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  1. Replies
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    Are you absolutely sure that the display code is...

    Are you absolutely sure that the display code is what's taking up the space? You can't really tell from the header files or intermediate .c.o file sizes, you really need to inspect the output of the...
  2. Paul's TimeLib should help: ...

    Paul's TimeLib should help:

    https://github.com/PaulStoffregen/Time
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    The self-hosted web-based PlatformIO Home...

    The self-hosted web-based PlatformIO Home interface provides some good tools for inspecting project code sizes.

    Look under the Inspect section and you can browse around symbols and sections to...
  4. There's some good advice on page 6 of the...

    There's some good advice on page 6 of the Nexperia data sheet you mentioned. That shows the connection to VBUS and has some other notes that may be useful.

    I'd definitely include the protection...
  5. In that case you need to customize the...

    In that case you need to customize the framework-arduinoteensy (which is where cores lives), which I haven't done. There seems to be some good advice to get started here:
    ...
  6. Here's what I do: make the project directory:...

    Here's what I do:

    make the project directory:


    mkdir audiotest

    initialize it:
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    That looks correct. I wasn't sure what was the...

    That looks correct. I wasn't sure what was the best way to organize the list, but this helps me understand what kind of format you are looking for.

    Let me know if I can help you out more!
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    Here's a 4.1 version of the 3.2 text file I...

    Here's a 4.1 version of the 3.2 text file I posted earlier. I just transcribed it directly from the postcard image file I have. I'd love for somebody to review it to make sure I haven't made any...
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    +1 for USB-C. It's time.

    +1 for USB-C. It's time.
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    I made this some time ago, I'm not sure if it...

    I made this some time ago, I'm not sure if it will be useful to you:



    /*
    Teensy 3.2 Pinout

    Top View
    +-----+
    +------------------------| USB...
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    If you need the Teensy to be removable, I had...

    If you need the Teensy to be removable, I had great success with these sockets and wire:

    https://keeb.io/products/peel-a-way-sockets-for-pro-micros

    Alas, they appear to be out of stock there,...
  12. Very interesting, though the photo didn't make...

    Very interesting, though the photo didn't make it...
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    See the drawings here: ...

    See the drawings here:

    https://www.pjrc.com/store/teensy41.html#tech
  14. I've built a couple of keyboards from Teensy 3.2...

    I've built a couple of keyboards from Teensy 3.2 and 3.6, and I've tested that they'd port to the T4.x boards. I rolled my own software for key mapping, scanning, etc. The hard part is the...
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    Those boards look great! I am curious, though,...

    Those boards look great! I am curious, though, why did you decide to use the M.2 daughterboard arrangement rather than just soldering the module on to the host board?
  16. Ta da! https://github.com/blackketter/GT911

    Ta da!

    https://github.com/blackketter/GT911
  17. Wow, you have my sympathies, Keith_M! (Note to...

    Wow, you have my sympathies, Keith_M!

    (Note to self: ALWAYS buy an extra.)
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    That IS nice. Another thing I noticed there...

    That IS nice.

    Another thing I noticed there is that they added a couple of voltage dividers connected to both USB VBUS and VSYS and connected them to a spare analog inputs to add voltmeters to...
  19. Can you post a picture of the tearing on the...

    Can you post a picture of the tearing on the display? Could be a configuration issue...
  20. Same, 4 wire SPI.

    Same, 4 wire SPI.
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    Not sure how the age of the ESP8266 is an issue...

    Not sure how the age of the ESP8266 is an issue for you, but they are quite simple to use and cheap and plentiful. They don't have BLE5, though.

    Both the ESP32 and ESP8266 can be put into low...
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    Looking at the schematic, it's surprising that...

    Looking at the schematic, it's surprising that the MicroMod Reset pin is connected to the Teensy On/Off and not a reset as per the MicroMod spec.
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    Might be better off using a FET and a NO tact...

    Might be better off using a FET and a NO tact switch. It would probably be cheaper too.
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    Or a modified boot loader chip that uses a double...

    Or a modified boot loader chip that uses a double tap or long press on the program button to do a reset.
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    Alas, no, there is no reset pin available on the...

    Alas, no, there is no reset pin available on the Teensy 4.0 or 4.1. It is possible to do a software reset, but that won't help in the case of a firmware fault.
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    My interest in M.2 was as a cheap, higher density...

    My interest in M.2 was as a cheap, higher density connector and not for mPCIe connectivity. For the Vidor it kind of makes sense given the FPGA on board. The applications that make sense to me for...
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    One way to expand the number of pins available...

    One way to expand the number of pins available would be to provide double-density castellations along the edge. The Alorium Evo M51 does this. Every 0.1" spaced through-hole pin is brought out to a...
  28. I'm able to trigger the "2D ready failed" with a...

    I'm able to trigger the "2D ready failed" with a low voltage on the 5v rail. Could that be an issue for you?
  29. NM, found it. (Wasn't searching in the right...

    NM, found it. (Wasn't searching in the right folder...)

    Apparently the 8876 isn't responding. Not sure why that might be intermittent on my side, but if it happens fo you from the start, Keith,...
  30. Interestingly, I'm seeing "2D ready failed" on my...

    Interestingly, I'm seeing "2D ready failed" on my console too. It's happened twice now after running some demos for a long time.

    Not sure where it's coming from, searching the source comes up...
  31. Yup, I"m on 1.53, though I'm using Platformio. ...

    Yup, I"m on 1.53, though I'm using Platformio. Shouldn't matter.

    And the board is v1.0

    Here are images of my board and wiring for a sanity check:

    24034 2403524036

    Hard to trace out the...
  32. Is it possible for you to test with the...

    Is it possible for you to test with the ER-TFT0784.ino example?

    I just verified that with hardware setup the same as is in there, that sketch works.
  33. Same here. I did have one display that came from...

    Same here. I did have one display that came from BuyDisplay that was misconfigured. Couldn't hurt to double-check the jumpers per the datasheet.
  34. Sorry for the silence. 2828DC / Pin 36 doesn't...

    Sorry for the silence. 2828DC / Pin 36 doesn't need to be connected.

    Not sure what the error "2D ready failed" is...

    One thing to double check is that the display is getting enough power. ...
  35. That IS strange. Can you share your...

    That IS strange. Can you share your platformio.ini contents and confirm that the only change you are making to the contents of framework-arduinoteensy is to replace the cores and libraries...
  36. I believe that the version number it's displaying...

    I believe that the version number it's displaying is obtained from

    .platformio/packages/framework-arduinoteensy/.piopm

    which hasn't changed, but you've replaced the code in the cores...
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    There's an early bit of development being done...

    There's an early bit of development being done for RP2040 support on Platform.io. I was able to do a basic blink application using the Arduino framework with it. Might be worth looking at and/or...
  38. I ported over a bit-banged version of...

    I ported over a bit-banged version of configuration code for the SSD2828 and added it to my fork of the Ra8876LiteTeensy library. You can see the files here:
    ...
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    +1 for PlatformIO and VSCode. The combination is...

    +1 for PlatformIO and VSCode. The combination is remarkably easy use, though it does have a slightly steeper learning curve than the Arduino IDE.

    What the PlatformIO team has accomplished is...
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    You'll definitely need those resistors (I2C...

    You'll definitely need those resistors (I2C pull-ups, RESET, REXT), so see if you can get them soldered in somehow.

    And looking at the schematic, it seems you are using 5v+ for some of the...
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    A couple of things to look at: According the...

    A couple of things to look at:

    According the datasheet, you'll need a pull-up resistor on the /RESET pin. Make sure you have that connected before you power it up.
    And you'll need REXT connected...
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    I can't see from the schematic what is connected...

    I can't see from the schematic what is connected to the reset pin (pin 10 on your connector). I wonder if you'd need a pull-up resistor on that pin.
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    Sorry, I don't have any experience laying out...

    Sorry, I don't have any experience laying out this part, but it looks like there might be room right next to the 19/20 pins there!

    It does look like you'll need the diodes, to ensure that there is...
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    Just noticed one more (tiny) thing. There is...

    Just noticed one more (tiny) thing. There is solder mask between the pads on the jumpers. Was this intended? This might make it hard to cut the trace and/or jump the pins.
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    NICE! I see that you have a note that says...

    NICE!

    I see that you have a note that says "RTC Not Yet Implemented".

    That would be my only suggestion left!

    (Could be like the T3.2 with an optional through-hole footprint. Also,...
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    Terrific! I'm sure you're thinking about...

    Terrific!

    I'm sure you're thinking about these, but I noticed:

    - Why not hook up the BATT_VIN/3 pin to one of the free analog input pins?

    - G8 appears to not be connected to anything and...
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    Adafruit has ported the awesome Audio library to...

    Adafruit has ported the awesome Audio library to some of their boards. See: https://learn.adafruit.com/synthesizer-design-tool/audio-library-examples-on-trellis and https://github.com/adafruit/Audio
  48. Terrific! Couple of thoughts/questions: -...

    Terrific! Couple of thoughts/questions:

    - Have you thought about mixing this with Adafruit_GFX hierarchy to provide compatibility with that API? Not sure where the actual primitives would come...
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    Neat! Will you be trying to merge this upstream?

    Neat! Will you be trying to merge this upstream?
  50. No problem! For just a USB keyboard, the...

    No problem!

    For just a USB keyboard, the Teensy LC should be plenty fast and has enough pins for your application.

    If you need other features like a more memory or pins, an SD card slot,...
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