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    • BillDouglasBillDouglas
      Participant
      @billdouglas
      2020-11-11 at 14:22
      Post count: 2
      #237

      Please teach, I see the display communication is “master-slave” mode, that is, there is no LCD event active push message to the serial port, if the external MCU to monitor the LCD event, must use the serial port polling, is this so?

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    • Fiona LiuFiona Liu
      Keymaster
      @bancroft
      2020-11-11 at 17:10
      Post count: 371
      #238

      Polling or interruption

    • BillDouglasBillDouglas
      Participant
      @billdouglas
      2020-11-12 at 11:29
      Post count: 2
      #245

      What does interrupt mean and does the LCD have an external pin to trigger the level change?

    • Fiona LiuFiona Liu
      Keymaster
      @bancroft
      2020-11-12 at 11:35
      Post count: 371
      #246

      mcu serial interrupt, the LCD can actively send. For example, a key press. Press a key, LCD will send data out to mcu through the serial port.

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