Digital encoder interrupt filtering method based on linux platform

Abstract

The invention provides a digital encoder interrupt filtering method based on a linux platform. The method comprises the following steps of S1, configuring a read function and a query function in a write device driver on a system driver layer, and registering a device, S2, configuring an opening function in the write device driver, and initializing an input / output interface, S3, registering an interrupt function so as to generate interrupt when the first pulse signal is at a rising edge or a falling edge, and S4, configuring a poll function, enabling the interrupt function to judge whether conversion of the first pulse signal is correct or not according to a second pulse signal, if the conversion of the first pulse signal is correct, enabling the interrupt function to send a stepping signal to the poll function and modify level triggering, and transmitting parameters to the read function. Aiming at the problem of interference processing of a digital encoder in the prior art, low hardware cost and low complexity are achieved, and the bit error rate can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of digital encoder signal processing, and in particular relates to an interruption filtering method of a digital encoder based on a linux platform. Background technique [0002] An encoder is a device that compiles and converts signals or data into signal forms that can be used for communication, transmission and storage. Existing digital encoders are mostly designed based on single-chip microcomputers, which can convert mechanical displacement into electrical signals, which can be used to measure the length, angle, position or speed of objects, and are widely used in papermaking and printing machinery, testing instruments, automatic machinery, transportation System, pressure control, test bench, speed measurement and other fields. [0003] In the field of industrial control and other fields, there is a high requirement for the stability of the equipment, and the digital encoder is inherently accompanied by...

AI Technical Summary

Problems solved by technology

The traditional query method needs to continuously detect the level signal of the input and output (I / O) pins, which takes up more processor resources and cannot determine the delay time for the user program to read the underlying I / O. The detection information is lost in the process; while the edge-triggered interrupt method is limited by the mechanical rotation characteristics of the digital encoder, the bit error rate is high, and the error is also large

[0006] In view of this, the existing technology should be improved to solve the technical problems of high hardware cost, high software complexity, and high bit error rate in solving digital encoder interference based on the linux+arm platform

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