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    Looking at the latest Arduino modules, they are...

    Looking at the latest Arduino modules, they are designed so they can be soldered directly to a PCB, for a lower profile.

    https://store.arduino.cc/usa/nano-every

    PJRC, please design similar...
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    A dumb question, doesn't Arduino has a built in...

    A dumb question, doesn't Arduino has a built in mechanism to support third party boards and libraries? What do other hardware vendor do?
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    Thanks Blackketter, this is very useful. I am...

    Thanks Blackketter, this is very useful.

    I am designing my own PCB so I can make the teensy 4.0 area similar to your breakout board.

    PJRC, please consider for next designs ease of low profile...
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    Thanks JBeale. Can you post here the full...

    Thanks JBeale. Can you post here the full example?

    The one in post #5 above does not include the reading (the standard Teensy dual channel example uses a single isr and a single read that return...
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    I am now designing a mainboard for a design that...

    I am now designing a mainboard for a design that include Teensy 4.0 and would appreciate this method of soldering the teensy to a PCB.
    ...
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    Hi JBeale, I need to sample at 100KHZ on both of...

    Hi JBeale, I need to sample at 100KHZ on both of the T4 ADCs in parallel.

    Can this be done with PDB or should I use a timer? Can you post an example?
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    Thanks Paul! Regarding vref, what is the...

    Thanks Paul!

    Regarding vref, what is the best possible vref setup I can use (internal or external)? My signal is single ended and the range 0.5V - 2.5V, coming from a ACS70331EESATR-2P5U3...
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    There are three GND pins among the outer pins....

    There are three GND pins among the outer pins. Any idea which one is closest (in term of noise) to the MCU's analog ground pads?
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    3.3v supply rail is a poor reference for a 12 bit...

    3.3v supply rail is a poor reference for a 12 bit A/D. Hope that there is a better way to provide reference for a 0 - 3.3V analog input range. (In my current application range up to 2.7V would also...
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    Does Teensy 4.0 have an analog ground pin?

    Looking at the pinout diagram, the T4 has a few grounds pins. Is one of them designated as analog ground?

    I need to feed two non differential signals to the two ADCs and would like to know how to...
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    Thanks for doing it Bumbler@.

    Thanks for doing it Bumbler@.
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    Thanks a lot Bumbler, I will take a look. I...

    Thanks a lot Bumbler, I will take a look.

    I have a primitive working version that access the registers directly but it doesn't allow to set thing such as sampling and conversions speeds.
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    On a second thought, I don't need two interrupts,...

    On a second thought, I don't need two interrupts, one for the timer (which starts the ADC) and one for the ADC result. I can do everything in the timer ISR, reading previous value and then triggering...
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    Thanks JBeale, this is very useful! I will look...

    Thanks JBeale, this is very useful! I will look also at the existing ADC.h.

    I can squeeze from T3.2 50k double samplings and shallow processing in the ISR, leaving about 60% CPU time to main but I...
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    Thanks JBeale. That example is of ADC with...

    Thanks JBeale. That example is of ADC with blocking calls, right? Is there an example for a non blocking ADC for T4? For example, something similar to what described here...
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    Thanks JBeale. What do you mean? I can do it...

    Thanks JBeale. What do you mean? I can do it without ADC.h support? How? Accessing the hardware directly? Any other useful library?

    Also, anybody knows the ETA of ADC.h support for T4? I am...
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    What ADC library to use with Teensy 4.0?

    Hi all,

    I am trying to use ADC.h from a Teensy 4.0 Arduino sketch and am getting a build error that the library doesn't support T4.

    Any idea what library to use?

    I want to trigger...
  18. Michael, when you experience the SPI issues, did...

    Michael, when you experience the SPI issues, did you have more than one SPI devices connected to the same MISO/MOSI ?

    In my case there is only one device, the display. I wonder if I even need to...
  19. It seems that the problem with not updating the...

    It seems that the problem with not updating the background is related to comment here

    https://github.com/adafruit/Adafruit-GFX-Library/blob/master/Adafruit_GFX.cpp#L1136

    This is a bad choice in...
  20. I got the 1.8" TFT, followed the connections...

    I got the 1.8" TFT, followed the connections described in the Teensy ST7735_t3 example (I am using Teensy 3.2) and everything works just fine. That's was easy.

    The only problem I encountered so...
  21. I may try the hardware timer to pace the...

    I may try the hardware timer to pace the sampling. Currently its every ~30usec with ~1usec isr time.

    The T4 seems to be superior to the T3.2 and at same size and price so no brainer from my...
  22. Bumbler@, it needs to read both channels...

    Bumbler@, it needs to read both channels continuously, ~10k per channel per sec so it doesn't lose stepper steps. This works on a T3.2 though I am considering using a timer to trigger the samplings...
  23. Is there another supported library to use the...

    Is there another supported library to use the T4's ADCs under the Arduino IDE?
  24. Does this continuous simultaneous ADC sampling look reasonable?

    Hi everybody,

    I am new to teensy and am trying to understand the ADC library. For my application I need to sample two analog channels that represent the currents through a stepper motor coils and...
  25. Thanks Kurte, this is very useful. The LCDs...

    Thanks Kurte, this is very useful.

    The LCDs should arrive in 2-3 weeks so I will sample whatever Teensduino will be available at that time and give it a try.

    I think that the pending issues...
  26. Thanks Michael, this is very useful information. ...

    Thanks Michael, this is very useful information.

    I don't need to run anything else with SPI so I presume that CS is not an issue for my application.

    I just ordered a T4 here and two 1.8"...
  27. Any small LCD screen that works well with Teensy 4?

    I would like to attach a small LCD or OLED screen to a Teensy 4. For example, this 1.8" SPI color screen (monochrome may also be ok).
    ...
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    Can I make the bare-metal ARM solution to work...

    Can I make the bare-metal ARM solution to work with the Arduino IDE? (which is a very easy to install tool chain that works on Linux, Mac and Windows, couldn't find anything that matches it in this...
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    Thanks drg, very useful information. I prefer not...

    Thanks drg, very useful information. I prefer not to deal with the licensing chip as it's not a good fit for my open source projects. I will wait and see if the Arduino Zero will be better in this...
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    Teensy 3.1 based custom design?

    Hi all, I am new here. I used to design my MCU based projects by breadboarding with Arduino Mini Pro board and then making a custom PCB with the project specific IO and an atmega328p with bootloader...
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