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    Certainly shows why they didn't work for us :( ...

    Certainly shows why they didn't work for us :( Still wonder what I did to get #36 messed with and @mjs513's #38 possibly?

    I never tested anything against the wires in the SD connector - as setup...
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    Good signs. I put one in my cart for $10.50.

    Good signs. I put one in my cart for $10.50.
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    Missed that post on new page added to thread it...

    Missed that post on new page added to thread it seems...
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    Very confusing with pins swapping across Card...

    Very confusing with pins swapping across Card sizes in Four-bit SD bus mode :: https://en.wikipedia.org/wiki/SD_card

    and orientation is odd too - top side view above odd where pins on the bottom.
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    oppps … Flipped on Teensy 4.0 Card - or in...

    oppps …

    Flipped on Teensy 4.0 Card - or in @loglow PCB ?
  6. Good luck. Arrays of pointers can easily cause...

    Good luck. Arrays of pointers can easily cause trouble. Hopefully rebuilding it will get it working.
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    I just posted on the @blackketter OSH T4 breakout...

    I just posted on the @blackketter OSH T4 breakout thread where an SD extension board was made for the SDIO pins - where I wondered about caps or other needed.

    For background ref I replied with...
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    Not an EE - know they are power hungry and...

    Not an EE - know they are power hungry and thought it was helpful. The PJRC adapter has 5V circuitry on and single wire SPI so not good ref. I went to onehorse alternate store for Tlera and found...
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    Good work - fast. So a CAP isn't called for to...

    Good work - fast. So a CAP isn't called for to support the SD power needs? Loglow breakout has 3 caps - one for USB - I assumed one was for SD.
  10. Not seen any external debug support. The closest...

    Not seen any external debug support. The closest thing is enabling the FAULT handler - I did that and started a library debug_t3 that I dropped a zip on forum in the past - more than once. Then I...
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    Indeed just like that - Nice image, is an onboard...

    Indeed just like that - Nice image, is an onboard cap called for? Now I see how that detect switch works.

    My non-image was 3 wider to the second side adding cap/chip pads for USB and 5 holes for...
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    Just saw this post - the reset command puts the...

    Just saw this post - the reset command puts the T4 in the OFF state it seems from this post :: T4-software-restart-procedure-and-freeram-function

    So in startup you could selectively initiate OFF …...
  13. As MichaelM noted - I can confirm the PT8211 kit...

    As MichaelM noted - I can confirm the PT8211 kit works {at least on the minimal testing done in Beta} with T4 - when properly wired - same changes as needed for the Audio card where pin locations...
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    Thierry: In my reading of the beta thread I don't...

    Thierry: In my reading of the beta thread I don't recall seeing a way to power up the T4 to OFF. Except as noted if it has VBat and was OFF when unpowered it will then power up to OFF until the 1/2...
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    I was wondering about another level daughter...

    I was wondering about another level daughter card. It would be 9 pins wide to pickup both edge signals with open 0.7" inside to place SD socket and USB connect cable pins or female USB, and the...
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    Very good and promising @wwatson and @vjmuzik!

    Very good and promising @wwatson and @vjmuzik!
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    Anything you can show as a problem is important. ...

    Anything you can show as a problem is important.

    The update to 1.48 was presented in short order to support IDE 1.8.10. Some few changes expected to be good had been introduced since the release...
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    Done! 3 boards at $6.30 per batch of three ...

    Done! 3 boards at $6.30 per batch of three 2 oz copper, 0.8mm thickness
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    OSH took 'teensy4_header_breakout.kicad_pcb' from...

    OSH took 'teensy4_header_breakout.kicad_pcb' from github and it looks right. Looking at the 0.8mm board with 2oz copper - you noted thinner board 'next time' …
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    Also that direct connect method will be missing...

    Also that direct connect method will be missing some electronic support for proper function - a buffer cap and a power surge protector chip? So for proper safe function would require some added parts...
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    @blackketter - hope getting GND over works out -...

    @blackketter - hope getting GND over works out - looking forward to order.



    ... perhaps ordered too quickly - new and improved version pending :) I was going to do that ordering as well - but...
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    Very cool looking! Wasn't sure the SDIO spacing...

    Very cool looking! Wasn't sure the SDIO spacing would work that well

    OSH doesn't show pin map but github.com/blackketter/teensy4_header_breakout does.

    Looking at :


    If the two NC's were...
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    If your voltages/freq's are not seen as similar...

    If your voltages/freq's are not seen as similar to 'Prod T4' in post #210 I can only assume T4 damage or assembly issue - bridges, Flux or other artifacts affecting the results?
    > your test equip...
  24. Yes you did update:...

    Yes you did update: https://github.com/WMXZ-EU/uSDFS

    Downloaded ZIP - closed IDE - replaced libraries files copy and 'logger_RawWrite' works direct device or through HUB to with SD on USB Dongle,...
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    On T4_TDB {TallDogBreakout} here the Paul values...

    On T4_TDB {TallDogBreakout} here the Paul values are each a UNIQUE Double or Half of one of the other pins! That pin #38 is not looking right matching #35.

    Running Paul w/xx=2 kHz from cheap...
  26. Thanks @WMXZ - Yes it is missing in the ::...

    Thanks @WMXZ - Yes it is missing in the :: "...\libraries\uSDFS\examples\logger_RawWrite\logger_RawWrite.ino"

    it works for me adding those lines after this as follows:


    // use following lines...
  27. Using MSC to test USB Host on T4 with...

    Using MSC to test USB Host on T4 with Looger_RawWrite test and keep having to add this code:


    #include <USBHost_t36.h>
    extern USBHost myusb;
    USBHub hub1(myusb);
    USBHub hub2(myusb);


    Would...
  28. The supported tool T4 chain is IDE with...

    The supported tool T4 chain is IDE with TeensyDuino Installer Arduino - but I saw this post that may relate to emulating what the EVAL board use::...
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    I know I ran the one display (st7789) in a thread...

    I know I ran the one display (st7789) in a thread to 48 to 64 and saw faster throughput up to that speed on T4. It was hardcoded lower - probably to device spec - but going to a supported multiple...
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    USB Audio will come online - reference to those...

    USB Audio will come online - reference to those CS42448 posts was to see what was already working on T_3.6 as that ideally will be fully T4 supported. There is an OSH board among those references in...
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    Paul - reading the SerMon blogpost - good notes -...

    Paul - reading the SerMon blogpost - good notes - lots of good work - glad I could help that progress.

    One more thing from reading that: I don't suppose it would be trivial to create and make...
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    Good to see KurtE provides good test/answers too...

    Good to see KurtE provides good test/answers too :)



    Thanks Paul, that Pin #36 got 'shocked' somehow - unless my solder cleanup reduction reflow fixed something that was bridged - because it...
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    TallDog Beta T4 Breakout : USB HDD within a POWERED HUB

    TallDog Beta T4 Breakout : USB HDD within a POWERED HUB ( orinco unit tested on MSC thread - 'logger_RawWrite' )

    WORKS at 8 MB/s with 8K(*4) buffer and 12.8 MB/s bumping to 16 or 24 K DWORD...
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    On this post you can see what Paul tested with -...

    On this post you can see what Paul tested with - scrolling down to Parts List shows part #'s :: pjrc.com/breakout-board-for-teensy-4-0/

    There are other posts relating to this - just posted this...
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    Found Paul's freq change T4_Beta post #2443...

    Found Paul's freq change T4_Beta post #2443 updated for 1062 in FAST IO mode. Included here in updated code with a mod - when xx=2 at file top. Two other modes noted in code, xx=0 is the initial...
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    Adding flux or solder to heat both ends at once...

    Adding flux or solder to heat both ends at once from the side … it might push or lift off

    This works to see about 0.4V between pins. But using Hz measure on that Meter mjs513 also got the same...
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    #36 is CLK on SD - that seems wrong for SDIO use....

    #36 is CLK on SD - that seems wrong for SDIO use. Would be okay for SPI2 CS2.
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    Good'ish news. That is the first note I've seen...

    Good'ish news. That is the first note I've seen of SD card that close to working.

    Cross posted above - took a break between start and finish it seems.

    Without soldering the cover tabs I see the...
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    After pulling the cover and reflow and wick...

    After pulling the cover and reflow and wick 'extra' solder from the SD socket pins - I have not seen the 'While() Halt' or any funny numbers since that 'cleanup'.



    Odd - I see #36 has a bottom...
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    searching for code and links is a pain - #191...

    searching for code and links is a pain - #191 notes it is in #178. Here is an attach of the current wrapped in quote to stand out
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    FIRST NOTE: I asked on T4 Beta thread if USB D-...

    FIRST NOTE: I asked on T4 Beta thread if USB D- is actually NEG voltage and KurtE replied as tested it is differential voltage - but not negative voltage on USB D-. So that doesn't explain my #36...
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    Thanks Kurt. About to post on linked thread -...

    Thanks Kurt.

    About to post on linked thread - Pulled off the metal Cover on the SD socket and my test is running more reliably now from 100Khz to 10 Mhz ? SD socket has #36 between 3V3 and GNS -...
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    I put my SD cover plate on and hit with solder -...

    I put my SD cover plate on and hit with solder - will see if I can wick it off. @mjs513 - does the cover plate fit on and off with the Flex connector installed? It is close - but since I soldered it...
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    Thanks - I ordered and have M3 - those are M2 and...

    Thanks - I ordered and have M3 - those are M2 and I put a White/Black combo in my cart.
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    @Paul - Quick question: Is it correct that the...

    @Paul - Quick question:

    Is it correct that the 'Host USB D-' pin will output a negative voltage? And would having a pin like #36 bridged to that USB D- pin in use be expected to perhaps impair...
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    Looking at SerMon - it was running many times...

    Looking at SerMon - it was running many times with proper numbers for counts!
    Plug in an SDHC card and it stops on the '5' read of Pin36 ... unplug and it resumes ... plug in and stop cycle repeats...
  47. Thanks - I made a note of the '...2BAD' location...

    Thanks - I made a note of the '...2BAD' location - to get back to.
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    Good to hear :) Funny how it isn't until 1-2AM...

    Good to hear :)

    Funny how it isn't until 1-2AM (sleep time) that I get around to figuring out the next step or the code I want to write …

    So that ran overnight and I see a variety of results in...
  49. … curious if Paul is thinking of the next Teensy...

    … curious if Paul is thinking of the next Teensy or a shield for T4 that has no DAC's ...
  50. With a line like this before printing it will...

    With a line like this before printing it will allow 4 seconds for SerMon to connect :: while (!Serial && millis() < 4000 );

    With the delay(5000) as shown it will work the same way and USB Serial...
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