关键词: ?PCIE总线, PCIE交换电路, 高速数据传输, 丢包率

Abstract: With the maturity and more and more applications of peripheral component interconnect express (PCIE) technology, the traditional PCIE bus ‘point to point’ transmission cannot satisfy the needs of high-speed data transmission between different devices, so it is necessary to research PCIE data exchange technology. A PCIE switching circuit with domestic CPU as the core is designed in order to carry out high-speed data transmission of PCIE bus more conveniently and efficiently, and the hardware design scheme and test method are introduced in detail. Under the condition that the PCB can work normally, the magnitude of the ping package(up to 115200) is gradually increased, and the transmission time and packet loss rate are less than 10 ms and 5×10^-4 after stable operation for at least 30 minutes. It verifies the feasibility and reliability of the design.

Key words: PCIEbus, PCIEswitchingcircuit, high-speeddatatransmission, packagelossrate