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  1. This post:...

    This post: forum.pjrc.com/threads/57459-Errors-quot-not-within-region-DTCM

    Suggests this presentation - not noted if it was effective:
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    There are tons of tables built into the headers...

    There are tons of tables built into the headers and code for the Teensy processor in use.

    Cool thing is they work out in the compiler.

    just do :: attachinterrupt( Pin#, ...
  3. Have to assume I was careless or unaware of IDE...

    Have to assume I was careless or unaware of IDE speed setting when first moving to SSD1306 before adding the heat sink that generally works on the other boards to regulate temp controllably and have...
  4. Updated above - smoothed the filler PCB board to...

    Updated above - smoothed the filler PCB board to T4 could better shift. PinTest shows digital function on all pins including the SDIO #'s 34-39

    CardIfno still giving failure? No idea why - two...
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    ... is the sensor actually triggering and...

    ... is the sensor actually triggering and returning 3 times faster? :: "the teensie is reporting up to a 3 times higher flowrate than just before the radio begins transmitting"

    A piece of foil...
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    Any chance the : " a higher flow rate on the...

    Any chance the : " a higher flow rate on the flowmeter that is pretty close to the UHF Antenna "

    Antenna is directly messing with the flowmeter's hall effect sensor? Causing it to detect 3X rate...
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    Okay - Wasn't sure if GND was normally square so...

    Okay - Wasn't sure if GND was normally square so it caught my eye.
  8. Quick follow up on Support from FRDM4236: ...

    Quick follow up on Support from FRDM4236:

    Received prepaid 1 day USPS return label and sending that assembled unit back today. He indicated an assembled unit will be on its way to me when ready....
  9. Wire1 Works on T4

    Had to let a test run last night to SSD1306 i2c display - it is working at 3.3 MHz even with T4 at 912 MHz!

    Just now I modified that sketch with this SINGLE LINE after the #includes:


    ...
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    That looks very good! So much better to see silk...

    That looks very good! So much better to see silk screen refs to prevent confusion in flipping the board.

    Question why are pin #34 and On/Off a square pad?
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    Thx - Was that like forever ago? Indeed I...

    Thx - Was that like forever ago? Indeed I wondered about that misreading/looking at the RefMan memory map. MB == Mailbox not MegaByte :) So if any CAN was active that potion area would be reserved. ...
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    Paul: in ::...

    Paul:
    in :: \hardware\teensy\avr\libraries\Wire\WireIMXRT.h
    I see this which seems out of place for T4?

    extern TwoWire Wire3;


    Also on the rear of the T4 code the only place I see "SDA2" is...
  13. Glancing at the code for Wire indeed the T4 code...

    Glancing at the code for Wire indeed the T4 code shows support in \hardware\teensy\avr\libraries\Wire\WireIMXRT.h for:


    extern TwoWire Wire;
    extern TwoWire Wire1;
    extern TwoWire Wire2;

    and...
  14. Tindie Teensy 4.0 Ultimate Breakout Board by Hyperbolic_Labs

    Second Breakout posting - was there another thread for this?

    The discounted one with missing pin #23 arrived and is now assembled. I did the same PinTest as the FRDM board posted - set all pins...
  15. Unfortunate follow up to this "ODD" post - this...

    Unfortunate follow up to this "ODD" post - this OSH Purple T4 soldered FRDM4236 board has gone offline - LDO or something in Pin #1 corner getting warm and no 3.3V is showing up - so not even able to...
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    In the IDE under File / Examples scroll down to...

    In the IDE under File / Examples scroll down to USBHost_t36. The USB Host hasrdware on T_3.6 and T_4 are the same and all testing to date indicated it works on both.

    There are a couple of USBHost...
  17. Typically Wire1 and Wire2 will initialize to...

    Typically Wire1 and Wire2 will initialize to using the next i2c bus pins. I expect that should work on Teensy 4 at this time.

    so instead of Wire.begin() it would be Wire1.begin() - the same for...
  18. Those steps looks good and complete. I've done...

    Those steps looks good and complete.

    I've done similar - installing to a folder and then putting it on another machine.

    Odd step is #7 - was Arduino started from within the C:\X folder?

    On...
  19. This is the HDD info as used: ...

    This is the HDD info as used:

    C:\WINDOWS\system32>chkdsk h:
    The type of the file system is exFAT.
    Volume label is 120GB_Ext.
    117213184 KB total disk space.
    960256 KB in 12 files.
    ...
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    Opps - should have asked if there was a...

    Opps - should have asked if there was a 'non-obvious' reason :)

    Looking at SSD1306 running here almost 2hours - that seems okay with 2.78 Mhz:: DVM gives me the idea the resistors on the board are...
  21. All tests here were likely fat32 of ExFat? with...

    All tests here were likely fat32 of ExFat? with default cluster size.

    FAT16 makes the FAT a great deal smaller : a single 512 byte FAT read covers twice as many entries - and each entry covers...
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    Glad to test - more glad you did the "ARGH!" work...

    Glad to test - more glad you did the "ARGH!" work making the RefMan make sense in code :)

    As expected. I copied the code without looking - but assumed just those named cases were covered - as...
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    Looks and works fine - THANKS @mjs513 !!! I...

    Looks and works fine - THANKS @mjs513 !!!

    I see this with T4 at 600 MHZ … temp is 48C::

    loopTime=26604964 :: @100khz ---- 125khz >> Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT,...
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    I did want to try it with SSD1306 - will do that...

    I did want to try it with SSD1306 - will do that now with this update. That board has PullUps … they show on the PinTest code posted on breakout thread.
  25. Here is from 3+ years back … diff display ::...

    Here is from 3+ years back … diff display :: youtube.com … ILI9341DualVu

    This thread : ILI9163C-128x128-TFT-driver

    This post a couple down has CODE used - it was for that display - it started...
  26. Indeed - PDF stops at Peak Meter as far as notes...

    Indeed - PDF stops at Peak Meter as far as notes … but ends with 'Part 3-3: Add a TFT Display'

    Look at sketch ::...
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    Heat Sink not required unless overclocked. ...

    Heat Sink not required unless overclocked. 600-800 Mhz seems to generally be okay. Certainly 600 if not encased with trapped heat should be no trouble.

    I just noted because it isn't precluded -...
  28. The Audio Tutorial has an FFT to ili9341 as part...

    The Audio Tutorial has an FFT to ili9341 as part of it … starting there would get that much working asap … then if something fancier could evolve or swap in when the sound stops ...
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    Cool - hopefully not too much brain damage from...

    Cool - hopefully not too much brain damage from the 'Argh!' fight with the refman - is this with the code I saw earlier - or has it been updated in past hours?

    Weird clock not letting it go...
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    Good to see you back for an update Dan. Did...

    Good to see you back for an update Dan.

    Did you give any thought to not putting GND and 3V3 through the cable but routing them on the board to feed the SD connector? Not having those two unmasked...
  31. Seems this question went by in past weeks - may...

    Seems this question went by in past weeks - may have added details there … The Audio Board page shows the PINS used Rev D .vs. Rev C - and the ili9341 connect notes can use the version as if Rev D...
  32. @MichaelMeissner - think you hit that for the REV...

    @MichaelMeissner - think you hit that for the REV D board according to DMM::

    "Power Side":GND to "G":GND is 7-8 Meg Ohms.
    "G":GND to MIC body or SD shell is few tenths of an ohm.
    "Power...
  33. @Brian44 - that is odd output The portableIDE...

    @Brian44 - that is odd output

    The portableIDE option got mention in this post : Teensyduino-1-48-Beta-2

    The following post I gave it a try and left some notes as it worked.

    Do make sure you...
  34. The 1062 can run from encrypted flash - Paul made...

    The 1062 can run from encrypted flash - Paul made some note about implementing that during Beta.
  35. With a second LDO that was switchable - it could...

    With a second LDO that was switchable - it could power the ethernet PHY - and maybe the SDIO. The PHY draws power when OFF, but the SDIO takes a lot of power when on - and the second LDO could then...
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    As @mjs513 notes - and I saw in p#2 code - :...

    As @mjs513 notes - and I saw in p#2 code - : there is something off in the transitions with set_arm_clock - with orderly transitions some affect on millis() clock is resolved - on some others it is...
  37. Multiple Library indications that are just...

    Multiple Library indications that are just 'information'. With IDE 1.8.10 there are lots of them - including SINGLE libraries are often shown, true multiples with show the source for both.

    In...
  38. Look at the Audio examples - they seem to include...

    Look at the Audio examples - they seem to include a few libs. Any not included get brought in elsewhere.

    To experiment open and build an audio example - then comment them out in turn and see...
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    Oh … remembering that missing .end() code now …...

    Oh … remembering that missing .end() code now … Teensy-4-FreqCount-compile-error

    I didn't run the p#25 code - was just looking to see how 'delayMicroseconds(40);' was the fix … it is that and then...
  40. Running that sketch with my single bottom female...

    Running that sketch with my single bottom female header Rev D board it worked on the first Teensy_4 I tried - having run the to be noted sketch first ...

    Putting it on the second top pinned T4 did...
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    Not sure if there is a way at .begin() to get a...

    Not sure if there is a way at .begin() to get a true start value synchronization? I found something close - but it is uniformly off and stays that way once I hack it.

    I'm not up for reading the...
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    Looks like this part - where 40us delay is just...

    Looks like this part - where 40us delay is just the start:


    FreqMeasure.begin();
    delayMicroseconds(40);
    // dummy meas 1
    delay(fmd);
    fmea:
    nm = FreqMeasure.available();
    if (!nm)...
  43. In the IDE: Help / About PJRC adorns the upper...

    In the IDE: Help / About

    PJRC adorns the upper right corner with TeensyDuino version if installed
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    It looks like this time they routed for the 2x5's...

    It looks like this time they routed for the 2x5's at least - that was a fail on their part if the 'gerber' was clear for removing that area.

    As far as the 1mm castellation cuts - that is close...
  45. 3rd thread sounds PIO specific - happy to ignore...

    3rd thread sounds PIO specific - happy to ignore that one :)

    Perhaps:: Starting with p#5 simple sketch would let you confirm the i2c device to operate as expected.

    Not sure what the device is...
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    1 of 3 better than none. I place a 1.6mm order...

    1 of 3 better than none. I place a 1.6mm order that should arrive soon.

    Soldered one of the FRDM4236 boards with staggered castellation SDIO pattern and it went well - looking now it seems to be...
  47. To make a repro case and observe expected or...

    To make a repro case and observe expected or faulty behavior:

    Make the simplest sketch possible and execute the i2c command and validate the returned data.

    With a working library to a working...
  48. My guess would be there is a low level problem...

    My guess would be there is a low level problem that is made worse with the change - it is an extension of the same problem.

    Not looked at the third thread … seems it was another build system...
  49. That seems logical - but not sure there is a rule...

    That seems logical - but not sure there is a rule or expectation that the allocations would in fact be done that way through compiling and linking. Or the problem could be more than an off by just...
  50. Two other new posts about memory and arrays? Is...

    Two other new posts about memory and arrays? Is this all related to the same issue?

    This snippet is the only code posted - but doesn't show the memory allocated for the arrays[] in use - and the...
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