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    RE: Pin #9 for D/C : Looks like Pin 9 to DC feeds...

    RE: Pin #9 for D/C : Looks like Pin 9 to DC feeds through that display header on its way to the Camera header. Don't cut or it will take a second wire to get 9 over to the camera's tiny gauge pin.
    ...
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    Cool - I hadn't tested image xfer lately -...

    Cool - I hadn't tested image xfer lately - downloaded the ArduCam app - but not yet tried it.

    This was just a pin test of the breakout and seeing why SD (10) failed ... because it is...
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    UPDATE on SDIO SD CARD on PJRC MMod Breakout: ...

    UPDATE on SDIO SD CARD on PJRC MMod Breakout:

    Captured BMP Image from Camera Does make it to the SD card using ::


    if (!SD.begin(BUILTIN_SDCARD)) {
    // if (!SD.begin(10)) {


    But...
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    Ah Test points - indeed they are clearly wired...

    Ah Test points - indeed they are clearly wired that way. That solves some wonder about those large 'vias' and those 'T' pins. Nothing to see here.

    Didn't connect display yet - turned on SDCARD -...
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    The only presentation of the QSPI lines...

    The only presentation of the QSPI lines {pins#48-54} on T_4.1 are on the bottom side pads. Except for unique CS on each set - the pins are the same on both. Newest T_4.1 card or the info on PJRC.com...
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    Cool - Here's a pic of the bare breakout topside....

    Cool - Here's a pic of the bare breakout topside. Shows Qwiic's and SD socket. Evolved from post #349
    24515

    Noticed "T8" is repeated twice on silkscreen holes around the MMod unit - assume one...
  7. Yes, The blink on Pin 13 - the LED pin is because...

    Yes, The blink on Pin 13 - the LED pin is because SD uses SPI bus and the Pin 13 is the SCK or Clock pin for the SPI transfers.

    The T_4.0 doesn't have an alternate pin for SCK.

    Might be...
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    Good day! Glad I found the need to do the screen...

    Good day! Glad I found the need to do the screen write in the callback - scanned the lib/src diffs and didn't see anything jumping out ... so went back to sketch and Voila ... callback getting...
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    Video CallBack needs to write to screen. ...

    Video CallBack needs to write to screen.

    Picture is fully intact - but scrolling with each redraw

    Some other minor edits - but my github wants to push direct to #mjs513 and cannot and I don't...
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    'f' single good, "F" iffy to bad "V" - vid -...

    'f' single good, "F" iffy to bad

    "V" - vid - Black screen ...

    re p#531 - yes I saw that in sketch now

    No VID going to "HM01B0_TEENSY_MICROMOD_FLEXIO_8BIT" - but "F" works at 10.23 Hz

    And...
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    Not sure which f or F I started with ? Meant 'F'...

    Not sure which f or F I started with ? Meant 'F' but think I got 'f' ... Nope I was backwards "F" still continuous ...

    Some more F and f and then :


    startReadFrameDMA called buffers 20029e84...
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    W/ili9341: Says "F" - but using DMA? {if I saw...

    W/ili9341:

    Says "F" - but using DMA? {if I saw that in the git DIFFS ?} - Single Frame good

    the 'f' - took some time to get top bottom SYNC - Horizontal - then popped in and Horiz Stable but...
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    'rework' - yep just moved the from git folder to...

    'rework' - yep just moved the from git folder to libs ...
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    That's no fun ... is github up to date - and the...

    That's no fun ... is github up to date - and the bypass example? I can get to try it here with ili9341 in a bit ...

    ... or ZIP your WIP and post here to avoid cluttering github ...

    Just hit...
  15. Not sure what speeling is either of course ......

    Not sure what speeling is either of course ... seems like it may have been Starting the output with the _isr().

    For usage of that see PJRC.com for intervalTimer as noted.

    If the toggle is to be...
  16. It can help to write out a statement of expected...

    It can help to write out a statement of expected behavior in text. Without that even looking into the behavior of 'close' code won't help because what is wrong won't be obvious not knowing what it...
  17. Yes, always best to avoid delay() unless it is...

    Yes, always best to avoid delay() unless it is short and time critical as that stops other normal loop() code.

    Seems like that gives the needed tools now to work it out.

    It could be done other...
  18. Just seeing the code was modified - but not...

    Just seeing the code was modified - but not compiled or put into the IDE and using "Ctrl+T" to format the code for posting readability - doing that here it starts like - and has some issues so not...
  19. Didn't follow the link - just provided a snippet...

    Didn't follow the link - just provided a snippet in direction of the indicated desires to start and show function and the basic tools that can use Time to control I/O behavior.

    Once that is seen...
  20. ... better luck in the morning :) The p#2 code...

    ... better luck in the morning :)

    The p#2 code could move the code after the "if ( timeGroup > 1000 )" to an independent function. Except probably the "timeGroup=0;" to leave that in control...
  21. That code will count to 5 for each continuous...

    That code will count to 5 for each continuous call of loop() - not noted which Teensy so it could be some 10K, or 100K or even some 1-10 Million per second calls to loop() each second.

    It seems...
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    Also good to know: Interrupts can have the...

    Also good to know:

    Interrupts can have the same or different priority levels on the ARM Teensy's. In groups of 16 between 0 and 255, with 0-15 being the highest level - and most defaulting to 128...
  23. A quick search on dsb - like done to find the...

    A quick search on dsb - like done to find the syntax - might yield more details ... here's a distilled recall from better notes posted elsewhere ...

    Makes sure the handled interrupt indication...
  24. Indeed - when an _isr() takes too long it...

    Indeed - when an _isr() takes too long it effectively never exits before re-entering and loop() never gets cycles.

    Without sketch code, there is nothing else running in CORE code that would block...
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    This is the one "F-RAM™" ( F-RAM is a Cypress TM...

    This is the one "F-RAM™" ( F-RAM is a Cypress TM ) :: $13.20 1Mbit >> cypress-semiconductor-corp/FM25V10-G

    Another part that works is this $4.41 MRAM 1Mbit >> rohm-semiconductor/MR45V100AMAZAATL...
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    Was either one powered to see blink before...

    Was either one powered to see blink before soldering? Other than soldering was either ever connected to anything except the USB cable? Wires or breadboard to anything?

    Did the first bad one Never...
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    FRAM is one makers Ferro RAM ( i.e. mag with...

    FRAM is one makers Ferro RAM ( i.e. mag with retention) where the other is called MRAM

    Look up the parts on digikey { in the 'known_chips[]' or probably links in the thread }- they are similar...
  28. With TD 1.54 ( beta 7) :: SD.h now runs/maps into...

    With TD 1.54 ( beta 7) :: SD.h now runs/maps into SdFat for the added speed and functionality that brings along.
    The SD.h func()'s were just mapped through by Paul, but now the full SdFat...
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    Good on the missed details Paul - stopped...

    Good on the missed details Paul - stopped scanning after seeing it doesn't support QSPI ... but has to be 3.3V part. And even some of the supported parts IIRC have slower SPI interface than when...
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    The one board worked for some time it seems - but...

    The one board worked for some time it seems - but the other never did?

    It is strange to have two boards go bad.

    Boards have distributors. All boards are manufactured and tested and packaged...
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    Any chip on those pins to memory map with...

    Any chip on those pins to memory map with processor supported addressing on QSPI needs setup and interface as done in the linked sources for supported chips.

    The linked chip doesn't seem to...
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    Yes, it uses the same processor and responds the...

    Yes, it uses the same processor and responds the same way.
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    IIRC > @mjs513 wrote support for MRAM - though...

    IIRC > @mjs513 wrote support for MRAM - though smaller - they work. That came about as part of the LittleFS IIRC and the support for that is in current TD 1.54 Beta.

    That LittleFS thread and the...
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    Done, Glad I asked :) - last thing needed is more...

    Done, Glad I asked :) - last thing needed is more trouble ...
  35. Just a quick scan of the code, until this showed...

    Just a quick scan of the code, until this showed something like this could be going off the end of an array where for ( j=0 to limit (n_freq) ) - on the last valid entry it is referring and writing...
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    Supposing this thread was found - but to be sure...

    Supposing this thread was found - but to be sure : forum.pjrc.com/threads/59319-Blynk-Support-for-Teensy-4-0

    A post there might be seen by the maintainer if nothing else shows up. Not sure that...
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    @mjs513 - does this link the ArduCam viewer :...

    @mjs513 - does this link the ArduCam viewer : arducam.com/arducam-host-application-demonstration/ ... there is a zip onder 'here' : precompiled execute program can be download from here

    The test...
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    @geekguy: Did the 15 second Restore proceed as >...

    @geekguy: Did the 15 second Restore proceed as > Button held 15 seconds to RED LED flash, Button release, some ~30 seconds of RED LED on, then T_4.0 return to 1 second Blink?
    > It won't have active...
  39. The "Error opening USB device: No error" may...

    The "Error opening USB device: No error" may suggests a bad cable or some other software on the system has taken control of the USB Serial port or the Teensy doesn't have an active USB Stack running...
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    Arghh - github wanted to merge from your tree...

    Arghh - github wanted to merge from your tree when nothing changed here - had to remove and start over ...

    Installed 'git' but that's foreign - dumping and restarting repositories is a regular...
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    That ST7789 display is the one I just got and...

    That ST7789 display is the one I just got and hooked up - so far just to a T_4.1 and indications are it works well and easily with DC.

    Has a hand plug to 8" Female wires. Put long males headers in...
  42. If using two UART pin sets, each/all UARTS have...

    If using two UART pin sets, each/all UARTS have unique individually settable baud rate.

    Not noted how much data comes in on each stream?

    First guess: Alternating between the two each at 10Hz...
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    Doh - didn't see the single quotes on the 'ZERO'

    Doh - didn't see the single quotes on the 'ZERO'
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    Is the the switch 'VAR' a byte type by any...

    Is the the switch 'VAR' a byte type by any chance?

    Or something odd confusing the compiler optimization?

    switch ( VAR&0xF )
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    I saw some hangs leaving Vid mode as well in some...

    I saw some hangs leaving Vid mode as well in some combination with ILI9341 - thought it was just an invalid command series but it was there. Some part of the DMA left active doing interrupt spasms?
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    @mjs513 does the "case 0x30:" work as "case 48:" ...

    @mjs513 does the "case 0x30:" work as "case 48:" ?

    I've got outdoor things to do as well. Spring sun is sprouting trees in deck cracks and a pickup firewood to unload.

    I did GIT that ST7735...
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    "V" works SO SMOOTHLY! it only works USE_SPARKFUN...

    "V" works SO SMOOTHLY! it only works USE_SPARKFUN - comes up Very Dark without a good "Calibrating Auto Exposure" it seems, and at times it comes up iffy for a bit, one time it was running and went...
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    Saw the PR to mjs513 was taken -testing: ...

    Saw the PR to mjs513 was taken -testing:

    //#define USE_SPARKFUN 1:
    SEEM GOOD :: s, c, D, f, F :: i.e. no signs of tearing or skewing or shift offset in the ILI9341 image
    "d" :: (before FlexIO)...
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    Good luck @KurtE. Will keep using the ILI9341...

    Good luck @KurtE.

    Will keep using the ILI9341 then perhaps swap to the ST7789 when your new work is done.

    Not sure what is up with 'z' - it can work - but sometimes just aborts it seems.
    ...
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    @mjs513 - Noticed the SFun display backlight was...

    @mjs513 - Noticed the SFun display backlight was on during Pin Testing when it should have been off. Nice the single Teensy lib works and not a pile of others needed.

    Saw SPI speed 30 MHz in _t3n...
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