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The majority of automotive companies have evaluated the overhead associated with automatic code generation (as compared to manual coding), and many have found it to be within acceptable production limits, and in some cases the automatic generated code can be more efficient than manual code. They now want to harness this capability directly with the OSEK Operating System. This paper describes the use of an OSEK/VDX Real-Time Operating System (RTOS) and an open, integrated development tools platform to allow a development downflow for high-level Computer Aided Software Engineering (CASE) design entry and simulation/validation, rapid prototyping down to the target hardware for calibration and debugging and the up-flow by feeding the data collected from the target Electronic Control Unit (ECU) for system analysis and debugging all the way back to the entry CASE level.