Simulink DDS Block Set By Mark McBroom

What is DDS? “Data Distribution Service” OMG Standard IDL data interface definition Publish-subscribe anonymous communication Targeted for high-performance and real-time systems Deterministic Data Delivery Highly configurable Supported OS’s: Windows, Linux, VxWorks, Integrity Multiple vendors : Free and paid implementations RTI DDS PrismTech Opensplice Twin Oaks OCI OpenDDS

Simulink/DDS Integration Goal 1: Allow Simulink simulation to participate in a DDS-based system Simulink model MATLAB model ( future? ) Goal 2: Code generated from Simulink model complies with DDS API.

DDS Blockset Supports both Simulation and Code Generation DDS Topic Type  Simulink Bus QoS via XML profiles Based on RTI implementation. Working with RTI. OpenSplice support is possible MATLAB support is possible Implemented as inlined C S-Functions

DDS Blockset Dynamic Data API avoids need to compile DDS S-Functions code when changing Topic Types Introduces performance penalty Block dialog for setting key params, selecting QoS Library and profile Limitations Listeners not supported Simulink Accelerated mode not supported Wait-set conditions ( except for timeout) hard coded. No topic filtering Nested arrays of Buses (structs). Working with RTI to resolve. Topic keys not supported Strings, sequences not supported