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  1. Replies
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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...
  6. 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...
  8. … 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 ...
  9. 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...
  10. If a single FFT4096 is not working like in prior...

    If a single FFT4096 is not working like in prior posts then something must be missing/wrong AFAIK.

    Using 'averageTogether' with a larger number was only to help when trying multiple large FFT's -...
  11. Does the Bt module output data continuously? ...

    Does the Bt module output data continuously?

    As noted in p#2 'if (Serial1.available())' shows how many characters are waiting from input to Seria1.

    Is this the desired test or is this just to...
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    Just got as far as putting PWM to test on...

    Just got as far as putting PWM to test on 34,35,36 that are Jumpered to 37,38,39 for digital read testing on the PCB edge where I put a female header.

    I run a pass of that then swap the halves to...
  13. Looking at another post for FFT256 the other day...

    Looking at another post for FFT256 the other day I was reminded it does 'naverage = 8;' for that size FFT.

    Was wondering is a call to this with a number of 2 or 4 :: averageTogether(uint8_t n)...
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    Opps - I asked about that a time or more because...

    Opps - I asked about that a time or more because koromix will need to see it for the T4 time transfer during upload.

    Recently found the github source and saw this August 11 Issue:...
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    Look through this thread for USB devices...

    Look through this thread for USB devices tested and working - as noted easy on T_3.6 as it ships soldering a simple cable ( available from PJC or other ) - and much of that was tested on the Teensy 4...
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    I hadn't read the BLOG - @wwatson - thanks for...

    I hadn't read the BLOG - @wwatson - thanks for hinting to look for this :: pjrc.com/improving-arduino-serial-monitor-performance/

    And also that is an interesting observation - Indeed I haven't...
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    An adapter to fit wasn't found/planned - it would...

    An adapter to fit wasn't found/planned - it would collide with the USB Host pins. It allows a ribbon to pull the pins out. Look here breakout-board-for-teensy-4-0 - about the 7th pic down with...
  18. @Jean-Marc: Please do. I could use it as a test...

    @Jean-Marc: Please do. I could use it as a test for my debug_tt to enable FAULT detect and see how it might be handled. Might be an good enough reason to get back to that and make it generally...
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    Post #7 gave notes on the explicit p#11 code. ...

    Post #7 gave notes on the explicit p#11 code.

    In setup() just add :: set_arm_clock(300000000);

    Pick the desired Hz and the code will pick the workable freq near that. Also in p#7 is this to...
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    GOOD NEWS - I HAVE MY USB BACK with the TallDog...

    GOOD NEWS - I HAVE MY USB BACK with the TallDog T4 direct pinned breakout I assembled.

    I was thinking if I put flux on my desolder braid I could pull off all the solder and lift the Flex cable -...
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    Yes, there it is - it has a link to TRNG ::...

    Yes, there it is - it has a link to TRNG :: https://forum.pjrc.com/threads/54711-Teensy-4-0-First-Beta-Test?p=195000&viewfull=1#post195000

    To link to a specific post - right click on the post # -...
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    Those sketches have likely not been updated for...

    Those sketches have likely not been updated for Teensy 4 hardware registers. Have to check the Beta Teensy 4 thread to see if there is a note
  23. Thread: Bum 3.6?

    by defragster
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    I found the odd unit here when I ordered the KS...

    I found the odd unit here when I ordered the KS Bulk pack. Just pulled each from shipping and upload sketch and button pushed in some fashion - one acted odd but I dismissed it as user...
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    Search forum for "CS42448" - there were notes...

    Search forum for "CS42448" - there were notes about it being used in some fashion that may be a starting point.

    But indeed only USB Serial is working on T4 at this time
  25. Indeed only 2 sets of 512KB - 1.5 MB would be...

    Indeed only 2 sets of 512KB - 1.5 MB would be cool … maybe the next version.

    Never filled the filled the first 512KB of RAM and had T4 halt/not boot? If you have a repro case I wonder if there is...
  26. Thread: Bum 3.6?

    by defragster
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    I started to reply with the only test that came...

    I started to reply with the only test that came to mind - beyond soldering issue.

    Before soldering was there a series of uploads and button presses done to say if 'normal' behavior was seen from...
  27. Nice looking work! AFAIK the answer to this is...

    Nice looking work!

    AFAIK the answer to this is : Using DMAMEM provides compile time alloc to the same area that malloc() uses at runtime - the second 512KB RAM block.
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    For the cable - taking drawing above for a quick...

    For the cable - taking drawing above for a quick hack in paint - removing the 3v3 and GND would help with the trouble observed here - and particularly the lockups maybe it wasn't a current problem...
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    I can confirm that @KurtE - no selection when...

    I can confirm that @KurtE - no selection when offline.

    Also BATCH #3 of Teensy 4.0 must have been a BIG one - and #1 and #2 none too small. SparkFun has this on that item::
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    Reading of the Flex Connector loose fit I wasn't...

    Reading of the Flex Connector loose fit I wasn't going to use - but mine locked in tight - no wiggle - no play, so I soldered it … have since removed it :(

    So far the 15 second Restore is...
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    @loglow - safe travels. Standoffs sound...

    @loglow - safe travels. Standoffs sound outstanding, the ones I have are too large for the holes provided.

    I didn't get back to the iron to check on USB line(s) I lost - will be another day - they...
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    @firehopper - those resistors are only needed or...

    @firehopper - those resistors are only needed or used when the indicated BUS ( i2c or SPI ) actively uses those pins and the resistors apply a pull-up for those pins. If those pins are put to other...
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    Using a Teensy 3.2, 3.5, 3.6 to prototype you can...

    Using a Teensy 3.2, 3.5, 3.6 to prototype you can start working immediately - Teensy 4.0 support will arrive ASAP and should be expected to be compatible when complete.

    At this time Teensy 4.0...
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    mod PinTest was hidden as attachment in p#93...

    mod PinTest was hidden as attachment in p#93

    T4 breakout dried overnight and seeing pin 37 showing 700 Ohms to 3V3 and pin 36 now at 5K Ohms to 3V3. Pin #36 looks much better.

    Pin #36 not on...
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    just a guess: the missing timestamp is part of...

    just a guess: the missing timestamp is part of recent speed rework work in progress?

    t_sermon running here since last post now beyond this 27778 seconds - but running fine and no amount of...
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    @Paul: Did UNZIP of 1.8.10 on Windows 10. ...

    @Paul: Did UNZIP of 1.8.10 on Windows 10. TeensyInstaller ran well - no issues. IDE 1.8.10 must not be on KNOWN list yet as I had to tell Windows to RUN ANYWAY. Had to Approve JAVA as usual - then...
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    Went back with the hot iron solder sucker to try...

    Went back with the hot iron solder sucker to try to pull out solder from that edge. Actually the measured resistance was 122 oms not 145. Then I bumped the meter to 2K from 200 range and pin 37 had...
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    Thanks for that … it was just a TEST - I get...

    Thanks for that … it was just a TEST - I get stalling on Win 10 when I resize a BUSY window - it was happening intermittently, though I stopped waiting for that when I spend a couple seconds resizing...
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    Thierry - when it stops - add another Teensy or...

    Thierry - when it stops - add another Teensy or plug in or remove some other USB device - mouse - flash drive. Any chance that makes it restart?

    257K is a good speed - a shame it dies and eats...
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    News but, - not much good - but I managed to...

    News but, - not much good - but I managed to de-solder the ribbon clamp connector with clean pads intact! Dipping clean end of de-solder braid in flux paste is magic! Connector isn't usable though...
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    I added a short header to the breakout - rushing...

    I added a short header to the breakout - rushing I put it on the bottom instead of the top as intended - opps.

    But it works I wired 34,35,36 in sequence jumpered to 37,38,39.

    So this code...
  42. The count of samples { # is 128 } is for 16 bit...

    The count of samples { # is 128 } is for 16 bit samples AFAIK.

    And indeed the pointers noted are to 32 bit values - so they are being consumed/processed 2 at a time.
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    Surprise Fun! arduino.cc/en/Main/ReleaseNotes...

    Surprise Fun!

    arduino.cc/en/Main/ReleaseNotes :: ARDUINO 1.8.10 2019.09.13

    a few things in SerilMonitor - hopefully not merge issue with your t_sermon.

    Nothing super fun for Teensy?

    Added...
  44. With that small snippet of code I can't tell if...

    With that small snippet of code I can't tell if the translation for the 'units' is 8 bit .vs. 16 bit or 16 bit .vs. 32 bit but::

    'end' is the stopping point for the loop. It is based on 'pa' the...
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    Back home - IT SEEMS TO BE WORKING WELL … more...

    Back home - IT SEEMS TO BE WORKING WELL

    … more uploads to T4 and notes shortly …

    All was well - did simple sketches and USB SD Dongle test no problem … moved SD card to SDIO socket and it...
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    Yes, to the best of my patience and ability -...

    Yes, to the best of my patience and ability - some notes in p#145. Did pin tests to breakout pins on PCB from the connector pin legs with DVM and then the PinTest sketch. Tried adjacent pins for...
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    Not sure what is up with the assembly? I see 5V...

    Not sure what is up with the assembly? I see 5V on expected places : VIN, Switch, VHST, VUSB, and high side of two bottom caps? I see 2.5 (?) volts on POWER. Zero on PGM and Top CAP. Near half a...
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    Did a { reflow/futz/desolder/reflow/DVM } test...

    Did a { reflow/futz/desolder/reflow/DVM } test cycle on SDIO/USB connector pins the past 30+ mins. USB WORKS to read SD card with USB Dongle!

    Same SD card fails on SD Socket - going to hope...
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    Indeed I got the SD shroud off - and seemingly...

    Indeed I got the SD shroud off - and seemingly back on after making it look like it was soldered :)

    Then I got the Ribbon connector to 'look' soldered.

    I gave up trying to hack up short AdaF...
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    Nice work on the research. As noted AFAIK that...

    Nice work on the research.

    As noted AFAIK that is the PJRC standard serial number generation from the unique device MAC : "similar to prior Teensys but MCU specific" in where MAC comes from.
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