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

Search:

Type: Posts; User: ecurtz

Search: Search took 0.00 seconds.

  1. I'm doing something similar here (sorry it's kind...

    I'm doing something similar here (sorry it's kind of ugly test code): https://forum.pjrc.com/threads/57211-Teensy-4-DMA-to-LPUART
  2. Paul said in one of the 4.0 threads that it was...

    Paul said in one of the 4.0 threads that it was too early to talk about potential future designs, but it appears to be a popular request.
  3. Replies
    2
    Views
    119

    Awesome, Thanks. Any opinion on the more...

    Awesome, Thanks.

    Any opinion on the more general question of how you'd like us to report issues with the libraries?
  4. Replies
    2
    Views
    119

    "Right" way to submit bug reports

    This seems like a pretty basic question, but I can't find it stated anywhere. What's the preferred way to submit bug reports in the Teensy libraries? A thread here? An issue report on GitHub? A pull...
  5. Replies
    4,338
    Views
    461,515

    There are some errors in the DMAMUX_SOURCE values...

    There are some errors in the DMAMUX_SOURCE values in imxrt.h

    The RX and TX are reversed at least for DMAMUX_SOURCE_LPUART6 and probably others.

    Here's my thread about trying to get DMA to UART...
  6. Replies
    1
    Views
    156

    Looks like some of the DMAMUX_SOURCE definitions...

    Looks like some of the DMAMUX_SOURCE definitions in imxrt.h are wrong. I'll report it as a bug.

    imxrt.h source
  7. Replies
    1
    Views
    156

    Teensy 4 DMA to LPUART?

    Has anyone done any serial DMA yet? I'm trying to update a working piece of 3.2 code that dumps data to serial using DMA and I'm not having any luck so far on the 4.0. It doesn't go into my DMA...
  8. It's a little annoying, but you can look up the...

    It's a little annoying, but you can look up the pin ports and indices in the Teensy 4 library files.
    core_pins.h on GitHub

    A few people in the beta thread have been doing DMA stuff, but I haven't...
  9. Replies
    4,338
    Views
    461,515

    I was thinking for the background color, not the...

    I was thinking for the background color, not the text. i.e. the light gray background would be pink (or current light gray with a pink stripe?) to indicate the PWM capable digital pins and then the...
  10. Replies
    4,338
    Views
    461,515

    What about just using the PWM color instead of...

    What about just using the PWM color instead of gray on the pin numbers that support PWM and removing the label entirely?
  11. Replies
    4,338
    Views
    461,515

    On reading the actual reference manual and not...

    On reading the actual reference manual and not just the product sheet the scaling and rotation hardware appears less capable than I hoped, and probably not worth dealing with unless you also had...
  12. Replies
    4,338
    Views
    461,515

    I didn't find anything with the thread search,...

    I didn't find anything with the thread search, but has anyone in the beta group tried anything with the Pixel Pipeline hardware? It seems like it has the hardware for a SNES/GBA style hardware...
  13. Replies
    14
    Views
    1,957

    You could always use a matrix for your input...

    You could always use a matrix for your input buttons. Either 6x6 driven directly by the Teensy or a single 8bit serial to parallel chip for the driver side and 4 inputs for the read.
  14. Replies
    7
    Views
    1,382

    The SmartMatrix...

    The SmartMatrix library is as good as you're going to do for those panels. It uses chained DMA transfers to fill the data and address lines. I'm not shocked to hear you're having stuttering trying to...
  15. Replies
    7
    Views
    1,382

    I have example code for generating DMD signals...

    I have example code for generating DMD signals mimicking various pinball platforms up on GitHub. These were for debugging and aren't at all efficient, but might help as a proof of concept. You'll...
  16. I've never used this product, but presumably if...

    I've never used this product, but presumably if you want to talk to the screen you want OLEDCS.
  17. https://learn.adafruit.com/adafruit-1-5-color-oled...

    https://learn.adafruit.com/adafruit-1-5-color-oled-breakout-board/wiring-and-test
  18. Caveat: Everything I "know" about this I learned...

    Caveat: Everything I "know" about this I learned last week from the internet.

    The short answer is you probably don't need to worry about it. Those vias might be an issue, but I'm not clear on...
  19. Replies
    3
    Views
    1,197

    I actually wondered about that, but from my...

    I actually wondered about that, but from my fairly ignorant viewpoint that seemed worse than losing some analog pins and adding a very short trace on the bottom of the board. Maybe if I finish it and...
  20. Replies
    3
    Views
    1,197

    MKL04 Pin Ordering

    This is more curiosity than a feature request, but is there some reason for the specific MKL04 pins being used? It almost seems like the order is capriciously chosen to make it annoying to route...
  21. Replies
    559
    Views
    199,878

    It may have been mentioned earlier in the thread,...

    It may have been mentioned earlier in the thread, but have you considered adding one (or more?) additional rows of outside pins to the short "end" of the board. That seems much easier to deal with...
  22. This is already what happens - if you look at the...

    This is already what happens - if you look at the code in attachInterrupt() here https://github.com/PaulStoffregen/cores/blob/master/teensy3/pins_teensy.c you'll see that there's one actual interrupt...
  23. Replies
    0
    Views
    476

    Relative order of pin changes on port

    I have a case where I'd like to essentially latch a value from one pin on the edge of another pin on the same port, and reading the pin in my interrupt isn't fast enough to reliably capture the...
  24. Replies
    53
    Views
    50,474

    The SPI section of the reference manual uses SIN...

    The SPI section of the reference manual uses SIN and SOUT, but DIN and DOUT is better if that's what the reference card uses.
  25. Replies
    53
    Views
    50,474

    Thanks for making and maintaining these! One...

    Thanks for making and maintaining these!

    One thing I noticed was that as discussed in the recent thread about master/slave SPI, MOSI and MISO don't exist on the Teensy3 and these should probably...
  26. Replies
    13
    Views
    2,883

    Nope, HWGuy is correct. MOSI and MISO don't...

    Nope, HWGuy is correct. MOSI and MISO don't appear anywhere in the chip reference, it only refers to SIN and SOUT, and I'm using pin 12 for slave input (although not "proper" SPI) in my current...
  27. Replies
    8
    Views
    1,460

    Unless this is purely for educational purposes...

    Unless this is purely for educational purposes you should probably just look at the SmartMatrix code: https://github.com/pixelmatix/SmartMatrix
  28. Can you actually buy it from any of those...

    Can you actually buy it from any of those retailers for $5? I've only seen game console style bundles where they throw in some garbage at retail price forcing you to buy the package for several times...
  29. Replies
    12
    Views
    4,442

    There's a search on the Shared Projects page at...

    There's a search on the Shared Projects page at OSHPark: https://oshpark.com/shared_projects

    Currently 90 results searching for "Teensy".
  30. Replies
    16
    Views
    5,378

    What about: FASTRUN static void...

    What about:


    FASTRUN static void clocking(void) {
    uint32_t toggle = GPIOD_PDOR;
    begin:
    toggle ^= 0xFFFFFFFF;
    GPIOD_PDOR = toggle;
    goto begin;
    }
  31. Replies
    16
    Views
    5,378

    Seems like it could be branching to 1fff8764...

    Seems like it could be branching to 1fff8764 instead of 1fff8762, did you see what the compiler produced on its own if you just flip the local and set GPIOD_PDOR?
  32. Replies
    7
    Views
    1,038

    Are the newer 3.0+ boards support by the Windows...

    Are the newer 3.0+ boards support by the Windows command line tool? Sorry to ask, but I don't have a Windows machine to test and the information page makes it sound like they aren't.
  33. Replies
    12
    Views
    2,887

    If I manually hold _SS high until SPI is started...

    If I manually hold _SS high until SPI is started up I seem to get clean frames until I deliberately mess with the signal to throw it off, however I wouldn't want to count on that in cases where a...
  34. Replies
    12
    Views
    2,887

    I actually have what's basically an end of frame...

    I actually have what's basically an end of frame signal, so I'm just using that for _SS right now but when I get the chance I'll try controlling it from another pin on the slave device and just doing...
  35. Replies
    12
    Views
    2,887

    I've been working on SPI slave stuff using...

    I've been working on SPI slave stuff using btmcmahan's library and as far as I can tell the only way that it's possible to get the slave FIFO in sync with the external master is if you actually...
Results 1 to 35 of 35