MATLAB: How to make an array of bus signals in Simulink

arraybussimulinkstateflowstructtype

I would like to create an array of bus signals.

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This enhancement has been incorporated in Release 2010b (R2010b). For previous product releases, read below for any possible workarounds:

The ability to have an array of bus signals is not available in Simulink.

To work around this issue, you can create an array of Simulink.StructType signals. However, individual signals cannot be selected from the Simulink.StructType signal as they can with buses.

To work around that limitation you can write an S-Function that will recognize the Simulink.StructType datatype (see S-Function SIMSTRUCT.H), select individual signals, and output the signals as other datatypes and signals in Simulink.

If you would still like to use Buses and Bus Selector blocks, consider creating a nested bus rather than a bus array as shown below:

 busarray_signal
+bus1
+bus2
+bus3

Where bus1, bus2, and bus3 would all have the same bus structure.

Related Solutions

MATLAB: How to retrieve names of signals in a bus when the signal names have been propagated by Simulink

This enhancement has been incorporated in Release 2010a (R2010a). For previous product releases, read below for any possible workarounds:

The ability to use a command-line command to retrieve the names of propagated signals in a bus signal is not available in Simulink.

To work around this issue, use the following code:

busdemo
ph = get_param('busdemo/Bus Creator', 'porthandles')
set_param(ph.Outport, 'CacheCompiledBusStruct', 'on')
busdemo([],[],[],'compile')
bs = get_param(ph.Outport, 'CompiledBusStruct')
busdemo([],[],[],'term')

The variable 'bs' will contain information on the bus signal coming out of the Bus Creator. You can recursively walk through this structure to determine all actual sources of the bus and hence all source data types, dimensions, signal names, etc.

Note that the following code makes use of the internal compiled property 'CacheCompiledBusStruct' and hence is subject to change in future releases.

Another workaround to retrieve the names of signals in a bus is to pass all the Bus Creator outputs to a Bus Selector block, which selects all of the signals from the Bus Creator block, then use the following code to extract the signal names, where the Bus Selector block is the currently selected block:

get_param(gcb, 'OutputSignals')

MATLAB: Can I split the fields of a Simulink.Structtype signal into separate signals in Simulink 7.2 (R2008b)

You can gain this functionality through the use of an S-function. The way to do this is to create another S-function whose purpose would be to select the signals of interest from the StructType and output them/it as such. There are no ‘selectors’ for the StructType signal. You may wish to use a bus and bus-selector block

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Related Solutions

MATLAB: How to retrieve names of signals in a bus when the signal names have been propagated by Simulink

MATLAB: Can I split the fields of a Simulink.Structtype signal into separate signals in Simulink 7.2 (R2008b)

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