Forum Rule: Always post complete source code & details to reproduce any issue!

Search:

Type: Posts; User: kd5rxt-mark

Page 1 of 7 1 2 3 4

Search: Search took 0.01 seconds.

  1. Replies
    3
    Views
    240

    @rcon: Sometime back in 2018, I wrote a "KiCAD...

    @rcon:

    Sometime back in 2018, I wrote a "KiCAD / freeRouting / OshPark" walk-thru document for the benefit of my fellow radio club members who wanted to dabble in PCB design & fabrication, but had...
  2. @Richie: If you try the char array approach,...

    @Richie:

    If you try the char array approach, you need to make sure that you handle the case where part of your key word comes in at the end of the array, but the remainder of the key word comes in...
  3. Replies
    9
    Views
    382

    @plumped: Did you connect a common ground...

    @plumped:

    Did you connect a common ground between your separate power supply unit for the neopixels & the ground of the Teensy 4.1 ?? From the Arduino IDE, click on File -> Examples -> OctoWS2811...
  4. micro USB vs. USB host connections & capabilities

    Emmanuel (emmanuel63):

    I don't think that will work. All USB operations depend upon a "USB host" recognizing, initializing, & communicating with a "USB device". With your proposed "micro USB...
  5. Replies
    9
    Views
    1,095

    @Michal (frohr): I don't think shorting input...

    @Michal (frohr):

    I don't think shorting input & output on your TP4056 module would be a good idea. I would suggest connecting your cable to the input of the TP4056 module, connecting the output...
  6. Replies
    9
    Views
    1,095

    Michal (frohr):

    Michal (frohr):

    <This> link & <this> associated link & <this> associated link may have information useful in your situation. If you have any questions on the specific approach that successfully I...
  7. Replies
    2
    Views
    254

    @jimmie: Without being able to see the code...

    @jimmie:

    Without being able to see the code that you are using (note Forum Rule at the top of the page), anything that might be suggested would purely be a random guess.

    Also, what version of...
  8. Replies
    4
    Views
    448

    @randomvibe: You might want to take a look at...

    @randomvibe:

    You might want to take a look at <this> forum thread (& there are others . . . just search for "tensorflow").

    Mark J Culross
    KD5RXT
  9. Replies
    31
    Views
    1,028

    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...
  10. Replies
    31
    Views
    1,028

    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,...
  11. Replies
    31
    Views
    1,028

    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...
  12. Replies
    31
    Views
    1,028

    @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...
  13. 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...
  14. @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...
  15. Replies
    58
    Views
    5,292

    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...
  16. Replies
    58
    Views
    5,292

    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...
  17. @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>....
  18. Replies
    283
    Views
    14,017

    @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...
  19. Replies
    283
    Views
    14,017

    @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...
  20. 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...
  21. Replies
    283
    Views
    14,017

    @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...
  22. 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...
  23. Replies
    27
    Views
    3,840

    @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). ...
  24. Replies
    1
    Views
    406

    @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
  25. 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...
  26. Replies
    44
    Views
    4,064

    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...
  27. Replies
    44
    Views
    4,064

    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...
  28. Replies
    44
    Views
    4,064

    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
  29. Replies
    44
    Views
    4,064

    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...
  30. @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...
  31. Replies
    4
    Views
    457

    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...
  32. Replies
    4
    Views
    457

    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...
  33. Replies
    128
    Views
    20,680

    @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...
  34. Replies
    128
    Views
    20,680

    @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...
  35. Replies
    4
    Views
    436

    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...
  36. @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
  37. Replies
    128
    Views
    20,680

    Excellent, thanks !! Mark J Culross KD5RXT

    Excellent, thanks !!

    Mark J Culross
    KD5RXT
  38. Replies
    128
    Views
    20,680

    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...
  39. Looking just at your "while" loop, you seem to be...

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

    Maybe try <here>
  41. Replies
    13
    Views
    1,186

    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
  42. <This thread> may be helpful.

    Mark J Culross
    KD5RXT
  43. Maybe try ...

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

    Mark J Culross
    KD5RXT
  44. Replies
    169
    Views
    29,338

    @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...
  45. 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...
  46. Might try the following: ...

    Might try the following:


    analogReference(EXTERNAL);


    Mark J Culross
    KD5RXT
  47. Replies
    1
    Views
    431

    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...
  48. Replies
    7
    Views
    1,053

    @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
  49. @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...
  50. @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 !!...
Results 1 to 50 of 305
Page 1 of 7 1 2 3 4