Logic RDM Sniffer - Revision history

Peternewman: /* OLA Sniffer */ Switch to interwiki

2014-12-28T16:51:01Z

‎OLA Sniffer: Switch to interwiki

Nomis52: /* OLA Sniffer */

2014-12-20T17:43:44Z

‎OLA Sniffer

Nightrune at 15:57, 16 September 2013

2013-09-16T15:57:12Z

Nightrune at 15:08, 16 September 2013

2013-09-16T15:08:04Z

Nightrune: /* Electrical */

2013-09-16T14:58:56Z

‎Electrical

Nightrune: /* Electrical */

2013-09-16T14:57:00Z

‎Electrical

Nightrune: /* Electrical */

2013-09-16T14:52:15Z

‎Electrical

Nomis52 at 16:32, 24 June 2013

2013-06-24T16:32:57Z

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.

@@ Line 30: / Line 30: @@
 === 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:
 * 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]

@@ Line 30: / Line 30: @@
 === 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:
 * 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]

← Older revision		Revision as of 15:57, 16 September 2013
Line 19:		Line 19:
	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 ==

@@ Line 16: / Line 16: @@
 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]]
 == Software ==

@@ Line 14: / Line 14: @@
 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 ==

← 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]