PCI (Peripheral Component Interconnect) interface and data transmission method thereof under FPGA (Filed-Programmable Gate Array) environment

Abstract

The invention discloses a multipurpose PCI interface and the data transmission method thereof under an FPGA environment. A method for implementing the PCI interface with the DMA (Direct Memory Access) function is adopted, and the interface is independently implemented through a PCI master device module, a PCI slave device module and a PCI register module. A simple FIFO (First Input First Output) interface easy to implement is adopted and used for a PCI user-side interface, DMA control details are concealed from a user, and the design complexity of the user interface is reduced. In high-capacity data transmission, data are encapsulated according to a data format required by the interface and can be realized in a DMA way by being simply written into FIFO, the control logic complexity is simplified, and the efficiency of development of the user interface is improved.

Description

technical field [0001] The invention relates to a multi-purpose PCI interface under FPGA environment and a data transmission method based on the interface. FPGA is an abbreviation of Field-Programmable Gate Array, that is, Field Programmable Gate Array. Background technique [0002] PCI (Peripheral Component Interconnect) is a bus structure introduced by SIG (Special Interest Group). Since 1992, Intel, HP, IBM, Apple, DEC, Compaq, NEC and other well-known manufacturers joined in and reorganized. The 32-bit PCI bus appeared as a substitute for the low-speed bus used by PCs such as ISA / EISA. The reason why it has become the mainstream of the local bus is determined by some remarkable characteristics it has. details as follows: [0003] (1) High transmission efficiency and good scalability [0004] The typical operating frequency of the PCI bus is 33MHz and supports 66MHz expansion. It has a bus width of 32 bits and can be extended to 64 bits. When many peripherals are con...

AI Technical Summary

Problems solved by technology

The former method needs to redesign the entire PCI interface, and requires a deep understanding and grasp of the PCI interface protocol. The development time cycle is long and difficult; the latter method has improved the development cycle and difficulty, but the cost of purchasing chips is still It will increase the development cost, and the user interface it provides will still be a bit complicated, of course, this is at the expense of relatively high flexibility

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