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    You're welcome !! Glad to help !!

    Mickey (fff54):

    You are very welcome & glad that I could be of some help. I received lots of excellent help on this forum when I first got started using the Teensy, so I'm doing my best to carry...
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    Making good progress

    Mickey (fff54):

    Yup, you are correct again !! I am guessing that you are in the process of learning C, and that's not a bad thing at all !! You are doing well !!

    As you correctly discerned,...
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    Mickey (fff54): Yes, you can do exactly what...

    Mickey (fff54):

    Yes, you can do exactly what you have shown & use a different MIDI CC input to set the brightness individually for each strip.

    Good luck & have fun !! (And again, feel free to...
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    @fff54: I'm not where I can get to my Teensy,...

    @fff54:

    I'm not where I can get to my Teensy, so all of this will be off the top of my head:

    In your original post, you make the following call to activate a particular LED strip & the...
  5. Would it be possible to use the "button" library...

    Would it be possible to use the "button" library to take the 48Hz input clock as if it is a button input, & then setup the "button press action" to trigger on both edges of the input clock. When the...
  6. @Graeme: I don't know the entire technical...

    @Graeme:

    I don't know the entire technical reason(s) that endpoint 1 is not to be used, but there's a comment <here> by @Paul Stoffregen on another thread where he indicates that endpoint 1 is...
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    Tried going back to TD1.56b1 (not sure if this is...

    Tried going back to TD1.56b1 (not sure if this is valid, but it's what I did !!) & get a different error report, but still fails to build:


    C:\Program Files...
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    I just loaded TD1.56b2 over 1.55 & I'm seeing the...

    I just loaded TD1.56b2 over 1.55 & I'm seeing the same "ExChar16_t" error reported (& failure to compile/link) for a sketch that previously built & ran correctly under 1.55:


    In file included...
  9. @fff (Fabrice): I have previously recommended...

    @fff (Fabrice):

    I have previously recommended (& still do !!) a display based upon the RA8875 controller (the supporting library comes with TeensyDuino). You can find the prior discussion <here>....
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    @Mcu32 (aka FrankB): Thank-you, I am happy to...

    @Mcu32 (aka FrankB):

    Thank-you, I am happy to be on the receiving end of your ignore list. Now, if only you would be no longer willing to *write* unnecessary provocations, that would truly be an...
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    @Mcu32: I don't want anything from you except...

    @Mcu32:

    I don't want anything from you except (maybe) to correctly understand the point I made. Here's a shaved-down version of my original post with just the pertinent info since you seem to...
  12. Bill: I hope this answers the question that...

    Bill:

    I hope this answers the question that you are asking. Using Pete's code as follows as an example:


    // AGC - see https://forum.pjrc.com/threads/68320

    #include <Audio.h>
    #include...
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    @Mcu32: Speaking from personal knowledge &...

    @Mcu32:

    Speaking from personal knowledge & experience (I have 35+ years of experience developing & delivering multi-threaded, real-time, data intensive serial & network communications systems...
  14. Even better than referencing a post/thread (where...

    Even better than referencing a post/thread (where you potentially have to dig all of the information+corrections out of several posts), @luni has placed a compendium of the info on using FlexIO into...
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    @Armadafg: I can't offer a specific "solution"...

    @Armadafg:

    I can't offer a specific "solution" but you should make sure that you are using the latest Teensyduino 1.55, just to make sure that you have the latest core support (including T_MM). ...
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    @vince.cemo: Paul has previously fielded...

    @vince.cemo:

    Paul has previously fielded requests for availability of small quantities of stock, for instance <here> . . . hope that helps.

    Mark J Culross
    KD5RXT
  17. Sounds like fun. Would something similar to...

    Sounds like fun. Would something similar to <this> be close to what you are looking for ?? It at least answers the speed question (specs 200ns, where you say you need <500ns). Sounds like you'd...
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    Sticky: @Mcu32: I'm sorry if you were offended by my...

    @Mcu32:

    I'm sorry if you were offended by my last post. In each of my previous posts, when directly addressing my comments to you, I either chose "Reply With Quote" (to supply the context for my...
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    Sticky: As my personal real-life example, the latest...

    As my personal real-life example, the latest version of my TeensyMIDIPolySynth (which now uses the RA8875 display with on-screen sliders & buttons, instead of the original hardware version using pots...
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    Sticky: Yup, and now the default is no lst files. The...

    Yup, and now the default is no lst files. The release notes clearly give the reason for the change.

    Mark J Culross
    KD5RXT
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    Sticky: @Mcu32: No matter which behavior is made the...

    @Mcu32:

    No matter which behavior is made the default, there will be a group of users who will be opposed. If the default is "disabled", then those that want/use the lst files will be offended (as...
  22. @Emmanuel: From my experience (definitely not...

    @Emmanuel:

    From my experience (definitely not an expert), when plugging the Teensy into my PC using the primary microUSB connector, I am able to use the Teensy as a MIDI device (input from the...
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    8-Dale: I was missing something very obvious...

    8-Dale:

    I was missing something very obvious !! I have not used MicroPython, so not recognizable as such to me. Sorry (both that I didn't recognize it & that I can't be of any help) !!

    Mark J...
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    Did you post the actual source that you are...

    Did you post the actual source that you are building & loading into the T4.0 ?? Are you using the Arduino IDE to build ?? What you posted does not build in the Arduino IDE & throws syntax errors on...
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    @PaulStoffregen: OK, thanks for the...

    @PaulStoffregen:

    OK, thanks for the clarification of your reply. I understand that I missed at least one key point: writing the key bits on a locked Teensy has to be done by a program signed with...
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    @PaulStoffregen: As a thought experiment, I'm...

    @PaulStoffregen:

    As a thought experiment, I'm wondering if the following would be possible:

    1) Elsewhere (security document/description) it is covered that the key fuses start at '0' & are...
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    I am working against the exact same challenge...

    I am working against the exact same challenge (RA8875 fonts) & I did look at the examples noted. I do have a few additional questions:

    1) what is the path to the font files ??
    2) it seems that...
  28. @dannytaurus: Have a look at

    @dannytaurus:

    Have a look at <this thread>, which appears to describe a successful implementation with the 6N137.

    Mark J Culross
    KD5RXT
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    Excellent, thanks !! Mark J Culross KD5RXT

    Excellent, thanks !!

    Mark J Culross
    KD5RXT
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    Paul: Thanks for the great work that you have...

    Paul:

    Thanks for the great work that you have put into this . . . I am excited to give this a try. One question does come to mind: Will pressing the "Generate Key" button cause a warning if there...
  31. Looking just at your "while" loop, you seem to be...

    Looking just at your "while" loop, you seem to be incrementing "i" too soon.
  32. Maybe try

    Maybe try <here>
  33. Replies
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    Make a call to see if it exists & if so, use the...

    Make a call to see if it exists & if so, use the O_APPEND flag, otherwise (does not exist) use the O_CREATE flag ??

    Mark J Culross
    KD5RXT
  34. <This thread> may be helpful.

    Mark J Culross
    KD5RXT
  35. Maybe try ...

    Maybe try <this link> as a simple example, with explanations of not only how, but also what & why.

    Mark J Culross
    KD5RXT
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    @RJF: As recommended to you in the other...

    @RJF:

    As recommended to you in the other thread, your report needs a *specific* reference (URL, link, etc.) to where you see the incorrect information. Just trying to use " . . . even though all...
  37. Glad to be able to help !! Sorry, I don't know...

    Glad to be able to help !!

    Sorry, I don't know the answer for your follow-up question. If the error appears on a PJRC website, there's <this thread> where you can report it. If it's some other...
  38. Might try the following: ...

    Might try the following:


    analogReference(EXTERNAL);


    Mark J Culross
    KD5RXT
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    One possibility: define a variable [ start_millis...

    One possibility: define a variable [ start_millis = millis() ] to store the millis() value at the start of your ramp period. After each 100ms delay(), calculate how many millis have actually passed...
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    @frohr (Michal): I believe that the following...

    @frohr (Michal):

    I believe that the following would be the minimum required: RA8875_CS, RA8875_RESET, RA8875_MOSI, RA8875_SCLK, Power & Ground.

    Mark J Culross
    KD5RXT
  41. @kern: Please understand that I am not being...

    @kern:

    Please understand that I am not being critical . . . I really do want to try & help you to solve your problem !! You have stated that you have 576 LEDs. However, I still don't know how...
  42. @kern: You say that you have checked your...

    @kern:

    You say that you have checked your wiring, but you don't give any info on how that wiring is actually done. Without specific wiring info, it's hardly possible to provide any useful help !!...
  43. @jonr: Thanks for that tidbit !! Do you do this...

    @jonr: Thanks for that tidbit !! Do you do this on both sides of a 2-layer PCB & they are thus connected to each other ??

    Mark J Culross
    KD5RXT
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    If you have not already loaded TD 1.54beta9, you...

    If you have not already loaded TD 1.54beta9, you might try that . . . it contains a fix for at least one core bug which caused a delay/hang of approximately 1.7 seconds (in my case, it caused MIDI to...
  45. You do intend to share the fix so that it can be...

    You do intend to share the fix so that it can be permanently fixed for you & everyone else, right ??

    Mark J Culross
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    @PaulStoffregen: I can verify that using...

    @PaulStoffregen:

    I can verify that using 1.54beta9 fixes the freeze in my updated TeensyMIDIPolySynth (this version fixes/works equivalent to the manually applied fix which was initially proposed...
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    SteveSFX: The "PZEM" was just a placeholder. ...

    SteveSFX:

    The "PZEM" was just a placeholder. For your definition of the pzem array, you'll need to define the array using the same type as pzem1-pzem5. As I tried to indicate, without a full...
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    SteveSFX: This is all extemporaneous, so you...

    SteveSFX:

    This is all extemporaneous, so you may have to make some adjustments for it to compile & run.

    Maybe setup the array so that it contains a pointer to (which is essentially the address...
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    This has me wondering what the original...

    This has me wondering what the original native-language sentence might have been that translated to "Hi, dogs who are lost." :confused: !!

    Mark J Culross
    KD5RXT
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    As a point of reference for comparison, in the...

    As a point of reference for comparison, in the initial hardware version of my TeensyMIDIPolySynth, I used 74HC595 shift registers to drive 42 LEDs , as well as 2 x 7-segment LED displays (*all* of...
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