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serial for LCD to just normal serial.

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  • undefined
    mmiscool
    last edited by 18 Apr 2019, 05:41

    Hello,

    I am working on a project that really requires that I send data over real serial. Not USB to serial but honest goodness real serial I/O pins.

    It appears that there is a serial interface intended for uses with an LCD display. I would like to re purpose that.

    If you know what to change to make it so I can send just regular good old fashioned gcode over this interface. No line numbers or checks sums. That would be really great.

    undefined 1 Reply Last reply 18 Apr 2019, 06:44 Reply Quote 1
    • undefined
      AdiGital @mmiscool
      last edited by AdiGital 18 Apr 2019, 06:44

      @mmiscool I was gonna suggest to disable checksum in config (as I did for my custom UI) but removed the post, realising it probably won't work for printing. I believe it's meant for control only.

      My fully enclosed design

      1 Reply Last reply Reply Quote 0
      • undefined
        dc42 administrators
        last edited by 18 Apr 2019, 10:19

        You can remove the need for line numbers and checksums by using S0 instead of S1 in the M575 P1 command. However, the output will still be buffered for retrieval using M408, instead of being sent directly to the port.

        Duet WiFi hardware designer and firmware engineer
        Please do not ask me for Duet support via PM or email, use the forum
        http://www.escher3d.com, https://miscsolutions.wordpress.com

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        • undefined
          mmiscool
          last edited by 18 Apr 2019, 15:17

          Could you describe this buffering a bit.

          I have done similar things in the past hooking up to an old fashioned ramps board on on this thing is is all a bit confusing.

          Do you know if the serial pins that would normally come off of the USB to serial converter on a normal ramps board are exposed? Might be easier to try and find them.

          undefined 1 Reply Last reply 18 Apr 2019, 21:13 Reply Quote 0
          • undefined
            dc42 administrators @mmiscool
            last edited by 18 Apr 2019, 21:13

            @mmiscool said in serial for LCD to just normal serial.:

            Do you know if the serial pins that would normally come off of the USB to serial converter on a normal ramps board are exposed? Might be easier to try and find them.

            The processor on the Duet has a true USB port, so there is no serial-to-USB converter.

            Duet WiFi hardware designer and firmware engineer
            Please do not ask me for Duet support via PM or email, use the forum
            http://www.escher3d.com, https://miscsolutions.wordpress.com

            1 Reply Last reply Reply Quote 0
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