High-speed interface and low-speed interface switching circuit and method based on FPGA (Field Programmable Gate Array)

Abstract

The invention provides a high-speed interface and low-speed interface switching circuit and method based on an FPGA (Field Programmable Gate Array). The high-speed interface and low-speed interface switching circuit based on the FPGA comprises a high-speed parallel interface module, a high-speed writing control module, a high-speed reading control module, a first data caching FIFO (First In First Out) reading-writing module, a second data caching FIFO reading-writing module, a low-speed reading control module, a low-speed writing control module, a parallel-series switching module, a series-parallel switching module and a low-speed serial interface module. According to the high-speed interface and low-speed interface switching circuit and method based on the FPGA disclosed by the invention, the problem that data rates and interface protocols of a high-speed parallel interface and a low-speed serial interface are not matched in an embedded system can be solved, and meanwhile, full-duplex communication can be realized; and when an Xilinx Virtex-5 series FPGA is adopted, occupied logic resources are few and system integration is easy to realize.

Description

technical field [0001] The invention relates to a conversion circuit and method between different interface buses and different clock domains in a digital circuit system, in particular to a high-speed parallel interface and low-speed serial interface conversion circuit and method based on a field programmable gate array (FPGA). Background technique [0002] Reliable transmission of a large amount of data between different interface buses and different clock domains in digital circuit systems has always been a key issue in digital circuit design; in order to achieve reliable exchange of data between different interface buses and different clock domains, avoid The metastable problem caused by the interface conversion circuit is essential. At present, there are various types of special-purpose interface conversion chips on the market, but the special-purpose interface conversion chips cannot be reconfigured, have a single structure, and have poor flexibility. With the rapid de...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a high-speed interface and low-speed interface conversion circuit and method based on FPGA, which can solve the problem of data rate and interface protocol mismatch between high-speed parallel interface and low-speed serial interface

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