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  1. Replies
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    Try setting the interrupt priority to a lower...

    Try setting the interrupt priority to a lower number, using NVIC_SET_PRIORITY
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    It would be interesting to x-ray the bad boards...

    It would be interesting to x-ray the bad boards to see if it is a BGA issue or socket issue.

    I use the MM in a couple of projects. I haven't tested every pin, but I did find they can be finnicky...
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    Which Teensy? Are you making a pcb?

    Which Teensy?
    Are you making a pcb?
  4. Check out visualteensy. ...

    Check out visualteensy.

    https://github.com/luni64/VisualTeensy
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    I also found this board, might be less effort to...

    I also found this board, might be less effort to use instead of the chips.

    https://www.waveshare.com/w/upload/0/08/LAN8720-ETH-Board-Schematic.pdf
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    I was mashing together a few different Sparkfun...

    I was mashing together a few different Sparkfun boards, there was a POE board that had all that extra stuff. It should have all your notes in there. I checked the Arduino to MM pins, they look good....
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    Thanks for the groundwork on this Paul. I started...

    Thanks for the groundwork on this Paul. I started an Eagle schematic, pdf attached.

    I'm not quite done, need to find an LDO and finish up the voltage regulation section. Maybe bring out some pins...
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    Thanks Paul, I grabbed a handful as well. I'll...

    Thanks Paul, I grabbed a handful as well. I'll update here if I catch a break and start on a MicroMod ethernet test board.
  9. The battery taps are for charging, so they keep...

    The battery taps are for charging, so they keep the cells balanced, as you mentioned.

    Drawing off the taps in different amounts will unbalance them. Will the charger be ok with this?

    Not sure...
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    You need 5 or 4 pins connected MOSI SCK CS...

    You need 5 or 4 pins connected
    MOSI
    SCK
    CS
    D/C
    Reset (can be optional, depends on library)

    The SPI hardware will dictate MOSI & SCK. You pick the rest of the pins from your available GPIO and...
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    Are the T4.1-Lockable available anywhere? Any way...

    Are the T4.1-Lockable available anywhere? Any way to convert a non-lockable to lockable?
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    Thanks Paul & vjmuzik, perhaps @shawn can chime...

    Thanks Paul & vjmuzik, perhaps @shawn can chime in on QNEthernet's effort needed, or someone else with the chops to add it. I can whip up a MicroMod board.
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    @PaulStoffregen I was looking at this, but...

    @PaulStoffregen I was looking at this, but getting PHYs these days is 39 weeks away. So I've got time to figure out the MicroMod board, but what else is needed to get this to work?

    When you say...
  14. The phy has auto-MDIX, which will auto detect a...

    The phy has auto-MDIX, which will auto detect a crossover cable and swap the signals.

    When you plug it in backwards, it will auto correct, but LED won’t work.
  15. Not sure if the network has a router, but I was...

    Not sure if the network has a router, but I was having issue with my network and found that a dumber network router seemed to work better, back when I started using NativeEthernet. I have a Unifi...
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    I have interest in this as well, but haven't had...

    I have interest in this as well, but haven't had the time to spend on it, but slowly gathering up components to build it.

    From what I understand, you will need a grand master clock, which can be...
  17. Did you put the diode in the right way? (Bar on...

    Did you put the diode in the right way? (Bar on diode is on the Vin side)

    How are you powering it? USB only? Or do you have external DC also (J3)? At any time, do you have both at the same time?
    ...
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    Would you want the Teensy to upload a precompiled...

    Would you want the Teensy to upload a precompiled hex stored on SD card?

    Its possible, if you write UPDI uploader using one of the teensy UARTs

    Not sure the effort is worth it, unless you have...
  19. You can power off the micro-USB, which should be...

    You can power off the micro-USB, which should be rated to 1A @ 5V (the connector is rated for 1A, make sure your cable and power source are also 1A rated). Otherwise, USB with data is typically...
  20. From 12V, I sometimes I make 5V and 3v3 using 1A...

    From 12V, I sometimes I make 5V and 3v3 using 1A switching regulators, the 3v3 for powering other devices, which connect to T4 via logic gpio. Be sure to tie grounds together. Don't connect the 2...
  21. Circling back, can only get SW I2C to work with...

    Circling back, can only get SW I2C to work with U8G2 library on WIRE1 (2nd i2c port).

    Some discussion on Github on getting it to work with T3. https://github.com/olikraus/u8g2/issues/1175, which...
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    Google imxrt1176 coming soon

    Interesting news

    https://www.hackster.io/news/google-unveils-the-coral-dev-board-micro-its-first-microcontroller-based-tinyml-edge-ai-board-31364ab0db63
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    USB-C for programming may not be possible. The...

    USB-C for programming may not be possible. The T4.1 is programmed via the micro usb.

    Consider adding QWIIC
  24. Start here ...

    Start here

    https://forum.arduino.cc/t/arduino-modbus-tcp-slave-server-ide-example/590585/3

    Replace ethernet with nativeethermet or qnethernet.
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    @noisymime Did this work for you? I'm thinking of...

    @noisymime Did this work for you? I'm thinking of implementing the same circuit, based on the Panasonic pdf. Did you put Vbat at the battery or at the load?

    27259
  26. Transformer you say?? They are not usually...

    Transformer you say?? They are not usually regulated, so the output voltage can vary on load. Unless there is a regulator in the transformer.

    But commonly, you get the step down voltage and a...
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    Shawn, An example that mimics the...

    Shawn,

    An example that mimics the single-pulse-per-second: https://www.nxp.com/docs/en/nxp/application-notes/AN12149.pdf, would be nice to verify timing with a scope.

    What that means for your...
  28. @shawn, that's fantastic. I'll take a look over...

    @shawn, that's fantastic. I'll take a look over the weekend. Happy New Year and thanks!
  29. That was what I was thinking, but didn't want to...

    That was what I was thinking, but didn't want to assume. Thanks for the clarification.
  30. Shawn, does the flush() only apply to TCP? Or...

    Shawn, does the flush() only apply to TCP? Or should/can it be used with EthernetUDP?
  31. The component in the T4.1 looks very much like...

    The component in the T4.1 looks very much like this one: DM3D-SF...
  32. Thanks KurtE, I looked at it, was using SD.h, but...

    Thanks KurtE, I looked at it, was using SD.h, but it was proclaimed to be a thin wrapper for sdfat, so I moved over to that library. Perhaps I should move back.

    The 2 options I found:
    A. wire the...
  33. best practice for detecting SD card eject with sdfat T4.1?

    What's the best way to determine when card gets abruptly ejected during logging?

    Using TeensyDuino 1.55 with SDfat 2.0.5beta

    I tried to use



    void writeMyFileSD() {
    if...
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    As suggested earlier, you need a closed loop...

    As suggested earlier, you need a closed loop servo system. PID works pretty well here, see https://electricdiylab.com/arduino-pid-dc-motor-position-control-close-loop-system/

    You don't have...
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    Schematic? For SPI, each slave device needs a...

    Schematic?

    For SPI, each slave device needs a unique chip select, see CS/SHDN on the MCP3008. Is it wired that way?
  36. could it be a ground loop? Or a power path going...

    could it be a ground loop? Or a power path going thru the USB?

    Is the laptop plugged into wall power? if so, disconnect laptop from wall power (run on battery) and disconnect any other cables...
  37. I am happy with any interface, simple amd that...

    I am happy with any interface, simple amd that has example code. I'm a brute force programmer, and was hoping others would chime in here.
  38. Shawn, My last TCP project has been working...

    Shawn,

    My last TCP project has been working very reliably, thanks for your help and this library.

    I see you have a reference to Dan Brown's implementation of IEEE1588 on your Github readme. Is...
  39. At the moment, it's not doing much. It will have...

    At the moment, it's not doing much. It will have a display at some point, and user input on a nav switch.

    But at 24mhz clock, jitter will be too much (41nS). I tried generating a square wave,...
  40. Running T4 here. This looks like a good...

    Running T4 here.

    This looks like a good starting point: https://github.com/manitou48/teensy4/blob/master/gpt_capture.ino

    A GPT can't flip a pin directly on input capture or force a output...
  41. Jitter free square wave doubler with TeensyTimerTool?

    I have a project where I'm getting a square wave at ~48 Hz and I need to create a ~96Hz square wave with minimal jitter.

    Last time I tested with the "machine", I was using a combination of...
  42. Thread: Canbus use

    by TeensyWolf
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    Also, you will need the CAN Transceiver hardware...

    Also, you will need the CAN Transceiver hardware between the Teensy and your CANBUS.

    You can get a SN65HVD231 and wire it up yourself with a cap and few resistors.

    Or OTS options exist, here's...
  43. Try QNEthernet instead of nativeethernet

    Try QNEthernet instead of nativeethernet
  44. The comment on the MOSFET circuit is still valid,...

    The comment on the MOSFET circuit is still valid, it will probably distort your square waves. You would have to test and look at scope. If you are only 12KHz, it might be fine. But it's not the right...
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    I can't seem to get this working with the...

    I can't seem to get this working with the attached ZIP file or the git lib: https://github.com/FrankBoesing/T4_PowerButton

    The git library tells me the board is not supported. I think...
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    I'll update as i learn more. One MM certainly was...

    I'll update as i learn more. One MM certainly was working for a few days. The other i never was able to get windows to assign a COM port.
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    I'm using my custom board mostly. I have 3...

    I'm using my custom board mostly. I have 3 devices up & running for over 24 hours, so that's good. I'm not doing any code development presently or much rebooting, just letting them run.

    So right...
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    When they bricked, I was developing in the custom...

    When they bricked, I was developing in the custom board, I wasn't using the Sparkfun board for anything but troubleshooting the MM.
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    Did you resolve? I have a couple of Teensy...

    Did you resolve? I have a couple of Teensy MicroMods not responding, one did report the Opps message before giving up. completely.

    I did see the Opps message on another one, was able to recover by...
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    Unsure what it could be. I've been using the...

    Unsure what it could be. I've been using the Sparkfun Datalogging board for my reference, but developing in my custom PCB. I feed it 3.3V from LDO, made from 5V DC/DC brick, being fed 12V, at some...
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