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  1. I guess for me, and maybe a some others, I have...

    I guess for me, and maybe a some others, I have no idea what you mean by:

    What HAL (Hardware Abstraction Layer) libraries?

    Yes I know there some CHIP manufactures may define some form of HAL...
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    The last one I reported was using one of the...

    The last one I reported was using one of the white wire versions of the T4...

    I am pretty sure the: 16c0:0486 Van Ooijen Technische Informatica Teensyduino RawHID
    Is a normal value for Teensy......
  3. I know Paul has said it more than once. That the...

    I know Paul has said it more than once. That the programing manuals don't give you a lot of the information to really understand what is going on.

    So if you again look at the datasheet page he...
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    The SPI system for T4 is very different than it...

    The SPI system for T4 is very different than it is on the T3.x boards.

    With the T3.x the SPI buss registers had the register PUSHR which is 32 bits, of which the top 16 bits allows you to encode...
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    @Paul, @mjs513, @defragster - Not sure which...

    @Paul, @mjs513, @defragster - Not sure which thread to mention this again:
    UncanneyEys0 (earlier mjs513 version) -

    Thought I would try loading it again. And it built fine:

    Output from...
  6. @PaulStoffregen tried to answer the question...

    @PaulStoffregen tried to answer the question about T3.2... back in the Beta thread:
    https://forum.pjrc.com/threads/54711-Teensy-4-0-First-Beta-Test?p=211780&viewfull=1#post211780
  7. As per earlier request, I put my current version...

    As per earlier request, I put my current version of imxrt-size up on github: https://github.com/KurtE/imxrt-size
    I believe this includes the .exe for windows. Sorry I have not tried building a...
  8. T4.0 Memory - trying to make sense of the different regions

    While trying to debug some issues, where a program would cause USB to not work in cases, but did in others, I decided to try to understand more on the memory organization of new Teensy T4.0.
    I put...
  9. Thread: Teensy 4 dead

    by KurtE
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    Schematic is now up on main website:...

    Schematic is now up on main website: https://www.pjrc.com/teensy/schematic.html

    My guess is you already tried it, but make sure nothing but the USB is connected to it and then double check...
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    For what it is worth, here is a hacked up version...

    For what it is worth, here is a hacked up version of imxrt-size.c that I build in visual studio 2019...


    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>

    int printnumbers(unsigned...
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    @PaulStoffregen and others: Again More on...

    @PaulStoffregen and others:

    Again More on memory stuff... Maybe should move to new thread?

    But: I thought I would blindly add a third full size ILI9341 display image:

    Like the other two...
  12. @PaulStoffregen - can answer this a lot better...

    @PaulStoffregen - can answer this a lot better than I can...

    The Teensy Teensy 3.x and 4.0 and LC are all ARM based products, but the earlier Teensy 1 and 2.x were AVR based products.

    When a...
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    Again not sure if you will find this part...

    Again not sure if you will find this part interesting, but I took the sketch that displayed the front and back of the T4 card on an ILI9341 display (from DTCM memory), and added a dump at the start...
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    Sorry for endless information ;) But I wanted to...

    Sorry for endless information ;) But I wanted to make sure it was not just as simple as a large amount of data in DTCM... SO did a quick and dirty version of the ili9341_t3 pictureembed, with two...
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    To follow on with my comment earlier today: ...

    To follow on with my comment earlier today:


    In case there are others who also are unclear as I am/was about some of this and also trying to understand how these things are initialized, and...
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    At some point I should probably learn what do all...

    At some point I should probably learn what do all of these types of memory mean? i.e. what is the difference betwen ITCM and DTCM? Sometimes I hate 3 or 4 letter acronyms!

    I know that I can use...
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    Sticky: Yesterday I did find I do have two of those...

    Yesterday I did find I do have two of those displays(RA8875 from BuyDisplay.com) (one I never did get to work and the other sometimes...) I had the test apps working on T3.6 earlier, but so far...
  18. As mentioned, I have done a lot of the work...

    As mentioned, I have done a lot of the work lately on this, but the actual change to run up to 30mhz was done quite a long time ago, I believe that the last change was simply to move it from the .cpp...
  19. It works! Looks good!

    It works! Looks good!
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    Now it is sort of an interesting question/comment...

    Now it is sort of an interesting question/comment to myself (and others).

    Ok So I made a version of the Servo library that works for up to 24 servos... The question to myself is do I have...
  21. Sorry, I have not actually ever done any fonts......

    Sorry, I have not actually ever done any fonts... When I have needed them to play with, I either used the ones already in the library, or in some cases, Paul I think has a set of ili9341 fonts and...
  22. Looks like something that Paul will need to maybe...

    Looks like something that Paul will need to maybe answer fully.

    I am not an Audio person, but as there needs to be some adjustments in order to use the main Audio adapter, my guess is there may...
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    Sticky: That is the interesting question. Sometimes...

    That is the interesting question. Sometimes wonder if it would make more sense to try to enhance the Teensy support in Adafruit_GFX. Or more particular Adafruit_SPITFT.

    Can we for example have...
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    @PaulStoffregen and @wingman ... For the heck...

    @PaulStoffregen and @wingman ...

    For the heck of it, I did make a version of Servo library for the T4, that does support up to 24 servos. It just felt right as well there are 24 easy to access...
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    Sticky: I wonder at times what is the best course of...

    I wonder at times what is the best course of action with Github projects like RA8875 library, where the owner of the library (Like Sumotoy) is no longer active.

    I had/have a Spin version I did...
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    It would be interesting to try your method out......

    It would be interesting to try your method out... I am building some of my own boards, which are a pain with those ribbon cables...

    As for putting it through it's paces, I do still have lots of...
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    Hi @Paul and @wingman... I could sort of read...

    Hi @Paul and @wingman...

    I could sort of read between the lines of the question. As I knew he was referencing my OLD stuff, which is why I answered, that I have not looked at the stuff for...
  28. Oops looks like I may have copied the wrong file...

    Oops looks like I may have copied the wrong file into my foo program. The sizes are different:

    Lower_Buffer: 2000112c
    upper_buffer: 20200000
    stack buffer: 20077fd0
    Heap Buffer: 20200028...
  29. @mjs513 - Yep I had done that as well. I also...

    @mjs513 - Yep I had done that as well. I also updated one structure in the main .ino file as well.

    I am also curious about the actual sizes that was crashing... So for example if I build one of...
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    @PaullStoffregen updated the Servo library for T4...

    @PaullStoffregen updated the Servo library for T4 to use an IntervalTimer,

    I don't remember how many of these Interval Timers the T4 supports, but I am pretty sure more than one...

    So yes...
  31. @mjs513 - Thanks Making them Non-static would...

    @mjs513 - Thanks
    Making them Non-static would imply that they are now on the stack and as such get initialized back to their original values each time...

    Making all of those data members to be...
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    @Wingman - I have not played around with RC...

    @Wingman - I have not played around with RC servos for a long time (also in a partial answer to your PM on Trossen)

    Looking that the Teensy 4 First Beta Test thread - It looks like the servo...
  33. Quick update: If I change all of those defines to...

    Quick update: If I change all of those defines to be: PROGRMEM like:

    const uint16_t sclera[SCLERA_HEIGHT][SCLERA_WIDTH] PROGMEM = {


    Then the output on T4 does change to:

    Lower_Buffer:...
  34. UncannyEyes Hints on maybe why not working...

    UncannyEyes Hints on maybe why not working correctly on T4???

    I think the USB not working a lot of the time and the like is probably due to differences on how memory is allocated/used on T4. In...
  35. I am not an expert on some of this, but, there...

    I am not an expert on some of this, but, there are some interesting differences between different types of memory. Some of this I put up in the thread: ...
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    Looking at the Teensy Beta thread: There are two...

    Looking at the Teensy Beta thread: There are two main summary postings #4 and #6 on what things that have been tested/fixed... ...
  37. Have other stuff going on today as well... ...

    Have other stuff going on today as well...

    Been playing arround with the uncanny eyes with one display on SPI and the other on SPI1... Plus trying to use the DMA code to update both eyes at same...
  38. Not sure if what you have is working now or not? ...

    Not sure if what you have is working now or not?

    I did the conversion to get it to run on the T4, which has worked for me. Will try yours later. You might change the ili9341_t3 library and...
  39. Probably the parameters are wrong to writeRect, I...

    Probably the parameters are wrong to writeRect, I am guessing you need:
    tft.writeRect(0, row, w, 1, bmpColors);
  40. @mjs513, @Erik_ I understand some of the...

    @mjs513, @Erik_

    I understand some of the issues with the spittftbitmap here, but I really don't know how to fix the specific way this test app is written with the current code.

    That is, with...
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    Forgot to mention the really bad hangs before,...

    Forgot to mention the really bad hangs before, was more like things did not link correctly or maybe load...
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    Note, the version of this sketch that was locking...

    Note, the version of this sketch that was locking up the device was not using dma, or at least not in display code...

    Yesterday I did make some progress on getting dma to work, but now issue is...
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    Thanks @Nominal Animal - Yes have tried that and...

    Thanks @Nominal Animal - Yes have tried that and the like. Note: The functions actually do get back to the memory alignment. Doing the extra allocation does remove having to do one more iteration...
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    Note: since that time, I have tried several...

    Note: since that time, I have tried several places to flush or delete the cache and the DMA operation does not get beyond the first DMA output... I am not sure yet if it did the second buffer or not...
  45. Often times it is hard to know without actually...

    Often times it is hard to know without actually seeing the sources and the like. It is probably simply that these defines are needed for T4 are not included in the header files that your class is...
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    At one point, there was a new 3d printer board...

    At one point, there was a new 3d printer board made with a Teensy 3.1 that went into a printerbot Simple. Note: since then printrbot has gone out of business.

    But you might want to take a look...
  47. The error you show here has to do with SDFat not...

    The error you show here has to do with SDFat not with ILI9341_t3n or SPIN?
  48. Some of the libraries I have mentioned:...

    Some of the libraries I have mentioned:
    ILI9341_t3n: https://github.com/KurtE/ILI9341_t3n
    needs: SPIN: https://github.com/KurtE/SPIN

    ST7735_t3: There is a version that shipped with the current...
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    T4 DMA and Memory - DMAMEM and malloc/new

    Sorry, I know that I have brought some of this up a few times during the beta thread, but still running into issues, that I am trying to figure out how best to solve.

    Probably the most recent and...
  50. Again you may want to take closer look at the...

    Again you may want to take closer look at the code and at the different registers and the like>

    I do not believe that they support Bitbanding however, Each of these Pots I believe have a PORTSET...
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