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Type: Posts; User: JBeale

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  1. I did try the same program & setup with the...

    I did try the same program & setup with the processor set to 528 MHz. The results look about the same, with the same comb-filter spikes spaced 16 units apart at 15, 31, etc.
    I also tried without...
  2. Teensy 4.0 ADC histogram without averaging

    Running the same code as in my previous post, on Teensy 4.0 board shows a different pattern than on T4.1. On the Teensy 4.0 board, every 16th ADC value, that is ADC readings of the form (16*n - 1) or...
  3. histogram test of 12-bit ADC on T4.1

    I tried out a new Teensy 4.1 that came in the mail today, with Arduino 1.8.12 and Teensyduino 1.52-beta6.
    I accumulated a simple 4096-bin histogram of raw samples without averaging, for 200k samples...
  4. At the time I was testing T4beta1 the ADC library...

    At the time I was testing T4beta1 the ADC library wasn't supporting T4 yet so I didn't use it, and I did not see the 8-sample gap each 256 steps that you describe. I had averaging on, but I believe...
  5. FWIW here is what leaving the "keeper" port...

    FWIW here is what leaving the "keeper" port setting on looked like on my T4.0 beta: https://forum.pjrc.com/threads/54711-Teensy-4-0-First-Beta-Test?p=198315&viewfull=1#post198315
    It had the effect...
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