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    Unplug the Teensy from USB load a simple Blink...

    Unplug the Teensy from USB
    load a simple Blink sketch in the IDE
    In the IDE do a Verify Build
    While HOLDING the Button on the Teensy connect the USB and hold the button another second
    Release the...
  2. Can you post the associated text indicating the...

    Can you post the associated text indicating the error?

    Clicking the Adafruit link didn't quickly show the I2S lib used?

    While the ARM'ness may be similar - there are likely architectural...
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    Specifics to the part might help. Is it this...

    Specifics to the part might help. Is it this ~$50 SMD part : digikey.com

    I don't see anyone offering a breakout to that - digikey did suggest an eval board
  4. There are some touchscreens - the problem is...

    There are some touchscreens - the problem is actually the display controller MISO pin not being tri-stated - and it was only observed (at least here) so far on some ILI9488 displays. Touch worked...
  5. Just seeing this. Loglow card is just a copy of...

    Just seeing this. Loglow card is just a copy of relevant pin functions to match the PJRC card - where the underlying function is fixed on the T4.

    There are pins associated with the T4's SPI...
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    that looks like it should run at 3.3V The...

    that looks like it should run at 3.3V

    The pullups should be to 3.3V and not register what was reported as 3.84V
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    At some point the bootloader chip in use that is...

    At some point the bootloader chip in use that is common to other Teensy models will most likely be released with support for the Teensy 4.0 MCU as well. Paul has not posted anything to the contrary...
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    Are those 5V parts? the pullups should show 3.3V...

    Are those 5V parts? the pullups should show 3.3V to the T_3.2 as that device uses a 3.3V signal level for high. Pins may be 5V tolerant - but that isn't the same as working with 5V devices.
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    AFAIK - the answer to date from Paul :: PJRC...

    AFAIK - the answer to date from Paul :: PJRC bootloader chips are limited to support of the same set of MCU chips used on shipping Teensy devices. For more pins there is the OSH Park ref design...
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    Seems there is a way to limit brightness that...

    Seems there is a way to limit brightness that would reduce power to see if that is the problem.

    Not sure if this is the needed/available func - perhaps in setup()?

    /// Set the global...
  11. @charlescarver - What cooling are you using for...

    @charlescarver - What cooling are you using for reliable operation at 1 GHz? ( 1.48 actually at 996MHz unless the boards file edited ) Without good/proper heat removal it can toast the MCU.

    That...
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    The ST7789's here were 240x240 and they worked. ...

    The ST7789's here were 240x240 and they worked.

    There was one thing I noticed - and this may have been done - after upload unpower the Teensy and display then reconnect the Teensy to power. See if...
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    Nice work. Odd the default pin #5 not made clear...

    Nice work. Odd the default pin #5 not made clear in the readme. Talkie was fun - if only there were a way to expand the vocab set. Of course everything I did back in the day was with DAC and prop...
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    Okay - distractions here … just put another PULL...

    Okay - distractions here … just put another PULL note - not sure A0 the best expected default value?
  15. That example looks right given 'a' bigger than...

    That example looks right given 'a' bigger than 'b' - it does go in an integer 5 times.

    The post #1 example "33/55" results in a non-integer less than 1 so that is zero when done with integer math...
  16. try the following - with all right side elements...

    try the following - with all right side elements being int - it gives an int as result to the left assignment:



    int a =33;
    double b =55;

    void setup() {

    Serial.begin(115200); // main...
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    I did a review with a note ...

    I did a review with a note ...
  18. Just saw this today : Measuring Interrupt Latency...

    Just saw this today : Measuring Interrupt Latency

    That is from this NXP page - not sure if you need to be registered to see it : nxp.com …...
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    That looks much better - with the cable first...

    That looks much better - with the cable first those pins can be soldered more easily and tested as good before putting the SD socket in place and then having easy access to those pins without risk to...
  20. Indeed it will wrap - I missed the :: [XXX_index...

    Indeed it will wrap - I missed the :: [XXX_index % buffer_size]

    That matches with " 3 EMC_05 4.5 " posted here :: Teensy-4-0-First-Beta-Test

    The schematic also indicates : EMC_05 | G5...
  21. Thread: Teensy 3.6

    by defragster
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    If 5V was applied to any T_3.6 pin but VIN, it...

    If 5V was applied to any T_3.6 pin but VIN, it is likely no longer functioning properly.

    The higher speed and added functionality of the T_3.6 MCU as manufactured and supplied to PJRC precluded...
  22. What happens after 32 samples and buffer is...

    What happens after 32 samples and buffer is exhausted?

    This "float clock_speed = 600*1e6;" could be "float clock_speed = F_CPU_ACTUAL;" and it would get the speed at runtime.

    Just a note - on...
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    Just noticing what Teensy is in use isn't...

    Just noticing what Teensy is in use isn't apparent?


    in this thread.

    I can use the touch library without interrupts without error, so I have some time.
    I'll try to clarify my questions and...
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    There are larger SMD parts - loglow/TallDog board...

    There are larger SMD parts - loglow/TallDog board is moving to this that others may use : TPS2055A - not sure if that is larger than TPD3S014. The first beta board was a tiny part that soldered okay...
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    Not sure what SPI.usingInterrupt() relates to -...

    Not sure what SPI.usingInterrupt() relates to - but pretty sure it isn't the tirqPin in the touch driver as it is just a signal indicator using a pin independent of anything else.

    It isn't part of...
  26. Current TeensyDuino V 1.48 has Great USB Serial...

    Current TeensyDuino V 1.48 has Great USB Serial support as a device. It is already over running at 10 times the output rate and can overwhelm the PC host since it went from 12 to 480 Mbps USB speed....
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    Good job on the extension between the facing...

    Good job on the extension between the facing soldered pin lines for cable/SDIO - that should remove possibly the biggest problem assembly spot with crowded fine pitch soldering

    With the onboard...
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    @loglow - if PCB A3 wasn't made then all is good...

    @loglow - if PCB A3 wasn't made then all is good as long as we don't confuse the pics A3_p260 and A3_P265.

    @KurtE - did your OSH castellations come out cut right for the FRDM board? If so I'll...
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    @loglow - good to see you back with this - I'll...

    @loglow - good to see you back with this - I'll buy another T4 and build it if you send a Beta kit - full low_pro socket set hopefully? Looking forward to it as it is a nice compact unit that gives...
  30. There are a few recent posts on extending USB...

    There are a few recent posts on extending USB type support on Teensy 4 - bottom line after 11/25 Paul will get to return to his work on this with results following in beta asap
    ...
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    Also might be important what version of...

    Also might be important what version of TeensyDuino. There was a fix about 2-3 versions back where a serial port could get stuck on an error. That was mostly caused by changing BAUD rate IIRC, but...
  32. Setup runs only once about 400 ms after the...

    Setup runs only once about 400 ms after the Teensy is plugged in.

    Other than the delay nothing stops the code from immediately executing and being done immediately after that. There is no wait...
  33. Just a glance - not a Teensy 2 user or much with...

    Just a glance - not a Teensy 2 user or much with USB Keyboard …

    All that code is ONE time in setup()

    It falls through only once - after the initial delay(2000) there are no waits or while() or...
  34. Perhaps trying one of the simpler USB Keyboard...

    Perhaps trying one of the simpler USB Keyboard examples would show desired function. It may be some timing issue when it comes to the Windows 7 machine with the sketch as written?

    If a simple...
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    The attachInterrupt() for ...

    The attachInterrupt() for <XPT2046_Touchscreen.h> is on a device feedback pin, outside the SPI functionality.

    It is used to identify when the touch hardware identifies a touch, giving notice to...
  36. RE #2 - FFT calc is done with overlap when half...

    RE #2 - FFT calc is done with overlap when half of the prior data is replaced with incoming data.

    some notes here: dsp.stackexchange.com...window-periodoverlap-and-fft
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    With that many devices if they are not properly...

    With that many devices if they are not properly tri-stated and using pullups there could easily be bus confusion.

    Refer to this page for more details :: pjrc.com/better-spi-bus-design-in-3-steps/...
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    Good luck on the new Rev D adapter - both not...

    Good luck on the new Rev D adapter - both not losing it and in having it work :)

    I soldered the older slower standard W25Q128FV and found it to work with the minimal test on the Rev D. This post...
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    Wow that is a blast from the past...

    Wow that is a blast from the past!
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    That was a suggested edit to replace ... uint8_t...

    That was a suggested edit to replace ... uint8_t _pwmPIN; - copied from that code. It would then make the 'else' for " if(_hasPShield) { " just work when no call to beginPWM is made since the...
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    Jan 2018 - that was the early Pre Beta :) As...

    Jan 2018 - that was the early Pre Beta :)

    As noted it should somehow default to a DAC pin if present - or an expected PWM pin if no DAC? That was the initial behavior AFAIK after Paul ported it...
  42. Paul notes other commitments will have him...

    Paul notes other commitments will have him otherwise engaged until 11/25 when getting back to USB will be high or first priority. Probably safe to expect updated Beta TD 1.49 in the first week of...
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    Indeed that is true - it was during PropShield...

    Indeed that is true - it was during PropShield Beta I tweaked Talkie to be non-blocking with a queue of sounds to play - some of the examples have that - where this worked for setup - and it would...
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    Glad the "beginPWM" worked. Interesting...

    Glad the "beginPWM" worked.



    Interesting - I saw that "beginPropShield" code and didn't recognize it - but it is the only place the pin was specified. Otherwise this was unset?:: "uint8_t...
  45. It might be running the I/O on rate of...

    It might be running the I/O on rate of F_BUS_ACTUAL { which is 150 MHz at 600 MHz I saw noted past day(s) } - it did on T_3.6 AFAIK - but T4 clocks are unique …

    Note also said F_BUS_ACTUAL goes to...
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    It is possible an update for Teensy 4 altered the...

    It is possible an update for Teensy 4 altered the library code to break T_3.1/3.2 id #ifdef's? I don't see it in a quick glance?

    Perhaps add this for a test :: voice.beginPWM(A14);


    Talkie...
  47. If I follow and remember the buttons/steps: >...

    If I follow and remember the buttons/steps:

    > take Teensy Loader app off Auto per p#2
    > allows pressing Program Button on Teensy and have it stay in bootloader mode, and not Auto Load
    ->> May...
  48. Yes T_3.x and T4 have ARM_DWT_CYCCNT, see this...

    Yes T_3.x and T4 have ARM_DWT_CYCCNT, see this post : pjrc.com/threads/58321-micros()-within-Interrupt-possible. Using that ARM_DWT_CYCCNT takes only about 3 cycles as it is a register read - not a...
  49. Just a note: Arduino is the targeted and tested...

    Just a note: Arduino is the targeted and tested IDE and build system. Working across all supported OS's it is easy for all to install target IDE and TeensyDuino versions and expect to get the same...
  50. It seems the verbose Error info is missing where...

    It seems the verbose Error info is missing where the problem with the schinken/SimpleTimer library would be indicated is missing?
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