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    Having a view of dual core build will be...

    Having a view of dual core build will be interesting to see if something different than RTOS on ESP's and NRF's.

    So much work on Python - the intro book at the ready for Python with Linux steps...
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    @Frank - the copy of imxrt-size I have is missing...

    @Frank - the copy of imxrt-size I have is missing an ending \n=newline it seems? In console output last line shares other output. Not sure if that is correct in current code or as offered for a PR?
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    Indeed they should - but Paul's comment not too...

    Indeed they should - but Paul's comment not too many weeks back was to the effect of he's been looking but not seen anything released that didn't have some issue ... IIRC ???
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    Paul noted recently he's watching NXP offerings. ...

    Paul noted recently he's watching NXP offerings. They acquired a radio aware company - but have yet to integrate it into something usable it seems.

    > "NXP to acquire Marvell’s WiFi and Bluetooth...
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    I can see this being a headache. SD cards have...

    I can see this being a headache. SD cards have known block sizes for efficient write - Little FS is different in that small files fit in the DIR header and larger allocate blocks based on the...
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    That looks interesting - with 9DOF IMU, MIC and...

    That looks interesting - with 9DOF IMU, MIC and the ESP32 (LX6 = 240 MHz dual-core Xtensa LX6) for radio - and planning Arduino support for the RP2040 ... four cores on one board - LOTS of unused I/O...
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    That isn't a 'WARNING' to be concerned with -...

    That isn't a 'WARNING' to be concerned with - unless the one chosen is WRONG - more of informative feedback - actually added to the Arduino system by Paul@PJRC

    Depending on how the environment is...
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    That picture shows lots of FLUX and garbage...

    That picture shows lots of FLUX and garbage around the connections. I would carefully wash the board getting that cleaned off - here I use 90% Isopropyl and a light toothbrush to get residue off the...
  9. No scope here ... showing :: error = -1.12 us ...

    No scope here ... showing :: error = -1.12 us

    With with T or F here :: firstAdjust=false; //true;

    Good PPS GPS not online yet :(

    ... this GPS PPS has a BOUNCE - so Detach() interrupt for 600...
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    Intel took 4 years and $100 Million to make the...

    Intel took 4 years and $100 Million to make the 386 CPU ( 1985 ). Requirements up to then were 2nd chip source for machine inclusion - so Intel licensed prior chips to Fujitsu and AMD ... but not...
  11. Running against GPS PPS here the Teensy clocks (...

    Running against GPS PPS here the Teensy clocks ( T_3.6 and 4.0 ) typically finish get fewer cycles completed per GPS second that 'clock speed'. So that will be one thing to track and offset where...
  12. Good luck. Will be interested to see if the dual...

    Good luck. Will be interested to see if the dual PPS code above as written relates well to your PPS and Pendulum case.
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    Any chance it is running short of power? No doubt...

    Any chance it is running short of power? No doubt you are seeing the RF Noise - just wondering ... Also - What is the satellite transmission freq?

    Years back running GPS and IMU I could power...
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    The Hacksoace #39 magazine (free download) PDF...

    The Hacksoace #39 magazine (free download) PDF link before has 15 pages of PICO images and details and an then interview/pics with the raspberry Boss on pages 54 to 61 (for 2 pages of Q&A). They...
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    Yes as noted by @thebigg - the closing brace...

    Yes as noted by @thebigg - the closing brace wasn't respected on setup() and you can't put a loop() function inside of another function and have it work.

    If "Ctrl+T" had been done it would have...
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    Actually search engines have a very specific set...

    Actually search engines have a very specific set of syntax for advanced searches that return MUCH better results ... but nobody knows or uses them.

    C is simple the bestest most awesomest language...
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    Use of loop() is optional, but including it is...

    Use of loop() is optional, but including it is required because 'Arduino' rules say so - it will be called and as empty do nothing - except return and then be called again ... some Millions of times...
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    In this case the "const int x;" was a problem as...

    In this case the "const int x;" was a problem as noted in the compiler output - it is an unchanging constant value with no initial value.

    It shows twice perhaps because the line has two...
  19. See this post thread for PJRC notes :...

    See this post thread for PJRC notes : List-of-supported-Audio-Lib-Hardware?p=267309&viewfull=1#post267309

    Does that relate?
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    @mjs513 re : "That was first question here " I...

    @mjs513 re : "That was first question here "

    I meant that was my first question on seeing post#101 ... thought there might be something useful of import ... all that occurred to me was the 'unique...
  21. @luni - thanks for link/post - had seen it posted...

    @luni - thanks for link/post - had seen it posted once ...
  22. Yes, that is indicated here from the above :...

    Yes, that is indicated here from the above : github.com/luni64/TeensyTimerTool/wiki/Callbacks#lambda-expressions-and-callbacks-with-context
  23. Looking here :...

    Looking here : pjrc.com/teensy/td_timing_IntervalTimer.html

    The called function takes no parameters: myTimer.begin(blinkLED, 150000); // blinkLED to run every 0.15 seconds

    to call :: void...
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    Not finding a 'Single RP2040' purchase item. ...

    Not finding a 'Single RP2040' purchase item.

    But I do see the REAL cost of buying bulk PI ZERO's - versus the buy one only loss leader purchase of $5 or $10:
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    Funny Paul :) They have 2400 in stock - but...

    Funny Paul :)

    They have 2400 in stock - but have to be bought in groups of "480 $4.00002 $1,920.01"
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    @mjs513 That was first question here ... seems so...

    @mjs513 That was first question here ... seems so as there was to have been a RED LED indication powered with or without USB Connect when charge only cable is present. I could never trigger it as...
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    What fun ... or work. Two virgin parts means one...

    What fun ... or work. Two virgin parts means one test per board where MCU and the FLASH both get altered to limit re-use. Fuses not locked and not write protecting the upper FLASH could allow...
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    Encrypted boot is a follow on evolution after new...

    Encrypted boot is a follow on evolution after new bootloader work on this thread :: Bootloader-Chip-For-Teensy-4-0
    >> Reading through that thread Paul has posted on the current bootloader work and...
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    Wow - that is tedious grief to work through! ...

    Wow - that is tedious grief to work through! Such subtle issues WE never see ... even on Beta test units you've gotten over all those issues ... well except the 'white wire' one which was easy to...
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    The thing is indeed underpowered - but .vs. a 48...

    The thing is indeed underpowered - but .vs. a 48 MHz T_LC it has much more RAM and FLASH and plus two usable cores at 133 MHz.

    This RP2040 is way better than any AVR used for Teensy - how does...
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    It takes some measurable time to make the change...

    It takes some measurable time to make the change in clock speed. Checked it once some time back - but forget the numbers. It does have embedded while( wait for CPU makes change ); that are not...
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    Thought I saw that noted ... so writing to RAM2...

    Thought I saw that noted ... so writing to RAM2 first would allow it to show on warm restart - but going to power down OFF losing RAM2? Maybe 'abuse' those RTC RAM bytes in case they are preserved?
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    And another FREE PDF MAG ::...

    And another FREE PDF MAG :: raspberrypi.org/articles/programming-raspberry-pi-pico-with-python-and-micropython {nothing PICO in this issue - Opps or the blog}


    Raspberry Pi Pico is programmed...
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    Indeed - when it gets PANIC hot it goes too fast...

    Indeed - when it gets PANIC hot it goes too fast and off without notice as I saw. Seemed some print was noted as added - maybe a hook of the WARN temp could add a log entry? But hooking and handling...
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    "That's" a bit vague? Is the point that starting...

    "That's" a bit vague? Is the point that starting support ASAP make Teensy the natural alternative?

    There is already at least one book published on the PICO - changing those things would be...
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    Indeed it could be a chip that works well up to...

    Indeed it could be a chip that works well up to SPEC speed but has some temp/speed sensitive anomaly going OC.

    Adding a tempMon() print might show something.

    Putting a FAN on it will drop temp...
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    The 'download' link in p#5 notes which versions...

    The 'download' link in p#5 notes which versions of the IDE are supported. For supported versions the installer maintains the needed java files to complete a working install on those known versions....
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    Is this on Windows or other? See this page for...

    Is this on Windows or other?

    See this page for OS specific details in any case : pjrc.com/teensy/td_download.html

    If Windows was it a ZIP or Installer from the Arduino site? Windows Store...
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    ... crossposted as I was unzipping and confirming...

    ... crossposted as I was unzipping and confirming for post #13.

    TeensyDuino only works when and because it modifies the JAVA code installed with the indicated installs - that excludes the Windows...
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    Not sure if this relates or helps? Just did a...

    Not sure if this relates or helps? Just did a fresh UNZIP to :: Directory of T:\arduino_1.8.13_td154Port\
    Created :: Directory of T:\arduino_1.8.13_td154Port\portable

    Opened the IDE and The...
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    Don't see set_arm_clock() disabling interrupts -...

    Don't see set_arm_clock() disabling interrupts - but clock and voltage changes might cause chip interruption/stall to DMA or other timing/processing?
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    As noted it is 'code' and indicated by FrankB -...

    As noted it is 'code' and indicated by FrankB - from raspberrypi.org/documentation/pico/getting-started/
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    SparkFun has it and three Pre-Order variations:...

    SparkFun has it and three Pre-Order variations: $10 Micro, $12 MMOD, $16 Thing+ using the RP2040 MCU.

    Interesting speed but M0+, and "264 kB of embedded SRAM in 6 banks"

    Shared code style might...
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    Yes, just back to desk and I see email arrived. ...

    Yes, just back to desk and I see email arrived. Will be a couple hours and I'll give it a look. 107 is free here ...
  45. Thought so - but had to ask if is was near done...

    Thought so - but had to ask if is was near done and might line up with TD 1.54 now it is incorporated for awesome improvement - those write rates in P#33 are better than the old SD read rates.
    ...
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    Started to write ... that but the p#6 SNIPPET...

    Started to write ... that but the p#6 SNIPPET showed attachInterrupt() after pinMode()'s there - yes - that is how it should be done
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    Great news Paul - big difference supporting a...

    Great news Paul - big difference supporting a known system with (fixed) BOM for in house builds - versus supporting a generic range of items like FLASH chips.
  48. @Bill Greiman - is there a feel for the...

    @Bill Greiman - is there a feel for the coincidence of the 2.0.5 b1 timeline being weeks away from release that might coincide with TD 1.54 for use as SD.h ? ... both of course being unknown? Or is...
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    Snippets are usually a distraction - better to...

    Snippets are usually a distraction - better to have the whole code posted if it can't be cut down to a smaller sketch that effectively shows the problem - that's why this :: Forum Rule: Always post...
  50. Not indicated how many RGB LED's are in use? A...

    Not indicated how many RGB LED's are in use? A photo showing the connections might help.

    Quick guess based on something observed here : that GND wire may be feeding large return current through...
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