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Heterogeneous hierarchical architectures result from the interconnection of several heterogeneous MPSoCs through an efficient communication infrastructure. Each communication between two processing units requires the use of hardware devices managed by a software driver responsible to initialize, handle and complete the communication. This paper describes a multi-device driver synthesis flow based on available communication paths of the architecture. A small set of generic driver templates is available in a driver library. The flow is in charge to select one correct driver template from the library, and then to configure and specialize it in order to produce the source code. The effectiveness of our approach is illustrated by a significant example.