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    On the Big Sur issue, please check the System...

    On the Big Sur issue, please check the System Preferences > Security & Privacy settings. First look at "Files and Folders" to check whether you've (perhaps unintentionally) disallowed the software...
  2. It's now on the right hand side of the products...

    It's now on the right hand side of the products page.

    https://www.pjrc.com/store/
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    I'm absolutely not going to drop Macintosh...

    I'm absolutely not going to drop Macintosh support. Anyone who's worried by the talk on this thread can consider can this message to be official word from PJRC. Mac support will continue. No need...
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    I was able to reproduce this problem. It's a bug...

    I was able to reproduce this problem. It's a bug in the new SD.h, where it's a bit too aggressive about undefining the incompatible FILE_READ and FILE_WRITE from SdFat.h. When headers are included...
  5. I looked briefly at your schematic. Nothing I...

    I looked briefly at your schematic. Nothing I can see looks out of the ordinary. For the sake of testing, I would remove the MIC803 chip, even though it should be ok.

    Have you tried any of the...
  6. This sort of desoldering is risky. It certainly...

    This sort of desoldering is risky. It certainly can be done with good tools and skills. However, it is easy to damage the PCB if things don't go perfectly.

    If you're not in a financial position...
  7. A previously programmed Teensy 3.2 should...

    A previously programmed Teensy 3.2 should continue to run its previously programmed code if you remove the MKL02 chip, assuming you don't damage other parts of the Teensy 3.2 during the desoldering...
  8. Nope. The number of USB endpoints limitation is...

    Nope. The number of USB endpoints limitation is due to the hardware in those old 8 bit chips. The hardware hasn't changed.

    But of course newer hardware is available. You can do this with Teensy...
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    Confirmed, those are the NAND flash chips I...

    Confirmed, those are the NAND flash chips I bought. Digikey part number W25N01GVZEIGCT-ND.

    I also have a few samples of W25N02KV. @wwatson - please email me directly and I'll arrange to send you...
  10. Nope, completely wrong assumption. Frank's...

    Nope, completely wrong assumption. Frank's explanation is correct.




    While this is technically true, the MKL02 always drives that pin. It is *not* open collector / drain as we have on Teensy...
  11. We just watched the video. Robin's freaking out!...

    We just watched the video. Robin's freaking out! She's a huge Mandalorian & Star Wars fan.

    I like how everyone has a machine shop in their garage. ;)
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    Which Mac are you using? It is an Intel model or...

    Which Mac are you using? It is an Intel model or the new ARM M1?
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    I'm planning to rewrite the product pages "soon"....

    I'm planning to rewrite the product pages "soon". The Teensy 4.1 pinout card back side will come later, probably late December or early January. Most of the website is a work in progress, but at...
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    Yes. It already is designed to operate this way!...

    Yes. It already is designed to operate this way!

    Just create multiple LittleFS_SPIFlash instances, one for each chip. For example:


    LittleFS_SPIFlash chip1;
    LittleFS_SPIFlash chip2;...
  15. Just to explain a bit further - a special highly...

    Just to explain a bit further - a special highly optimized serial monitor is used when you select Teensy Ports in the Tools > Ports menu. Here is a blog article I wrote last year about that...
  16. In Teensy > Port, select the "Serial port" copy...

    In Teensy > Port, select the "Serial port" copy rather than the "Teensy port" version.

    Then Arduino's original serial monitor will be used. Just don't print too fast - it can't handle sustained...
  17. I've edited the Hardware Serial Ports page. ...

    I've edited the Hardware Serial Ports page.

    https://www.pjrc.com/teensy/td_uart.html

    Previous it said:



    I've added these words.
  18. Please try to trim these to small programs. If...

    Please try to trim these to small programs.

    If possible, please eliminate the dependency on U8x8lib.h, i2c_driver_wire.h and any other libraries not part of a clean Arduino + Teensyduino install. ...
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    Ok, added. It'll be in 1.54-beta6. CSF...

    Ok, added. It'll be in 1.54-beta6.




    CSF is a digital signature format defined by NXP which can be appended to your program. Currently Teensy is configured to ignore it, and that...
  20. Can this problem be reproduced using unmodified...

    Can this problem be reproduced using unmodified USB code on both boards?

    If so, can I talk you into posting 2 small but complete program I can copy into Arduino and upload to the 2 boards? It's...
  21. They're separate and completely independent of...

    They're separate and completely independent of each other.
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    Normally the audio shield should not have any...

    Normally the audio shield should not have any impact on the built in SD socket on Teensy 3.6. None of the signals are shared, only power.
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    I ran it here with the latest beta using Teensy...

    I ran it here with the latest beta using Teensy 3.6 and a Samsung 32 EVO Plus in the built in SD socket. Uploaded 10 times. It printed "success !" every time.
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    Are you using version 1.53? In 1.54 we're...

    Are you using version 1.53?

    In 1.54 we're changing SD and switching to SdFat version 2 (until very recently called SdFat-beta). Might be worthwhile to uninstall SdFat and give the 1.54-beta5 a...
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    Is the known erased blocks bitmap stored in...

    Is the known erased blocks bitmap stored in volatile memory?

    If someone uses this to build a data logging application, do they need to keep continuous power applied from the time of low level...
  26. Wow, really glad to see you used the vsync info! ...

    Wow, really glad to see you used the vsync info! I had long dreamed of doing that with ILI9341_t3, and months ago I even added the functions to read the scan line... but never had the time to...
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    FWIW, I'm planning to dust off the old...

    FWIW, I'm planning to dust off the old SerialFlash library and try to put a File / FS wrapper on top of it, awkward as that may be. The main problem is SerialFlash needs to pre-allocate files to a...
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    Before you put a lot more work in this, I hope...

    Before you put a lot more work in this, I hope you can spend a little time to think about whether you've building something that is generally useful to a large user base, or if you're optimizing the...
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    I'm not planning to work on effect_delay_ext.cpp....

    I'm not planning to work on effect_delay_ext.cpp. Too many other much more important things to do....

    But if I was to work on it, the 2 things I would do are add support for the cheap PSRAM chip...
  30. Turns out pin 35 is the one exception to the pin...

    Turns out pin 35 is the one exception to the pin mux always using ALT2. I've committed a fix on github:
    ...
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    Oh, I forgot, I also had a small FRAM chip on...

    Oh, I forgot, I also had a small FRAM chip on this I2C test board from early this year (January seems like forever ago...)

    22669

    This FRAM chip was on the I2C tests because it is one of the few...
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    I ordered a few Cypress FRAM chips from Digikey. ...

    I ordered a few Cypress FRAM chips from Digikey. Since they're limited to 40 MHz, these can only be supported on SPI. They're a lot more expensive than flash, but should give much higher write...
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    Nope, missed it, and probably a lot of other...

    Nope, missed it, and probably a lot of other details on this long thread. Saved a note to look at #424 later.

    Robin & I are busy all day shipping the Black Friday orders, and it'll probably go...
  34. Maybe try sharing a PDF. The forum limits the...

    Maybe try sharing a PDF. The forum limits the max size of images, which makes this very hard to read.
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    With W25Q128JVSIQ (date code 2028): ...

    With W25Q128JVSIQ (date code 2028):



    /tmp/arduino_modified_sketch_28042/sketch_nov27a.ino Nov 27 2020 07:34:56
    Started QSPI_DISK

    Bytes Used: 12288, Bytes Total:16777216
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    I've added support for Winbond W25Q256 & W25Q512....

    I've added support for Winbond W25Q256 & W25Q512.

    https://github.com/PaulStoffregen/LittleFS/commit/9d94f3b327f31b92504374d13d58de0887f863c2
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    You probably have a copy of SD in...

    You probably have a copy of SD in {Documents}/Arduino/libraries. Anything you put there will override everything else. It's a powerful feature meant to allow you to play with editing library code. ...
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    NXP doesn't tell us how they implemented the PLL,...

    NXP doesn't tell us how they implemented the PLL, but it's a pretty safe bet the phase comparator is a digital circuit like a R-S latch, which drives an analog amplifier / accumulator, which controls...
  39. Does Port Chain "3-2-1-4-3" mean you have...

    Does Port Chain "3-2-1-4-3" mean you have multiple hubs between your PC and Teensy? Maybe try plugging directly into your PC?

    Also, for the sake of testing, please program Teensy with a very...
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    The Black Friday Sale price is now live on the...

    The Black Friday Sale price is now live on the website!

    https://www.pjrc.com/store/teensy40.html
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    Here is a fix for the serial monitor text...

    Here is a fix for the serial monitor text selecting bug, which was added by 1.54-beta4. Turns out I made a silly off-by-1 mistake while fixing the problem where a long line of text would force the...
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    Yes, currently the flash writing & erasing waits...

    Yes, currently the flash writing & erasing waits for the flash chip to be completely finished before returning.

    In the future I would like to change this, so writes are put into a queue and...
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    Yes, use a larger denominator. The hardware...

    Yes, use a larger denominator.

    The hardware supports a 30 bit number. Currently the audio library is loading the number 10000, using only 14 of those 30 bits!
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    I did a quick listening test. Sine waves aren't...

    I did a quick listening test. Sine waves aren't nice for listening.

    On the first test, changing the numerator from 2240 to 6240 while the denominator is 10000, indeed there is a strange noise...
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    I did some tests to check for how fine we can...

    I did some tests to check for how fine we can adjust the frequency. My scope's frequency counter isn't sensitive enough, so I had to connect it to my real frequency counter (BK Precision 1823A) and...
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    NXP lied to us!! You can change the PLL while...

    NXP lied to us!! You can change the PLL while it's running!

    Ok, I tried it just now, using this:



    #include <Audio.h>

    AudioSynthWaveform waveform1; //xy=171,84
    AudioOutputI2S ...
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    Has anyone tried anyway? Does the PLL actually...

    Has anyone tried anyway? Does the PLL actually ignore writes to its registers while it's turned on, or is that just what we're not supposed to do?

    Or can the change turning the PLL off and back...
  48. Oh, I see Arduino's MIDIUSB library has more .h...

    Oh, I see Arduino's MIDIUSB library has more .h files now....

    https://github.com/arduino-libraries/MIDIUSB/tree/master/src

    Still trying to decide how I feel about adding these to Teensy's core...
  49. On Teensy, MIDIUSB.h is just a thin compatibility...

    On Teensy, MIDIUSB.h is just a thin compatibility wrapper which turns Arduino's rather awkward MIDI API into Teensy's usbMIDI (which uses the same API and the MIDI library).

    But we don't have any...
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    AUDIO_SAMPLE_RATE_EXACT is a constant. You need...

    AUDIO_SAMPLE_RATE_EXACT is a constant. You need to recompile to change it.

    On Teensy 4, the I2S ports run from a clock generated by PLL4, also called the Audio PLL. PLL4 runs in a range between...
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