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Type: Posts; User: Frank B

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  1. The name 4.1 might be less-ideal for minor...

    The name 4.1 might be less-ideal for minor updates.. see T3.0, T3.1, T3.2 ?!?
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    edits will be gone after the next update.. ...

    edits will be gone after the next update..


    @Paul do you plan to repair CMSIS and make shiftOut()* or tempmon work?

    *my son wants to build a working clock with 7segs but your lib does not work...
  3. But you get a stream of data, not data chunks. If...

    But you get a stream of data, not data chunks. If your application interpretes this as chunks - ok, it can :)

    - insert a static bool startflag=false in SendAnalogData
    - if the startflag is...
  4. A question: The 3.6 has 6 UARTs in Hardware - why...

    A question: The 3.6 has 6 UARTs in Hardware - why do you want to emulate one with software?
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    Do you have a simple http-request example ?

    Do you have a simple http-request example ?
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    Ok, the Amazon Basics USB2.0 adapter works. ...

    Ok, the Amazon Basics USB2.0 adapter works.


    USB Host InputFunctions example

    USB Ready

    Mutex initialized: 0

    Mutex initialized: 1
  7. Yes, exactly. Don't know why NXP did not...

    Yes, exactly. Don't know why NXP did not implement it.
  8. Easy - the chip does not support that. It's not a...

    Easy - the chip does not support that. It's not a problem with the library.
    So there is no workaround too.
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    https://www.pjrc.com/teensy/gui/ Be aware that...

    https://www.pjrc.com/teensy/gui/

    Be aware that the tool still needs updates for Teensy 4 (WIP)
  10. Long time ago... :) There is a gz file with all...

    Long time ago... :)
    There is a gz file with all needed things: https://github.com/FrankBoesing/fonts/blob/master/frank.tar.gz

    If there is a bug in the converter (I know of small issues regarding...
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    Me too. 19072 19073

    Me too.
    19072
    19073
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    That does not change my proposal.

    That does not change my proposal.
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    See post#6 Just give the intended, often used...

    See post#6

    Just give the intended, often used and tested connection a chance. It's proved to work reliable. Male+female pinheaders - without wires. Maybe it helps?
    Even if not - you'll know if...
  14. Yes, the idea to use LRCK is good.

    Yes, the idea to use LRCK is good.
  15. The audio-library AudioPlayQueue...

    The audio-library AudioPlayQueue will be helpful.
  16. No need for that. The SPI-Slave automatically...

    No need for that. The SPI-Slave automatically uses the Master's clockrate. The master has just to be fast enough.
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    Have you ever tried that with the 32kHz signal...

    Have you ever tried that with the 32kHz signal from a cheap DS3231 "ultra precise RTC" ? https://www.maximintegrated.com/en/products/analog/real-time-clocks/DS3231.html
    I bought a board for 2€ or 3€...
  18. - IOMUXC_GPR_GPR16 now says the upper bits are...

    - IOMUXC_GPR_GPR16 now says the upper bits are the VTOR reset value.
    - Bit 24 in SNVS_LPCR what I found (enable the 128 Bit nvram, or is it "GPR_Z_DIS" ?) is still undocumented.
  19. New reference Manual Rev 2 for i.MX RT1060 : 11 Feb 2020

    NXP updated the manual for Teensy 4:
    ...
  20. ?? so simply don't transmit before the first...

    ?? so simply don't transmit before the first sample != 0.

    Don't know how we can help without seeing your sourcecode.
  21. As long as you can assume a reliable connection -...

    As long as you can assume a reliable connection - which is a absolute must anyway - no data-synchronization is necessary. SPI has a clock signal.
    You just have to make sure that transmitter and...
  22. 16 Bit per channel, 44.117Hz

    16 Bit per channel, 44.117Hz
  23. ?? Why don't you synthesize on the Teensy ?...

    ?? Why don't you synthesize on the Teensy ? Adding a due which is much slower makes not that much sense..?
    Best would be SPI.
  24. I don't think Paul made this connection out of...

    I don't think Paul made this connection out of boredom, or because he had too much room on the pcb he wanted to fill.
    I guess it has a function. Perhaps for a planned USB-Host functionality?
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    I guess the simplest - as begin - is the...

    I guess the simplest - as begin - is the intervaltimer.
    You might look at the NVIC macros (NVIC_ENABLE_IRQ etc), vector table, attachInterrupt, pin irqs and software triggered interrupts (every...
  26. Indeed, some time ago I saw a BASIC for Teensy. ...

    Indeed, some time ago I saw a BASIC for Teensy.

    Using the DAC might be something like


    100 POKE dac, value
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    +1 the interrupt system is really good and easy...

    +1 the interrupt system is really good and easy to use.
  28. Thread: MCU trends

    by Frank B
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    You don't want the noise from all the other...

    You don't want the noise from all the other circuits on the chips. External circuits can do this much better and are not that hard to use.
    Maybe some day a company makes a easy to use addonboard for...
  29. blame the library - it does not consider other...

    blame the library - it does not consider other boards.
  30. The honour is due to Sir defragster.

    The honour is due to Sir defragster.
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    Please test :-) (use lower temperatures) ...

    Please test :-) (use lower temperatures)

    https://github.com/PaulStoffregen/cores/pull/434

    https://github.com/PaulStoffregen/cores/blob/98311f0a33bd9e421940fc114e7ae21dd83b6bca/teensy4/tempmon.c...
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    Oops. sorry. Did'nt want to leave you hanging....

    Oops. sorry. Did'nt want to leave you hanging.
    It's not really a "bug" (sorry again), too. The main code is OK - besides switching off which was my fault because the manual is unclear.

    The...
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    Upload a simple (known to work) sketch with...

    Upload a simple (known to work) sketch with usb-type set to serial.
    If it does not respond, press the button on the teensy.
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    ..found a bug in tempmon.c :) I know now the...

    ..found a bug in tempmon.c :)
    I know now the reason why the interrupt is always firing..
    takes a while to fix it - i'm too tired now (1:00 here)
    Good night.

    p.s. will fix powerbutton tomorrow,...
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    Note, at the moment it switches off the CPU, but...

    Note, at the moment it switches off the CPU, but not the on-board voltage regulator TLV75733 (3v3 pin stays on)
    I'm working on a solution to switch 3v3 off, too (->same behaviour as power-button)
    ...
  36. Also , it might be a problem to update the LEDs...

    Also , it might be a problem to update the LEDs some thousand times per second.
    For a quick test, you could a delay(1000); to your loop.
  37. Yes, and a large label "For Teensy 4.x" or "For...

    Yes, and a large label "For Teensy 4.x" or "For Teensy 3.x"
  38. The headphone socket must be on the same side as...

    The headphone socket must be on the same side as the teensy usb connection. On your photo it seems to be on the wrong side.

    https://www.pjrc.com/store/teensy3_audio.html
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    Sticky: Got the new displays. so, finally:...

    Got the new displays.

    so, finally:
    https://github.com/PaulStoffregen/cores/pull/433/files

    Its now nearly 50% clock ratio.
    Runs fine for every F_CPU_ACTUAL.
  40. Yes, not now...

    Yes, not now...
  41. I'm curious about them, too (but all time ;-) ...

    I'm curious about them, too (but all time ;-) Your Sketch is great.
    For example, for SPI it makes sense to select other inputs to get more choices for the clock (better granularity). I've used this...
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    USB 2.0 - it's not the "Basics" version, it is...

    USB 2.0 - it's not the "Basics" version, it is "Amazon's choice", and looks identical from the outside. It has a "UGREEN" printing on it.
    Amazon's choice was wrong ;)...
  43. Tell me the source-clock and its MHz of SPDIF0...

    Tell me the source-clock and its MHz of SPDIF0 without looking at the sourcecode..
  44. I trust them. Now, it needs to be extended to...

    I trust them.
    Now, it needs to be extended to all the peripherals :)
  45. ..to answer my own question from #63: It's fixed...

    ..to answer my own question from #63: It's fixed to 528MHz :-)
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    ...and these connections are not reliable.

    ...and these connections are not reliable.
  47. Because it's slower.

    Because it's slower.
  48. We really need our own clock-diagram - nobody...

    We really need our own clock-diagram - nobody knows what is connected where with what speed.

    A function to display it at runtime would be perfect. Things can change at runtime. The only constants...
  49. Now, when I see these numbers again.. Why is the...

    Now, when I see these numbers again.. Why is the syspll 528MHZ? Is that optimal? (What is connected?) Have to take a look at the diagram, too.
    I guess it's just 528 because that was the default cpu...
  50. There is a bunch of PLLs and clocks, dividers and...

    There is a bunch of PLLs and clocks, dividers and switches.
    The name "Clock tree" if totally correct:)
    Take a look at the reference manual! (But don't trust it)
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