Programming fieldbus nodes: a RAD approach to customizable applications

The European installation bus (EIB), part of the KNX standard, is a field bus for home and building automation. Bus coupling units (BCUs) provide a generic platform for embedded nodes based on the M68HC05 microcontroller family. A set of open source tools for developing and downloading BCU programs based on the GNU tool chain is presented. It uses a RAD-like (rapid application development) approach. The tool set also supports separating application development and deployment and includes a multi-user and network-capable daemon for EIB access and network management. Issues in porting the GNU C compiler to the target platform are highlighted