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    bobolink

    @bobolink

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    Posts made by bobolink

    • RE: How do you change volume on Core2

      @bobolink FYI to myself
      If you have an engineering background--part of Micropython--
      module 'dba: calculate dBA (A-weighting decibels) from an input stream of digital audio samples
      module 'i2stools': function to efficiently extract sample data from a buffer filled by I2S
      Signal processing (logical shifts--fractional multiply) on the PCM samples instead of hardware volume control gets the job done also.

      posted in Core 2
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      bobolink
    • RE: How do you change volume on Core2

      @zontex OK thanks for the reply. I guess you could set the volume of the .WAV files in the pc program “Audacity”.
      But user volume control would be nice.

      posted in Core 2
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      bobolink
    • RE: How do you change volume on Core2

      Is there a C/C++ way to set volume?

      posted in Core 2
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      bobolink
    • RE: Please allow jtag or jtag over usb on next version

      @thrasher
      As always, GPIO 14 is already in use for the display.

      “All the pins other then GPIO14 are availiable, however for some reason it was used for LCD CS on the M5Stack rendering JTAG unuseable.”

      posted in PRODUCTS
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      bobolink
    • RE: Please allow jtag or jtag over usb on next version

      @ajb2k3 Of course we are talking about two different levels of debugging.

      The BBC micro is also for beginners but allows both.

      microbit jlink upgrade

      posted in PRODUCTS
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      bobolink
    • RE: Please allow jtag or jtag over usb on next version

      @thrasher But don’t you need the LCD display operating while you use JTAG to debug your code?
      Some kind of demultiplexer hardware added maybe?

      posted in PRODUCTS
      B
      bobolink
    • RE: Please allow jtag or jtag over usb on next version

      @rleinfellner
      Wouldn’t you want the JTAG scan path clear for automated factory testing?

      posted in PRODUCTS
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      bobolink
    • RE: Arduino Debug on ESP32

      @cregganna
      Bump -
      Now (last month) JTAG debugging went free on PlatformIO/Visual Studio Code and Andreas Spiess did a YouTube video on debugging with the Espressif ESP-prog board JTAG interface for the ESP-32.
      First thing I did was check into M5Stack Core and found it wouldn't work.
      Another version with IO12-15 available for JTAG inline debugging would be necessary and appreciated.
      thank you

      posted in PRODUCTS
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      bobolink
    • Using the DAC to make a tone with M5Stack

      Example of using the M5Stack’s DAC to make a tone v.s. Arduino tone()
      DAC v.s. Digital pin.
      3 sec. DAC v.s. 3 Sec. digital pin

      sinf() via DAC v.s. Arduino tone(pin, frequency, duration)

      posted in General
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      bobolink
    • RE: M5ez, a complete interface builder system for the M5Stack as an Arduino library. Extremely easy to use.

      I really like M5ez so I gave it its own core. Justified it by saying that’s real MVC architecture! Real Computer Science stuff.
      /*


      GLOBAL INFO
      core 0 is the communications processor.
      Uses the ESP-NOW protocol
      on the 2.4 GHz radio
      This process runs as a task created
      on core 1
      core 1 is the UI processor.
      Maintains the M5Stack M5ez LCD menu
      Runs Arduino setup() and loop()


      */
      Use RTOS semaphores when accessing the global vars to/from the local versions.

      posted in PROJECTS
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      bobolink