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  1. The easiest way to check if the MKL02 chip is...

    The easiest way to check if the MKL02 chip is programmed is looking at the voltage on the Program signal (pushbutton). If the code is present, you should see 3.3V because the code turns on the...
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    Also know nothing about Chrono.h and...

    Also know nothing about Chrono.h and LightChrono.h. :(
  3. The normal Audio library can't run on Teensy LC....

    The normal Audio library can't run on Teensy LC.

    But this port of Arduino's much simpler library (which only plays a single WAV file) can.

    https://github.com/PaulStoffregen/AudioZero
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    When I changed the startup for Teensy 3.6, I...

    When I changed the startup for Teensy 3.6, I built a DC-DC converter board with extra slow startup. I tested on all the current 32 bit Teensy boards. Starting the RTC oscillator early on Teensy 3.5...
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    You can't get all 512K with malloc, because...

    You can't get all 512K with malloc, because malloc uses some of the memory to manage a list of allocations.

    Any static or global variables with DMAMEM also go into OCRAM, reducing the amount of...
  6. Wow, that's really amazing it can still partially...

    Wow, that's really amazing it can still partially work.




    Usually touching 5V power to the 3.3V power pin completely destroys a Teensy. You got really lucky.
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    I'm planning to work on Adafruit GFX next week. ...

    I'm planning to work on Adafruit GFX next week. Also going to revert (or mostly revert) the SD lib contribution that broke too much stuff.





    Definitely start from T4's usb.c, since the 2nd...
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    Also on my long list of stuff to eventually do is...

    Also on my long list of stuff to eventually do is a library to implement USB device on Teensy 3.6's 2nd USB port. If running both ports on T4 in device mode works, would make sense for that library...
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    Oh, now I see. Yeah, I decided not to show those...

    Oh, now I see. Yeah, I decided not to show those on the card, mainly because we don't have BCLK3 and LRCLK3.
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    Which 2 pins? Pins 32 and 33 are shown with...

    Which 2 pins?

    Pins 32 and 33 are shown with "OUT1B and MCLK2" with yellow background.




    I believe that was the (weird) order of the early 1052 boards. Looks like msg #3 hasn't been updated...
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    Yes. The FTM and TPM timers create the PWM...

    Yes. The FTM and TPM timers create the PWM signals, so only the pins shows as having PWM are connect to the channels of those timers.




    You're asking for an opinion of what "makes sense", but...
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    I've added the card image to msg #3...

    I've added the card image to msg #3.




    Yup. Also takes time to get it into the anti-static bag, and the get groups of 25 of those into the larger bags, and go through a process we use to...
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    The red boxes are a really interesting idea. But...

    The red boxes are a really interesting idea. But the card really needs to go into printing, at least for the first batch... so I'm really not looking to make much change to the formatting right now....
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    I tried a couple ways to use arrows, but with the...

    I tried a couple ways to use arrows, but with the pads arranged as they are, it seemed more confusing than helpful.




    From 24 to 32:

    NVCC_PLL
    VCC_CPU (0.9 to 1.3)
    VDD_SNVS_IN
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    Here a (hopefully) final draft for the pinout...

    Here a (hopefully) final draft for the pinout cards.

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    I had intended to send this out for printing Tuesday, so now a couple days behind.

    Especially if you have a pinout spreadsheet, or...
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    With malloc you have no way to be sure where in...

    With malloc you have no way to be sure where in the address space you'll get the memory allocated.

    It does grow upward, starting right after all the allocated variables. So if you static memory...
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    Perhaps the Teensy 3.6 has been damaged in some...

    Perhaps the Teensy 3.6 has been damaged in some way where one or more of the pins (BGA balls) is just barely touching the board? At least a couple other people have reported such a problem, where a...
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    Only Teensy 3.6 has USB host capability. The...

    Only Teensy 3.6 has USB host capability. The upcoming Teensy 4.0 will also have USB host. But Teensy 3.2 does not. You need at least Teensy 3.6 to connect USB devices, like a USB memory stick.
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    Glad you got it all working in the end. Any...

    Glad you got it all working in the end.

    Any advise to share, for beginners seeking to build a similar MIDI controller who might later find this thread by search?
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    Hope you'll be able to share more info and maybe...

    Hope you'll be able to share more info and maybe even a demo video when it's built?
  21. As of Teensyduino 1.46, the Teensy Loader does...

    As of Teensyduino 1.46, the Teensy Loader does not actually set the RTC. However, we are working on having it do this for Teensy 4.0, and perhaps in some future version we may bring that feature to...
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    You shouldn't need to get anything special from...

    You shouldn't need to get anything special from github. In Arduino, with Teensyduino installed and Teensy selected Tools > Boards, simply click File > Examples > ILI9341_t3 > graphicstest. That's...
  23. Small wire, like #30 "wire wrap" works pretty...

    Small wire, like #30 "wire wrap" works pretty well. But you need to make sure the wires have a little extra length and be careful with handling, so you don't pull or stress the wire.

    Since almost...
  24. I'm still confused. Is Raspberry Pi "the...

    I'm still confused. Is Raspberry Pi "the computer", so we're talking about just 2 things (Teensy and Raspberry Pi) connected by a single USB cable?

    Or is "the computer" something like a regular...
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    The URLs are case sensitive. It's not working...

    The URLs are case sensitive. It's not working because you changed 2 uppercase letters to lowercase. It's "TeensyduinoInstall", not "teensyduinoinstall". Usually it's best to right-click the...
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    FreqCount is designed to be fairly easy to use. ...

    FreqCount is designed to be fairly easy to use. Sounds like you don't want to hear our advice to give it a try, that you feel you must learn the low level timers even when an easy to use library...
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    You could connect a wire from pin 3 (or whatever...

    You could connect a wire from pin 3 (or whatever pin creates the signal) to pin 13, and use the FreqCount library to count the number of actual cycles.
  28. You should probably also keep in mind this...

    You should probably also keep in mind this behavior is expected if you ever load "bad" code. We make every Teensy with a pushbutton dedicated to entering programming mode, because your code running...
  29. Yes, or well, sort of... Ultimately this...

    Yes, or well, sort of...

    Ultimately this depends on many details of how the chip is designed, and how it's fabricated, which are usually a closely guarded trade secret. But for a general...
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    Are you using the latest Teensyduino? Version...

    Are you using the latest Teensyduino? Version 1.46 has a fix for a startup issue many people experienced when using external power supplies with Teensy 3.6. Click Help > About (or Arduino > About...
  31. Did you press the pushbutton, or otherwise pulse...

    Did you press the pushbutton, or otherwise pulse the Program signal low?

    On a brand new board, no USB activity is the normal condition, until you give the bootloader chip a low pulse on the...
  32. Unless you're doing something very special to put...

    Unless you're doing something very special to put the processor into a low power mode, it's very unlikely to be power consumption from the CPU. The FFT code doesn't consume substantially more power...
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    Very likely a mistake was made somewhere. Maybe...

    Very likely a mistake was made somewhere. Maybe a physical wiring problem? Maybe on the software side? Nobody can even begin to guess when you don't show us the code and hardware (photos) you're...
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    You're right. I ran Windows Update. It...

    You're right. I ran Windows Update. It installed KB4503327. Now I'm at 557. (you can see Windows isn't the OS I use on a daily basis....)

    It's still able to detect Teensy 3.2 at COM4.

    As an...
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    I tried it just now on Windows 10 rev 1809, with...

    I tried it just now on Windows 10 rev 1809, with Teensy 3.2 as USB Serial. Looks like Windows see it perfectly fine at COM4.

    Here's a screenshot with Ardiuno's Ports menu, Windows Device Manager,...
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    Sounds good. Curious to hear how it goes,...

    Sounds good. Curious to hear how it goes, especially if you can share pictures?
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    I know your goal is MIDI, but as an intermediate...

    I know your goal is MIDI, but as an intermediate stepping stone to success, you should really run something much simpler and use the Arduino Serial Monitor.

    For example, try running something like...
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    Yes. But at this moment, I'm focusing on the...

    Yes. But at this moment, I'm focusing on the pinout cards and some other essential documentation stuff.

    My plan is to finalize the cards and send them out for printing next Tuesday. Then I'll be...
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    Start with a Teensy board. Or start with an...

    Start with a Teensy board. Or start with an Arduino board. But get an already-working board and learn how to use it. Use solderless breadoards or other "easy" construction techniques. Learn how...
  40. This is the syntax used for interrupts on AVR. ...

    This is the syntax used for interrupts on AVR. But Teensy 3.2 is an ARM processor. This is the wrong way for ARM chips.
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    Here's a first draft for the back side. Didn't...

    Here's a first draft for the back side. Didn't get the colors into this one yet, so a little more imagination required for this early draft....

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    I'm still not sure if IN# and OUT# are a good...

    I'm still not sure if IN# and OUT# are a good idea. But I'm trying to avoid TX# and RX# since we use those same names for the serial ports. Several times on this forum and in emails, people have...
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    If you can't afford $29 for a Teensy 3.6 board,...

    If you can't afford $29 for a Teensy 3.6 board, how will you pay for a 4 or 6 layer PCB to be fabricated? (a cheap 2 layer board is not good enough for this sort of design) Where will you buy the...
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    Have you purchased and actually used even 1 real...

    Have you purchased and actually used even 1 real Teensy 3.6 board?

    Attempting to design your own PCB without even using a real Teensy 3.6 first would be crazy!



    Whoever created the one on...
  45. At what price? What if it cost $40?

    At what price? What if it cost $40?
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    Have you actually seen it do this? It certainly...

    Have you actually seen it do this? It certainly shouldn't. The blinking mode is only supposed to happen when there's no USB at all, specifically a charge-only cable or with external 5V power on VIN...
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    Here's another draft with text added about the...

    Here's another draft with text added about the red LED.

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    For everyone who's used the betas, does this description make sense? Space is limited on the card, need to choose words...
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    I struggled for quite a while about how to name...

    I struggled for quite a while about how to name the I2S signals, or whether to even include the audio stuff on the card. I want to avoid printing "I2S", since we've seen over and over that people...
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    Here is a first draft for the front side of the...

    Here is a first draft for the front side of the pinout card.

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    So far I haven't been able to find a way to squeeze in CS1 and MISO1 on pins 0 & 1. Looks like there's also no way to cram...
  50. Inside the Arduino folder, look for platform.txt...

    Inside the Arduino folder, look for platform.txt and boards.txt in hardware/teensy/avr.

    This error means you somehow got one of those files installed, but not the other. How that could happen is...
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