A multi-channel digital input and output device based on fpga

Abstract

The invention discloses a multichannel digital quantity input and output device based on an FPGA. The multichannel digital quantity input and output device comprises a multichannel input and output module and an FPGA control module. The multichannel input and output module is connected with a plurality of IO interfaces of the FPGA in the FPGA control module. The multichannel input and output module collects digital quantity input signals of multiple channels. The FPGA control module receives the digital quantity output signal from each IO interfaces by means of the FPGA and controls the multichannel input and output module to output the required digital quantity signals. The multichannel digital quantity input and output device has the advantages that the structure is simple and compact, the needed cost is low, a large digital quantity IO communication function is supported, and multi-channel digital quantity signal input and output wide in voltage level range are realized, the occupied communication resources are fewer, and the communication speed is high.

Description

technical field [0001] The invention relates to the technical field of digital input and output, in particular to an FPGA-based multi-channel digital input and output device suitable for IO communication with a large amount of data. Background technique [0002] At present, digital input and output are usually implemented based on single-chip microcomputer or other sequentially executed embedded processors, that is, input modules and output modules need to be set, and single-chip microcomputers are used as processors or embedded processors configured to execute sequentially. The processor starts from the input module Process the digital signal after it is collected, and output the digital signal from the output module to realize the function of digital input and output. However, when the above-mentioned digital input and output methods are used, due to the limited number of IO pins of single-chip microcomputers or other embedded processors, they can only be applied to IO com...

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Problems solved by technology

However, when the above-mentioned digital input and output methods are used, due to the limited number of IO pins of single-chip microcomputers or other embedded processors, they can only be applied to IO communications with small amounts of data, and cannot meet the requirements for IO communications with large amounts of data; and In order to adapt to IO communication with a large amount of data, at present, multiple input and output modules are usually combined and applied, and then the control of each module is realized through bus communication. This kind of method is complicated to implement and occupies a lot of communication resources. It can receive data in sequence, process data, configure IO output, cyclically scan IO status, send IO status information, etc. Therefore, the above digital input and output methods still have the problem of low IO communication rate

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