Logic RDM Sniffer - Revision history

Peternewman: /* OLA Sniffer */ Switch to interwiki

2014-12-28T16:51:01Z

OLA Sniffer: Switch to interwiki

← Older revision		Revision as of 16:51, 28 December 2014
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	=== OLA Sniffer ===		=== OLA Sniffer ===

	OLA has a text-based DMX/RDM sniffer that works with the Logic (it could easily be extended to work with the Logic 16). It can be found in [~~https~~:~~//github.com/OpenLightingProject/ola/tree/master/~~tools/logic tools/logic] directory of the OLA sources.		OLA has a text-based DMX/RDM sniffer that works with the Logic (it could easily be extended to work with the Logic 16). It can be found in [[code:tools/logic\|tools/logic]] directory of the OLA sources.

	Limitations:		Limitations:
	* the sniffer doesn't understand DUB responses yet since it looks for breaks.		* the sniffer doesn't understand DUB responses yet since it looks for breaks.
	* it may struggle with signal timings that are at the edge of the E1.11 standard. If you experience problems with the sniffer please email the [http://groups.google.com/forum/#!forum/open-lighting Open Lighting Mailing List]		* it may struggle with signal timings that are at the edge of the E1.11 standard. If you experience problems with the sniffer please email the [http://groups.google.com/forum/#!forum/open-lighting Open Lighting Mailing List]

Nomis52: /* OLA Sniffer */

2014-12-20T17:43:44Z

OLA Sniffer

← Older revision		Revision as of 17:43, 20 December 2014
Line 30:		Line 30:
	=== OLA Sniffer ===		=== OLA Sniffer ===

	OLA has a text-based DMX/RDM sniffer that works with the Logic (it could easily be extended to work with the Logic 16). It can be found in [~~http~~://~~code.google~~.com/p/~~open-lighting~~/~~source~~/~~browse~~/~~#git%2Ftools%2Flogic~~ tools/logic] directory of the OLA sources.		OLA has a text-based DMX/RDM sniffer that works with the Logic (it could easily be extended to work with the Logic 16). It can be found in [https://github.com/OpenLightingProject/ola/tree/master/tools/logic tools/logic] directory of the OLA sources.

	Limitations:		Limitations:
	* the sniffer doesn't understand DUB responses yet since it looks for breaks.		* the sniffer doesn't understand DUB responses yet since it looks for breaks.
	* it may struggle with signal timings that are at the edge of the E1.11 standard. If you experience problems with the sniffer please email the [http://groups.google.com/forum/#!forum/open-lighting Open Lighting Mailing List]		* it may struggle with signal timings that are at the edge of the E1.11 standard. If you experience problems with the sniffer please email the [http://groups.google.com/forum/#!forum/open-lighting Open Lighting Mailing List]

Nightrune at 15:57, 16 September 2013

2013-09-16T15:57:12Z

← Older revision		Revision as of 15:57, 16 September 2013
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	Connecting this circuit to the Logic is fairly simple. Power the board with a MicroUSB Cable or from the +5V, and COM pins on the TTL connector. Then attach the Logic's grey Ground wire to the COM pin on the sniffer circuit, pull the DIR pin low to put the board in RX mode and connect your Logic's channel 1 (generally it's the black cable) to the RX pin. Finally Connect a DXM/RDM source to the board and make sure the green LED is flickering to show data is receiving on the TTL side.		Connecting this circuit to the Logic is fairly simple. Power the board with a MicroUSB Cable or from the +5V, and COM pins on the TTL connector. Then attach the Logic's grey Ground wire to the COM pin on the sniffer circuit, pull the DIR pin low to put the board in RX mode and connect your Logic's channel 1 (generally it's the black cable) to the RX pin. Finally Connect a DXM/RDM source to the board and make sure the green LED is flickering to show data is receiving on the TTL side.

			For more information check [[RDM Sniffer Board]]
	== Software ==		== Software ==

Nightrune at 15:08, 16 September 2013

2013-09-16T15:08:04Z

← Older revision		Revision as of 15:08, 16 September 2013
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	At the basic level you only need an RS-485 receiver like the Maxim MAX485 or Linear Technology LT1785 to translate from the DMX/RDM differential levels to a TTL level that the Saleae Logic understands.		At the basic level you only need an RS-485 receiver like the Maxim MAX485 or Linear Technology LT1785 to translate from the DMX/RDM differential levels to a TTL level that the Saleae Logic understands.
	[[File:RDMSnifferSchematic.jpg\|thumb\|center\|400px\|alt=Example Circuit]]		[[File:RDMSnifferSchematic.jpg\|thumb\|center\|400px\|alt=Example Circuit]]

			Connecting this circuit to the Logic is fairly simple. Power the board with a MicroUSB Cable or from the +5V, and COM pins on the TTL connector. Then attach the Logic's grey Ground wire to the COM pin on the sniffer circuit, pull the DIR pin low to put the board in RX mode and connect your Logic's channel 1 (generally it's the black cable) to the RX pin. Finally Connect a DXM/RDM source to the board and make sure the green LED is flickering to show data is receiving on the TTL side.

	== Software ==		== Software ==

Nightrune: /* Electrical */

2013-09-16T14:58:56Z

Electrical

← Older revision		Revision as of 14:58, 16 September 2013
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	You need some hardware to convert from the differential 485 levels to a signal which the logic can understand.		You need some hardware to convert from the differential 485 levels to a signal which the logic can understand.

	At the basic level you only need an RS-485 receiver like the Maxim MAX485 or Linear Technology LT1785 to translate from the DMX/RDM differential levels to a TTL level that the Saleae Logic ~~Understands~~.		At the basic level you only need an RS-485 receiver like the Maxim MAX485 or Linear Technology LT1785 to translate from the DMX/RDM differential levels to a TTL level that the Saleae Logic understands.
	[[File:RDMSnifferSchematic.jpg]]		[[File:RDMSnifferSchematic.jpg\|thumb\|center\|400px\|alt=Example Circuit]]

	== Software ==		== Software ==

Nightrune: /* Electrical */

2013-09-16T14:57:00Z

Electrical

← Older revision		Revision as of 14:57, 16 September 2013
Line 15:		Line 15:

	At the basic level you only need an RS-485 receiver like the Maxim MAX485 or Linear Technology LT1785 to translate from the DMX/RDM differential levels to a TTL level that the Saleae Logic Understands.		At the basic level you only need an RS-485 receiver like the Maxim MAX485 or Linear Technology LT1785 to translate from the DMX/RDM differential levels to a TTL level that the Saleae Logic Understands.
	[[File:~~Example~~.jpg]]		[[File:RDMSnifferSchematic.jpg]]

	== Software ==		== Software ==

Nightrune: /* Electrical */

2013-09-16T14:52:15Z

Electrical

← Older revision		Revision as of 14:52, 16 September 2013
Line 14:		Line 14:
	You need some hardware to convert from the differential 485 levels to a signal which the logic can understand.		You need some hardware to convert from the differential 485 levels to a signal which the logic can understand.

	~~TODO: sean~~ / ~~josh explain this and post~~ a ~~circuit~~.		At the basic level you only need an RS-485 receiver like the Maxim MAX485 or Linear Technology LT1785 to translate from the DMX/RDM differential levels to a TTL level that the Saleae Logic Understands.
			[[File:Example.jpg]]

	== Software ==		== Software ==

Nomis52 at 16:32, 24 June 2013

2013-06-24T16:32:57Z

← Older revision		Revision as of 16:32, 24 June 2013
Line 27:		Line 27:

	OLA has a text-based DMX/RDM sniffer that works with the Logic (it could easily be extended to work with the Logic 16). It can be found in [http://code.google.com/p/open-lighting/source/browse/#git%2Ftools%2Flogic tools/logic] directory of the OLA sources.		OLA has a text-based DMX/RDM sniffer that works with the Logic (it could easily be extended to work with the Logic 16). It can be found in [http://code.google.com/p/open-lighting/source/browse/#git%2Ftools%2Flogic tools/logic] directory of the OLA sources.

			Limitations:
			* the sniffer doesn't understand DUB responses yet since it looks for breaks.
			* it may struggle with signal timings that are at the edge of the E1.11 standard. If you experience problems with the sniffer please email the [http://groups.google.com/forum/#!forum/open-lighting Open Lighting Mailing List]

Nomis52: Created page with "Saleae Logic The Logic as a 2 line DMX/RDM sniffer The [http://www.saleae.com/logic..."

2013-06-24T16:29:27Z

New page

[[Image:Saleae-logic.jpg|thumb|200px|right|Saleae Logic]]
[[Image:Logic-sniffer.jpg|thumb|200px|right|The Logic as a 2 line DMX/RDM sniffer]]

The [http://www.saleae.com/logic Saleae Logic] makes an excellent [[DMX]] / [[RDM]] sniffer. With the Logic and a small amount of hardware you can build a sniffer for a fraction of the price of commercial units.

== Parts ==
* A Logic or Logic 16, but see the note below.
* 485 driver circuit
* XLR connectors.

== Electrical ==

You need some hardware to convert from the differential 485 levels to a signal which the logic can understand.

TODO: sean / josh explain this and post a circuit.

== Software ==

=== Saleae Logic ===

[[Image:Saleae-dmx.png|thumb|200px|right|The Logic App decoding DMX]]

Saleae provides the [http://www.saleae.com/downloads Logic App] which works on Windows, Mac and Linux. The application has a plugin to decode DMX, but it doesn't understand RDM data. The tool is best for analyzing the signal timing rather than the high level messages.

=== OLA Sniffer ===

OLA has a text-based DMX/RDM sniffer that works with the Logic (it could easily be extended to work with the Logic 16). It can be found in [http://code.google.com/p/open-lighting/source/browse/#git%2Ftools%2Flogic tools/logic] directory of the OLA sources.