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Modern automotive embedded systems are characterized by timing constraints at different levels in the design hierarchy and flow. System-level functions like modern active-safety functions are characterized by end-to-end constraints that span several ECUs and buses. ECU-level functions, like fuel injection controls need to cope with stringent resource requirements, tight time constraints and event-driven computations with different execution modes. This paper introduces some of the models, the techniques and the tool integration methods developed in the context of the INTERESTED project to guarantee timing correctness at all levels in the flow. In addition, we outline the issues arising from the application of these techniques to a fuel injection case study.

The paper describes the components of an envisioned open source framework that supports several stages in the model-based development of two- and three-wheelers software controls. The proposed solution supports the runtime execution on an OSEK-compatible [8] real-time operating system for multicore platforms. The framework consists of a modeling and simulation tool (including hierarchical state machines) and a code generator for the development of the functional model of controls and the definition of their task implementation; an OSEK/AUTOSAR operating system and device driver stack; OS and I/O configuration tools. The platform has been released open-source under an industry-friendly license. Our framework is currently in use for the development of innovative two-three wheelers control systems at Piaggio. In this paper we describe the experience matured in the application development, the benefits and current limitations of the approach.