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    We don't have your hardware. Try to make a...

    We don't have your hardware. Try to make a smaller testprogram without dependencies to external hardware.
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    Great! Pete, shall we try to add your CRC, too?

    Great!

    Pete, shall we try to add your CRC, too?
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    Ok, I have added it as "eloran" (not documented...

    Ok, I have added it as "eloran" (not documented so far) - please test it, when you have time :)
    crc = CRC14.eloran(buf, sizeof(buf));

    Please download the new version.
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    ...and it would be useful to know what...

    ...and it would be useful to know what speed-requirements you have.. often, it makes sense to tell more about a project if help is wanted.
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    Ok, it's too late here. The code is: ...

    Ok, it's too late here.
    The code is:


    uint16_t FastCRC14::bill(const uint8_t *data,const uint16_t datalen)
    {
    // poly=0x60b1 init=0x0000 refin=false refout=false xorout=0x0000 check=0x38d1
    ...
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    Does this CRC have special name? Or, what name...

    Does this CRC have special name? Or, what name do you suggest for the method in the library?
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    TelephoneBill...

    TelephoneBill
    : I have it working - i Think - it is return generic(0x60b1, 0x0, CRC_FLAG_NOREFLECT , data, datalen); and shifting the result >>2
    Do you have a second...
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    Like all other CRC, it just uses the Hardware -...

    Like all other CRC, it just uses the Hardware - CRC in the 32Bit mode and just shifts the polynom accordingly. This works for all other methods, too, even 7 Bits.
    But, ok, there may be some details...
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    For me, the descriptions on the card look good -...

    For me, the descriptions on the card look good - would be good if the others take a look, too :)
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    Maybe it is still using the old version which...

    Maybe it is still using the old version which comes with Teensyduino.
    - So, its best to delete the default version - it is in Arduino\hardware\teensy\avr\libraries

    - If it does not exist, Create...
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    #include FastCRC14 CRC14; ...

    #include <FastCRC.h>

    FastCRC14 CRC14;

    //Teststring - result for CRC DARC is 0x082d
    uint8_t buf[9] = {'1','2','3','4','5','6','7','8','9'};

    void setup() {
    uint32_t crc;
    delay(1500);
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    Sticky: https://forum.pjrc.com/threads/54711-Teensy-4-0-Fi...

    https://forum.pjrc.com/threads/54711-Teensy-4-0-First-Beta-Test?p=208594&viewfull=1#post208594

    Teensy 4 - Testpads, testing, fixture
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    Which signals are on the round testpads between...

    Which signals are on the round testpads between 24-33?
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    Maybelike this (border + arrows): 16822 ...

    Maybelike this (border + arrows):

    16822

    (Attachment not visible as picture ?? Bug in forum-software?)
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    Maybe there is an arrow missing - it's not 100%...

    Maybe there is an arrow missing - it's not 100% clear where the pins 24-33 are - or it's just because the green area is a bit misleading at the moment(?) and it will be more clear with the real photo
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    fastCRC with CRC-14/DARC (Teensy only) here:...

    fastCRC with CRC-14/DARC (Teensy only) here: https://github.com/FrankBoesing/FastCRC
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    I have CRC-14/DARC working - turned out to be...

    I have CRC-14/DARC working - turned out to be easy, only the bitshifts for polynom and seed need to be adjusted for CRC-14:

    (in fastCRC, it will look like this - other code similar to crc-16)

    ...
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    if you tell me the name and the parameters (like...

    if you tell me the name and the parameters (like "width=14 poly=0x0805 init=0x0000 refin=true refout=true xorout=0x0000 check=0x082d residue=0x0000 name="CRC-14/DARC") I can try it - ( not...
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    fastCRC does various bit-widths in Hardware.

    fastCRC does various bit-widths in Hardware.
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    VBAT needs to be connected - it is unclear from...

    VBAT needs to be connected - it is unclear from your schematic if it has power.
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    @WMXZ: Yes, correct.

    @WMXZ:

    Yes, correct.
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    does not matter much. more important is they are...

    does not matter much. more important is they are NP0
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    What did you pay for the shield? Got my T4...

    What did you pay for the shield?

    Got my T4 with ribbon today.. looks fantastic. The Raspberry heat sink I found still fits - great.
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    Yes, I've spent much more money for useless...

    Yes, I've spent much more money for useless things ... such is life. The 3.5 additional RAM is a bonus, for free. It was found by a user of this forum. Don't you like it?
    The 3.6 is faster, so, it's...
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    Yeah, it's all a matter of handling / care. ...

    Yeah, it's all a matter of handling / care.

    Look at it this way:

    If you want to blame hardware for your mistakes, or think it would be a problem with the hardware if you expose it to conditions...
  26. if he upgraded from an old version - shouldn't...

    if he upgraded from an old version - shouldn't the file be already there?
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    You could just offer a PDF with a third page for...

    You could just offer a PDF with a third page for xbar and flexio.

    The card looks great!
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    With the "new" variable size of ITCM DTCM my...

    With the "new" variable size of ITCM <-> DTCM my old imxrt-size is not correct anymore and needs a fix.

    There is an issue with line-endings too, and I tried colors. The Arduino-builder does...
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    It is a good idea to put all code that runs only...

    It is a good idea to put all code that runs only once or where speed does not matter in PROGMEM if you want as much free ram as possible.
    I'd check all libraries and their init-code, too.
    And now,...
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    The 3.6 is definitely not a good start. I would...

    The 3.6 is definitely not a good start. I would really choose something much simpler as first design. I don't want to discourage you, but I'm pretty sure that it won't work....

    Maybe it makes more...
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    I have some PSRAMs, but did not do much with...

    I have some PSRAMs, but did not do much with them, so far. I think that's one of the next things I'll do. Still not sure which pins to use for the (quad-) I/O..
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    perhaps add a function to reconfigure the cache...

    perhaps add a function to reconfigure the cache of ocram to "write-through" and "disabled"- it will be useful for debugging or help users to solve cache-issues.
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    Paul, I don't remember that I added this to the...

    Paul, I don't remember that I added this to the list. And I don't think that it was me :) But yes, it can be removed from the list.

    But - there was an (other) issue with PROGMEM - if code and...
  34. Sorry to say, but this thread is an attempt to...

    Sorry to say, but this thread is an attempt to spam, maybe later. The question is copied from here: https://stackoverflow.com/questions/27251754/teensy-to-imitate-a-usb-bulk-data-transfer/27443813
    ...
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    ... and it might help to reboot the PC.

    ... and it might help to reboot the PC.
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    Frank, i tried RFSIM99 instead (I tried elsie but...

    Frank, i tried RFSIM99 instead (I tried elsie but was not able to use it correctly) - and more important - the exact parts. You can see the parameters if you enter the inductor- partnumber in...
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    Hello, I'm about to make a circuit board for the...

    Hello, I'm about to make a circuit board for the SDR.
    During my research I discovered this preselector, which I like because it doesn't use relays, doesn't need adjustment, and only uses SMD...
  38. Serialx.end() does nothing if begin() was never...

    Serialx.end() does nothing if begin() was never called - so yes, please post a short example code!
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    Great, thanks :)

    Great, thanks :)
  40. Usually, this is a) a bad sd card (try a fresh...

    Usually, this is a) a bad sd card (try a fresh one or reformat with the official format utility) or b) a problem with the hardware- unreliable connections, or too long.
  41. Thread: String issue..

    by Frank B
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    Or just the linker file. Jim, can you post the...

    Or just the linker file. Jim, can you post the one for Adafruit Feather ?
    On the other hand, it's very weird to edit the linker file to fix a self-made bug... and why don't the use the flash for...
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    Depends.... :-) We don't know what you are...

    Depends....
    :-)

    We don't know what you are planning to do with your pins. There is no general "best" way. Esp. if you want high speeds, things can become difficult quickly.
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    A single byte is only 255 combinations.. this is...

    A single byte is only 255 combinations.. this is why all unique IDs are using more than one byte...
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    Java exceptions: I got these often in the last...

    Java exceptions:
    I got these often in the last days - with a program that does only (USB-)print a few lines at startup, and after that, nothing. The execptions occured when compling the new program....
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    Not sure if it is an issue, but every time after...

    Not sure if it is an issue, but every time after installing a new Teensyduino version, it switches to Teensy 3.6 as default, which is a bit confusing :)

    The USB updates work quite well.
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    As far as I know it is manufactured in the USA.

    As far as I know it is manufactured in the USA.
  47. The better way is to update the library...

    The better way is to update the library...
  48. As far as I know the USB protocol itself does CRC...

    As far as I know the USB protocol itself does CRC Checks. No need for a additional CRC, at least for the packets.
  49. for what??

    for what??
  50. just cut the trace.

    just cut the trace.
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