Improvement of Tinyos Implementation for Small Memory Fpga System

We used FPGA for developing prototypes of novel sensor network system because of its short turn-around-time and flexibility. For FPGA-based sensor network system, we have to decrease the size of operating system because of small memory. Scalability is another important feature because if logic circuit in the FPGA is changed, the operating system also has to reflect this modification. In this paper, we discuss a way to implement TinyOS as an operating system in FPGA based sensor system with module-integration and discarding unused codes of TinyOS. This implementation can ensure scalability of TinyOS and drop down the code-size.