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    [QUOTE=defragster;288846]So we both did that...

    [QUOTE=defragster;288846]So we both did that (p#25) and got similar results!

    IDE SerMon still can't handle as before - and for Ref TyComm still works well showing it isn't the Teensy falling down...
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    @Paul Out of curiosity I ran the...

    @Paul
    Out of curiosity I ran the usb_serial_print_speed sketch.


    ...
    ...
    count=10037586, lines/sec=0
    count=10037587, lines/sec=0
    count=10037588, lines/sec=0
    count=10037589, lines/sec=0
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    Think the issue actually goes back to the T4 beta...

    Think the issue actually goes back to the T4 beta testing days. It was first identified in this post: https://forum.pjrc.com/threads/54711-Teensy-4-0-First-Beta-Test?p=213179&viewfull=1#post213179...
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    @defragster If I remember right the issue...

    @defragster

    If I remember right the issue boils down to the SerMon implementation that is part of the current Arduino IDE 1.8.xxxx. Just as a hunch I downloaded IDE 2.0 just to test the Serial...
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    Sticky: posted this on the other thread...

    posted this on the other thread (https://forum.pjrc.com/threads/68199-Teensy-4-1-Lockup?p=288611&viewfull=1#post288611) but may be more appropriate here.
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    As @defragster mentioned that depending on the...

    As @defragster mentioned that depending on the crash crashreport will give you a means to find where the error is but if you are loosing the Serial Port and the T4.1 doesn't restart then it won't...
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    Sticky: Ditto to what @KurtE just said. Fantastic job...

    Ditto to what @KurtE just said. Fantastic job especially considering all the moving pieces you had to deal with !!!!!

    Ran a couple of things and all seem like they are working on a Windows10x64.
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    From my perspective don't think there is anything...

    From my perspective don't think there is anything additional bugs - in other words nothing that hasn't already been identified
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    Decided to re-run CoreMark on a locked T4 just to...

    Decided to re-run CoreMark on a locked T4 just to see if there were any differences:


    Locked T4: 2313.57
    Unlocked T4: 2313.57

    No change but didn't really expect there to be.
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    A question - does the same thing happen if you...

    A question - does the same thing happen if you are only using a single T4 locked. When I tried a T4.1 it reset no issue - tried a Locked T4 it gave me an error saying it can not reset and I had to...
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    @defragster - did see this note on the tytools...

    @defragster - did see this note on the tytools github page
    Which I think is what you are saying.
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    Thanks for the explanantion makes sense now. ...

    Thanks for the explanantion makes sense now. Still learning :)
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    I am assuming you mean by 'has a board online"...

    I am assuming you mean by 'has a board online" that a teensy is hooked and powered up. Well, they are grayed out when the locked T4 is online (looked right after I uploaded a sketch. I can open a...
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    No particular reason for pin 7. Think that was...

    No particular reason for pin 7. Think that was just where we had hooked up at time. Easy enough to make the change.

    EDIT: PR issued to update to pin6 for spi examples.
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    Open Hex File Button seems to available but if I...

    Open Hex File Button seems to available but if I go to operation "Reboot" and "Program" seem to be grayed out - not sure thats normal (grayed out even if auto is unselected)
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    PR issued,...

    PR issued, https://github.com/PaulStoffregen/LittleFS/pull/27, changing the comment to "usage". But primarily the PR was issued to update keyword.txt to add "LittleFS_SPINAND" and "LittleFS_QPINAND"...
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    Wouldn't worry too much about LittleFS @KurtE and...

    Wouldn't worry too much about LittleFS @KurtE and I have been testing the heck out of it while testing MTP. Think the only thing we haven't tested was QSPI since we have been primarily using the...
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    @KurtE Just made the changed and on my locked T4...

    @KurtE
    Just made the changed and on my locked T4 shows even better:

    344
    CrashReport:
    A problem occurred at (system time) 11:53:50
    Code was executing from address 0x88
    CFSR: 82...
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    Went back to the Beta1 thread and found @KurtE's...

    Went back to the Beta1 thread and found @KurtE's initial timing timing test: https://forum.pjrc.com/threads/67989-Teensyduino-1-55-Beta-1?p=288241&viewfull=1#post288241, which shows it was 1011ms. ...
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    Just ran it here on my Win10x64 machine and got...

    Just ran it here on my Win10x64 machine and got very similar results:

    With USB type of Serial = 412
    With USB Type of: MTP Disk (experimental) = 6048

    This is on a locked T4 with the latest...
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    @Paul As @defragster said Last night and...

    @Paul

    As @defragster said

    Last night and this morning I tried to fault the Locked T4 doing successive uploads of Tim's code4code sketch and then hitting the pgm button a couple of times in...
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    Something different - went to install TD but gave...

    Something different - went to install TD but gave me an error that it could upload to the folder. Checked in Task Manager and had 2 copies of Teensy_reboot.exe still running. Once closed it...
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    Been exercising the locked T4 with LittleFS and...

    Been exercising the locked T4 with LittleFS and SD (non MTP tests) without any issues (didn't expect any) just testing if any upload issues. Had a stalled upload once today, non-double LED, just...
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    Short answer yep about 1.5mins Memory Usage on...

    Short answer yep about 1.5mins

    Memory Usage on Teensy 4.0:
    FLASH: code:1002292, data:326520, headers:8528 free for files:694276
    RAM1: variables:90976, code:39320, padding:26216 free for...
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    Ok thanks for the reminder. I did just run it...

    Ok thanks for the reminder. I did just run it and seemed to take less than 5 seconds or so from when TeensySize was printed.

    Curious about the slowness as well. Never did a timing comparison...
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    I had thought that the windows pop up was showing...

    I had thought that the windows pop up was showing the file that was loaded - oh well.

    As to your question about the 1MB file - not sure which one that was but the ones I used to test with the...
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    @Paul - @defragster - @KurtE Just noticed...

    @Paul - @defragster - @KurtE

    Just noticed something off (maybe this is intentional) but when using the Locked T4 I noticed that the TL window shows the hex name of the sketch at the bottom of the...
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    At least for me - no didn't have that patch in...

    At least for me - no didn't have that patch in the core for beta2. Just added it and re-ran it with MTP.h included. It worked. Seemed to come up faster as well:
    25803
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    Just tried running the sketch with all the...

    Just tried running the sketch with all the headers commented out except for MTP.h and using MTP Disk (Experimentatl) and crash report is not printing on a Win10x64 machine.
    25800
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    @KurtE - trying to catch up on things and since I...

    @KurtE - trying to catch up on things and since I have pretty much the same library configs as you do I ran your test sketch. Hit the enter and waited - closed the serial monitor and reopened it and...
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    @Paul Finally after I don't know how many...

    @Paul

    Finally after I don't know how many uploads I finally ran into the issue with the dual LEDs blinking on an upload with the Arduino IDE using the locked T4. As @defragster and @KurtE...
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    As I said I am only using the Arduino IDE for...

    As I said I am only using the Arduino IDE for uploads and only Tycommander for capturing serial data or multiple Teensies. Using the IDE I have uploaded sketches (mostly testing MTP and LittleFS and...
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    @Paul Pretty much doing the same type of...

    @Paul

    Pretty much doing the same type of testing with the locked T4 as @KurtE with 1.55beta2 and not seen any issues with uploads.

    Tried to duplicate @KurtE's issue with the both LEDs flashing...
  34. Some added status on examples in the MTP library:...

    Some added status on examples in the MTP library:

    Currently SD, LittleFS, UsbMSC, Cores FS-Integration branches are relatively stable (by relatively I mean we aren't making continuous changes to...
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    Out of curiosity wanted to try and compare temps...

    Out of curiosity wanted to try and compare temps apples to apples:
    25771
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    @Paul Been uploading one of our MTP test...

    @Paul
    Been uploading one of our MTP test sketches that sets up drives for USB drive, SPI, Program, RAM and a external SD Card in order to work out some bugs. But the point of the post been pretty...
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    Doubt your temps are going to match mine - for...

    Doubt your temps are going to match mine - for one I am testing on a different breakout board that you. I am using the one I originally designed for the T4 during beta testing. As I said Temp isn't...
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    @Paul Using the Arduino IDE must have uploaded...

    @Paul
    Using the Arduino IDE must have uploaded 30 times or so sketches (maybe 4 different ones with the MTP one multiple times) with out:
    1. Failure to load or TL busy messages.
    2. RED led...
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    Pretty much the same - you have a few extra's in...

    Pretty much the same - you have a few extra's in there I think but the loop looks the same. See attached.
    25766
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    @defragster Re-ran my PrimeNumbers sketch as...

    @defragster
    Re-ran my PrimeNumbers sketch as shown in the other thread and to compare the differences between 2 locked T4s:
    25765

    As shown almost the same results - both boards compared in my...
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    Thanks for the explanation Paul - that clears...

    Thanks for the explanation Paul - that clears that up that confusion I had in my head.
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    Is that the same for the Teensy Micromod - it has...

    Is that the same for the Teensy Micromod - it has bootloader version 1.06

    EDIT: Hope you got enough rest ...
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    Confirmed on a locked T4 with b2 that program is...

    Confirmed on a locked T4 with b2 that program is erased on restart/power cycle when using 1472K and works when using 960k.
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    Starting with an unsecured T4 but lockable T4....

    Starting with an unsecured T4 but lockable T4.
    1. Verified that a normal sketch without any key.pem file in directory will upload

    10:28:51.005 (loader): File...
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    Updated FS.h, SD.h to include the addition of...

    Updated FS.h, SD.h to include the addition of FS-dates as well as updating SDFat to MAINTAIN_FREE_CLUSTER_COUNT.

    Ran a test USB_MTP_Datalogger example that Kurt and I was working on to test...
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    Downloaded and installed TD1.55b2 into Arduino...

    Downloaded and installed TD1.55b2 into Arduino IDE 1.8.16 with no issues on a Windows 10x64 home edition PC. No bluescreen warnings for TD but did get for Arduino IDE since I install via zip but...
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    @defragster Made a few corrections to the...

    @defragster
    Made a few corrections to the sketch:

    /**
    \brief Clean a D-Cache region
    \details Cleans D-Cache for the given address and size.
    \param[in] addr address
    \param[in] ...
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    Out of curiosity I rewrote the above sketch to...

    Out of curiosity I rewrote the above sketch to use 4 sets of buffers and 4 sets of pointers so you could do the comparison from the same sketch with out have to recycle power I also added Frank's...
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    Fair warning going to show something and assumes...

    Fair warning going to show something and assumes I did it right. Also found that to test accurately you have to cycle the power otherwise gives you a false sense that it works. For instance if I...
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    Somethings that caught my eye when looking up...

    Somethings that caught my eye when looking up DCache functions especially the built in funtions.
    ...
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