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    If and how well any 'non sanctioned' JTAG/DEBUG...

    If and how well any 'non sanctioned' JTAG/DEBUG hack works is based on what a search shows. It has apparently worked for some Teensy models - but PJRC nor anyone seen around here much uses it AFAIK....
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    Given post #890 a test was added when DIR is...

    Given post #890 a test was added when DIR is shown - and a DIR is shown on start in setup().

    It is consistent as noted above after the 3rd 'R'estart process from a fresh format the following...
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    Added "D" to Integrity, it walks the dir reading...

    Added "D" to Integrity, it walks the dir reading every file up to the returned file.size(). Reports Error if it doesn't get that many and also stops reads with error when it exceeds the reported...
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    Best to start with and be able to use the Arduino...

    Best to start with and be able to use the Arduino IDE as it is supported directly - and is the common denominator for all posts and sketches when questions arise. It is also straightforward to...
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    Those pins were placed for potential support. ...

    Those pins were placed for potential support. PJRC has not yet exposed a means for that.

    Perhaps WWW search will find some creative solution offered by 'others'
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    Cool ... Occurred to me as way to make it more...

    Cool ... Occurred to me as way to make it more understandable and usable for test and ref. ... one FS Media at a time.

    There are other examples where a CORE bus/concept is presented with sub...
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    RESTART testing was never part of my process here...

    RESTART testing was never part of my process here until seeing when RAM disk could warm restart.

    With that finding - all the dCache devices (QSPI FLASH) need the static_sync add of dcache_flush -...
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    Worried ... Me too. But was end of day ... and it...

    Worried ... Me too. But was end of day ... and it was easier to sleep throwing the issue out to @all 'test' ... assuming PJRC changes to .LD files or startup.c that had just shown need for change.
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    @Paul/@all RE: LFSIntegrity As noted it was a...

    @Paul/@all RE: LFSIntegrity
    As noted it was a Swiss Army knife morphing as Media were added and test avenues crept in - and still are ...

    For more useful User Examples - something that made no...
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    RE: 2nd Header :: IIRC @mjs513 was pushing the...

    RE: 2nd Header :: IIRC @mjs513 was pushing the envelope for NAND and wasn't sure it would get done for TD 1.54 - so kept was separate.
    > at this point it managed to mature and work, so suspect it...
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    Trying to debug this and recalling that SIZE's...

    Trying to debug this and recalling that SIZE's are returned as 64 bit.
    Learned this before - and seeing some print anomalies trying to debug ... doing cleanup ...

    These common methods:

    ...
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    UPDATE LittleFS working properly :: Did wipe of...

    UPDATE LittleFS working properly :: Did wipe of IDE 1.8.15 folder and fresh unZIP and TD 1.54b10 install and LittleFS is fine DMAMEM/RAM2 for RAM_DISK

    Not sure what caused the build error - but...
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    Clean Install and all is well. Did 15 sec...

    Clean Install and all is well. Did 15 sec Restore of both T_4.0 and 4.1

    Win 10 : IDE 1.8.15 unzip : TD 1.54 B 10 install

    Using IDE and TeensyLoader and IDE SerMon.

    Various : 'B' and...
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    Okay - I need to clean something. Something...

    Okay - I need to clean something.

    Something not right in that it worked okay at first - until restart - then it started going wholly bad

    On the RAMDISK - does the restart noted here from the...
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    Temp is a spot temp internal to the MCU...

    Temp is a spot temp internal to the MCU somewhere, not what is apparent on the casing.

    50C doesn't sound awful - depending on the workload - and not running OC above 600 MHz. I haven't watched...
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    @TeensyDigital - TD 1.54 Beta 10 was released...

    @TeensyDigital - TD 1.54 Beta 10 was released with a change in startup that Paul saw cause troubles.

    Though something new and bad affecting the LittleFS sketch in use with Beta 10.

    @Paul /@all...
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    Switched to PSRAM ramdrive - 'B'igfile won't...

    Switched to PSRAM ramdrive - 'B'igfile won't complete there either? It hangs after some portion of the write.

    Button and TyComm/Reset has it start and dies early in setup() - next line would be...
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    Took out .flush that was not there before - can't...

    Took out .flush that was not there before - can't even write the Bigfile just now?

    It hangs and keeps hanging on restart until power off ... like DMAMEM adjustment changed how it works ????
    ...
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    Installed 1.54b10 and it works initially on T_4.0...

    Installed 1.54b10 and it works initially on T_4.0

    Seeing odd DMAMEM char buf[490000]; behavior - doing 'R'estart to test static RAM and hanging on restart?
    Saw it on beta 10 announce post ... but...
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    Installed td 1.54 b10 on Win 10 over IDE 1.8.15 -...

    Installed td 1.54 b10 on Win 10 over IDE 1.8.15 - Install good and no problems w/LittleFS LFSIntegrity onto T_4.0.

    Ramdisk note - Primary RAM / RAM1 is always zeroed on any restart to won't...
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    Post #10 showed PROGMEM for the constant image...

    Post #10 showed PROGMEM for the constant image that stays in FLASH.

    The code shown isn't a complete program - so I can't play with it directly and compile ...

    But it shows something that...
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    Not sure any use with threading was tested. SD...

    Not sure any use with threading was tested. SD card I/o uses interrupts or DMA perhaps and can complete its process without being on an active thread.

    LittleFS code is all direct action where it...
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    Are you sure? The T_4.1 has an 8MB Flash so a...

    Are you sure? The T_4.1 has an 8MB Flash so a decent amount of MB free after code. That could be pulled into PSRAM - the copy doesn't take any memory - just FLASH storage. If the data doesn't need...
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    Yes, something must be done ... See this link in...

    Yes, something must be done ...
    See this link in post #2 : pjrc.com/store/teensy41.html#memory

    As noted in that post #2 EXTMEM :: Usage of a 'variable' there will not be initialized { that is:...
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    Typed the text below before I checked that I am...

    Typed the text below before I checked that I am running 1.54b9 with *.LD's from 1.54b8!
    >> I had that thought and copied from the IDE 1.5.13 reinstall ... but apparently left before I built from...
  26. @pedvide provides the ADC library as a personal...

    @pedvide provides the ADC library as a personal external library included with teensyduino: github.com/pedvide/ADC/

    And issues could be made against that github for attention resolution in some...
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    post #853 - lfsintegrity using RAM1 or RAM2 -...

    post #853 - lfsintegrity using RAM1 or RAM2 - DMAMEM ( dammed :) ) - or EEPROM Program memory : didn't see it work ...
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    Installed TD Beta 8 over Beta 9 on IDE 1.8.13 and...

    Installed TD Beta 8 over Beta 9 on IDE 1.8.13 and LFSIntegrity.ino works on T_4.0:


    17:54:31.698 (loader): redraw, image 9
    17:54:40.819 (serialmon 6): Begin, version=1.54-beta8, high-res time...
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    TD 1.54 Beta 9 installed over IDE 1.8.13 beta 7...

    TD 1.54 Beta 9 installed over IDE 1.8.13 beta 7 {working in poist #852}:

    Same sketch EPROM DISK of 1MB :: #define TEST_PROG with if (!myfs.begin(1024 * 1024 * 1)) {

    FAILS to start the T_4.0...
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    Opened IDE 1.8.13 with TD 1.54 b7 and it builds...

    Opened IDE 1.8.13 with TD 1.54 b7 and it builds and runs with 1MB :: LittleFS_Program myfs;

    I'll install 1.54 b9 over that IDE 1.8.13 and see ...
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    I have an ADC sketch running on a T_4.0 and I...

    I have an ADC sketch running on a T_4.0 and I rebuilt that to work.

    Tested the ASCIITable to build and run on T_4

    The LittleFS_Program sketch certainly should not use any of the _RAM code...
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    Won't work here either with RAM that fits or...

    Won't work here either with RAM that fits or DMAMEM???

    Not sure when a T_4.0 may have been tested last?

    With 1.9MB free on FLASH it won't run with a 1MB LittleFS_Program either?
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    PR made for LittleFS to reMount RAM disks that survive a Warm Restart

    From thread : pjrc.com/threads/67500-Another-PSRAM-option-Lyontek

    This :: github.com/PaulStoffregen/LittleFS/pull/12
    >> Note PR was merged as this post was saved - so look for this in TD 1.54...
  34. Done - will move to LittleFS thread with...

    Done - will move to LittleFS thread with github.com/PaulStoffregen/LittleFS/pull/12

    And put notes there ...
  35. Not looking to change the .ld - just checking if...

    Not looking to change the .ld - just checking if it had a named element that was usable - and not seeing it.

    Github is a royal PIA - takes about as long to manipulate it for a PR as to make the...
  36. Left me confused ... too long since touching...

    Left me confused ... too long since touching LittleFS - I did a sync from github and I have this :: bool lowLevelFormat(char progressChar=0, Print* pr=&Serial);
    Seemed to match with td1.54 b9 as I...
  37. Just noted my github is a mess ... I seem to...

    Just noted my github is a mess ... I seem to have some included KurtE change to pass in *Serial? for output redirect?

    That had nothing to do with the change at hand though ... going to look at...
  38. bored ... i KNEW that wasn't the case :) I...

    bored ... i KNEW that wasn't the case :)


    I see it as viewed now but here is the current version with the no flush on RAM1 : 25062

    Tested here with LFSIntegrity.ino - not sure if there were...
  39. Thanks Paul - You are correct! ... an hour...

    Thanks Paul - You are correct!

    ... an hour later I just now see your post and see I went the right direction ... and have it working.

    The other half of the change is to not assume the RAM disk...
  40. @KenHahn - sorry for polluting your thread ......

    @KenHahn - sorry for polluting your thread ... Though it does IMHO greatly increase the value/utility of popping PSRAM chips onto T_4.1's knowing that when possible data is preserved.

    Paul - Mike...
  41. @mjs513 - if you are bored and want to have some...

    @mjs513 - if you are bored and want to have some fun - let me know if you can give this a try.

    With p#16 code the drive FS appears to survive to LFSIntegrity standards where lfs core code does all...
  42. Below should be the extent of the changes for...

    Below should be the extent of the changes for 'static' RAM ( PSRAM and DMAMEM/RAM2 ) LittleFS to survive device Warm Restart/Reset

    I can make a PULL REQUEST : Here is the edited file :: 25061
    ...
  43. Thanks, Might have been browser spasm here - was...

    Thanks, Might have been browser spasm here - was typing a reply and 'focus' was not in the post area ... may have tabbed back and had focus on that check box ... opps.


    Tested against RAM2 ::...
  44. Oh yeah - That was Paul on Release Day ... ...

    Oh yeah - That was Paul on Release Day ...

    Yes, SPIFFS is a forgotten memory ... but I do recall ... IIRC ... it survived warm restarts as written.

    @Paul this could improve the usability or...
  45. @mjs513 - I see above code does duplicate Mount...

    @mjs513 - I see above code does duplicate Mount as written ... but it works ... and gives the Idea


    if (lfs_mount(&lfs, &config) < 0) {
    memset(ptr, 0xFF, size); // always start with blank...
  46. @mjs513 - running test noted p#4 - when a...

    @mjs513 - running test noted p#4 - when a 'R'estart the myfs fails to survive?

    Across a warm restart the EXTMEM/PSRAM image will be present ...

    It seems - IIRC - SPIFFS on PSRAM would survive...
  47. Hi Ken - Had to look up 'Electronic Manufacturing...

    Hi Ken - Had to look up 'Electronic Manufacturing Services for Defense & Military' ... Ambulances and Firetrucks for E.M.S. didn't match with Space and Military :)

    This chip drought is really...
  48. @KenHahn > Good news for an available and...

    @KenHahn > Good news for an available and alternate chip!

    That chip is not an alternative mentioned here :: https://www.pjrc.com/store/psram.html

    Paul made a note somewhere recently about the...
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    The Export from the Audio Tool only defines the...

    The Export from the Audio Tool only defines the parts needed for the Audio code to function.

    The actual sketch as noted with setup() and loop() are needed to provide the actual code.

    Look at...
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    That is Awesome news - I 90% alcohol toothbrush...

    That is Awesome news - I 90% alcohol toothbrush mine before trusting them - then a quick hairdryer blow dry as much as my hand can stand a few rotations.

    Not the first to report error from "flux...
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