A real-time data transmission method of pci data bus

Abstract

The invention discloses a real-time data transmission method of a PCI data bus. A dual-port SDRAM chip is used as a bridge between the FPGA chip and the PCI interface chip, thereby realizing real-time data transmission between the FPGA chip and the PCI bus, and ensuring that the FPGA chip can read The space for data is strictly separated from the space for writing data by computer software, which ensures real-time and uninterrupted transmission of data.

Description

technical field [0001] The invention relates to a real-time data transmission method of a PCI data bus. Background technique [0002] In foreign countries, discussions and reports on digital demodulation systems appeared in the 1980s, and digital demodulation design ideas based on System On Chip (SOC) and software radio technology gradually appeared after the 1990s. Some companies have launched digital demodulation products one after another. In 2007, Pentek of the United States successfully launched the powerful Model 7142-428 software radio processor, which not only includes 14-bit 125MHz 4 AD and 1 DA conversion channels, but also designs a multi-band digital down-conversion core , which can realize the extraction range of 2-65536, and also has an interpolation filter with an interpolation range of 2-32768; a series of software wireless processor products launched by Pentek provide superior solutions for wireless communication and other systems. In the research and deve...

AI Technical Summary

Problems solved by technology

However, the high cost of hundreds of thousands or millions is unbearable for test equipment, and it can only be used as experimental equipment.

Now some universities and companies in China have also begun to develop boards and equipment in this area, but the functions of such equipment are relatively single, and they can only work under fixed modulation and demodulation mode, symbol rate and carrier frequency

In the development of test equipment, for the different parameter requirements of test equipment, there is no universal and cost-effective modulation and demodulation test platform, and high-efficiency solutions for project design and development. Only the expensive foreign general-purpose models can be selected. Domestic modem boards with a single product or performance, in the process, the procurement cycle becomes longer and the product cost rises sharply, seriously affecting product development and delivery

At the same time, in such a development mode of modem test equipment, different test parameter requirements make the development parameters of test equipment different, making the development of each test equipment independent of each other, unable to form economies of scale, and difficult to master core technologies

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