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  1. I searched for "serial monitor" and read through...

    I searched for "serial monitor" and read through titles of 61 open issues. The only one I found that seems sort of close is 1508.

    https://github.com/arduino/arduino-ide/issues/1508

    Mostly just...
  2. Arduino has opened issue #1772 regarding this...

    Arduino has opened issue #1772 regarding this problem (Upload menu disabled, not the new thread about lack of serial monitor screen refresh)

    https://github.com/arduino/arduino-ide/issues/1722
    ...
  3. Info here: ...

    Info here:

    https://www.pjrc.com/arduino-ide-2-0-0-teensy-support/

    The install process using Arduino 2.0.x Boards Manager installs a copy of all the same libraries as you would get from the old...
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    The short answer is no, we really don't know when...

    The short answer is no, we really don't know when we'll be able to get Teensy 3.2 back in stock.

    We ordered a large number of Kinetis chips in 2021. Latest info shows NXP will deliver about 15%...
  5. Insight about the possible cause is nice, but...

    Insight about the possible cause is nice, but what's really needed is clearly described steps to reproduce the problem. If I can't reproduce it, odds pretty slim it'll ever get fixed.

    Especially...
  6. Upload definitely could not work at all, not even...

    Upload definitely could not work at all, not even begin, if the K66 chip is damaged.
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    Just a blind guess, since I can't see the rest of...

    Just a blind guess, since I can't see the rest of your program, but perhaps you're using FastLED with the default WS2812 driver which blocks interrupts? It's known to block incoming serial and...
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    Can't see the photo. Google wants a login just...

    Can't see the photo. Google wants a login just to view. Can you show it here in a message? Click the "insert image" button here on the forum to add it.

    Good news is NXP delivered more chips. ...
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    Maybe you're looking at "idle" (CPU not running)...

    Maybe you're looking at "idle" (CPU not running) current rather than "active"?

    Also pay close attention to the description of test conditions. Atmel specifies "active" current with all...
  10. The old PCB has 3 capacitors and 1 resistor. But...

    The old PCB has 3 capacitors and 1 resistor. But it's really 2 pairs of parts in parallel.

    The ones joining the grounds were completely unnecessary.

    The other pair became just a single 0.1uF...
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    The PWM pins can generate waveforms that are an...

    The PWM pins can generate waveforms that are an integer divide of the peripheral clock, which is 150 MHz when Teensy 4.1 runs at 600 MHz.

    So you can get 25 MHz with analogWriteFrequency() and...
  12. Ethernet magjacks have many different pinouts. ...

    Ethernet magjacks have many different pinouts. There is no official or de-facto standard.

    During Teensy 4.1 development, we used UDE RB1-125BAG1A, which has a completely different pinout from...
  13. Which ethernet magjack did you solder to your...

    Which ethernet magjack did you solder to your PCB?

    Design looks correct for Cetus J1B12111CCD or Link-PP LPJ4012AHNL (the 2 possible parts used on the ethernet kit - PJRC has used both of these...
  14. Maybe you're experiencing this bug? ...

    Maybe you're experiencing this bug?

    https://forum.pjrc.com/threads/71370-Teensy4-1-reading-from-Serial-Monitor-of-Arduino-IDE?p=316273&viewfull=1#post316273
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    Again, answers about "how" and "why" over the...

    Again, answers about "how" and "why" over the internet are usually just blind guesswork.

    But generally speaking, the BGA chips can handle a pretty incredible amount of heat if it is uniform across...
  16. To achieve fast write speeds, you will need to...

    To achieve fast write speeds, you will need to collect data into buffers in memory and write in fairly large chunks. 4096 bytes per write should work well with A1 & A2 cards. Larger sizes are...
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    Arduino 2.0.x does not support "portable mode" as...

    Arduino 2.0.x does not support "portable mode" as Arduino 1.8.x did.

    It has been requested here:

    https://github.com/arduino/arduino-ide/issues/122

    I can't speak for Arduino, whether they...
  18. Rather than pour a lot more time into this issue,...

    Rather than pour a lot more time into this issue, which is probably in the Arduino IDE code, I'm going to "solve" it by detecting when "Serial ports" was used to select Teensy. Future versions will...
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    I hope you can understand I'm only (sometimes)...

    I hope you can understand I'm only (sometimes) able to answer "what" on these sorts of over-the-internet hardware troubleshooting but rarely "how" or "why" things went wrong.

    In this case, the...
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    This is very likely caused by damage to the flash...

    This is very likely caused by damage to the flash memory chip, or connection between the flash chip and IMXRT processor.

    On Teensy 4.1 the flash chip is very close to I/O pins 24 and 26. Any...
  21. @Defragster - please start a new thread regarding...

    @Defragster - please start a new thread regarding any issues other than this problem where Arduino 2.0.2's Upload becomes disabled. Maybe edit msg #13 & msg #14 to be just a link to that new thread?...
  22. Ok, I read the Arduino forum thread and played...

    Ok, I read the Arduino forum thread and played with this more.

    It seems the problem depends on whether you select "Serial ports" or "teensy ports".

    29818

    Quick fix, just select the "teensy...
  23. I tried uploading the code from msg #16...

    I tried uploading the code from msg #16 to a Teensy 4.1 on Windows 10 with Arduino 2.0.2 and Teensyduino 1.57.1. I uploaded many times with the serial monitor open, but I could not reproduce any...
  24. Teensy LC lacks the ARM DWT hardware. An #ifdef...

    Teensy LC lacks the ARM DWT hardware. An #ifdef check would be needed to not compile it with Teensy LC.
  25. Can you be more specific about "not detected by...

    Can you be more specific about "not detected by laptop at all". Remember, nobody can see your screen or see which things you are attempting and the results your observing. Please try to be specific...
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    Sticky: Thanks for testing. MacOS can be a challenge...

    Thanks for testing. MacOS can be a challenge sometimes, really helps to get test results like this. :)

    @bicycleguy - if the missing input lines problem returns, please open Terminal and type "ps...
  27. The situation with public APIs is less than...

    The situation with public APIs is less than ideal. Many useful things can only really be accomplished by hard-coding low level stuff.

    But more importantly, the conditions today are far from good...
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    Sticky: Or maybe it can work on Ventura?! Just as I was...

    Or maybe it can work on Ventura?! Just as I was giving up, seems I stumbled on the problem with /usr/bin/open somehow depending on stdin (without any input).

    29813

    Here is a copy of...
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    Sticky: I've spent several hours on the MacOS Ventura...

    I've spent several hours on the MacOS Ventura issue, and I'm sad to say I'm completely stuck.

    Inside teensy_post_compile, when Teensy Loader needs to run, it uses /usr/bin/open with the full path...
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    Sticky: Just to confirm, I was able to reproduce this...

    Just to confirm, I was able to reproduce this problem on MacOS Ventura.

    29810
  31. Generally speaking, public APIs get ported. So...

    Generally speaking, public APIs get ported. So when delayNanoseconds() and digitalToggle() were added relatively recently, they were implemented across all Teensy models, even back to Teensy 2.0.
    ...
  32. Thanks for testing. I really should have done...

    Thanks for testing. I really should have done this weeks ago, but at least now this serial monitor issue is finally fixed. But I still need to work on the new toolchain for MacOS and the lesser...
  33. I left the serial monitor panel open every time I...

    I left the serial monitor panel open every time I clicked Upload (using the small test program) and I was not able to reproduce this problem after a few dozen tries.

    If you give me a complete...
  34. void setup() { pinMode(13, OUTPUT); ...

    void setup() {
    pinMode(13, OUTPUT);
    Serial.begin(9600); // not needed
    Serial.println("Begin");
    }

    void loop() {
    static unsigned int count = 0;
    Serial.print("count = ");
    ...
  35. I tried dozens of uploads with Arduino 2.0.2 and...

    I tried dozens of uploads with Arduino 2.0.2 and a simple program. Could not get any behavior where the Upload button remains grayed out.

    29802

    Clicking either Verify or Upload causes the...
  36. Ok, I believe I have a fix for this problem on...

    Ok, I believe I have a fix for this problem on Windows. If anyone is still watching this thread, please give this teensy-monitor.exe a try. Does it fully solve the problem on your machine?

    On my...
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    First, check File > Prefs. The URL needs to be...

    First, check File > Prefs. The URL needs to be this:

    https://www.pjrc.com/teensy/package_teensy_index.json

    If it has "156", delete the old URL and use this one.

    Then in the Boards Manager,...
  38. Looking at this issue again today. Can confirm,...

    Looking at this issue again today. Can confirm, reproducible with Arduino 2.0.2 on Windows. Can't reproduce it on Linux. Haven't tried MacOS yet.

    29800
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    Those are the digital audio pins.

    Those are the digital audio pins.
  40. Yup, it was a bug in the USB MIDI code affecting...

    Yup, it was a bug in the USB MIDI code affecting transmit when running at 12 Mbit/sec speed.

    I've committed a fix on github.
    ...
  41. That's really a question about the cheap USB...

    That's really a question about the cheap USB isolator product, which PJRC does not make or sell.

    On this Amazon product page the product description says "The product onboard power supply Sunrise...
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    Very unlikely any Teensy 4.1 with the original A...

    Very unlikely any Teensy 4.1 with the original A chip are still being sold. Teensy 4.1 completely ran out of stock from May to July 2021 before the first batch with new B chips. Since then, stock...
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    No, there is no warranty replacement for simply...

    No, there is no warranty replacement for simply having the earlier version of the hardware (which is also well over 1 year old now).

    Have you actually encountered problems from either of those...
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    Are you using the USB host port on Teensy 3.6? ...

    Are you using the USB host port on Teensy 3.6? That's the main feature you don't get with Teensy 3.5. Those pins become just 2 more analog inputs on Teensy 3.5.

    Also check how much of the...
  45. Ah, but perhaps there is a software bug impacting...

    Ah, but perhaps there is a software bug impacting USB MIDI when running at 12 Mbit speed. I've added it to my list of issues to investigate.
  46. Maybe this thread can help? ...

    Maybe this thread can help?

    https://forum.pjrc.com/threads/71472-Customize-the-Teensy-Loader-and-using-the-LPUART-to-load-the-code?p=315644&viewfull=1#post315644

    I specifically tested ADUM3160....
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    Just in the last couple days I've spent way more...

    Just in the last couple days I've spent way more time than I wanted on voltage regulators.

    Even made this test on my workbench, since some of them have less than reliable info...

    29793
  48. In many of its modes, Teensy uses HID protocol...

    In many of its modes, Teensy uses HID protocol rather than Serial. MIDI, Audio, and MTP (all without being Serial) are also possible.

    If you are used to Arduino boards which always uses Serial...
  49. If the LED anode is connected to 3.3V and the...

    If the LED anode is connected to 3.3V and the resistors connected to the cathode, so logic low turns on the LED, you could use pinMode OUTPUT_OPENDRAIN to avoid any conflict.

    But the conflict...
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    Teensy 4.0 is shipping again. Many went out...

    Teensy 4.0 is shipping again. Many went out today, and we even managed to ship some over the weekend.

    Most of them are still in production. We'll get more each week out of production and into...
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