Abstract:According to the research and product development needs of the PBX system for low-orbit satellite communication networks, it is necessary to design an adapter module based on microwave switch for this system that adheres to the PXI bus standard, along with the specialized device driver for this module. The adapter module uses the PCI9052 bus bridge circuit to achieve PXI bus access functionality and utilizes domestically produced FPGA circuit to implement the adapter"s interface logic. When designing the device driver, mechanisms such as Event object, Timer object, and DPC routine supported by the operating system were utilized to achieve safe operation management for microwave switch access, addressing the synchronization and mutual exclusion requirements. After the project development was completed, tool software was used to test the operation process and function of the microwave switch adaptor module and its device driver, which met the expected goals.