Abstract: This paper explores the design of communication test system based on the PC104 IPC processing platform.As for software,the popular QNX real-time operating system is used;as for hardware,the CPCI bus technology is used.Through fully using the greatest potential of both aspects,the test system with good performance is successfully designed and implemented.In addition,under the real-time system the methods described in this paper are also to provide reference for a variety of bus standards to achieve communication between the boards.

Key words: QNX, CPCI bus, real-time systems