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  • shawn's Avatar
    07-13-2021, 09:32 PM
    I have working RDM code, both controller and responder, on a Teensy (3 and 4). :) The Responder class (in TeensyDMX) takes care of setting the timings for you, if you look at that header. (But writing an RDM...
    8 replies | 255 view(s)
  • shawn's Avatar
    07-01-2021, 11:06 AM
    Minor fix to TEMPMON register offsets in imxrt.h here: https://github.com/PaulStoffregen/cores/pull/529
    80 replies | 3032 view(s)
  • shawn's Avatar
    06-26-2021, 11:48 AM
    It’s possible to do complete implementations of RDM with TeensyDMX as well (by writing your own `Responder` implementation), but I haven’t released any examples. I do that more in the commercial end of things. There’s...
    8 replies | 255 view(s)
  • shawn's Avatar
    06-07-2021, 03:02 PM
    Just a word of caution about grounding and isolation. I did a quick search for “dmx512 isolation design” and found this link: https://www.analog.com/en/analog-dialogue/articles/isolated-rs-485-in-dmx512-lighting.html...
    18 replies | 866 view(s)
  • shawn's Avatar
    06-07-2021, 11:56 AM
    When the Sender is active, it starts off at a default of zero for all channels (unless told otherwise before starting it). The values are continuously transmitted until told otherwise. Then those new values are...
    18 replies | 866 view(s)
  • shawn's Avatar
    06-06-2021, 07:11 PM
    Tell me an example sequence of steps the DMX line needs to see. I’d love to make this easier, but I’m not quite following the DMX use case when you need to switch directions. (I saw the hardware link you posted above,...
    18 replies | 866 view(s)
  • shawn's Avatar
    06-06-2021, 07:03 PM
    Thanks for that bigger picture. Yeah, threading probably makes it a little easier. A timer‘s also an option, but you’re trading “thread difficulties” for “ISR difficulties”, plus the synchronization concepts they...
    18 replies | 866 view(s)
  • shawn's Avatar
    06-05-2021, 11:19 PM
    Here are a set of details you may or may not already know: DMX uses 2 wires to transmit, a differential pair, per RS-485. That can only send data one direction at a time. It's either transmitting or receiving, but...
    18 replies | 866 view(s)
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About shawn

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Electrical/Power/Software Engineer, LED artist

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