Development of Complex KNX Devices
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1 Development of Complex KNX Devices Complex KNX Devices Device Models Solutions for Linux and WinCE Quick Client Development with ios KNX Product Database Generation Weinzierl Engineering GmbH Jason Richards, BInfTech Tyrlaching Weinzierl Engineering GmbH, November
2 Weinzierl Engineering GmbH 100 km from Munich KNX Stack Implementations KNX Devices Development Services Development Tools Weinzierl Engineering GmbH, November
3 Development of Complex KNX Devices Complex KNX Devices Device Models Solutions for Linux and WinCE Quick Client Development with ios KNX Product Database Generation Weinzierl Engineering GmbH, November
4 Complex KNX Devices Complex KNX Model Defines its complexity in terms of its KNX resources Group Objects, ETS Parameters approaching or greater than 255 Weinzierl Engineering GmbH, November
5 Complex KNX Devices Complex KNX Application Defines its complexity outside of KNX Platform Resources, OS Primitives External software components Shared or Dynamic Libraries Linux or Windows CE Weinzierl Engineering GmbH, November
6 Complex KNX Devices Checklist Choice of Platform and Development Environment Skills, experience, extant products and platforms? Device and Application Type Complex model, complex application or both? Device Model System B or System 7? KNX Media Access Type Twisted Pair, KNXnet/IP? Weinzierl Engineering GmbH, November
7 Development of Complex KNX Devices Complex KNX Devices Device Models Solutions for Linux and WinCE Quick Client Development with ios KNX Product Database Generation Weinzierl Engineering GmbH, November
8 Device Models System 7 Most widely adopted Device Model Good balance (complexity vs size) Group Objects: 255 Group Addresses: 254 Property Based Device Management Memory Layout: Load Controls Twisted Pair and KNXnet/IP Weinzierl Engineering GmbH, November
9 Device Models System B Adopts aspects from System 7 System management via interface object properties Re-locatable memory management Memory range: 20bit addressing: 1MB Memory sub-segments: selective download KNX Resources: up to Requires additional algorithms at runtime to find objects: linear search too slow Twisted Pair and Powerline Weinzierl Engineering GmbH, November
10 Device Models KNX Device Model Resources: an overview System 7 System B Group addresses Group objects Loadable memory ~30 kb ~1MB Weinzierl Engineering GmbH, November
11 Development of Complex KNX Devices Complex KNX Devices Device Models Solutions for Linux and WinCE Quick Client Development with ios KNX Product Database Generation Weinzierl Engineering GmbH, November
12 Solutions for Linux and WinCE The case for Linux and WinCE Greater range of options for application development Increased system resources More languages: C++, C#, python etc Available code-base (applications, libraries) High performance Scalable Wide range of hardware interfaces Weinzierl Engineering GmbH, November
13 Solutions for Linux and WinCE KNX Stack for Linux and WinCE KNX Stack Core standard proven solution, in C Platform Abstraction Layer native POSIX, BOOST etc Client-Server Model Server owns KNX resources Client implements application RPC Communication TCP/IP Sockets Weinzierl Engineering GmbH, November
14 Solutions for Linux and WinCE Connection to the KNX Network Currently, the KNX media type will dictate the Device Model, and hence the available KNX resources System 7 System B Twisted Pair B0 KNXnet/IP 5705 Not yet Specified Weinzierl Engineering GmbH, November
15 Solutions for Linux and WinCE TP-UART Emulation Module Hardware Module with Transceiver and Microcontroller Non-real time interface to the Host Dedicated kernel driver is not required Non-selective L2-ACK Module responsible for all ACK decisions All Group Messages are accepted Individually addressed frames are filtered Weinzierl Engineering GmbH, November
16 Solutions for Linux and WinCE USB Interface The equivalent of embedding a KNX USB Interface directly into your device KNX side is Twisted Pair Device side is USB with EMI1 Weinzierl Engineering GmbH, November
17 Solutions for Linux and WinCE Internet Protocol KNXnet/IP Standard IP components Ethernet controller, TCP/IP Stack IP is ubiquitous Found everywhere Ideal for complex installations Where Ethernet is available System 7 Only More work is required to enable the development of devices with greater resource requirements Weinzierl Engineering GmbH, November
18 Solutions for Linux and WinCE Remote Procedure Call Interface Binary Request/Response Protocol Standard TCP/IP Socket Communication Separate asynchronous event indication channel Local or remote client applications KNX Stack API is (almost) identical Weinzierl Engineering GmbH, November
19 Solutions for Linux and WinCE Remote Procedure Call Architecture Weinzierl Engineering GmbH, November
20 Solutions for Linux and WinCE RPC Client Library Language Bindings Reference Implementation in C Berkeley Sockets API Language Bindings for C++ Auto error handling via Exceptions Language Bindings for Python Rapid prototyping Weinzierl Engineering GmbH, November
21 Development of Complex KNX Devices Complex KNX Devices Device Models Solutions for Linux and WinCE Quick Client Development with ios KNX Product Database Generation Weinzierl Engineering GmbH, November
22 Quick Client Development with ios iphone Push Button Demo Build RPC static library for ios Create GUI with Interface Builder Add event handler for switches Connect / Disconnect KnxStack Add indication receive thread Read value and update GUI Finished! Time to implement: 3 hours Weinzierl Engineering GmbH, November
23 Development of Complex KNX Devices Complex KNX Devices Device Models Solutions for Linux and WinCE Quick Client Development with ios KNX Product Database Generation Weinzierl Engineering GmbH, November
24 KNX Product Database Generation KNX Manufacturing Tool (MT4) and ETS4 A Product Database describes the Application Program Communication Objects, Parameters, Binary Data Created with KNX Manufacturing Tool Data exchange with ETS4 and MT4 is XML Opens new possibilities for working with these tools Weinzierl Engineering GmbH, November
25 Development of Complex KNX Devices Conclusion Diverse range of requirements impact on system design Open platforms can reduce time to market through Available software Future-proof flexible platform Complex application domains are possible with System B E.g. IP Telephony and Multimedia Via extended KNX resources Complexity of application should not be reflected in complexity of development! Weinzierl Engineering GmbH, November
26 Development of Complex KNX Devices Thanks for your attention! Weinzierl Engineering GmbH, November
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