A Model-Based Methodology to Generate Code for Timer Units

In this paper we present a model-based methodology and a tool-chain supporting pseudo-automated code generation for different Timer Units, which represent a new approach in this field. Programmable Timer Units are timing co-processors used to elaborate complex high-resolution timing functions subject to hard real-time constraints. Verification at the different design stages, as required per safety standards' certification, is becoming a major concern for Timer Units code development life-cycle. Enabling correct-by-construction code generation, our methodology supports code development, integration and testing across all design phases. We show how high-level functional models derived from functional requirements can be mapped onto the target architecture and how architecture-specific code can be generated. Our methodology is then applied to an automotive reference example.