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    Indeed this shows on BUILD line for T_4.1 above:...

    Indeed this shows on BUILD line for T_4.1 above:

    Compiling sketch...
    "T:\\arduino-1.8.15\\hardware\\teensy/../tools/precompile_helper" "T:\\arduino-1.8.15\\hardware\\teensy\\avr/cores/teensy4"...
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    Did p#9 update/install on Desktop to fresh unzip...

    Did p#9 update/install on Desktop to fresh unzip of IDE 1.8.15 w/TD 1.54 b9

    Build and TeensyLoader to T_4.1 works as expected with IDE SerMon display.

    Same blinkwithout delay, now with an edit...
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    Windows Install NEW VIRGIN laptop - ALL GOOD. ...

    Windows Install NEW VIRGIN laptop - ALL GOOD.

    Downloaded on desktop : IDE 1.8.15 as ZIP and TD 1.54 b9.
    > reported the TD as SAFE ( TWICE ) on download and in the Downloads folder - both time...
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    Paul is the real voice on this - but "Doubtful"....

    Paul is the real voice on this - but "Doubtful". The Build might offer ability to relocate Flash in linking, but the PJRC Bootloader MCU is hardcoded to specific parts and addressing to perform the...
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    NOTE: release of ...

    NOTE: release of

    pjrc.com/threads/67252-Teensyduino-1-54-Beta-9
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    Note from...

    Note from keil.com/support/man/docs/armcc/armcc_chr

    Made note that allowing unaligned-access will: "speed up accesses to packed structures."
    So that may be the type of thing most affected?
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    Test here was as installed with IDE w/TeensyDuino...

    Test here was as installed with IDE w/TeensyDuino noted in Paul's post.
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    I tried on T_4.1 w/ Windows IDE 1.8.14 and TD...

    I tried on T_4.1 w/ Windows IDE 1.8.14 and TD 1.54 b8:

    >> No problem, no warnings: Printed all three mapped values

    first
    second
    answer


    Goes non-responsive with a number not in the list...
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    Integrated SD_Fat code was tested with 512 GB...

    Integrated SD_Fat code was tested with 512 GB cards last November:
  10. That hasn't shown itself here. Most testing - and...

    That hasn't shown itself here. Most testing - and just attempted repro - done with LFSIntegrity.INO.

    Is the current TD 1.54 Beta 7 or Beta 8 in use?

    It always starts like this after Code...
  11. Was there a test sketch that found the areas of...

    Was there a test sketch that found the areas of the flash not erased?
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    Linked thread post #8 ::...

    Linked thread post #8 :: Haunted-USB-Serial-on-Teensy-3-2
    > Has a suggested memcpy sketch for repro
    <edit> Crosspost p#33 links to SAME sketch/Post

    IDE 1.8.15 change just notes:
    * Fixed...
  13. For sure as el_supremo noted though - using that...

    For sure as el_supremo noted though - using that builtin SD card path uses nothing of any shared SD pins - it has distinct 4 bit data SDIO pins for access.

    Accessing the SD card will make some...
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    No problem on the # Code - everyone has to see it...

    No problem on the # Code - everyone has to see it once sometime :)

    There are other examples - that code is in use on the Teensy MicroMod thread with the B&W camera updating 10 or 15 fps or at...
  15. Note is SdFat is in use so one examples for SdFat...

    Note is SdFat is in use so one examples for SdFat shows this:


    // SDCARD_SS_PIN is defined for the built-in SD on some boards.
    #ifndef SDCARD_SS_PIN
    const uint8_t SD_CS_PIN = SS;
    #else //...
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    ... from observation ... If the changes are...

    ... from observation ...

    If the changes are against a current Beta - then posting on the latest Beta thread can get them 'logged' perhaps. Post 'current beta thread' details and links to the...
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    Added CODE marking to prior post - using "#" on...

    Added CODE marking to prior post - using "#" on toolbar

    To enable the auto DMA update look at the samples there should be one showing use of the ASYNC behavior

    This one seems to do it ::...
  18. Not sure of any reason to do the Disable and...

    Not sure of any reason to do the Disable and Enable, haven't seen it done.

    That is a short _ISR so it might fire twice in quick succession as the faster MCU may not process the interrupt...
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    Good work KurtE - Like Paul with Teensy Model not...

    Good work KurtE - Like Paul with Teensy Model not noted I was assuming ARM - and even questioned the "avr/" without looking at the included console notes :(
  20. ... wondering ... is this a new project for...

    ... wondering ... is this a new project for Tindie or personal
  21. Hi @loglow. Have seen notes on DIY's vBat pin...

    Hi @loglow. Have seen notes on DIY's vBat pin needs power, glad it was a simple fix. Link was interesting that skipping the RTC bypasses the issue when not used.

    That's interesting in that reading...
  22. Not seen this before. Combining MAC and VS Code...

    Not seen this before. Combining MAC and VS Code makes it a rather unique setup.

    Most I know are using Windows and avoid the IDE SerMon using TyCommander. TyCommander has a thread and a github...
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    It won't work to try installing an older...

    It won't work to try installing an older TeensyDuino over a newer version IIRC.
    Either the IDE would need to be uninstalled and re-installed with a fresh version, or a ZIP copy installed and used...
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    That is correct - Always using the UNZIP method...

    That is correct - Always using the UNZIP method for IDE 'install' my path is :
    T:\arduino_1.8.14\hardware\teensy\avr\

    Assuming :: Paul worked to get it in AVR path all those years back when ARM...
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    I was hoping the link found in post #2 was there...

    I was hoping the link found in post #2 was there - but I didn't see it - so added a note at Web-site-could-use-a-few-updates
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    On this page: pjrc.com/store/ic_mkl02_t4.html...

    On this page: pjrc.com/store/ic_mkl02_t4.html

    A link to this startup post info : pjrc.com/threads/64468-Teensy40-only-3-3V-power-supply

    Might help like it did here :...
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    You are welcome! Glad I took the time to find...

    You are welcome! Glad I took the time to find that post from last year - and it was relevant to the issue.

    I didn't check if that info was linked or posted to the 'DIY Bootloader chip' page like...
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    Good catch @mjs513 - I glanced over that but...

    Good catch @mjs513 - I glanced over that but didn't look and see the change to show the ITCM 'padding' called out.
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    With installed IDE 1.8.14 and TD 1.54.b8 For...

    With installed IDE 1.8.14 and TD 1.54.b8

    For another post I just built LittleFS for T_4.1 Program Flash and all looks good and right.

    Did not use IDE, but used TSET and programmed with...
  30. For a test run of TD 1.54.Beta8 with IDE 1.8.14 I...

    For a test run of TD 1.54.Beta8 with IDE 1.8.14 I opened up :: T:\arduino_1.8.14\hardware\teensy\avr\libraries\LittleFS\examples\LFSintegrity\LFSintegrity.ino

    Changes:

    Only uncomment this line...
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    Unless it is a power startup sequencing timing...

    Unless it is a power startup sequencing timing issue with the T_4.1's 1062 - where USB power or tied 3.3V brings it online in proper fashion. IIRC putting a 3.0V Cell level on vBat might assist with...
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    Unzipped the IDE 1.8.14 - running Arduino.exe...

    Unzipped the IDE 1.8.14 - running Arduino.exe system also wanted to Block that - had to click More and Run Anyway.

    Ran the 'unblocked' TeensyduinoInstall_1.54_b8.exe with no issue. Not built...
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    Windows 10 accepted the IDE 1.8.14 download - but...

    Windows 10 accepted the IDE 1.8.14 download - but again is Yelling at the TD 1.54.Beta8 ... Had to explicitly ask for it to be KEPT! Then second screen repeat and then right click and 'Unblock' in...
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    Indeed they have a decent stockpile of unpinned...

    Indeed they have a decent stockpile of unpinned and pinned T_4.1 over 900 total
  35. It is part of pending beta - there is a dedicated...

    It is part of pending beta - there is a dedicated thread where it developed.

    If reading code works look into LFSIntegrity sketch. It enables one type at a time and performs various operations.
    ...
  36. Feeding the dog too fast is as bad as not feeding...

    Feeding the dog too fast is as bad as not feeding it in time. It seems a delay is required, and noted in the linked thread.


    This repository has library for watchdog - though readme is sparse...
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    oppps - didn't open the pic - thought it was a...

    oppps - didn't open the pic - thought it was a VReg test for .BB

    Not sure if I got one of those - ...
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    @Kurt - is that a new VR or the installed one on...

    @Kurt - is that a new VR or the installed one on the PJRC.BB? What voltage does the LED stick use?
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    Ordered 50 of those with with Question about...

    Ordered 50 of those with with Question about 'data sheet' answered :: "YES search AMS1117-3.3 with google or what ever search engine you use, LM117-33 from Texas Instruments " - $8 expected free...
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    Any of these look like a fitting replacement -...

    Any of these look like a fitting replacement - not same brand: amazon.com/s?k=1A+MCP+regulator

    Didn't scan thread for digikey part - it that 5V output or 3.3V? Some of each in the AMZN list -...
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    Good/Interesting the new regulator made an...

    Good/Interesting the new regulator made an obvious sound change! No added Cap or anything else?

    Last I tried running for a failure it ran 2.5 days without locking up or doing the power off...
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    Great news!

    Great news!
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    After a 15s Restore of the factory blink code -...

    After a 15s Restore of the factory blink code - it takes a button press to program as it does not include USB.

    Generally failure like described is caused by bad code. Though Red bootloader LED and...
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    That should restart an ARM Teensy. This should...

    That should restart an ARM Teensy.

    This should put it into bootloader:

    asm("bkpt #251"); // run bootloader
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    There is a way around the appearance that :...

    There is a way around the appearance that : "Teensy 3.6 can have more code than a Teensy 4"

    See FLASHMEM here - and other memory details: pjrc.com/store/teensy41.html#memory


    FLASHMEM -...
  46. Interesting Frank! For T_4.? somebody wrote an...

    Interesting Frank!

    For T_4.? somebody wrote an EPROM decoder/verifier sketch.

    Wondering if such a thing might restore FUTURE function - if not be capable of seeing/saving 'good data?
  47. Glad to hear you found a solution.

    Glad to hear you found a solution.
  48. Not sure of the ways of on mac? How it associates...

    Not sure of the ways of on mac? How it associates and can change that ...
    > Plug it in holding button, perhaps on a different USB port - then upload the Serial only sketch?
    > Do that with a second...
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    Looks to have a set of SPI interface pins : MISO,...

    Looks to have a set of SPI interface pins : MISO, MOSI, SCK

    That is a different format unit - but there are threads with LORA interface that may apply
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    There is a sample delayNanos() here - claims...

    There is a sample delayNanos() here - claims minimum 50 ns to be expected. :: Teensy-4-0-Bitbang-FAST

    Haven't tried it.

    Did do something using CYCCNT that is 1/600MHz and it was min ~20 cycles...
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