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  1. Replies
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    Yet another FT8 Transceiver Project

    To All,

    I have published another FT8 Transceiver project for Ham Radio that uses a Teensy 3.6 on Github.

    https://github.com/chillmf/Pocket-FT8

    I hope that some may find this project of...
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    I stand corrected. I am now able to download...

    I stand corrected.

    I am now able to download sketch to board now that I actually have a Teensy 4.0 connected instead of a Teensy 3.2,

    Thanks to all,

    Charley
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    Teensy 4.0 Download Problem

    To All.

    I am the proud owner of a Teensy 4.0 Board.

    I have followed the instructions for loading a new Ardunio IDE and Teensy Library install.


    I have been able to build the benchmarking...
  4. Thread: Audio Library

    by chillmf
    Replies
    1,286
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    614,433

    Dear whollender, I took a quick look at your...

    Dear whollender,

    I took a quick look at your code but I do not see anything obvious. You will understand that there is lot there to digest and dissemble.

    I do have a couple of suggestions from...
  5. Frank, Thanks ever so much for your...

    Frank,

    Thanks ever so much for your explanation of the software_isr.

    Once I realized that the software_isr is really being triggered by a DMA isr in the I2Soutput module I started looking at...
  6. MLU, I would expect that the audio library...

    MLU,

    I would expect that the audio library update to be triggered by a DMA IRQ associated with an I2S input or output.

    I did find such a reference in the output_I2S.cpp file which is pasted...
  7. Paul, Thanks for your reply. I have...

    Paul,

    Thanks for your reply.

    I have executed your suggestion.

    The teensy project source code is at the bottom of this email. I wanted to send you the complete project file set with filter...
  8. Your point is well taken. I misstated the there...

    Your point is well taken. I misstated the there is noise out to 22 khz. I have been doing a lot of testing and I was thinking of a different test setup.

    I am attaching two screen shots of what I...
  9. Yes, I have verified LRCLK at 8 kHz and BCLK at...

    Yes, I have verified LRCLK at 8 kHz and BCLK at 256 khz using a direct measurement with digital oscilloscope.

    Regards,

    Charley
  10. Paul, Thanks for your message. I have...

    Paul,

    Thanks for your message.

    I have already altered the i2s input and i2s output modules as you suggested and I am quite certain that they are working properly since I get good audio at 8000...
  11. Running Audio Library @ 8000 Samples per Second

    I have enjoyed using the audio library on my Teensy to build a software defined radio (SDR). I have added to the audio library code to include a TI3204 codec which has features which are benificial...
  12. Thread: Audio Library

    by chillmf
    Replies
    1,286
    Views
    614,433

    I have enjoyed using the audio library on my...

    I have enjoyed using the audio library on my Teensy to build a software defined radio (SDR). I have added to the audio library code to include a TI3204 codec which has features which are benificial...
  13. Thread: Audio Library

    by chillmf
    Replies
    1,286
    Views
    614,433

    Using edit feature of Audio Library

    To All,

    I have started using the Audio System Design tool.

    I have tried editing a few items to give them a specific name. I double click the item and then fill in the desired specific name and...
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