Component: DMX-512 Slave (Comms: System): Difference between revisions

Latest revision as of 14:37, 13 July 2026

Author	MatrixTSL
Version	2.0
Category	Comms: System

DMX-512 Slave component

A serial based communications protocol designed for controlling theatrical equipment such as dimmers, fog machines and intelligent lights. DMX-512 Slave devices are daisy chained together with a final 180R terminating resistor at the end of the chail. DMX requires the signal to be level shifted from VCC and GND to +2.5V and -2.5V.

Component Source Code

Please click here to download the component source project: FC_Comp_Source_DMX-512_Slave.fcfx

Please click here to view the component source code (Beta): FC_Comp_Source_DMX-512_Slave.fcfx

Detailed description

No detailed description exists yet for this component

Examples

DMX Slave Example, captures the first DMX data channel sent from the Master and outputs the value onto a Port using the LED array component. DMX Slave Example1

For DMX 512 Master example see DMX Master

Macro reference

GetDataChannel

	GetDataChannel
Gets the data byte from a data channel
- UINT	Channel

- BYTE	Return

Initialise

	Initialise
Configures the UART serial interface.
- VOID	Return

ReceiveDataChain

	ReceiveDataChain
Waits for a BREAK, MAB and StartCode followed by the contents of the data channels. Returns 0 to indicate a timeout and 1 to indicate succesful reception.
- BYTE	Timeout
0 = Don't wait, 1 - 254 = 1ms - 254ms, 255 = Wait forever
- BYTE	Return

Property reference

	Properties
	Serial Properties
	Channel
UART Channel selector Software channels are bit banged using generic I/O pins but are not as reliable as hardware channels. Hardware channels use the selected peripheral on-board the target microcontroller.
	RX
Pin to be used for Receive data
	Baud Options
Baud rate option selector
	Baud Rate

	DMX Properties
	Data Channels
Number of data bytes to receive from the master, Max 512 bytes per transmission. 24 Bytes minimum from Master to match minimum 1204us timing requirements, not all channels need to be used.
	Start Channel
Channel from the master which we want to start taking our data channels
	Use Start Code
Do we wait for the start code or simply begin receiving data?
	Start Code
Start code value to listen out for, range 0-255
	Simulation
	Scope Traces
Selects if the scope traces are automatically added to the data recorder window or not. Simulation - draws an approximation of the UART data onto the scope trace. ICT - sets up the scope trace for incoming data and adds UART packet decoding at the correct BAUD.
	Console Data
Selects if the console data is automatically generated or not
	Console Columns
Number of characters that can be displayed on a single line of the console.
	Data Source
Simulation data source used to allow the component to connect to various remote devices Nothing - Simulation data is ignored COM port - Routes the communication data to and from a physical or virtual COM port Injector - Routes the communication data via a data injector component on the Panel.

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+| width="90%" class="mtx-class-macrohead" | '''GetDataChannel'''
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 | colspan="2" | Gets the data byte from a data channel&nbsp;
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-| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Initialise'''
+| width="90%" class="mtx-class-macrohead" | '''Initialise'''
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 | colspan="2" | Configures the UART serial interface.&nbsp;
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-| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''ReceiveDataChain'''
+| width="90%" class="mtx-class-macrohead" | '''ReceiveDataChain'''
 |-
 | colspan="2" | Waits for a BREAK, MAB and StartCode followed by the contents of the data channels. Returns 0 to indicate a timeout and 1 to indicate succesful reception.&nbsp;
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-| width="90%" style="background-color:#D8C9D8; color:#4B008D;" | '''Properties'''
+| width="90%" class="mtx-class-macrohead" | '''Properties'''
 |-
 |-
-| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
+| width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]]
-| width="90%" style="background-color:#EAE1EA; color:#4B008D;" | Serial Properties
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-| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
+| width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]]
-| width="90%" style="background-color:#EAE1EA; color:#4B008D;" | DMX Properties
+| width="90%" class="mtx-class-propfolder" | DMX Properties
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 | colspan="2" | Start code value to listen out for, range 0-255&nbsp;
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-| width="10%" align="center" style="background-color:#EAE1EA;" | [[File:Fc9-conn-icon.png]]
+| width="10%" align="center" class="mtx-class-propfolder" | [[File:Fc9-conn-icon.png]]
-| width="90%" style="background-color:#EAE1EA; color:#4B008D;" | Simulation
+| width="90%" class="mtx-class-propfolder" | Simulation
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