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Just stabbing in the dark here: did you hard-wire the display's CS so that the display itself is disabled, to make sure that it isn't interfering with any attempts to initialize the SD socket ?? What actual pins do you have connected between the T4.0 & the DFrobot_0669 display ?? Do you have...

I don't know about any other ESP32 family devices and/or dev kits, but my ESP32-S3 dev kit board specifically has a CP2102 USB-to-UART bridge IC on it. This device shows up as VID/PID 303a/1001. Don't know if this helps you with your testing in any way, but I thought I'd mention it just in...

@Rolfdegen: I don't have any displays that use the ST7735_t3 library, but I thought I'd take an independent look. Have you downloaded & installed the latest version (after the update mentioned in post #45) ?? Are you sure that you don't have multiple copies of the ST7735_t3 library and/or sure...

May be time to sacrifice an old toaster oven, or to find a hot plate somewhere . . . LOL Mark J Culross KD5RXT

@lolachampcar: I encountered (& reported) a very similar "an error is reported, but the HEX files are generated" behavior, as discussed in <this> thread. Maybe what's described there can provide you some relief . . . Mark J Culross KD5RXT

@jrl_synchro: Go back & reread <post #6> & <post #7>, which both clearly indicate that installing only the IDE is insufficient. It certainly seems like you have not completely followed the instructions given by the webpage that you quoted, nor those in the two posts referenced above. Once you...

After hurling so many insults in so many different directions, you are lucky to get any response at all to your post. But, I'll take pity on your hubristic self & attempt to throw some crumbs your way. This may be regretted later, but I'm doing so while keeping in mind that one of the...

It appears to be some kind of a USB audio adapter. Even better . . . you can use the Teensy (in USB Audio mode) directly for this !! Mark J Culross KD5RXT

(not intended at all as sarcasm): It works !! I've used it to put one of my Teensy-based projects on my home network. The current recommendation is to use the QNEthernet library instead of the NativeEthernet library, as QNEthernet is actively being supported, & the author is very active on...

@dirky: Yes, that should do it. And, if you want to control the volume, I use sgtl5000_1.volume(headphone_volume_value);to vary the headphone volume, & I use sgtl5000_1.lineOutLevel(line_volume_value) to vary the LINE OUT volume. Good luck & have fun !! Mark J Culross KD5RXT P.S. The audio...

@dirky: The headphone jack on the Teensy Audio Shield is for use with headphones only. Not sure exact.y what you mean by "and want to connect it with my Interface", but you should not use the headphone jack to connect with any other kind of external equipment. You should instead make...

I did a forum search for "neural" & found <this> . . . is this possibly what you were looking for ?? Mark J Culross KD5RXT

With my (67-year-old) eyes, I asked my wife to get me the following for Christmas (truth be told, at her request, I selected & purchased it for myself & then told her that I really appreciated her getting it for me . . . that approach works very well for both of us !!) a couple of years ago...

You can find the definitions for the blink codes <here> (scroll down to the "Troubleshooting & Diagnostic Blink Codes" section). Hope that helps . . . Mark J Culross KD5RXT

Running Windows 11 Pro Version 25H2 (OS build 26200.7263) on my main ASUS gaming laptop (12th Gen Intel(R) Core(TM) i7-12700H (2.30 GHz) w/ 64GM RAM). Got same warnings as reported for my HP Small Footprint Workstation, then again, initially reported suspicious by Norton360, but eventually...

Running Windows 11 Pro Version 25H2 (OS build 26200.7263) on my HP Small Footprint workstation (I'll install on my main ASUS gaming laptop tomorrow & report those results separately). Got warnings that are visually the same as reported by @h4yn0nnym0u5e in p#10, then initially reported...

Well, I really hoped that it would not escape you, but, you missed the point. ... ... Correct & no disagreement (that it possibly affects users and developers). ... ... Again, correct, but here's where your understanding falls rather short. Nobody here asked any questions. You started...

@ptorrone: I'll try to be very clear, and concise (I continually write/talk too much !!). 100% of your rant, from the very first OP to this most recent post, and everything in between, most certainly & much more properly, belongs on the Adafruit forum. You are grossly abusing the...

@YasarYY: If you haven't already done so, adding the following to your sketch may be beneficial: If your code (or any included libraries, etc.) encounters an exception (e.g. NULL pointer reference, etc.), it will automatically reboot, and you can get the cause of the reboot by including the...

@clement_vrd: For the "blown aspect of the note", you could try mixing in some white and/or pink noise (you would very likely need to both filter the generated noise & apply an envelope generator to it to get the desired "air sound" in the right place, with the right spectral components). You...

TRANSLATION (by translate.google.com): Hello, Do you have any solutions for making a realistic audio synthesis of a Clarinet with the teensy 4.1 I've already tried codes, but I never got anything conclusive. @clement_vrd: I have created a saved config for a simulated clarinet with the...

Sketch code ?? It is almost impossible to give any kind of meaningful advice without any clues about what code you are executing !! Mark J Culross KD5RXT

@alasor31: Welcome to the world of "you can make this processor do anything you want !!" For your particular application, I would recommend taking a look at using the BOUNCE library, as it will efficiently take care of handling any switch/button bounce for you. This should make managing your...

I've used the <PowerBoost 1000C Charger> from Adafruit successfully in several of my portable projects (hopefully, you will be able to get & use it in the future). This module will take care of boosting the output voltage from the LIPO battery to a clean 5.2VDC that the Teensy will just love...

Absolutely no problem at all. This particular pain has been shared by many, myself included !! Mark J Culross KD5RXT

@Nanoprecision: Comment out the while(!Serial); line in your setup(). Otherwise, with this line uncommented, your sketch will wait (forever) at that point for the Serial Monitor to be connected. Mark J Culross KD5RXT

watching . . .

@amii: Double the number of audio memory blocks allocated to 160 & see if behavior changes. Mark J Culross KD5RXT

@mskl99 (Mike): If you have wired things in the typical fashion, the signals mentioned above (MOSI, pin 11 on the Teensy & SCK, pin 13 on the Teensy) will be the ones most likely to be ringing (ringing: you'll see where the base-level square wave has extra high & low transitions instead of a...

@mskl99 (Mike): Do you have access to an o-scope ?? You might take a look at the clock & data signals between the display & the Teensy to see if you see any signal bounce/ringing. If so, you could try putting a 100-ohm resistor in series with the MOSI & SCK signals, which has been shown to...

With that (BLINK does not turn the LED off) new info, a couple of quick possibilities come to mind: 1) The internal drivers for pin 13 are blown (worst case, which can't be fixed), 2) your Teensy has some kind of conductive short (solder ball, metal shard, un-melted solder paste, etc.) that is...

@Elf: What sketch is running on your Teensy ?? What external hardware do you have connected to the Teensy (is anything external connected to pin 13) ?? Can you load the BLINK sketch & does the LED stay on then ?? Mark J Culross KD5RXT

Is it not the case that the following will always need to be considered when assessing interrupt jitter: 1) fact: a higher priority interrupt (lower interrupt number on the Teensy) will always block a lower priority interrupt, and therefore, delay the execution/completion of the lower priority...

[ EDIT: I see that @PaulStoffregen beat me to the punch !! ] Notice that the Teensy Audio Adapter does not have any capacitors between the SGTL5000 & the headphone jack. Also take note of the statement on the snipped example schematic that you provided "Note: Cap-coupled headphone design shown...

@jsnow: Nice project & great sound. If you'd like to investigate a Karplus-Strong object that allows modulation/tuning, take a look at <this> thread. You can find the updated source (specifically synth_karplusstrong.cpp & synth_karplusstrong.h) in <this> repo by @h4yn0nnym0u5e (he did all...

@DrM: In my TeensyMidiPolySynth (TMPS), I have both a T4.1 running at 600MHz (display / MIDI / debug / USBhost) & a T4.0 running at 816MHz (audio / USBaudio / debug), each mounted on a 7" x 9" PCB, all enclosed in a 3-D printed 10" x 7.5" x 3" box (with a couple of rows of ventilation holes...

A single backslash '\' is being interpreted as an escape sequence. Maybe try using double backslash '\\' as follows (i'm away from my Teensy boards, so this is compiled only, & untested/unverified to work): String B_path[10]; String Str_A = "\\AUDIO\\B_"; String Str_B = "\\"; void setup() {...

@ifrythings: Is the CrashReport repeated/reported every 8-10 seconds, or is it only reported once when a message wake-up is attempted ?? Mark J Culross KD5RXT

https://github.com/TeensyUser/doc/wiki/ECAD

Currently shows in-stock <here> for T3.x.

If I understand your question correctly, you might try opening Device Manager. Make sure to expand the "Ports (COM & LPT)" area, then see what shows up in that list of ports when you plug your Teensy device in. Hope that helps . . . Mark J Culross KD5RXT

@charnjit: Did you follow the required advice in post #18, post #21, & <post #22> regarding changing the PID each & every time that you made a change (to get around Windows' undesirable caching of configurations) ?? Without making that specific change, your updates are probably not getting...

Maybe <this> post provides the answer (not possible due to hardware limitations). And <this> post has additional info that may be useful/applicable. Mark J Culross KD5RXT

The posts by @Cuble1998, all posted very closely together in time, seem very bot-like, but I'd like to be either very right or very wrong with that guess. So, as an attempt to make sure that you are human, please post a reply with an intentionally false statement, enclosed in quotes, and/or...

@Bajanana25: I can't tell what kind of circuitry and/or IC(s) are in front of the HALL signal, & I'm not electronically savvy enough to verify that what's in front of the MCU_OUT_ESP signal provides sufficient protection, but have you guaranteed that any signals connected into the inputs of the...

The Adafruit PowerBoost 1000 includes an active-low enable (EN) signal. That signal probably cannot be driven directly from the Teensy, primarily because it is pulled up to 5VDC, so without very careful usage, that could very easily be fatal to the T4.x. You may be able to design some external...

@colorado_hick: I have made use of the <Adafruit PowerBoost 1000> in several of my projects & find that it does a very good job. I can run these projects on LiPo battery power, or I can run them from external USB power. The PowerBoost 1000 will automatically switch between the two, & pass on...

No apparent danger here, according to <sur.ly> & <hypestat>. The link points to SparkFun's redirector, which leads to a SparkFun hosted <article> announcing that the Teensy is now FCC, ISED, CE, and UKCA compliant. Mark J Culross KD5RXT EDIT: I see that @Angelo & I crossed as we posted the...

@BitSeeker: Thanks for your very clear explanation. We can now understand exactly what your goal is. I don't have any specific experience with register manipulation, but hopefully, between the spreadsheet that @KurtE maintains & the annotated reference manual, you'll be able to accomplish...

Sorry, I forgot to mention that you should make sure to match the signal names, not necessarily the pin numbers. Mark J Culross KD5RXT