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    It would indeed be great to have a breakout board...

    It would indeed be great to have a breakout board with ONLY a uSD cardholder.
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    Would be happy to include that, but which version...

    Would be happy to include that, but which version are you using? in my uSDFS/examples/logger_RawWrite is no #include <USBHost_t36.h>
    Maybe I had it in the beginning, but now it is not there.
    Could...
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    Yes, you can use the Toolchain of Teensyduino....

    Yes, you can use the Toolchain of Teensyduino.
    suggest to run arduino ide in verbose mode. it gives you all the gcc commands it is using. adapt then your own makefile.
    If you work on Windows you...
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    @edsut SAI is somewhat different on T4 compared...

    @edsut
    SAI is somewhat different on T4 compared to T3
    first SAI has 1 dedicated input and output port and 3 shared IO data ports
    second SAI has 1 IN and 1 OUT data port
    So on SAI1 you can...
  5. on my side, no application other than Audio, but...

    on my side, no application other than Audio, but can live with external DAC (I already use mostly external ADC audio and internal ADC for some SLOW sensors, so DAC would be similar reasoning).
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    AFAIK, for Teensyduino, you need the standard...

    AFAIK, for Teensyduino, you need the standard Arduino (installer &zip) the App store is not supported. so get rid if it and start from beginning.
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    a did a search and found Realtek RTL8723BS...

    a did a search and found

    Realtek RTL8723BS SDIO schnittstelle, WIFI + BT Bluetooth + WIFI modul
    https://de.aliexpress.com/item/32325303587.html

    so maybe it is worth to look harder
    obviously,...
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    I'm not sure if this exists but if there where an...

    I'm not sure if this exists but if there where an "SDIO - WIFI/ethernet adapter" then IMO the sdio port would be better than HS USB (4 time lower clock rate does mean less electrical problems)
  9. search forum for VisualTeensy to setup a...

    search forum for VisualTeensy to setup a VisualStudioCode environment
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    What I would do, when confronted with too many...

    What I would do, when confronted with too many talkers and one listener is that the _listener_ tells the talker who can talk (i.e. listener is moderator).
    that is, every talker sends first an ID and...
  11. Have a look into...

    Have a look into
    https://github.com/greiman/SdFat/blob/master/examples/TeensySdioDemo/TeensySdioDemo.ino
    to see how Bill is handling SDIO (i.e. Teensy3.6 internal sdCard) and adapt other examples...
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    I use a 1220 with my boards. Only issue (or...

    I use a 1220 with my boards. Only issue (or advantage?) is that you find batteries not in every tech shop, and air-shipping lithium batteries is nowadays tricky.
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    I would be a fan of a shorter flex cable that...

    I would be a fan of a shorter flex cable that connects to a new extension board, that only features the USB pins and a microSD socket AND the possibility to power the microSD with external 3.3V (say...
  14. Yes, that are the different Teensy models, and...

    Yes, that are the different Teensy models, and yes, the limitation is RAM, but don't be shy to modify code, nothing will break. There is a button to reprogram a crashing Teensy.
    I use on a T3.6 my...
  15. That is the setting for TLC it is defined in...

    That is the setting for TLC
    it is defined in AudioStream.h

    #ifndef AUDIO_BLOCK_SAMPLES
    #if defined(__MK20DX128__) || defined(__MK20DX256__) || defined(__MK64FX512__) || defined(__MK66FX1M0__)...
  16. You tell us, as you have system and new...

    You tell us, as you have system and new information
  17. As I recall the 256 point FFT is indeed 50%...

    As I recall the 256 point FFT is indeed 50% overlap, but you may check in the audio library
    Anyhow it is good to start the example codes, audio GUI, and having a look into the code of different...
  18. As it is designed, the audio library works in...

    As it is designed, the audio library works in blocks of 128 (16-bit) samples so latency is 128/44.1 = 2.9 ms
    if you process data with 50% overlap you end up with four 256pt FFTs per 2.9 ms.

    For...
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    ordered two for 36+3 USD to Europe

    ordered two for 36+3 USD to Europe
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    OK, what happens is, that every time you open a...

    OK,
    what happens is, that every time you open a file, the FS must scan the whole directory to see if it already exists. After a while this will need a lot of time.
    I suggest to create for each hour...
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    What is the FAT of your microSD? It seems that...

    What is the FAT of your microSD?
    It seems that exFAT is opening a little bit faster than FAT32. (sdfs allows exFAT)
    Also use only newly formatted disks for data logging.
    Most of these delays are...
  22. Well, that is your opinion, religion etc., you...

    Well, that is your opinion, religion etc., you may be right so keep it but honestly, I don't care.
  23. First, the audio library expects files with a...

    First,
    the audio library expects files with a sampling rate of 44.1 kHz
    Second,
    what do you mean exactly with "cannot get it to work"?

    It does not compile?
    it does not upload?
    it does not...
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    So what you are saying, is buy a Teensy and...

    So what you are saying, is buy a Teensy and modify it to a NON_TEENSY. (IMO, a Teensy is only a Teensy if it has the Bootloader chip)
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    take the teensyload_cli source code and build...

    take the teensyload_cli source code and build your own SW, CLI or GUI as you wish
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    Just saw, that Paul modified the I2S code in...

    Just saw, that Paul modified the I2S code in audio library (repositioned dma_enable())
    Maybe it is worth to check if such mods will change the behavior.
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    did you try method in...

    did you try method in
    https://forum.pjrc.com/threads/55821-USBHost_t36-USB-Mass-Storage-Driver-Experiments?p=207424&viewfull=1#post207424 ?
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    Are we talking here about 1 I2S stereo channel or...

    Are we talking here about 1 I2S stereo channel or 2 I2S data channels (two audio boards)?
    I assume 1 I2S stereo channel

    What do you mean out of sync by one sample?
    - are channels switched, or is...
  29. Thread: Teensy 4 dead

    by WMXZ
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    It would be interesting to know if HF traveling...

    It would be interesting to know if HF traveling over some connecting lines, due to some non-linear circuitry in the input of Teensy, could generate very high rectified voltage.
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    Yes, that would something interesting, monitoring...

    Yes, that would something interesting, monitoring two or more serial ports (or serial + seremu) with single Arduino instance.
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    yes you could solder a USB wires to the bottom...

    yes you could solder a USB wires to the bottom pads (GND D+ D+) (NO 5V !) and pluck that into your mobile phone, and power your teensy with a charge only cable,
    OR
    you could cut the VUSB-VIN line...
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    When you use SPI library, you tell the code which...

    When you use SPI library, you tell the code which is the CS (IIRC with begin(CS)) and then the SW handles asserting CS for you
    you never do it by yourself
    So:
    (1 or first question): answer "yes"...
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    (1) yes (2) no

    (1) yes
    (2) no
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    Sounds to me that Serial.print is not thread...

    Sounds to me that Serial.print is not thread save.
    (I would be surprised if there are NO global variables in Serial/Stream/Print)
  35. maybe -lstdc++ -nostdlib is the source of...

    maybe

    -lstdc++ -nostdlib
    is the source of your problem?
    why linking to standard c++ library if you then say no std library

    Also, are you by chance using a newer gcc version than Teensyduino?
  36. When I wanted to understand how Arduino compiles...

    When I wanted to understand how Arduino compiles I simply make the IDE verbose, check the output and note the different compile and link options.
    Only after that I modify the make file.

    If you...
  37. In all these T4 serial-usb discussion, one should...

    In all these T4 serial-usb discussion, one should note that in addition to Paul's Sermon speed work, the USB implementation is 'completely' different and most likely not complete in a T4 compared to...
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    If you don't show us the source code, we cannot...

    If you don't show us the source code, we cannot tell.
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    Simply set pin to MISO and it will override all...

    Simply set pin to MISO and it will override all previous usage
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    Have a look at...

    Have a look at https://forum.pjrc.com/threads/35253-Odd-question-2-What-programs-do-you-use-for-schematic-capture-and-board-layout?p=108451&viewfull=1#post108451
    Conclusion, if you know your...
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    Maybe because he is not using a CAD SW?

    Maybe because he is not using a CAD SW?
  42. works for me thanks

    works for me
    thanks
  43. It seems that it searches Arduino only under...

    It seems that it searches Arduino only under C:/program Files etc. but I typically install Arduino in user space (C:-/users/.../...)
    mind to add this search path?
  44. All T4 related (pre release) discussion,...

    All T4 related (pre release) discussion, including code snippets etc, can be found in the monster thread. Best search in that thread.
  45. AS for MCU pin names, table...

    AS for MCU pin names, table https://forum.pjrc.com/threads/54711-Teensy-4-0-First-Beta-Test?p=193716&viewfull=1#post193716 has them in second column , no need of decoding source or schematic
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    yes, I have done it but only Serial is...

    yes,
    I have done it but only Serial is implemented
    Needs a 2nd usb SW stack (see also the huge T4-beta thread where Paul commented on that)

    Edit: I was referring for the USB2 as USB-device and...
  47. would BLE an option? there is SW for BLE on 2nd...

    would BLE an option? there is SW for BLE on 2nd USB port
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    The pads are for USB2, that can and has be used...

    The pads are for USB2, that can and has be used for USBHost SW
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    it may be Arduino definition, but IMHO at the...

    it may be Arduino definition, but IMHO at the same time the implementation stimulates bad programming style: Serial1.write(0x12345678) does not generate compile error but simply prints 0x12 (or 0x78...
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    Any reasoning why you simply truncate the...

    Any reasoning why you simply truncate the parameter to single byte?
    if API says that Serial.write only writes a single byte, the user should to the cast Serial1.write((uint8_t) 0x00); or proper...
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