me, wanted to use USB not only for Serial...
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    latest TD is 1.53 (on all platforms)

    latest TD is 1.53 (on all platforms)
  42. OK, frank the RFFT really calls a N/2 complex...

    OK, frank
    the RFFT really calls a N/2 complex FFT (generating N/2 frequencies), to go back to real time series you take the N/2 frequencies, after manipulation, and come back to N real numbers.
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    Small correction: Using Arduino IDE, .cpp files...

    Small correction: Using Arduino IDE, .cpp files are compiled separately, but .ino files in directory are concatenated into a single file with "#include Arduino.h" added at top and translated into a...
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    AFAIK, the card present switch is not connected...

    AFAIK,
    the card present switch is not connected to Teensy.
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    I would like to add, these dsp instructions are...

    I would like to add, these dsp instructions are most efficient for 16 bit audio, that is why the audio-library expects 16 bit data.
    32-bit, or float audio is possible with other libraries.
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    One of the problems with the MTP protocol is that...

    One of the problems with the MTP protocol is that it teensy is only a responder. So session management is up to the Host.

    Now in order to close a session on linux you unmount the mtp (AFAIK) and...
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    I see in your code that you include SdFat.h...

    I see in your code that you include SdFat.h
    Please note that SdFat.beta cannot be used in parallel to SD library and SdFat library, but is to be considered a replacement. They all use SdFat.h as...
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    SD library does not support exFAT.

    SD library does not support exFAT.
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    I had never any problems with SdFat-beta. Maybe...

    I had never any problems with SdFat-beta. Maybe your "SdTerminal" (issue on Bill's github) is screwing up the code.
  50. Thread: Bat detector

    by WMXZ
    Replies
    662
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    64,511

    if one still can hear such high frequencies!

    if one still can hear such high frequencies!
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