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embedded ARTnet to DMX device

l1t7l3ph0o7

Hello,

I trying to build an embedded ARTnet to DMX device, I already have the device figured out and tested with the arduino uno and ethersheild as per this project here:

http://www.deskontrol.net/blog/arduino-based-dmx-artnet-node/

 

what I'd like to do is make a custom PCB with the everything on one board, which most of it I have figured out, the thing I can't figure out is I'd Like to have 2 switched ethernet ports on the finished pcb. So ethernet can come in on either port and also allow for chaining multiple of the devices together.

 

for the base of the design im bassically building the pcb starting around the atmega 328 then adding the wiznet w1500 chipset as per this diagram from the ethersheild add on for the arduino uno:

http://arduino.cc/en/uploads/Main/arduino-ethernet-shield-06-schematic.pdf

 

beyond that is where things get a little more problematic for me, to add switched ports i was thinking of using something like this:

http://www.micrel.com/_PDF/Ethernet/datasheets/KSZ8863MLL_FLL_RLL_DS.pdf

 

However, I don't know if this is the correct chip to add, or how to interface it with the w1500, can someone please help me out?

What I'm looking for is a diagram to interface these two chips with one another. Or if this isn't what I need, the proper components and a diagram of how they would work together. Also any other components I might have to add in such as resistors, capacitors, cristals, etc.. I'm fairley new to builds like this, but I can read an electrical diagram and make (most) sense of it.

 

Anyways thank you in advance, any replies would be much appreciated. 

  • 0

    Hi Jory,

     

    The chip you refer to will need some interfacing to connect to the remainder of your project. If you wish to chain devices, then chaining switches is possibly overkill (you could just purchase an external 4-port or 8-port, or 12-port, etc switch and connect up many of the devices). An alternative approach (one that I've used in the past for a different purpose) is to use a different interface for the connection between the devices. (Your code of course will need to be modified to cater for this). For example, serial interface. The nice thing about this is that you only need to solder the Ethernet connector and associated circuitry to the first (master) device, meaning that the other slave devices can be lower cost (but could be expanded to master ones by soldering in the missing parts). Anyway, it's just an idea. The external switch method can be a low cost way too.

  • 0 in reply to shabaz

    I'd prefer the built in switch I outlined in the first post, I'd already thought about connecting the devices with an external switch but i'd like to add the built in switch for a more flexible device, so the interfacing is what I was going for.

    as for setting up a master/slave configuration over serial, I feel this takes away some flexibility, as the idea was I could either connect them to a switch or chain the devices, this makes it so they will always have to be chained together and also limits me from using them all as stand alone devices if i wish to use them in different enviorments at the same time.

     

    thanks shabaz, for your info though it is helpful to see other points of view on the subject.

     

    as far as this goes right now I'm still looking for a diagram on how to connect these two chips together.