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Type: Posts; User: Frank B

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    Ok, I read it was 8Bit pwm (no dacs). Must be...

    Ok, I read it was 8Bit pwm (no dacs). Must be wrong, then..
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    Not really :) Just guessing.. the flash access...

    Not really :) Just guessing.. the flash access might influence things.
    Maybe try to make a function with "fastrun" for every pattern:


    FASTRUN void pattern1(void) {
    noInterrupts();
    do {...
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    Cant you just update the RTC alarm time with...

    Cant you just update the RTC alarm time with every wakeup?
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    Ths is 8 Bit music (from AMIGA) .. . yes, samples...

    Ths is 8 Bit music (from AMIGA) .. . yes, samples with 8 bits, 4 channels only - rough put together without filter, low samplerate and PCM(!) output.
    It will win no quality contest, but it can give...
  5. That's too unspecific.. I connected an...

    That's too unspecific..

    I connected an audioshield and tested the Guitar - example: works.
    Can you post a !minimal! example which does not work?
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    I don't know much about the technical details of...

    I don't know much about the technical details of Amiga.
    If the sprites are nearly as complex (i guess they are more complex) as on C64...
    It was an incredible amount of work to get them work on...
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    I watched the video - great!

    I watched the video - great!
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    I am very curious about your emulator :)

    I am very curious about your emulator :)
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    Yes, sure, the hardware can do that, and much...

    Yes, sure, the hardware can do that, and much more.

    You need to write some code. (Not for 48KHz - the audiolib can already do that with a bit trickery).
    Without the audiolib it's even easier .....
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    You probably may want to look here...

    You probably may want to look here - it does all with DMA in the background, so the CPU can other things :)
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    As all Teensy 3.x + 4.0 have full I2S I wonder...

    As all Teensy 3.x + 4.0 have full I2S I wonder why you post this here(?)
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    You can find this in the latest Reference Manual,...

    You can find this in the latest Reference Manual, Page 1058, "CCM_CSCMR1 field descriptions"
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    Or use Teensy 3.6 with the VGA library and...

    Or use Teensy 3.6 with the VGA library and connect your living-room tv.
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    16 bit = 2 bytes. so 4 bytes per millisecond are...

    16 bit = 2 bytes. so 4 bytes per millisecond are 2*16 bit per millisecond - or 1*16 bit per 500 microseconds. divide this by your 24 channels:
    500/24 = 20 microseconds. 20us / 16 = 1.25 us per bit....
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    No, on ARM, the GPIOs are connected on a internal...

    No, on ARM, the GPIOs are connected on a internal BUS.With which speed it runs, depends on the Teensy-model and its settings. With Teensy 4 it's 150MHz.
    So you can toggle a tight loop with while(1)...
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    This way:...

    This way:
    https://www.pjrc.com/store/teensy3_audio_quadch.jpg
    Note, the headphone-connector and USB are on the same side. The 3.6 is longer than the audio shield - ignore that ;)
    Don't use wires -...
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    I'd just use a 12Mbit hub. Maybe you find one...

    I'd just use a 12Mbit hub. Maybe you find one with "isolation" (don't know if they exist?) or at least with external power.
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    Forum Rule: Always post*complete source code*&...

    Forum Rule: Always post*complete source code*& details to reproduce any issue!
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    Hi, you can use digitalReadFast() instead. It is...

    Hi,
    you can use digitalReadFast() instead. It is not slower and more compatible.
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    Remove the pinMode for readPin - it is not a...

    Remove the pinMode for readPin - it is not a digital input.
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    - this PR by Blackaddr...

    - this PR by Blackaddr
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    Perhaps it is better to take the button specific...

    Perhaps it is better to take the button specific functions from it and copy them to the core.

    Additional:
    - make CMSIS work
    - additional Linkerscripts
    - My pullrequest for a better "switch off...
  23. Anyway, we don't support password guessing here.

    Anyway, we don't support password guessing here.
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    Agreed :) It's a 80ies editor, not a IDE. Edit:...

    Agreed :) It's a 80ies editor, not a IDE. Edit: No, the 80ie editors were better.
    Have you looked at Platformio?
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    These have on all computers impact on codesize...

    These have on all computers impact on codesize and speed. Even on your PC ;)
    If you don't care you can use them.
  26. Where did you get a Teensy 3.1? Its not sold...

    Where did you get a Teensy 3.1? Its not sold anymore.
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    You can still use Arduino - just don't use...

    You can still use Arduino - just don't use libraries and do your stuff at register level ;)
    MCUXpresso uses libraries, too.

    If you still want to use MCUXpresso, I think you need to look at...
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    double post *closed*...

    double post
    *closed*
    https://forum.pjrc.com/threads/57594-Baremetal-development-using-Teensy-4-0?p=230803&viewfull=1#post230803
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    There is a nice picture on Page 1016/17 Looks...

    There is a nice picture on Page 1016/17
    Looks like it is connected to IGP which is CPU-Clock dependent
  30. -logger=machine

    -logger=machine
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    if the spread spectrum option is meant, look for...

    if the spread spectrum option is meant, look for "528MHz System PLL Spread Spectrum Register"
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    ...yes and don't use adapters with levelshifters.

    ...yes and don't use adapters with levelshifters.
  33. ah..ok...I thought is was for Teensy4.0

    ah..ok...I thought is was for Teensy4.0
  34. @luni: add these lines: ...

    @luni:

    add these lines:


    teensy40.menu.usb.2xserial=2x Serial
    teensy40.menu.usb.serial.build.usbtype=USB_DUAL_SERIAL
    teensy40.menu.usb.3xserial=3x Serial...
  35. sure... :) is it -DUSB_DUAL_SERIAL and...

    sure... :)
    is it -DUSB_DUAL_SERIAL and -DUSB_TRIPLE_SERIAL ?
    (a fake serial would be better for debugging - needs no comport)
  36. LOL... as you want... 19140 No need to edit...

    LOL... as you want...
    19140

    No need to edit platform.txt.
    @Tim: set memory=
    should do it.

    .. Have fun til next update :)

    Perhaps one should write an automated Arduino-patcher... maybe...
  37. The linker file says: FLASH (rwx): ORIGIN...

    The linker file says:

    FLASH (rwx): ORIGIN = 0x60000000, LENGTH = 1984K

    2048 - 1984 = 64KB.

    What is your reason not to use a Teensy? And why should your product be "Teensy-Hex" ...
  38. Edit: Ok, new try :) rename linkerfile above...

    Edit:

    Ok, new try :) rename linkerfile above to imxrt1062f.ld

    FASTRUN works. The pervious version from an hour ago had a problem with the calculated number of ITCM blocks. This is fixed.
    Edit:...
  39. attached a working boards.txt for "Teensy40Flash"...

    attached a working boards.txt for "Teensy40Flash" - name the ld file from above imxrt1062f.ld
    that should work, I hope :)
  40. hm, ok, that does not work. so just change the...

    hm, ok, that does not work.
    so just change the name of the file in the teensy40 section in boards txt.
  41. Just add a new "board" to boards.txt with the new...

    Just add a new "board" to boards.txt with the new file. Maybe name it "Teensy 4-flashmem" or something like that. Copy and paste from Teensy4 and edit the name of the ld file.
  42. With the script above, ITCM is zero. As I said -...

    With the script above, ITCM is zero.
    As I said - have not found a way to re-enable FASTRUN. Maybe this weekend. At least it would be nice to know the reason for the linkage error.
  43. @Defragster, WMXZ: tried the *.ld above? ...

    @Defragster, WMXZ: tried the *.ld above?

    Coremark is now 2316 - ok, it fits into the cache.

    When trying to move only FASTRUN to ITCM, I always get a relocation error - not sure why. Jumps too...
  44. Init only - or things where speed does not matter.

    Init only - or things where speed does not matter.
  45. T4: This loads _everything_ to flash: (even...

    T4:
    This loads _everything_ to flash:
    (even "Fastrun")



    MEMORY
    {
    ITCM (rwx): ORIGIN = 0x00000000, LENGTH = 512K
    DTCM (rwx): ORIGIN = 0x20000000, LENGTH = 512K
  46. I can try today. No risk - no fun :) Have no idea...

    I can try today. No risk - no fun :) Have no idea if it will work :)
  47. ...lol.. wrong. better: 2. receiver: if the...

    ...lol.. wrong.
    better:
    2. receiver: if the high-byte is 0xaa skipt the next byte.
  48. That depends only on your imagination:) A...

    That depends only on your imagination:)

    A simple way:
    1. on the sender, send the value 0xffaa in intervals (once per second for example).
    2. receiver:
    - if you receive 0xaaff (<- note, bytes...
  49. As you're using values

    As you're using values <1024 , an idea for a sync could be to use a larger value as sync. For example something like 0xffaa.
  50. Yes, but it's better to learn how to do it,...

    Yes, but it's better to learn how to do it, before using a library for that.
    Its not that hard to add a simple sync.
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