Embedded system design specification: merging reactive control and data computation

We have presented two language extensions for C and Java for embedded system specification, simulation and implementation. The two languages JESTER and ECL build upon the ESTEREL synchronous semantic foundation that provides support for waiting, concurrency and preemption. They nicely support specification of mixed control/data modules. The compilation is performed by splitting the source code into reactive ESTEREL code (as large as possible, in the current implementation) and data-dominated C or Java code. The large reactive portion can be robustly optimized and synthesized to either hardware or software, while the C residual code must be either implemented in software as is or the user must provide a a hardware implementation