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  1. Replies
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    Thanks Michael that did the job. Best regards,...

    Thanks Michael that did the job.

    Best regards,
    Johan
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    I2C and AD7991 and Teensy4

    Hi all,

    The Teensy 4...... my questions : the AD7991 works on pins 19 and 18 but not on 17 and 16 any suggestions?
    Best,
    Johan
  3. The best dual external 12 bit SPI ADC for Teensy 4

    Dear all,

    I need a high speed dual SPI 12 bit ADC for the Teensy 4 I like to use this for my power and swr meters.

    Low noise and high speed is important.... and for sure usable for the Teensy...
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    I2C maximum speed

    Hi all,

    For my projects I must know the maximum speed of the I2C bus Teensy 4 this is needed to read my external A/D converter.

    If someone know please replay.

    Best regards,
    Johan
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    That's a pitty because the RA8875 from Buydisplay...

    That's a pitty because the RA8875 from Buydisplay are one of the best displays on the market today, in one or other way there is a solution... because I have many projects that are working perfectly...
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    RA8875 from Buydisplay

    Hi all, My projects are running fine with a Teensy 3.6 but for better performance I like to use the Teensy 4, I use a RA8875 display from Buydisplay but when compiling I get a error. What can I do...
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    Audio input Audio board

    Dear all,,

    I use the audio board with sgtl5000, my short wave receiver produce CW signals so weak signal are very good but strong signals make errors.

    So the audio input is then to high for the...
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    Audio board automatic volume

    Dear all,

    I like to adjust the gain from the my CW decoder I use this code,

    // GUItool: begin automatically generated code
    AudioInputI2S i2sIn; //xy=231.25,88...
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    Audio board automatic volume

    Dear people at this forum,

    For my CW decoder I use a audio board sgtl5000, is it possible to have a automatic volume control. For weak signals the audio board is perfect but when stronger...
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    This is not possible because I have many many...

    This is not possible because I have many many lines of code and can not combined.

    Perhaps there is an other way I don't have a clue on this moment.......
    Thanks for the reply.
    Best,
    Johan
  11. Replies
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    Two seperate programs in a Teensy 3.6

    Hi all,

    I have two programs each about 3200 lines ( CW and RTTY program) is it possible to have two separate programs in a Teensy 3.6 so that I can choose when startup which program I like to...
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    Hi Paul, It works out of the box, thanks a lot!...

    Hi Paul,
    It works out of the box, thanks a lot!

    Best regards,

    Johan Holstein
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    Yes but to make this menu structure is a lot of...

    Yes but to make this menu structure is a lot of work and knowledge, perhaps add a simple encoder part at the top and use the rest of the program?
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    Hi Colmar, can it be changed for a Teensy 3.6 ? ...

    Hi Colmar, can it be changed for a Teensy 3.6 ?

    Best and thanks for the quick response..
    Johan
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    Dear People at Bulletin, I need this menu...

    Dear People at Bulletin,

    I need this menu routine for my project but is seem the the encoder is not working with Interrupts?

    Is there anyone who can help to get this running?


    #include...
  16. This will do the job

    Thanks Kurt, I think I can manage now the issues, thanks a lot!

    Best regards,
    Johan Holstein
  17. Dear all, I am not sure if I can ask my...

    Dear all,

    I am not sure if I can ask my questions in this thread but I give it a try.

    My Teensy 3.6 needs a USB keyboard for sending CW the keyboard works however there are a few pro see below....
  18. RA8875 monitor program included with RA8875-0.70 library and fonts.

    Cleanup and small adjustments now included with the RA8875-0.70 library and Liberation mono fonts.
  19. [queued] RA8875 CW monitor with 5" TFT display acts as a monitor

    Hi all,

    For big TFT displays it's rather difficult to scroll text without delay when we talk about LiberationMono fonts size 28, however for the RA8875 dual layer is this an easy job.

    My setup...
  20. Thread: memcpy

    by pd0lew
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    Hi Kurt, a good choice the RA8875 from...

    Hi Kurt, a good choice the RA8875 from Buydisplay.com ...... see my video.
  21. Thread: memcpy

    by pd0lew
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    Hi rcarr, please look here for the story...

    Hi rcarr, please look here for the story
    https://youtu.be/fpzn6EV80RY
    Best regards,
    Johan
  22. Thread: memcpy

    by pd0lew
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    Hi rcarr, perfect everything works how it should...

    Hi rcarr, perfect everything works how it should be, now everyone may use the terminal program for many purposes.

    THANK YOU.

    Hereby the complete code:

    //** Copyright (c) 2018 J.G. Holstein ...
  23. Thread: memcpy

    by pd0lew
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    Hi rcarr, we are nearly there ......this works...

    Hi rcarr, we are nearly there ......this works however the very first line is no aligned with the other lines.
    If this can also be solved then we have a nice terminal program with very fast...
  24. Thread: memcpy

    by pd0lew
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    Hi rcarr, still not perfect.... see both video's...

    Hi rcarr, still not perfect.... see both video's in the dropbox the last video is the changed code
    x = 42 - (last_space + 1); // Get length of text we want to move to front
    ...
  25. Thread: memcpy

    by pd0lew
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    Hi rcarr, looks perfect only one small issue is...

    Hi rcarr, looks perfect only one small issue is the text aligning left side of display..

    thanks a lot for helping!

    Video in the dropbox.
  26. Thread: memcpy

    by pd0lew
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    Hi rcarr, there are some problems see video in...

    Hi rcarr, there are some problems see video in the dropbox link.

    https://www.dropbox.com/sh/cjzoy9porvo73j1/AAAuS8rpk3TlwLAZLatUBK7xa?dl=0
  27. Thread: memcpy

    by pd0lew
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    Very appreciated, when it works then a lot of...

    Very appreciated, when it works then a lot of radio hams are very happy because this is a cheap and very sharp tft display and in combination with my fancy decoder one of a kind.

    Thanks rcarr and...
  28. Thread: memcpy

    by pd0lew
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    Hi rcarr, thanks for the reply. on this moment I...

    Hi rcarr, thanks for the reply. on this moment I have no clue do do that..... also the text is not lined out at the left side of the display. If you have something in mind please edit the file. Thank...
  29. Thread: memcpy

    by pd0lew
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    https://youtu.be/8pDzAzPFfAk

    https://youtu.be/8pDzAzPFfAk
  30. Thread: memcpy

    by pd0lew
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    Hi rcarr, I tried a lot to see what is the fasted...

    Hi rcarr, I tried a lot to see what is the fasted way. The speed is ok now but still an issue to solve see video.

    Thanks for helping!

    Johan

    The code till now.


    ...
  31. Thread: memcpy

    by pd0lew
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    Hi Kurt, I respect your privacy and time....

    Hi Kurt,

    I respect your privacy and time. Remember Adafruit tft's are working but they library's are never optimized. For my project in fact a simple terminal monitor it looks easy as that, but...
  32. Thread: memcpy

    by pd0lew
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    Hi Kurt, for testing I can send you my fancy...

    Hi Kurt, for testing I can send you my fancy morse decoder with the Display. Best regards, Johan
  33. Thread: memcpy

    by pd0lew
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    On the video is clear to see that word breaking...

    On the video is clear to see that word breaking looses sometimes characters.
  34. Thread: memcpy

    by pd0lew
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    A bit better video. ...

    A bit better video.

    https://youtu.be/lYlmR2oQpF0
  35. Thread: memcpy

    by pd0lew
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    Hi Kurt and others, I think the delay is gone...

    Hi Kurt and others,
    I think the delay is gone .....
    https://youtu.be/j0lHHpljct4

    But still a small issue, see at the video there are some characters missing when word breaking occurs.

    But I...
  36. Thread: memcpy

    by pd0lew
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    The code in total. #include ...

    The code in total.

    #include <SPI.h>

    #include <RA8875.h>

    //MISO 8 //12
    //SCLK 14 //13
    //MOSI 7 //11
    #define RA8875_RESET 255
  37. Thread: memcpy

    by pd0lew
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    Hi Kurt and others, Thank you. See the code...

    Hi Kurt and others, Thank you.

    See the code below..... repaint in black is removed and changed tft.setTextColor(RA8875_WHITE,RA8875_BLACK);
    This looks much better ..... now quickly test for 10...
  38. Thread: memcpy

    by pd0lew
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    More or less I did everything what I can think...

    More or less I did everything what I can think off.... all the help is very welcome.

    Thanks,
    Johan
  39. Thread: memcpy

    by pd0lew
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    Hi Kurt, Thanks for helping with my CW...

    Hi Kurt,

    Thanks for helping with my CW decoder, a small display is working awesome.
    Why so much effort..... because the display is cheap and the colours are very nice for my CW decoder.

    If it...
  40. Thread: memcpy

    by pd0lew
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    Time without tft.fillRect(0, 430, 800, 32,...

    Time without tft.fillRect(0, 430, 800, 32, RA8875_BLACK); // Clear line


    slow code took 62995 microseconds
    slow code took 120994 microseconds
    slow code took 191341 microseconds
    slow code took...
  41. Thread: memcpy

    by pd0lew
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    Hi everyone, I measured the time in the...

    Hi everyone,

    I measured the time in the printandscroll_layer_1 shifting lines up.
    43 x 9 = 387 bytes and 4 rectangles black over the SPI bus is this to much?


    slow code took 65477...
  42. Thread: memcpy

    by pd0lew
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    What can we do rcarr?

    What can we do rcarr?
  43. Thread: memcpy

    by pd0lew
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    Ok, I will test this tomorrow and I am curious...

    Ok, I will test this tomorrow and I am curious how this works out.

    Thanks for the replay!
  44. Thread: memcpy

    by pd0lew
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    The CW moinitor program in total

    Thank you all for helping !
    I included the whole CW monitor program ... I use Layer 1 and Layer 2 this is needed for speed up when copy the lines. This is really needed because I use Liberation mono...
  45. Thread: memcpy

    by pd0lew
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    My question was why the memmove will become...

    My question was why the memmove will become slower at more lines see the video.....
  46. Thread: memcpy

    by pd0lew
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    memcpy

    Slow memcpy or memmove, see the video here and look at the last part of the video.

    https://www.youtube.com/watch?v=hIfnh6LuMp4&feature=youtu.be


    void printandscroll_layer_1() {

    static...
  47. Thread: ADC input gain

    by pd0lew
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    ADC input gain

    Hi all, my morse decoder has a input for audio now I like to regulate the input as volume is there anything I can use....
    Best regards.
    Johan
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