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  1. Replies
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    Four second wait allows for a couple things - but...

    Four second wait allows for a couple things - but that code will leave the while() and continue as soon as Serial is online whether under 1 second or up to 4 seconds - at 4 seconds it leaves even if...
  2. It is a library installed with TeensyDuino See...

    It is a library installed with TeensyDuino

    See the install directory for :: ...\hardware\teensy\avr\libraries\Encoder\Encoder.h
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    re p#42 - sorry inexact language - just trying to...

    re p#42 - sorry inexact language - just trying to follow the concept ...

    Assumed mainline T_4.x's would not be changed to use this HAB overhead?
    >> If so can the DMAMEM be repurposed...
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    It is running and complete before the computer...

    It is running and complete before the computer has USB Serial connected to display the prints.
    Also the printing is going faster than the PC can make sense of.



    const int graph_size=10000;
    ...
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    See the PDF linked in this post ::...

    See the PDF linked in this post :: DOOM-running-on-the-Teensy-4-1-with-VGA-output


    NOTE: GPIO marked as #1 become #6 after startup code switched GPIO to FAST mode on 1062
  6. Can only suggest anecdotally ... it seems the...

    Can only suggest anecdotally ... it seems the Teensy will get the same info as the PC - hub or not - if the Teensy asks for or records it.

    Might show something looking in CORES code for the MIDI...
  7. If it works from PC, then the info is findable -...

    If it works from PC, then the info is findable - either from midi connect - or from Serial connect finding the Serial number for the device and then doing midi using that 'port' device? KurtE was...
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    If the HAB boot code can be overwritten - the...

    If the HAB boot code can be overwritten - the chip will still only boot from code matching the embedded encryption keys? The fuses enforce that against the internal stored keys right? If the user...
  9. The T_4.0 will always put the Serial# in the...

    The T_4.0 will always put the Serial# in the descriptor AFAIK - maybe the USBHost code doesn't parse that out as written - unless the midi doesn't pass that like Serial always does?
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    Faster QSPI speed can't hurt when used (if chips...

    Faster QSPI speed can't hurt when used (if chips likes it) ... indeed lower DTCM RAM runs at CPU speed, upper malloc/DMAMEM runs at CPU/4 so that can make a big difference when it doesn't run through...
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    Always assumed the bootloader MCU controlled the...

    Always assumed the bootloader MCU controlled the target and pushed HalKay to RAM to run and perform the code loading to target flash - as noted given it controls the JTAG pins.

    If so then when HAB...
  12. T_4.1 with PSRAM soldered to underside does not...

    T_4.1 with PSRAM soldered to underside does not use any 'edge' pins like D34-37 or other? Those pins for bottom chip pads are unique, shown here on this PDF by KurtE...
  13. Perhaps run an example to see it work. Then...

    Perhaps run an example to see it work.
    Then following an example to swap the library and instantiation, the change would come with updates to the buffer - then kicking off the DMA driven update -...
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    Nice, Is the PSRAM access speed setup changed...

    Nice, Is the PSRAM access speed setup changed from 88 MHz to 132MHz? If that is a bottleneck it might be some easy help to performance.

    link here : Teensy-4-1-PSRAM-Random-Access-Latency
  15. @KurtE has developed a DMA based update for the...

    @KurtE has developed a DMA based update for the ILI9341 - it might be this with "Asynchronous Update support (Frame buffer)" :: github.com/KurtE/ILI9341_t3n

    That takes a memory buffer for the...
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    What Paul says of course ... I was assuming new...

    What Paul says of course ... I was assuming new to github to ask?
    It can be done on the web - to be somewhat clearer ... with a github account - go to each file and edit "on Paul's repository" - and...
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    If you go to github and make a Pull Request...

    If you go to github and make a Pull Request - include the changed files - they will be placed online for Paul to review and incorporate.

    Very cool by the way.
  18. Nice work KurtE, ... wondering how fast lines...

    Nice work KurtE,
    ... wondering how fast lines per second test runs across the USBHost Serial ... will see if I can try it before you
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    Seems it should - QSPI reads from FLASH as 'just...

    Seems it should - QSPI reads from FLASH as 'just a pointer'? Can't confirm - but seems that is the case - others may knwo for sure to say not or point to example ???
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    The W25Q256 is 16MB flash. It supports QSPI. For...

    The W25Q256 is 16MB flash. It supports QSPI. For T_4.1 usage it would make sense to use the QSPI capable pads on the bottom side for much better processor supported Quad SPI performance. It would...
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    Indeed no confidential or other markings on the...

    Indeed no confidential or other markings on the 70 page:


    High Assurance Boot Version 4
    Application Programming
    Interface Reference Manual

    COPYRIGHT 2018-2019 NXP

    Or the 73 page:
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    ... Here - the unsecure MD5 value I get is :: ...

    ... Here - the unsecure MD5 value I get is ::

    Algorithm : MD5
    Hash : 3FD303E7450E0F6A97D346B8250E3091
    Path : T:\T_Downloads\cst-3.3.1...
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    I don't have MD5 handy - but updated post #16...

    I don't have MD5 handy - but updated post #16 matches location and size and I see this:



    Name: hab_types.h
    Size: 42373 bytes (41 KiB)
    CRC32: 32B4830E
    CRC64: 3C1830A58D5CFCF6
    SHA256:...
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    Yes, As noted in p#11 - with a 'registered user'...

    Yes, As noted in p#11 - with a 'registered user' login I downloaded the CST.

    Extracted I see this::


    T:\T_Downloads\cst-3.3.1 (2)\cst-3.3.1\docs>dir
    Directory of T:\T_Downloads\cst-3.3.1...
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    This 20 page doc seemed to be readable without...

    This 20 page doc seemed to be readable without login :: nxp.com/docs/en/application-note/AN4581.pdf

    AN4581
    i.MX Secure Boot on HABv4 Supported Devices
    Rev. 4 — June 2020

    There is a new CST...
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    DMAMEM is just the other half of the 1024KB of...

    DMAMEM is just the other half of the 1024KB of RAM on the T_4.x. It is non contiguous so to make use of all RAM requires buffer in both free faster DTCM and the DMAMEM. In this case RAM between the...
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    Good work, thanks for sharing.

    Good work, thanks for sharing.
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    Those ports have full function when properly...

    Those ports have full function when properly wired GND and proper RX<>TX association to a 3.3v UART device - as long as nothing else in software touches those pins beyond Serial4.begin() of...
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    Odd things happen at times :( - I've had doubled...

    Odd things happen at times :( - I've had doubled posts - but never deleted

    That is also Odd because the New MSFT EDGE uses the chrome engine now and works fine - I've not ever used chrome itself...
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    Found the download file it seemed clean - the PUP...

    Found the download file it seemed clean - the PUP was prevented after download - doesn't seem that download site may be clean.

    So looking in the non IDE source tree this is the problem - see post...
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    FYI - Got back to desktop - clicked download and...

    FYI - Got back to desktop - clicked download and my machine prevented download seeing the downloader as a 'PUP - potentially unwanted program'
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    just dropping the INO in the post would be easier...

    just dropping the INO in the post would be easier - than pulling the zip and working through it just to see the setup() code and what it does
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    Not seeing current code? perhaps there is some...

    Not seeing current code? perhaps there is some type of "while(!Serial);" in setup - or the indicated "manually start the calibration" is holding things up waiting for user input.

    either way...
  34. Is that using the latest Combined Arduino IDE and...

    Is that using the latest Combined Arduino IDE and TeensyDuino 1.53 installer from PJRC?
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    I figured 100 would be a good start - and coded...

    I figured 100 would be a good start - and coded for only blocks of 10 allocs. I was really wanting to prove that everything would get returned to the free heap. With no idea how robust the library...
  36. Very nice - image seems valid indeed :) , good...

    Very nice - image seems valid indeed :) , good work.
  37. Those p#2 notes are T_4.x specific. The T_3.6...

    Those p#2 notes are T_4.x specific. The T_3.6 much less involved.
  38. Assuming this is a T_4.x? This thread has links...

    Assuming this is a T_4.x?
    This thread has links to general T_4 memory info :: pjrc.com/threads/63695-malloc-free-for-EXTMEM-and-DTCM

    That gives details on memory layout and how to place things in...
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    Cool that it can sm_alloc from multiple pools! ...

    Cool that it can sm_alloc from multiple pools! There is a text label error in setup where simple.ino showed 't2' for this 't1':

    Serial.printf("t1 address: %p, value: %s\n", t1, t1);

    ...
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    There is a Teensy 4.0 page here on PJRC with a...

    There is a Teensy 4.0 page here on PJRC with a "Memory Layout" section :: pjrc.com/store/teensy40.html

    There is a post that lead to that page as well to find if more info would be helpful.

    The...
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    Nice! @luni as @mjs513 noted - Good Find it...

    Nice! @luni as @mjs513 noted - Good Find it seems!
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    Quick mod gave: ...

    Quick mod gave:


    T:\tCode\libraries\static_malloc\examples\Simple\simple.ino Oct 10 2020 14:09:20
    PSRAM size =16 MB
    f1 address: 0x7000000c, value: 3.141593
    f2 address: 0x700000b4, value:...
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    Cool, will see about testing soon (?) ...

    Cool, will see about testing soon (?) ...
  44. Just saw this is a new thread to the one you...

    Just saw this is a new thread to the one you started :: pjrc.com/threads/63635-Eagle-Schematic-library-for-the-Teensy-3-2

    That is the one I was ferreing to I see now that I looked it up ... there...
  45. There may be bad ones - but there are good CAD...

    There may be bad ones - but there are good CAD images somewhere - seems a post yesterday where Paul noted the T_3.1 is the same as T_3.2 - that post had other links
  46. To start loop() cycles some millions of times...

    To start loop() cycles some millions of times each second on a t_4.x - slowed by added code or any delay()'s. The main code is loop() - _isr()'s and background tasks will take time. If core...
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    For 480 Mbps USB the T_4.x is the answer over...

    For 480 Mbps USB the T_4.x is the answer over T_3.x's - for USBHost as well T_4.x works like the T_3.6 with the support it has.

    On Teensy the USB support is native on chip hardware and Paul has...
  48. Paul does a lot behind the scenes ( and after )...

    Paul does a lot behind the scenes ( and after ) to make a stable environment - but somethings do impressively take on a life of there own ...

    I've only been half following - as I didn't figure I'd...
  49. @KurtE: Are these the pins in use shown in the...

    @KurtE: Are these the pins in use shown in the INO?:


    Teensy T4.x using ILI9341_t3n library.
    OV7670_VSYNC 2
    OV7670_HREF 3
    OV7670_PLK 4
    OV7670_XCLK 5...
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    Use a different name for "y1". That name is...

    Use a different name for "y1". That name is already spoken for and declared with a different type.

    With verbose compile it shows here as:


    T:\tCode\FORUM\VarConflict\VarConflict.ino:1:11:...
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