PCIe is an I/O interconnect interface that supports multiple data paths and enables high-speed data transfer between multiple devices.In this paper,PCIe is utilized as a crucial component for data transmission be-tween CPU and FPGA as well as between CPU and DSP.A notification mechanism is designed and implemented through transportation and improvement of the XDMA-based and DSP-based CPU driver,achieving interconnection between CPU and FPGA as well as between CPU and DSP.The radar front-end control program of a project is de-veloped based on the proposed communication scheme,allowing for millisecond-level CPI parameter control.This paper provides reference for using CPU in time-sensitive radar application development scenarios.
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