serial for LCD to just normal serial.



  • 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.



  • @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.


  • administrators

    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.



  • 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.


  • administrators

    @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.


 

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