: Large portion of embedded system development process is the integration of hardware and software. Unfortunately, the communication across the hardware/software boundary is tedious and error-prone to create. This paper presents automatic hardware/software interface generation system. As the front-end of hardware/software codesign frameworks a system designer defines XML specifications for hardware functions. Our system generates hardware/software interfaces including Device Driver, Driver API, and Device Controller from these specifications. Embedded software designers can easily use hardware just like system libraries. Our system reduces the mistakes and errors that can be produced when a software programmer directly connects software to hardware, and supports balancing labors between hardware developers and software programmers. Moreover, this system can be used as the back-end for hardware/software codesign framework.