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    Not seeing this repro on Windows - LED comes on...

    Not seeing this repro on Windows - LED comes on then goes off with code below.

    @blackketter - does sending one more byte after wake it up - re-reading first post perhaps not as it notes text...
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    this thread just two days old has links ::...

    this thread just two days old has links :: programming-with-USB-to-Serial-adapter
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    Yes, there is - this was posted in recent days...

    Yes, there is - this was posted in recent days and the link should still be near the top.
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    Also - give a look on the forum for Teensy...

    Also - give a look on the forum for Teensy specific tested/developed CAN libraries.

    This one is now well evolved :: FlexCAN_T4-FlexCAN-for-Teensy-4

    Reading/following that thread and working...
  5. Maybe not related - not sure I have a clear pic...

    Maybe not related - not sure I have a clear pic of using "T_3.6 instead" portion... or the rest of what is at hand ...

    Some tested ili9488's were not set up with tri-stated SPI lines - the display...
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    I didn't think so - but … If that is the case...

    I didn't think so - but …

    If that is the case then having the Host send another Byte or so after '2314' will rewake the receive unit?
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    Don't suppose any of these three changes make any...

    Don't suppose any of these three changes make any difference?



    #include <Arduino.h>

    void setup() {
    while ( !Serial );
    }
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    Paul will be doing a full overhaul of the T_4 USB...

    Paul will be doing a full overhaul of the T_4 USB stack to some degree when the functional first pass is replaced with more efficient methods that may double the speed at least once.

    There is a...
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    Bummer on the board loss - and restocking issues....

    Bummer on the board loss - and restocking issues. OshP got me a T4 okay with PCB's in expected time, Never trusted to order Teensy from Amazon. AdaFruit and Sparkfun got a boatload of batch #3 and...
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    Good to see you here @manitou - remembered right...

    Good to see you here @manitou - remembered right it was K66 testing here : teensy3/blob/master/etherraw.ino - apparently this library set has direct MCU ethernet support and was suggested the PJRC...
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    Sticky: @PaulStoffregen>> Two - things ... sort of three:...

    @PaulStoffregen>> Two - things ... sort of three:

    I updated IDE 1.8.9 to TD 1.48 because for some reason the :: 1.8.10 IDE always rebuilds many USBHost ethernet libs even on a small sketch change...
  12. Good work - looks promising - thanks for sharing!...

    Good work - looks promising - thanks for sharing! I may end up doing wires like that to a T4 breakout {the FRDM4236 and the blackketter USB board} - good to see it can work!
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    perhaps read this post for reference -...

    perhaps read this post for reference - port-and-toggle-question-T4
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    Good enough to give a much better idea, looks...

    Good enough to give a much better idea, looks very neat versus a pile of POGO's. I was wondering if a wire could snake through to feed pin #23 from one of the other pin #23 points?
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    Looked good ... Ordered a normal thickness set of...

    Looked good ... Ordered a normal thickness set of 3 … $6.30 ...
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    So I got the sub-boards USB/SD - but haven't...

    So I got the sub-boards USB/SD - but haven't RE-ordered a main breakout again yet. Is there a right one to order?
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    Very sad for that T4 - Still work on topside pins...

    Very sad for that T4 - Still work on topside pins right?

    And we lost a chance to hear if board works :(
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    I ordered one - what is under the Teensy for...

    I ordered one - what is under the Teensy for connectivity? Surface mount contacts? I see the bottom bolts with no through holes for POGO's? And tindie pics don't show.
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    That looks like a good setup. With updated...

    That looks like a good setup. With updated battery support would be interested.
  20. Only support for Serial as shown is available at...

    Only support for Serial as shown is available at this time for Teensy 4.

    This is work planned/in progress with Paul
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    It seems I just have to run posted code :) when...

    It seems I just have to run posted code :) when I saw the OP code I wondered how much free time was in loop and it looked like you calculated that so I wouldn't have to.

    Though it is ODD that...
  22. The pin pads on the bottom are discussed in the...

    The pin pads on the bottom are discussed in the T4_BETA thread - seems they are 1mm to match a standard ribbon cable and connector.

    The area is too cramped and close to the USBHost pins so it was...
  23. See original post:...

    See original post: Compatible-SD-card-connector-for-Teensy-4-0

    Closing this to avoid duplication
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    Indeed SoftPWM is in the list of libraries not...

    Indeed SoftPWM is in the list of libraries not yet updated for Teensy 4.0:

    Teensy-4-0-First-Beta-Test … Post #4
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    Good you put that off until it was stable to test...

    Good you put that off until it was stable to test against. I suppose there may be some subset of 'right size' and 'right regularity' that could be the perfect solution. But easy to see cases where...
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    NOTE on temps: Running at 960 MHz the T_4 with...

    NOTE on temps:

    Running at 960 MHz the T_4 with active USBHost noted above to LAN through powered hub maintained 78C today not problem.

    Going to another sketch @luni intervaltimer posted - and...
  27. Yes, that is one of the OSH PCB's that can be...

    Yes, that is one of the OSH PCB's that can be used to fix a lost USB micro for T_3.2 and similar.

    Those Teensy 4.0 bottom pads are connected to a secondary USB engine in the MCU, they cannot be...
  28. T_3.2 does not have USB Host - those are the...

    T_3.2 does not have USB Host - those are the device pins.

    The newer Teensy's have connect board pins to hold connector better. Indeed it is not the best design … but it was the standard …
  29. See this thread - not sure the OSH board is there...

    See this thread - not sure the OSH board is there … but it has notes that should apply:: How-to-repair-a-broken-off-Teensy-3-0-USB-connector
  30. Teensy can only be programmed through the USB...

    Teensy can only be programmed through the USB Micro connector - or {for T_3.2} the equivalent USB pins connected on the underside. There is no mapping through UART Serial or other way to program a...
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    There is an IDE 1.8.10 issue falsely reporting...

    There is an IDE 1.8.10 issue falsely reporting the 'Multiple Libraries Found'. It is only a user confusion issue - everything builds properly.

    That code works properly in IDE 1.8.9 - a change in...
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    Indeed no complaints here - looks impressive....

    Indeed no complaints here - looks impressive. Just looking to let you see it tested somewhere else and confirm " pretty much what I would expect the numbers to be "

    Same results even at 396 MHz on...
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    @luni - result on T4 at 600 MHz seem to match...

    @luni - result on T4 at 600 MHz seem to match above.

    Here is that code at 960 MHz:


    Tried at 10008 MHz - it ran a bit faster once - second run temp was up and it DIED.

    Then tried at 396 MHz...
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    edited again to show temps was holding at 78C -...

    edited again to show temps was holding at 78C - blowing over heat sink dropped to 72 - cool enough to pull out more heat swapping fingers down to 66C.

    Same counts as above Tcp takes 18 times...
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    Got back to the latest from github, also running...

    Got back to the latest from github, also running IDE 1.8.9 with TD 1.48 installed there - much nicer build!

    Running T4 at 960 MHz through powered hub.

    fBench doing 1024 messages of 4096 Bytes...
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    Looking forward to an update! Got 3 each of the...

    Looking forward to an update! Got 3 each of the @blackketter USB and SD boards today and no base board to use them with given the thin board fail. Perhaps should have already ordered the thick like...
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    As far as breakout, was thinking of a simple PCB...

    As far as breakout, was thinking of a simple PCB to connect the bottom pads - if SD or USB was needed. Some few bucks a board or less depending on what PCB comes from where and what it gets populated...
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    not bad ... That would be a common concern for...

    not bad ... That would be a common concern for both I expect. The T4.0 MCU on small PCB can eat a lot before adding much and it can go up quickly, and 1170 likely won't be any less - especially if...
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    As @vjmuzik notes the USBHost can get good data...

    As @vjmuzik notes the USBHost can get good data rates to wired LAN with recent work. Though USB Device or HOST direct at some part of 480 Mbps could be an option as well.

    The HOST will need to...
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    MichaelMeissner started such a thread ::...

    MichaelMeissner started such a thread :: Possible-new-shields

    Reading more into Paul's note this thread is expected to discuss and be :: " conversation about the many amazing features of the 1170...
  41. Easy to get confused and harder to get clear...

    Easy to get confused and harder to get clear answers or full use …

    Hopefully good questions on that thread will evolve good answers for general clarity.

    Teensy 4.0 has two segmented blocks of...
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    Indeed what Paul noted is shown in p#2 code :: if...

    Indeed what Paul noted is shown in p#2 code :: if (cycles < 36) return false;

    That would be 36 cycles of 60M/sec?

    And yes, F_BUS is a #define on T_3.x set at compile time and it is a printable...
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    Indeed seems I noted that in some fashion post #6...

    Indeed seems I noted that in some fashion post #6 - and posted yesterday in T4_Beta thread that with OC and USBHost active 1062 can hit 200 to 350+ mA quickly with no display or anything and require...
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    IIRC will be 60 MHz. As suggested in p#2 you...

    IIRC will be 60 MHz.

    As suggested in p#2 you can find it like this::


    setup() {
    while ( !Serial );
    Serial.print( "F_BUS == " );
    Serial.println( F_BUS );
    ...
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    TICKS is processor cycles? … read that as...

    TICKS is processor cycles? … read that as 'millis' timer ticks at first … and this timer really runs on F_BUS according to code below which is some half or less of F_CPU.

    Reading the PJRC page a...
  46. Please see this thread:...

    Please see this thread: T4-0-Memory-trying-to-make-sense-of-the-different-regions

    There is 1024 KB of RAM in a T4 - but it is segmented into TWO discrete 512KB areas. Linked thread hopefully...
  47. Post #3 shows expected sensible results - NO...

    Post #3 shows expected sensible results - NO PROBLEM after all ? - the lines and '|' separator show the newline placement and where 64 byte expected buffer shows up.

    >> post #1 && #2 with the...
  48. WITH A TWIST??? - written as a NULL term c string...

    WITH A TWIST??? - written as a NULL term c string and not a STRING:


    char szH[400];
    uint32_t ii=0;
    void setup() {
    Serial.begin(38400);
    }

    void serialEvent() {
  49. Tried that code here and it works - given...

    Tried that code here and it works - given "1234567890a1234567890b1234567890c1234567890d1234567890e1234567890f1234567890g1234567890h"

    That is 8 sets of 10 digits and 8 letters - for 88 character...
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    Maybe my router caught on and is protecting me? ...

    Maybe my router caught on and is protecting me?

    I can't find an available FLOOD tool.

    I set up Win Ubuntu and it gave this:


    Says USER - I forget my SUDO pwd :(
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