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  1. No Teensy models past Teensy 2.0 and Teensy++ 2.0...

    No Teensy models past Teensy 2.0 and Teensy++ 2.0 work "out of the box" with hid_listen.

    In the very early days of Teensy, like 2008 to early 2009, development focused on use of command line tools...
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    Maybe it's just the limited resolution of the...

    Maybe it's just the limited resolution of the images, but the PCB looks to have extremely small vias with close to zero annular ring. If that's really the case, even very slight drill misalignment...
  3. You can also get adjustable frequency from the...

    You can also get adjustable frequency from the hardware PWM pins, using analogWriteFrequency() and analogWrite(). Details here:

    https://www.pjrc.com/teensy/td_pulse.html
  4. The easy way is to use the Teensy Audio library...

    The easy way is to use the Teensy Audio library, which is 16 bits, 44.1 kHz sampling. If you only wanted 8 bits, just discard the low 8 of 16 bits.
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    Sticky: Yes, the USB descriptors changed to use IAD. ...

    Yes, the USB descriptors changed to use IAD. TeensySharp will need to be updated.
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    Oh, yeah, that'll sure keep the crystal from...

    Oh, yeah, that'll sure keep the crystal from oscillating. The schematic says you used 12 pF.

    The chip has built in capacitors which are configured for a crystal in the 8-10pF range. So unless...
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    If you short the Program signal to GND (the same...

    If you short the Program signal to GND (the same as holding the button on a Teensy 3.2), does the bootloader chip pull Reset low?
  8. I've edited the tech specs table. Just dropped...

    I've edited the tech specs table. Just dropped the "A", as it doesn't seem like essential info for comparing the specs.
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    No, definitely not. The 3.5mm jack on the audio...

    No, definitely not. The 3.5mm jack on the audio shield is an output. You can't use it as an input, for a mic or any other type of signal. It's strictly an output.

    You might be able to use it...
  10. The range is 0 to 100. A code change to the...

    The range is 0 to 100.

    A code change to the definition of AUDIO_SAMPLE_RATE (making it a float) ends up promoting the entire calculation to float on all boards except Teensy LC.




    Maybe...
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    Sticky: I see the contents of file.htm printing to the...

    I see the contents of file.htm printing to the serial monitor in your screenshot, so I'm pretty sure the SD library is correctly reading that file.

    Which browser are you using? What version? I...
  12. I've updated the Teensy 4.1 schematic for the B...

    I've updated the Teensy 4.1 schematic for the B chip. I believe the schematic is the only place with the "A" chip is actually mentioned, right?

    On Teensy 4.0 we're still shipping boards with the...
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    Sticky: Yeah, I fiddled with the http header and other...

    Yeah, I fiddled with the http header and other stuff when first starting to investigate this. Really should have put that back as it was. But I'll admit, most of my effort was looking at whether we...
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    The relatively old compiler still works quite...

    The relatively old compiler still works quite well. It may be lacking some newer C++ features and may miss a few optimizations in -03 mode, but we know it works and gives very stable results. A...
  15. Might be bugs, might be misunderstanding, might...

    Might be bugs, might be misunderstanding, might be something simple. Who knows?

    If you're stuck and want help, please put your effort into trimming the code down to a reasonably small program...
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    I can comment on this, but it's not going to be...

    I can comment on this, but it's not going to be the answer you want.

    My 2 top priorities are flash encryption and debugging NativeEthernet. Both are large, daunting projects. I'm not even going...
  17. How did you evaluate memmove() speed? And which...

    How did you evaluate memmove() speed? And which Teensy are you using?

    Correctly measuring the timing can be tricky. First you need the source buffer filled with data the compiler can not...
  18. You don't need the audio shield, but you must...

    You don't need the audio shield, but you must have at least 1 hardware input or output, other than USB. The input & output objects have "update responsibility" which causes the entire audio library...
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    Sticky: I ran your program here. I could not get it to...

    I ran your program here. I could not get it to work on either Arduino 1.8.13 + Teensyduino 1.53 or Arduino 1.8.15 + Teensyduino 1.54.

    The main problem is the "while (client.connected()) {" loop. ...
  20. I'm reluctant to speak for Sparkfun. Even if I...

    I'm reluctant to speak for Sparkfun. Even if I did have some insight, the situation can change rapidly.

    But I can speak for PJRC. I can tell you we put a 1st moderately sized batch of Teensy 4.1...
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    I've also considered rewriting the wav file...

    I've also considered rewriting the wav file player. Here's some thoughts....

    Larger buffer memory is the main thing needed to support playing multiple files simultaneously from modern SD cards. ...
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    Sticky: Nope, no idea. Looks like it should work. I'm...

    Nope, no idea. Looks like it should work.

    I'm tempted to try to fill in the rest of the code to run this here, but usually when I do that I rarely end up managing to reproduce the problem. I...
  23. Something in your program is crashing or...

    Something in your program is crashing or accessing illegal addresses, triggering a fault exception. 1.54 has a new fault recovery which automatically reboots after 8 seconds.

    There's also a new...
  24. Quick answers.... I do not believe the...

    Quick answers....



    I do not believe the pulldown resistor really matters.

    I did spend quite a lot of time last night looking at the signals with my oscilloscope. It's easy to see the SD...
  25. Oh, maybe this is the "A" version of the...

    Oh, maybe this is the "A" version of the IMXRT1062 chip. Those have been replaced by a "B" version which fixes a couple errata. We're already using the B chips on Teensy 4.1, and Teensy 4.0 will...
  26. Was it a board I published? I've published many,...

    Was it a board I published? I've published many, but most using Cirrus are usually CS42448.




    Well, guessing you're asking about CS42448, here's a version of that board updated for Teensy 4....
  27. All the info I have is it's still fully active. ...

    All the info I have is it's still fully active. We still have plenty of Teensy 3.2 in stock and more materials are on order.

    Where did you see an EOL notice? Can you give me a link?
  28. I closed many redundant ICS-52000 threads. ...

    I closed many redundant ICS-52000 threads. Leaving this one and that other open.

    Please keep all ICS-52000 on these 2 remaining open threads. Starting more threads only scatters the conversation...
  29. Since this old thread, many other threads have...

    Since this old thread, many other threads have discussed (mostly problematic) experiences with ICS-52000. These are the places to look for more info on ICS-52000.
    ...
  30. I have closed many of the redundant ICS-52000...

    I have closed many of the redundant ICS-52000 threads. This thread and the oldest one on this forum remain open.
    ...
  31. Too many threads about the problematic ICS-52000...

    Too many threads about the problematic ICS-52000 microphone have been opened.

    Please see these 2 open threads.
    ...
  32. Too many threads about the problematic ICS-52000...

    Too many threads about the problematic ICS-52000 microphone have been opened.

    Please see these 2 open threads.
    ...
  33. I did more ICS-52000 testing today with the...

    I did more ICS-52000 testing today with the notwired.co board.

    TL;DR = My gut feeling is ICS-52000 probably only works well at much slower sample rates and clock speeds.

    Details here:
    ...
  34. In a final attempt, I tried removing the 3 chips...

    In a final attempt, I tried removing the 3 chips from the notwired.co board. I replaced 2 of them with just wires.

    25297

    25298

    With this change, I can get the mics to respond. But the...
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    Maybe you're trying to use a copy of Teensyduino...

    Maybe you're trying to use a copy of Teensyduino installer you previously downloaded?

    Go to the Teensyduno download page. You'll see we have 2 downloads for MacOS.
    ...
  36. I made another attempt to test ICS-52000 with the...

    I made another attempt to test ICS-52000 with the notwired.co board with Teensy 3.6.

    In every test I tried, all 4 microphones appear to be transmitting only a worthless static. It seems to never...
  37. Very difficult to say why it's not working for...

    Very difficult to say why it's not working for you. It definitely does work when I test here.

    First, check the simple things. Make sure you're using the latest software, which is version 1.54. ...
  38. First check out the 31 page tutorial, if you...

    First check out the 31 page tutorial, if you haven't already.

    https://www.pjrc.com/store/audio_tutorial_kit.html

    If you have no idea how to use the audio library, this tutorial will walk you...
  39. Nope, no news to report. At this moment, I'm...

    Nope, no news to report.

    At this moment, I'm (again, after 1.54 release) focusing on flash encryption support.
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    Yes. If you don't call SD.begin(10) in your...

    Yes. If you don't call SD.begin(10) in your program (even if you do include SD.h) those SPI pins aren't ever used. Well, except the shield as a pullup resistor on pin 10 which may or may not matter...
  41. Looks like the boards are too close. Parts on...

    Looks like the boards are too close. Parts on the bottom side of Teensy 4.0 will touch the SD socket on the audio shield.
  42. Can you show us photos, so we can see? Sometimes...

    Can you show us photos, so we can see? Sometimes when things go wrong by a misunderstanding, the only way to help is if we can see what was actually done.
  43. You're dealing with so many unknowns, so many...

    You're dealing with so many unknowns, so many ways things can go wrong. So far at least damaged Teensy, maybe due to soldering, maybe from 5V power touching the wrong place, maybe something else. ...
  44. Might be a good to get all this stuff tested on a...

    Might be a good to get all this stuff tested on a solderless breadboard first?
  45. SSD1309 confirmed working here:...

    SSD1309 confirmed working here:
    https://forum.pjrc.com/threads/67725-How-do-i-connect-an-SPI-SSD1309-display-to-a-T4-0?p=283766&viewfull=1#post283766
  46. Found my SSD1309 display. It definitely works...

    Found my SSD1309 display. It definitely works with Teensy 4.0 and u8g2.

    25268

    Here's the code I ran.



    #include <Arduino.h>
    #include <U8g2lib.h>
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    Aren't there already well established protocols...

    Aren't there already well established protocols for streaming over UDP?

    Like RTSP. Or maybe that's just adding too much complexity?
  48. Ah, I didn't see the photo earlier. Agreed,...

    Ah, I didn't see the photo earlier.

    Agreed, looks like normal SPI like all the other displays, except MISO isn't present.

    I might have a similar display laying around in a pile of...
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    I ran File > Examples > Wire > Scanner on a...

    I ran File > Examples > Wire > Scanner on a Teensy 4.0 with Sparkfun BNO080 here. This is the result in the serial monitor.

    25266

    If you're not getting any devices found by the Scanner...
  50. Maybe you could give us a link to the product...

    Maybe you could give us a link to the product page? Or show a photo of the display?

    Please, try to imagine if you were reading this thread and trying to help. Why keep us guessing about what...
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