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    Good thing I ordered a bunch of those breakout...

    Good thing I ordered a bunch of those breakout boards that @KurtE designed. You really weren't kidding when you said they were expensive :). Just ordered a set - probably won't be here until next...
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    Yeah the debug output is questionable but the...

    Yeah the debug output is questionable but the timing is interesting. But not sure if it is surprising or not. SPIFFS assumes a flat file system (no directories) and think blocks of transfer are...
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    @KurtE Out of curiosity I decided to give the...

    @KurtE
    Out of curiosity I decided to give the BigFile sketch a try using SPIFFS just as a comparison, if I converted the sketch correctly: these are the results with a date code of 1905 on my flash...
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    Very cool on the changes - I like :) Should get...

    Very cool on the changes - I like :) Should get my W25Q512's on Monday so will be fun to test.
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    Just check and mine is showing 1949 - so very...

    Just check and mine is showing 1949 - so very well could be a run number.
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    @KurtE - others Not sure why you new ones are...

    @KurtE - others
    Not sure why you new ones are slower - the timings i showed in post 429 indicate that the beta is running slower then my fresh Flash. Maybe touch up the solder as you said
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    Yeah you are right - that was just me getting...

    Yeah you are right - that was just me getting myself confused on QSPI. In terms of the flash not sure anything changed with LUTS - saw one difference but shouldn't impact the performance.
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    Think in all our earlier don't think we were...

    Think in all our earlier don't think we were using extmem_malloc implementations. Right now in LittleFS:

    bool begin(uint32_t size) {
    #if defined(__IMXRT1062__)
    return...
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    Just out of curiosity just ran @defragster sketch...

    Just out of curiosity just ran @defragster sketch in post #422 using a fresh PSRAM chip on a new T4.1. Some interesting results:
    ...
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    Just checked and you are write based on the...

    Just checked and you are write based on the envelop drawing - 315 mils.
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    Thanks Kurt. Been looking at some flash boards...

    Thanks Kurt. Been looking at some flash boards with pullups but it all over the place 1 has 10ks on all pins, another on CS, WP and hold. Not electronics guy so .... I will leave it at that :)
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    Very cool. Care to share your Gerbers :) ...

    Very cool. Care to share your Gerbers :) Although think I would have edited the pad length on the pins to make them longer for things like the W25N01G chip :) Right now not using any pull ups on...
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    :) thank you

    :) thank you
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    @KurtE - didn't see any breakout boards for it...

    @KurtE - didn't see any breakout boards for it but doesn't mean they are not out there. I made mine own using one of thest:...
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    Morning All Tried porting the W25N01G QSPI over...

    Morning All
    Tried porting the W25N01G QSPI over to SPI and kind of works - sort of. Yes I put one of them on a breakout board. But running into a strange problem. So here goes me trying to...
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    Probably you are right. USB protocol I stayed...

    Probably you are right. USB protocol I stayed away from. I do think functions changes in usb.c for T4 from the T3. But never got into it. BTW. I am the same trial and error.
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    Thought this sounded familiar so went back and it...

    Thought this sounded familiar so went back and it sound familiar and went back. It seems it may be similar to the W25Q256JV. See this post where I went and took a it:...
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    Great - see the cmtp responder also has a bunch...

    Great - see the cmtp responder also has a bunch on events. Didn't dig into so not sure if its both ways.
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    Think that is a great idea. For the last couple...

    Think that is a great idea. For the last couple of days been playing with the W25N01G code to convert the QSPI lib to a SPI proof of concept lib along with looking at incorporating it into the...
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    Poking around on the web for MTP events came...

    Poking around on the web for MTP events came across a repsository: uMTP-Responder. its designed for linux but may give you all a few ideas.
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    @KurtE Very cool on adding the text names to...

    @KurtE

    Very cool on adding the text names to the debug statements. Kept having to cross reference the numbers to the case statement in the MTP.cpp. Thank you.

    Good catch on the event list. ...
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    Very cool! Just did it myself on a Windows 10...

    Very cool! Just did it myself on a Windows 10 machine. Thank you. :)
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    Same thing happens when you do a move directory...

    Same thing happens when you do a move directory as I mentioned. Guess events is on the todo list :)
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    Morning again Well just soldered up another T4.1...

    Morning again
    Well just soldered up another T4.1 with Flash and PSRAM. Ran MTP responder and all seems well especially after I put some files on the chips on the flash. Don't have your mods for...
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    Morning @KurtE In my latest iteration of my test...

    Morning @KurtE
    In my latest iteration of my test sketch I changed the clock on QSPI to 132 Mhz and haven't seen any issues with copying files. Maybe give it a try with the higher speed clock

    As...
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    That's really great news now to do some testing....

    That's really great news now to do some testing. See below

    Move directories and structure between storage areas: Works but doens't work. Tested moving directory between SPIFlash and QSPI.
    ...
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    Just tested the SD version using Builtin_sdcard...

    Just tested the SD version using Builtin_sdcard and a cardreader on pin4. Both worked and identified the existing files on the sd cards. This is on a windows 10 x64 pc.

    Tried the ramdisk version...
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    Getting requirement to set a couple things in...

    Getting requirement to set a couple things in sdfat, sdconfig.h. So you need to download the Adafruit version of SDFat but this is going to be a problem. 1 It will conflict with the one in the core...
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    Very cool. Just downloaded to give it a try and...

    Very cool. Just downloaded to give it a try and also downloaded latest core files + Adafruit SPIFlash library.

    Just one question what is the mod to the board.txt file to select NO USB

    EDIT: ...
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    Are you talking about USB1_mtp.c or USB2_mtp.c. ...

    Are you talking about USB1_mtp.c or USB2_mtp.c. Never thought of looking there to be honest - you made me look :)

    Anyway USB1 I see TX_NUM = 1 and RX_NUM = 1, while is USB2 looks like its TX_Num...
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    @KurtE Went back just to look at the copy...

    @KurtE
    Went back just to look at the copy behavior when it transfers to the BreakOut board, specifically, with sending data in groups. If I watch the progress bar during the transfer of the 1.5Mb...
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    SPICONFIG ???? On the off chance that the SPI...

    SPICONFIG ????
    On the off chance that the SPI Clock may need to increase I looked at what is setup in SerialFlash:

    #define SPICONFIG SPISettings(50000000, MSBFIRST, SPI_MODE0)

    In LittleFS...
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    @Frank B - yes it is :) Fun..... I think ...

    @Frank B - yes it is :) Fun..... I think

    Anyway been doing a bit more experimenting with MTP and the different storage areas and what transfers fail, where and when. There are three files that...
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    Thanks for the explanation. Never really looked...

    Thanks for the explanation. Never really looked at those 2 files before so something new for me, again.
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    Just tried a T3.6 with MTP responder and LittleFS...

    Just tried a T3.6 with MTP responder and LittleFS well strange things are happening. Basically have 2 SD cards and 2 SPIFlahsh attached (propshield and breakout).

    1. All storage devices are found...
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    Just to jump in here for a minute. As Frank...

    Just to jump in here for a minute.

    As Frank and Paul said it would probably be safer in the long run would probably be better to use strlcpy().

    As for filename length whatever gets decided...
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    Hi Kurt Just got back on line and catching up --...

    Hi Kurt
    Just got back on line and catching up -- see I missed a bunch. As @WMXZ could a problem with USB interface. Think Paul may have to check it out when he gets some time.
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    Yep = already figured that one out :)

    Yep = already figured that one out :)
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    Really getting confusing now. Especially since I...

    Really getting confusing now. Especially since I was checking it this morning

    Ok just tried my propsheild again with a 914kb jpg which failed. Then tried with a 90kb file and it worked.
    ...
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    @KurtE Ok just downloaded your screenshot.jpg...

    @KurtE
    Ok just downloaded your screenshot.jpg (105KB) to QSPI flash. It copied it over and shows as 105kb. Then I copied a 1.1MB PDF to QSPI and it worked as well. Both files copied and opened...
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    Morning @KurtE Cool that you got it working. ...

    Morning @KurtE
    Cool that you got it working. Can you send me your image. The one I copied is only 214kb. Want to use the exact one for testing on this end. Having a problem with 1 pdf out of the...
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    Yep just did that so printContainer would work. ...

    Yep just did that so printContainer would work. After the first click on the device or sub directory nothing additional gets sent. If I hit refresh same thing. I edited my post basically to say...
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    Thanks for the explanation, its been kind of...

    Thanks for the explanation, its been kind of interesting to dig around the guts of MTP when I was trying to do it myself. Gave me a new appreciation of the effort to get it working. Kudo's
    ...
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    @PaulStoffregen Don't know if this has been...

    @PaulStoffregen

    Don't know if this has been brought up recently but one improvement to core to make MTP more using with existing sketches is to have MTP+SERIAL. Haven't tested @WMXZ changes that...
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    @WMXZ Set it up so that I now have 7 devices...

    @WMXZ
    Set it up so that I now have 7 devices showing under Teensy. The other night when I tested with the old method was only able to to 6.

    Other thing is when I went back and retest deleting a...
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    Some MTP testing issues and successes posted in...

    Some MTP testing issues and successes posted in MPT Thread: https://forum.pjrc.com/threads/43050-MTP-Responder-Contribution?p=260290&viewfull=1#post260290. Summary for reference

    Copy/Pasting
    1....
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    @WMXZ. Just did a little testing using 2 SD...

    @WMXZ.
    Just did a little testing using 2 SD cards (internal and External), 1 RAM disk, 2 SPIFlash, and 1 QSPI. Just tested some basic MTP functions like copy/paste, delete etc from windows...
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    Thanks will take a look. Getting confused now on...

    Thanks will take a look. Getting confused now on where to post MTP/LittleFS :) But may have to post in both places.
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    Real quick. Thanks. I posted a test sketch that...

    Real quick. Thanks. I posted a test sketch that covers all the storage areas in the other thread. Was planning on checking some other functions in the morning. Will download the latest first though
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    Using TD1.54-beta5 plus the latest and greatest...

    Using TD1.54-beta5 plus the latest and greatest MTP_t4 repository (https://github.com/WMXZ-EU/MTP_t4) and the following modified mtp_test.ino sketch with no other changes to the library itself I can...
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