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  1. You might try updating the SPI files that were...

    You might try updating the SPI files that were installed, with the ones that are currently waiting on a Pull Request.
    https://github.com/KurtE/SPI/tree/T4_OLD_APIS

    This fixed some other similar...
  2. @mjs513 and others, have a fix for DMA on T3.6,...

    @mjs513 and others, have a fix for DMA on T3.6, which I pushed up to @mjs513 fork/branch, will now migrate back to my main branch that is in the current active PR to the master project.

    Appears to...
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    As mentioned looks interesting. A few days ago I...

    As mentioned looks interesting. A few days ago I started playing with some ideas for a castellated setup. At the time I was think two different ones. One for front and one for rear.
    But did not...
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    I know there are a lot of EE types who understand...

    I know there are a lot of EE types who understand a lot more about the stuff like cross talk and the like. And I know some of my own boards have probably lots of issues.

    So take this for what it...
  5. @mjs513 and others, Looks like the DMA stuff...

    @mjs513 and others,

    Looks like the DMA stuff on T3.6 is not working (regardless if hardware CS on DC or not...)

    Looks like having the DMASettings as part of the class structure is not working. ...
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    Wondering, has anyone had success reading an...

    Wondering, has anyone had success reading an SDCard yet? I assume so, but if I had mine hooked up, the next thing I would check would be to ring out Which pins go where.

    That is my first layout...
  7. @UHF - You might try the files mentioned in my...

    @UHF - You might try the files mentioned in my github in posting #5. It should work OK for your pins.

    After the last posting, I also made a few more improvements for it. In particular now if it...
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    @... SDCard Can not test it on mine, as I...

    @...

    SDCard

    Can not test it on mine, as I sort of killed that flex cable...

    @loglow - As mentioned the TPD chip that was on the breakout boards is a little easier for old eyes to work...
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    Hi @defragster and @Paul - If I remember...

    Hi @defragster and @Paul - If I remember correctly the USB DN/DP pins don't go negative. They simply have to have a differential of voltage between the two pins.

    Example in the web page:...
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    Update to previous post, where I showed the...

    Update to previous post, where I showed the bottom pads that were either the pads were ripped off or parts of flex cable still sort of there.

    I did quickly just put some solder over the USB pads,...
  11. @UHF @mjs513 @PaulStoffregen @MichaelMeissner ...

    @UHF @mjs513 @PaulStoffregen @MichaelMeissner

    I put in a fix in two different branches.

    The first one is in a branch that I already have an outstanding Pull Request to fix some DMA issues...
  12. @UHF I will take a look - For the most part I did...

    @UHF I will take a look - For the most part I did not even look at or I thought touch how the bit bang versions of the library worked. And in actuality wondered if it should be removed, as you could...
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    Yep - they are sort of cryptic, which is why I...

    Yep - they are sort of cryptic, which is why I pointed you back to PDF file for where the bits are defined and a sort of chart showing you how all of the clocks relate to each other...

    And I know...
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    You might try adding: asm("dsb"); To the end of...

    You might try adding: asm("dsb");
    To the end of your ISR...

    void rotaryEncoder()
    {
    currentInterrupt = millis();
    if (currentInterrupt - lastInterrupt < 5)
    return;

    if...
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    Actually I am not clear from the original...

    Actually I am not clear from the original description, if you downloaded the Teensy loader CLI app or you downloaded Teensyduino?

    As for the CLI app, there have been a few threads about this...
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    It is a little more complicated than that... ...

    It is a little more complicated than that...

    The SPI buss speed can be based off of 4 different clocks and have an initial divider set. This part is controlled by the CBCMR register.
    Not sure...
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    @defragster - As usual you do a far better and...

    @defragster - As usual you do a far better and thorough testing than I have been able (and most of the time willing) to do!

    Great stuff..

    EDIT: FYI - as I mentioned I will see if I can solder...
  18. Hi @mjs513 - Since I already mucked with...

    Hi @mjs513 - Since I already mucked with ILI9341_t3n and ST7735_t3,

    Redid it for ILI9341_t3 - Note: The unadulterated version of graphictest builds without error. However if I edit the start of...
  19. Hi @mjs513 - I tried compiling the current...

    Hi @mjs513 - I tried compiling the current graphic test in the project and it appears to fail in the link phase...

    Linking everything together......
  20. Thread: SPI on Teensy 4

    by KurtE
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    I updated the T4 support for SPI, so now ...

    I updated the T4 support for SPI, so now
    SPI.begin internally at the end will call beginTransaction(SPISettings()); endTranaction();
    So things like the transfer data size and clock settings and......
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    Yes - if I understand what you are saying. If...

    Yes - if I understand what you are saying. If you are just hanging there queuing messages and always spining on that wait, then yes each message will go out about 3ms after you queued it... Assuming...
  22. Thread: SPI on Teensy 4

    by KurtE
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    @connectivity - Confirmed it dies, will debug. ...

    @connectivity - Confirmed it dies, will debug.

    In the mean time you can get it up and running, if you add a couple lines of code...


    void QEC_Configure(void)
    {
    SPI.begin();

    delay(5);
  23. @mjs513 - Go for it... The only interesting...

    @mjs513 - Go for it...

    The only interesting thing will be how is our compatibility with previous versions?
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    I have not worked on this part of the USB Code at...

    I have not worked on this part of the USB Code at all, only some on the USB Host code for T3.6 and T4, so take this with a grain of salt...
    There is some information up in the PDF associated with...
  25. Thread: Bum 3.6?

    by KurtE
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    Sorry, I did not answer figuring, you covered...

    Sorry,

    I did not answer figuring, you covered most of the standard things I would suggest, like, verifying that you have 3.3v. No shorts...

    Suggest the 15 second reset. Try the hold program...
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    Again it depends... If for example you have a .c...

    Again it depends... If for example you have a .c or .cpp file that simply includes: FreeSans12pt7b.h
    This file starts off like:

    const uint8_t FreeSans12pt7bBitmaps[] PROGMEM = {
    0xFF, 0xFF,...
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    @dkryder - I am not an expert here, but here is...

    @dkryder - I am not an expert here, but here is my two cents. You can probably hook up the USB pads of the T4 to his external D+/D- pins to get the USB to work.

    However I am pretty sure using a...
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    @loglow (and others) - Again it will be...

    @loglow (and others) - Again it will be interesting to try again. I am still undecided if I feel like the current flex cable is more or less easy to install and or error prone as compared to using...
  29. Wonder if you built a version with Joystick and...

    Wonder if you built a version with Joystick and RawHid if that would work, then debug could still go through Serial.print type code...
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    Hard to say without providing any additional...

    Hard to say without providing any additional information. Like simple sketch that shows the issue. I am assuming MAC from your error message.
    Like what libraries are used. Does the compiler...
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    Hi @Gremlin and @mjs513 and @PaulStoffregen - I...

    Hi @Gremlin and @mjs513 and @PaulStoffregen - I am hoping that we find a good place to host some of these display driver updates.

    Currently a few of us have been playing around with them and...
  32. @Paul @pramilo and ... Thought I would try to...

    @Paul @pramilo and ...

    Thought I would try to fill in more of the info from that last Logic Trace I showed above, Here is another one taken showing the whole set of messages.
    17606

    Again as...
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    Let me know if you have something to play with. ...

    Let me know if you have something to play with. This is another area I thought would be good to have support for in the usb host code....

    @WMXZ - maybe, again not sure if they exist, and which...
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    @loglow - As @defragster mentioned, have a good...

    @loglow - As @defragster mentioned, have a good safe trip...

    Again would like to try out the newer setup, I probably need whole new everything (I do have more T4s...)

    It will be interesting...
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    Also it appears like I can no longer select and...

    Also it appears like I can no longer select and copy text in the Terminal Monitor when the cable is unplugged.
    1.8.10, Windows 10 64 bit.
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    Or Maybe just plug a WIFI dongle into a USB port?

    Or Maybe just plug a WIFI dongle into a USB port?
  37. @PaulStoffregen and @pramilo - Quick update. ...

    @PaulStoffregen and @pramilo - Quick update.

    I am running two Arduino sketches: One more or less the same as @pramilo posted:
    Again nothing special, only main differences is larger...
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    Sorry I have no idea about Julia and how it...

    Sorry I have no idea about Julia and how it works. I know on Linux when I am talking to some of these Serial devices, my C code will use the termios library code to turn off some of the special...
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    It is really nothing special. Defragster has...

    It is really nothing special. Defragster has updated it slightly to allow + and - to increment/decrement.

    My current allows you to type in pin number, and just hitting enter again increments...
    ...
  40. @zapta - Libraries - ST7735_t3 library is...

    @zapta - Libraries - ST7735_t3 library is installed with Teensyduino. Not sure if we have released a new version of Teensduino since Paul took in my previous PR, which added support for running the...
  41. @pramilo - Agreed, again had similar issues back...

    @pramilo - Agreed, again had similar issues back using Trossen Robotics Arbotix boards (AVR Atmega644p).... But as mentioned decided to go with the 5v to be driving the servos as the documented...
  42. @pramilo - Yes mostly before I used the loops...

    @pramilo - Yes mostly before I used the loops stuff as well. But then wondered if maybe some of the issues with AX-12 servos losing their ID was due to 3.3v TTL instead of 5v, so started adding...
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    @mjs513 - Yep I was/am using normal size headers...

    @mjs513 - Yep I was/am using normal size headers and even then I am not sure it gets down completely flush...

    Also with those SMD connectors, on a different board, I soldered one on and it was...
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    @mjs513 - Yikes Wonder what hit it this time? The...

    @mjs513 - Yikes Wonder what hit it this time? The bottom SMT connector?

    I know you do all of the normal things, so I know this is all probably not helpful, but just in case... like check for...
  45. I too am just a paying customer. Who happens to...

    I too am just a paying customer. Who happens to be a retired software developer and likes the Teensy platform and the user base, so I spend a some time and money helping supporting it.

    I will...
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    @mjs513 and @DerekR and ... @tallDog - I think I...

    @mjs513 and @DerekR and ... @tallDog - I think I screwed up same way ... I waited for it to be dry... after cleaning... And teensy does not respond... I think I may have been just enough unaligned...
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    @luni - I am no expert in this, but google...

    @luni - I am no expert in this, but google exidx-start finds: https://stackoverflow.com/questions/9752000/exidx-start-and-exidx-end-what-do-they-do
    Sounds like they are used for exception handling ...
  48. Glad you got it working hardware wise... ...

    Glad you got it working hardware wise...

    Note: I actually thought some about the stale condition you mentioned, but actually more worried the other way around.

    That is in the output function:...
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    Thanks, I went ahead and ordered some from...

    Thanks, I went ahead and ordered some from BuyDisplay...

    And: being a gluten for punishment also ordered replacement board as I was already paying for shipping :lol:
  50. Question is, do you just want to know or do you...

    Question is, do you just want to know or do you want your sketch to know?

    If you just want to know, open up the Arduino IDE, go to the Help menu, and click on the About Arduino menu item.

    The...
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