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    Maybe you have Serial.begin(9600) in your...

    Maybe you have Serial.begin(9600) in your program?

    On Teensy, Serial.begin() tries to wait for the Arduino Serial Monitor to connect. It waits up to 2 seconds if your PC begins the USB detection...
  2. Look at the xy() function in the OctoWS2811...

    Look at the xy() function in the OctoWS2811 examples.

    This is the one from the File example (in Arduino, click File > Examples > OctoWS2811 > Fire)



    // A simple xy() function to turn display...
  3. Look for them soon at Envistia ...

    Look for them soon at Envistia

    https://envistiamall.com/collections/pjrc-teensy-microcontrollers
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    I would imagine you'd write the channels mask to...

    I would imagine you'd write the channels mask to the MCTRL CLDOK bits to zero the LDOK bits for all the timers you wish to alter. Then write your new settings to some or all of the 6 timing...
  5. I'm assuming you're editing this line when you...

    I'm assuming you're editing this line when you connect the wires to pins 18 and 19?



    if (!bmp.begin_I2C(&Wire2)){ // hardware I2C mode, can pass in address & alt Wire

    But I can't see...
  6. Looks like this should work. Adafruit's library...

    Looks like this should work. Adafruit's library is designed to work with any I2C port, so you shouldn't need to use "#define Wire Wire2" or edit the library to change "Wire" to "Wire2", as is needed...
  7. I hope you can understand nobody can say...

    I hope you can understand nobody can say specifically what the problem is with an unseen PCB. The best we can do to help you is offer some suggestions of tests to perform and explain what the...
  8. Are these the sensor libraries you're really...

    Are these the sensor libraries you're really using?

    https://github.com/pololu/lsm6-arduino

    https://github.com/pololu/lis3mdl-arduino

    If anyone is going to go to the trouble of editing these...
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    Unfortunately, no. The addresses I have are...

    Unfortunately, no. The addresses I have are (probably) meant to be private.

    I sent an email around the time I wrote msg #4. So far, no reply. But it's only been 2 full business days. Remind me...
  10. Maybe the Linux version of teensy_post_compile...

    Maybe the Linux version of teensy_post_compile should check if the udev rules are installed?

    Until recently, this program was only delivered by the Teensyduino installer which checks if the udev...
  11. Did you install the udev rules? It's required on...

    Did you install the udev rules? It's required on all Linux systems.
  12. This is indeed the default (no threads) behavior...

    This is indeed the default (no threads) behavior for Teensy 2 and 3.

    On Teensy 4, the default has the stack start at the top of ITCM (RAM1) memory, and the heap is located in RAM2 memory.
  13. First, install Teensyduino 1.57. Version 1.56...

    First, install Teensyduino 1.57. Version 1.56 and earlier had MSQ output, which is basically PWM but with extra noise shaping stuff. Versions 1.57 adds PWM output for Teensy 4. But you still might...
  14. Maybe run commands to uninstall and reinstall the...

    Maybe run commands to uninstall and reinstall the teensy board package? Maybe if run with the verbose flag, info about *why* arduino_cli didn't install teensy-discovery might be shown?
  15. This is expected behavior. The 15 sec button...

    This is expected behavior. The 15 sec button press only wipes the flash memory on Teensy 3.5 & 3.6.

    Teensy 4.0 & 4.1 added the "restore program" which is written into the flash after fully erase....
  16. Any chance you can trim the code down to...

    Any chance you can trim the code down to something small enough to share here in a forum message, but still reproduce the crash?
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    I'm not aware of any production flaws or...

    I'm not aware of any production flaws or problems. I can tell you every board was tested with a sine wave diving a 10 ohm resistor in the test fixture, though the test lasts only about 1 second.
    ...
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    SPI protocol lacks multi-master arbitration or...

    SPI protocol lacks multi-master arbitration or other sharing mechanisms. How do you imagine 2 masters could possibly work on any SPI bus?
  19. I sent you an email. We have several with...

    I sent you an email. We have several with cosmetic flaws, mostly just stray solder paste on the through-hole pads. Will be happy to sell you these at the normal price. PJRC doesn't price gouge!
  20. The USB controller operates with DMA accessing...

    The USB controller operates with DMA accessing linked lists of structs in memory to define the properties of all the USB endpoints and manage all the pending data transfers. If you really want to...
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    Maybe look for signs of damage to the wires...

    Maybe look for signs of damage to the wires between the 2 chips. Since pressing the button is at least causing the bootloader chip to reboot the main processor, there's some chance the parts might...
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    I don't know what's causing the problem, but I...

    I don't know what's causing the problem, but I can answer this:



    An ISR, or just ordinary code which calls noInterrupts() and never turns interrupts back on, can interfere with automatic...
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    Sticky: Maybe the IDE only writes changes the...

    Maybe the IDE only writes changes the preferences.txt when you quit?
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    Sticky: The teensy_secure utility looks for your key.pem...

    The teensy_secure utility looks for your key.pem file in 1 specific place. The full path it will search is shown in the Tools > Teensy 4 Security window.

    On Windows, that location comes from...
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    You could just edit the code to change...

    You could just edit the code to change MAX_AUDIO_MEMORY if you *really* wanted to use more.
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    Each audio block gives 2.9ms delay, since the...

    Each audio block gives 2.9ms delay, since the block size is 128 samples.
  27. Looks like it should work.

    Looks like it should work.
  28. 2 blinks means it can't communicate with the...

    2 blinks means it can't communicate with the IMXRT chip, the JTAG port isn't responding.

    Documentation on the blink code is on the page for that chip. Scroll down to "Troubleshooting & Diagnostic...
  29. However, as a blind guess, this might be your...

    However, as a blind guess, this might be your problem:



    Using pinMode() puts the pin into GPIO mode. If done before analogWrite(), as your message seems to say, it has no effect because...
  30. Pins 0 and 1 are not used by USB serial. That's...

    Pins 0 and 1 are not used by USB serial. That's info which applies to boards like Arduino Uno, but not relevant to any Teensy.

    Please show a complete program which can be copied into Arduino and...
  31. Yes, a buffer overflow definitely could "crash"...

    Yes, a buffer overflow definitely could "crash" that way. But better to think "get stuck" rather than "crash".

    For example, you could overwrite variables in RAM used by USB Serial, or hardware...
  32. Does the Program signal have 3.3V when you're not...

    Does the Program signal have 3.3V when you're not pressing the pushbutton?
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    Haha, that's pretty much the exact opposite of...

    Haha, that's pretty much the exact opposite of how I've used the 2 that live on my workbench. I almost never bother to screw them down tight (or at all) and I move them between various carrier...
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    Ok, ran the test again on both boards, this time...

    Ok, ran the test again on both boards, this time using the screw to hold them done.

    Exactly the same result, 1s on pin 22 & 28 and 0s on all other pins.

    29093
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    I tested with the card tilted, exactly as you see...

    I tested with the card tilted, exactly as you see in the photo. I too was lazy about using a screwdriver to secure it. ;)
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    I wired all the ATP pins to GND and ran it here...

    I wired all the ATP pins to GND and ran it here on both MicroMod boards on my workbench.

    29092



    Pins set to input
    Pin 0 state: 0
    Pin 1 state: 0
    Pin 2 state: 0
  37. Does the problem change if you remove the diode...

    Does the problem change if you remove the diode and connect the power with just a wire? Or maybe use a DC voltmeter to check the actual power supply voltage arriving at the VIN pin?

    An issue was...
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    I keep a couple MicroMod boards on my workbench...

    I keep a couple MicroMod boards on my workbench for software testing. I'm not seen any pins failing. But most of the tests I usually run are meant to test the more complex libraries like Audio,...
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    I can't speak for Sparkfun. I can only comment...

    I can't speak for Sparkfun. I can only comment on PJRC's role. And I suppose I could dabble in some guesswork...

    I can tell you every MicroMod Teensy is tested on a test fixture PJRC made for...
  40. You can use extmem_malloc() to dynamically...

    You can use extmem_malloc() to dynamically allocate the PSRAM which isn't already consumed by EXTMEM variables.
  41. The raw speed of internal RAM, either tightly...

    The raw speed of internal RAM, either tightly coupled RAM1 or normal RAM2, isn't going to be the limiting factor for this sort of application. Plenty of other aspects of how your code is written...
  42. Many people probably won't touch IDE 2 until...

    Many people probably won't touch IDE 2 until Arduino calls it officially released.
  43. I've been considering bringing recent Arduino CLI...

    I've been considering bringing recent Arduino CLI into the Teensyduino installer for Arduino 1.8.19, so we can make use of the improved caching features.
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    In Arduino, click Tools > CPU Speed. Changes...

    In Arduino, click Tools > CPU Speed. Changes take effect next time you upload.
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    As a first very simple test to check if slower...

    As a first very simple test to check if slower speed helps, try setting Tools > CPU Speed to only 24 MHz and upload again.
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    Looks like they carry Teensy 4.1, getting it from...

    Looks like they carry Teensy 4.1, getting it from Sparkfun.

    https://electronics.semaf.at/navi.php?a=2488&lang=eng

    Sparkfun should soon have them back in stock. Maybe in a week or two, ask...
  47. I'm catching up to messages I've missed over the...

    I'm catching up to messages I've missed over the last few days. Looks like msg #23 to #30 on this thread about about different case than the msg #1 - #22. Is everything after msg #23 specifically...
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    I believe you should just get a Teensy for audio...

    I believe you should just get a Teensy for audio and USB MIDI, and save the Pico for other less intensive projects.
  49. It really should work. Can you show us photos...

    It really should work.

    Can you show us photos of your wiring? Maybe there an issue we'll be able to see.
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    Sticky: Thanks. Made some edits, updating the page now....

    Thanks. Made some edits, updating the page now.

    Yeah, it's meant to be a quick overview, even though it turned out over 1800 words long! I had meant to write quite a bit more about the 3 audio...
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