Orthogonal signal decoding system and method based on cortex core microcontroller

Abstract

The invention relates to an orthogonal signal decoding system based on a Cortex core single-chip microcomputer. The orthogonal signal decoding system comprises a rectifying filtering circuit, an isolation switching circuit and the Cortex core single-chip microcomputer which are sequentially electrically connected. A decoding method comprises the following specific steps: the timer of the Cortex core single-chip microcomputer is set into a decoder port working mode; orthogonal signals are accessed to the rectifying filtering circuit to be rectified and filtered and then are sent to the isolation switching circuit to be converted into level signals, and then the level signals are sent to the timer port of the Cortex core single-chip microcomputer; the timer of Cortex core single-chip microcomputer counts the detected level signals; a register value stored in the timer of the Cortex core single-chip microcomputer is S0, and the register value is S1 after time T; at the moment, the frequency F of the orthogonal signals to be decoded is obtained, F= (S1-S0) / T, namely the decoding of the orthogonal signals is completed. The method is simple, the production cost of the system is low, and the system stability can be increased.

Description

technical field [0001] The invention belongs to the technical field of orthogonal signal decoding, and in particular relates to a decoding system and method of an orthogonal signal based on a Cortex core single-chip microcomputer. Background technique [0002] The quadrature (encoded) signal can effectively eliminate the interference caused by the pulse edge oscillation. Therefore, the orthogonal (encoded) signal has good anti-magnetic interference performance, high precision, fast response, easy to identify the direction and position of the turntable, etc. Taking advantage of excellent performance, the quadrature (encoded) signal has been widely used in industrial control and other fields. It is very important to measure the direction and speed of the quadrature (encoding) signal, which is related to the smooth operation of the entire system and the accuracy of the motion state and position. However, the current decoding system for the orthogonal coded signal is still stag...

AI Technical Summary

Problems solved by technology

In addition, the stability of the dedicated chip will also affect the stable operation of the entire motherboard.

[0005] It can be seen that the existing decoding methods for orthogonal (encoded) signals are complicated, and the decoding system not only has high production costs, but also has poor stability

Images