PCIe bus-based master-slave interactive communication platform and method

Abstract

The invention relates to the technical field of communication, and provides a PCIe bus-based master-slave interactive communication platform and method. The platform comprises a host and a development board, wherein both the host and the development board are equipped with PCIe2.0X4 interfaces; master equipment and slave equipment are configured in the host and the development board; the host is used for configuring interactive communication data size and setting the master equipment and the slave equipment; interactive communication between the host and the development board adopts a query mode or an interruption mode; a memory applied on the host comprises a data cache and a descriptor table cache; the data cache is applied in a chained DMA manner; the descriptor table cache is applied in a continuous DMA manner; the data cache consists of memory pages, physical addresses of which are discontinuous; a descriptor table is formed by information of a plurality of discontinuous memory pages; and the descriptor table comprises a head item which is used for updating EPLAST information of communication ending information. According to the platform and the method, the PCIe bus-based master-slave interactive communication is realized, the bus efficiency is improved and the broadband performance maximization is realized.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a PCIe bus-based master-slave interactive communication platform and method. Background technique [0002] With the rapid development of science and technology, high-speed data interaction has been applied to many occasions. PCI-Express is a general-purpose bus specification, which includes not only display interfaces, but also various application interfaces such as CPU, PCI, HDD, and Network. In this way, like Hyper-Transport, it can be used to solve the bottleneck problem of data transmission in the current system, and make full preparations for the performance improvement of peripheral products in the future. In the past, various devices in the computer system shared the same bandwidth and adopted parallel interconnection, which greatly affected the overall performance of the system. At the same time, the mutual interference of parallel signals seriously res...

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Problems solved by technology

[0003] The object of the present invention is to provide a kind of master-slave interactive communication platform based on PCIe bus, aims at solving the problem that PCIe bus is only used for one-way transmission in the prior art, and there are various design defects, which reduces bus efficiency question

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