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    See Component Locations here :...

    See Component Locations here : pjrc.com/store/teensy41.html#tech

    Looks like C27

    2.2 uF on schematic
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    Awesome to hear it works there! The QSPI speed...

    Awesome to hear it works there!

    The QSPI speed is what it is basically - at least as Paul sees as safe.

    There are notes in the Little FS thread - it might not be pushed to MAX 133MHz clocking...
  3. As mjs513 said - just a clean TD 1.54 Beta 9 ...

    As mjs513 said - just a clean TD 1.54 Beta 9

    Look at example/lfsintegrity.ino

    Something like:


    //#define TEST_RAM
    #define TEST_SPI
    //#define TEST_QSPI
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    If dev there with SPIFFS is still in the state...

    If dev there with SPIFFS is still in the state the data image would be lost to grow it .... Much better to use the LittleFS. Spiffs was abandoned by its own author some time back (and AdaFruit and...
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    Not indicated which Teensy? T_3.2 does if a...

    Not indicated which Teensy? T_3.2 does if a crystal is added, and T_3.5 and later have working RTC onboard without an added crystal.
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    Good, that also shows that part of the IDE+TD...

    Good, that also shows that part of the IDE+TD install isn't corrupted ...

    Seems either something T_3.5 build specific, or something missing/wrong with the install for MTP. Always tough to be sure...
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    If the SD examples work to see the drive and give...

    If the SD examples work to see the drive and give expected output then the T_3.5 should be in good shape, and that could point to something in the MTP software build.
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    So that is unchanged from p#915 where explorer...

    So that is unchanged from p#915 where explorer doesn't present the drive?
    Assuming the Windows is version 10?
    When it was done here on Win 10 with T_4.x's no 'other' Windows drivers were needed.
    ...
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    TD 1.54 b9 includes the current SdFat so this...

    TD 1.54 b9 includes the current SdFat so this should be removed :: Used: D:\ChuckW\Arduino\libraries\SdFat

    Not sure if that solves anything. And not sure about the rest ... but now posted others...
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    From the 'verbose console' - perhaps showing the...

    From the 'verbose console' - perhaps showing the list of "libraries Used" might point to the problem.
    Have not done this lately - and never with a T_3.x IIRC - but know having 'local' sketchbook...
  11. The T_LC has a Max 100 mA rating on 3.3V - the...

    The T_LC has a Max 100 mA rating on 3.3V - the others 3.x and 4.x show that as 250 mA. But that is just the limit of spec range conversion from rated VIN on each board.

    That doesn't assure it...
  12. Which Teensy ... Have not seen that either,...

    Which Teensy ...

    Have not seen that either, just general consumption table at various clock speeds on some/all Teensy units just idling

    Beyond that lots of variables : What is the sketch doing?...
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    IIRC :: three of us bought a Bt 5.0, or BLE?,...

    IIRC :: three of us bought a Bt 5.0, or BLE?, dongle and work with it went nowhere.

    It was just one of the same - but it seemed like a promising one.
  14. @Frank B - good to see you back on line. Hope all...

    @Frank B - good to see you back on line. Hope all is well going forward.
  15. Awesome. It is cool to have those 4 dwords on...

    Awesome. It is cool to have those 4 dwords on hand to track and save EEPROM and have safe workspace. They do take measurable time to write as they pass through the low speed barrier to the other...
  16. I missed that - good work @MichaelMeissner and...

    I missed that - good work @MichaelMeissner and all the best for getting off the sidelines.

    As far as USB connectivity - see the "Many-TLAs" thread linked in p#2.

    It allows a Teensy to show one...
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    Awesome. Hopefully @vjmuzik is online to see and...

    Awesome. Hopefully @vjmuzik is online to see and confirm and incorporate the changes.

    This thread will soon be history for Beta 10 and the release of TD 1.54 - so better to get the history and...
  18. not seen any notes on TeensyTransfer moving to...

    not seen any notes on TeensyTransfer moving to T_4.x.

    There is the LittleFS that gives file system support on FLASH - on the T_4.1 or SPI flash.

    Then there is work on MSC or MTP in some fashion...
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    I used a decent Sparkfun iron for all done here -...

    I used a decent Sparkfun iron for all done here - works fine. Got finer gauge solder that worked well, had some solder paste but it is getting old.

    For reference of PSRAM it is EXTMEM, Flash...
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    Just edited @mjs513 post #4...

    Just edited @mjs513 post #4

    Added github link to github/littlefs

    Copied out the //known chips for reference used on T_4.1
  21. This pin test sketch may be useful :...

    This pin test sketch may be useful : pjrc.com/threads/66771-MicroMod-Beta-Testing

    Even has some notes on use posted there.
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    Great that was the answer! ...

    Great that was the answer!

    pjrc.com/store/psram.html PSRAM's are fun :) They are volatile when power is lost - and they are not FULL speed - but the 1062 has hardware QSPI direct I/O access so use...
  23. Hope it helps - post didn't pop up for me either...

    Hope it helps - post didn't pop up for me either so resorted to finding the sample sketch. One sketch does link to April 2019 - but that was before the Enable was found to make it usable.
  24. The 5V is there to use - but is a valid concern...

    The 5V is there to use - but is a valid concern to keep in mind : if it powers something sharing pins with a non 5V tolerant pin, will it ever put more than 3.3V to that pin.

    That is device...
  25. There is NVRAM on the 1062 in the T_4.x's. There...

    There is NVRAM on the 1062 in the T_4.x's. There are 4 32 bit words.

    Below is code that shows it in use from Feb 2021 - discussed in a post somewhere ...
    > It did some things to show function...
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    NativeEthernet

    NativeEthernet was provided by a user and included in TeensyDuino. Not sure about vjmuzik's time/ability to update or maintain. But the best way to have the library fixed/extended would be to post on...
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    I don't see it either tonton81 just a " ? :) " :...

    I don't see it either tonton81 just a " ? :) " : when a Teensy goes nuts ... turning off the SerMon doesn't fix it or stop it sending.
    > not using CAN since early Beta function tests: the...
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    Not a linux user and not sure what "now at 2.1"...

    Not a linux user and not sure what "now at 2.1" is?

    The TD 1.54 latest beta supports versions up to Arduino IDE 1.8.15

    If there is a fix to be had it will come on the to be released TD 1.54 so...
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    Is this the case with the current TeensyDuino...

    Is this the case with the current TeensyDuino 1.54 in Beta 9?

    LINK: pjrc.com/threads/67252-Teensyduino-1-54-Beta-9

    If so post on that thread ... if not enjoy and stay tuned for new betas and...
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    For the T_4.x this is a good set of memory...

    For the T_4.x this is a good set of memory details :: pjrc.com/store/teensy41.html#memory

    512KB RAM1 : holds code not kept on flash with "FLASHMEM" and all runtime variables and stack. It runs at...
  31. Teensy in use not indicated? Assuming a 4.x but...

    Teensy in use not indicated? Assuming a 4.x but 3.5 and 3.6 also have the factory Restore

    It should come back to programmable with just a Button press {perhaps a power Off/On} - not needing...
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    OSHPark makes them in Purple - Just showing the...

    OSHPark makes them in Purple - Just showing the T_4.0 they used to do a T_3.2?

    $18 Teensy 4.0 - Purple OSH Park Edition
  33. Very good you got to the problem and worked...

    Very good you got to the problem and worked through it. Will be interesting to have the solution posted.

    Like that 10 channel code that was special purpose for the example at hand - probably the...
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    @Paul : quick question? :: RE Audio code in post...

    @Paul : quick question? :: RE Audio code in post #9 - how can the two DAC's get sine out of phase as the p#11 sample above?
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    yes, clearer Odd it would be any worse ?...

    yes, clearer


    Odd it would be any worse ?
    Conditionals can alter a few cycles with compiler optimizing and a change in path can change 1062's dual execute path - just wondered if that was behind...
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    Can a clear pic of Top and Bottom be shown to...

    Can a clear pic of Top and Bottom be shown to show soldering and attachments made?

    Perhaps if VIN were Reconnected to VUSB and the external power were not applied it would show something different...
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    Well that isn't cool. Made Changes Scanned...

    Well that isn't cool. Made Changes

    Scanned the code wrong saw = -twopi instead of the -= twopi as written ...
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    @geekEE :: Quick search found this thread for...

    @geekEE :: Quick search found this thread for T_3.1 - at the time Paul linked to this thread on the PWM page for solution.

    It won't necessarily MAP directly to the T_4.x's 1062 MCU - but might...
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    If externally powered - hold the button until...

    If externally powered - hold the button until just after the Teensy gets power to make sure any code on the Teensy does not run, but stays in bootloader.

    If the timing is right for the 15 sec...
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    Code found from another post {by Paul}...

    Code found from another post {by Paul} was edited to get that and it results in two waves?
    25003

    T_3.6 dual DAC output read by T_4.0 ADC code and sampled out to IDE Plotter with these notes on...
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    Question does "what constitutes jitter" mean...

    Question does "what constitutes jitter" mean "what causes jitter" ?

    Does this change what is shown on the scope? Don't have one here, and coded in browser ...
    Uses pre-calculated state on entry...
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    According to the Audio Gui { right PANE when the...

    According to the Audio Gui { right PANE when the left PANE item is clicked } it is the same: pjrc.com/teensy/gui/?info=AudioOutputAnalog

    The above AUDIO code was replaced with this direct code...
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    For the 15 sec Restore the Red Flash is when the...

    For the 15 sec Restore the Red Flash is when the Button should be released to complete the restore. Did that happen then followed by about a minute of Red LED on? If held seconds too long after the...
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    It seems it can be done - reading the INFO below...

    It seems it can be done - reading the INFO below and then browsing the code:


    #include <Audio.h>

    // GUItool: begin automatically generated code
    AudioSynthWaveformSine sine2; ...
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    There are also usb 'dongles' that go inline from...

    There are also usb 'dongles' that go inline from the USB Host and give an idea of the current passing to the device.

    They can be cheap or elaborate and measurement accuracy or resolution will be...
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    Not seen a lot of ref to "wfi" with T_4.x's. It...

    Not seen a lot of ref to "wfi" with T_4.x's. It sleeps until the next _isr() triggers where the usual Millis_Timer_Tick does not count on T_4.x.

    With Audio it has interrupts ... but also active...
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    Using the analog code directly with : ...

    Using the analog code directly with : analogReference(EXTERNAL);

    Allows getting 3.3V range - is there a way, and a reason, to have the Audio code allow something similar?

    I took a T_3.6 to...
  48. Assuming this was for @defragster? Current code...

    Assuming this was for @defragster? Current code not posted - just a modification of a drum piezo example ( twin ADC reads of 5 channels each ) done some months back and revisited recently in another...
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    Very good - was on my list to ask after this post...

    Very good - was on my list to ask after this post last month:


    With a lot of bootloader work in progress between MMod and encryption makes sense to see it all fully tested.

    The last encryption...
  50. That is odd. Perhaps from ADC usage, but if...

    That is odd. Perhaps from ADC usage, but if handled right those numbers should be returning right.

    One of the micros() test for its beta release IIRC was a 1MHz timer interrupt watching micros...
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