Forum Rule: Always post complete source code & details to reproduce any issue!

Search:

Type: Posts; User: Frank B

Page 1 of 10 1 2 3 4

Search: Search took 0.04 seconds.

  1. Replies
    8
    Views
    88

    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...
  2. Replies
    8
    Views
    88

    fastCRC does various bit-widths in Hardware.

    fastCRC does various bit-widths in Hardware.
  3. Replies
    8
    Views
    121

    VBAT needs to be connected - it is unclear from...

    VBAT needs to be connected - it is unclear from your schematic if it has power.
  4. Replies
    3,341
    Views
    360,916

    @WMXZ: Yes, correct.

    @WMXZ:

    Yes, correct.
  5. Replies
    69
    Views
    19,327

    does not matter much. more important is they are...

    does not matter much. more important is they are NP0
  6. Replies
    3,341
    Views
    360,916

    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.
  7. Replies
    49
    Views
    12,264

    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...
  8. Replies
    49
    Views
    12,264

    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...
  9. if he upgraded from an old version - shouldn't...

    if he upgraded from an old version - shouldn't the file be already there?
  10. Replies
    3,341
    Views
    360,916

    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!
  11. Replies
    3,341
    Views
    360,916

    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...
  12. Replies
    3,341
    Views
    360,916

    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,...
  13. Replies
    9
    Views
    166

    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...
  14. Replies
    3,341
    Views
    360,916

    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..
  15. Replies
    3,341
    Views
    360,916

    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.
  16. Replies
    3,341
    Views
    360,916

    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...
  17. 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
    ...
  18. Replies
    32
    Views
    559

    ... and it might help to reboot the PC.

    ... and it might help to reboot the PC.
  19. Replies
    203
    Views
    48,907

    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...
  20. Replies
    203
    Views
    48,907

    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...
  21. 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!
  22. Replies
    3,341
    Views
    360,916

    Great, thanks :)

    Great, thanks :)
  23. 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.
  24. Thread: String issue..

    by Frank B
    Replies
    12
    Views
    205

    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...
  25. Replies
    4
    Views
    195

    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.
  26. Replies
    41
    Views
    14,534

    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...
  27. Replies
    3,341
    Views
    360,916

    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....
  28. Replies
    3,341
    Views
    360,916

    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.
  29. Replies
    2
    Views
    276

    As far as I know it is manufactured in the USA.

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

    The better way is to update the library...
  31. 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.
  32. for what??

    for what??
  33. just cut the trace.

    just cut the trace.
  34. Hm, that looks good (If the pins are soldered to...

    Hm, that looks good (If the pins are soldered to the Teensy, too)
    Is it reproducable? The first file works a while, the second distorted from beginning? If yes, may be an issue with the card , and...
  35. Often, this a bad or too long connection to the...

    Often, this a bad or too long connection to the Audioshield. Or you did not solder the pins.
    Can you post a photo?
  36. Replies
    2
    Views
    59

    For programming, and to start the new programm...

    For programming, and to start the new programm after that, a reset is needed.
  37. Replies
    3,341
    Views
    360,916

    Good news: I've ported the very complex...

    Good news:
    I've ported the very complex TeensyConvolutionSdr to Teensy4 - it uses all kinds of libraries and hardware - had NO problems. Uses 190KB ITCM, 250K DTCM - really a lot of code (>12K lines...
  38. Replies
    3,341
    Views
    360,916

    If you want to see the FlexRAM Mapping: ...

    If you want to see the FlexRAM Mapping:



    PROGMEM
    void flexRamInfo(void)
    {
    #if defined(__IMXRT1052__) || defined(__IMXRT1062__)
    int itcm = 0;
    int dtcm = 0;
  39. Replies
    3,341
    Views
    360,916

    was about to do a very similar aproach.. even...

    was about to do a very similar aproach.. even your lines

    _flexram_bank_config = 0xAAAAAAAA | ((1 << (_itcm_block_count * 2)) - 1);
    _itcm_block_count = (SIZEOF(.text) + 0x7FFE) >> 15; looked...
  40. Replies
    3,341
    Views
    360,916

    Tim, for the fixed 256k, 256k, 512k you can use...

    Tim,
    for the fixed 256k, 256k, 512k you can use this:


    void ResetHandler(void)
    {
    asm volatile("CPSID I");
    //SCB_MPU_CTRL = 0; // turn off MPU
    IOMUXC_GPR_GPR17 = 0xAAAAFFFF;
    ...
  41. Replies
    3,341
    Views
    360,916

    ...we can use a common linker file for all RAM...

    ...we can use a common linker file for all RAM configs :)


    MEMORY
    {
    ITCM (rwx): ORIGIN = 0x00000000, LENGTH = 512K
    DTCM (rwx): ORIGIN = 0x20000000, LENGTH = 512K
    RAM (rwx): ...
  42. Replies
    3,341
    Views
    360,916

    My fault was that 512KB are dedicated to OCRAM,...

    My fault was that 512KB are dedicated to OCRAM, so the RAM-BANK size is still 32KB.
    This works:
    noInterrupts();
    IOMUXC_GPR_GPR17 = 0xAAAAFFFF;
    IOMUXC_GPR_GPR16 |= (1<<2);
    interrupts();

    ...
  43. Replies
    3,341
    Views
    360,916

    @Paul, is it correct, that the size of a RAM Bank...

    @Paul, is it correct, that the size of a RAM Bank is 64KB on a 1062, and 32 KB on a 1052?
    So, doing this:

    noInterrupts();
    IOMUXC_GPR_GPR17 = 0x55AFFA55;
    IOMUXC_GPR_GPR16 |= (1<<2);...
  44. Replies
    3,341
    Views
    360,916

    Looks like i've managed to "brick" my T4B2. I...

    Looks like i've managed to "brick" my T4B2.
    I edited the imrtx1062.ld file to


    ITCM (rwx): ORIGIN = 0x00000000, LENGTH = 256K
    DTCM (rwx): ORIGIN = 0x20000000, LENGTH = 256K

    and...
  45. Replies
    3,341
    Views
    360,916

    that's not "a bit" it's equivalent to 27MHz....

    that's not "a bit"

    it's equivalent to 27MHz. How many UNOs are that? Assuming 8MHz/Uno, > 3 UNOs lost... Or do they use 16MHz? Dunno...

    Edit: yield has to become faster. way faster. and without...
  46. Replies
    3,341
    Views
    360,916

    @Paul, I have a very big application -...

    @Paul, I have a very big application - TeensyConvolutionSDR which needs more ITCM and more DTCM - any chance that you can inrease both? 256K for both would be fine, as a start..
  47. Replies
    3,341
    Views
    360,916

    @Kurt, the alternative is to not beeing able to...

    @Kurt, the alternative is to not beeing able to use alternate, higher (or lower) SPI frequencies. Is this wanted?

    @Paul: I do not intend to use CAN, and I have not a single board or chip to test...
  48. Replies
    3,341
    Views
    360,916

    @mjs: thanks :) any idea to make it more...

    @mjs: thanks :) any idea to make it more efficient?

    Thank you Tim.
    I'm not sure if it is useful for the RTC. It would, if there was a way to detect a "cold start" or fresh programming. I don't...
  49. Replies
    3,341
    Views
    360,916

    I've patched interrupt.c to allow...

    I've patched interrupt.c to allow attachInterrupt() with GPIO6..9
    Would be great if you test it? Any way to make it faster?
    https://github.com/PaulStoffregen/cores/pull/370
  50. Sometimes a reboot helps. In rare cases there...

    Sometimes a reboot helps. In rare cases there seem to be crashed tasks that block HID or serial.
Results 1 to 50 of 500
Page 1 of 10 1 2 3 4