Method for receiving data of absolute encoder through STM32 microcontroller

Abstract

The invention discloses a method for receiving data of an absolute encoder through an STM32 microprocessor. An SSI is adopted for the absolute encoder to output collected data, the absolute encoder comprises two chips 422 with a data transceiving function, a data output port of the absolute encoder is connected with a data input port of a single-chip microcomputer through the chips 422, and a pulse output port of the single-chip microcomputer is connected with a clock interface of the absolute encoder through the chips 422; the microprocessor outputs pulse signals through the pulse output portand sends the pulse signals into the absolute encoder via the chips 422, the absolute encoder sends the data of the encoder at rising edges of pulses, and the single-chip microcomputer collects the data sent from the encoder at the rising edges of the signals according to the output pulse signals. The method has the advantages that data transmission and reading can be controlled through the cooperation of the chips 422 and the output pulse signals on hardware, the data of the absolute encoder with the ssi is conveniently read at the stm32 microprocessor, and the method is easy to implement, low in cost and capable of conveniently receiving and reading the data.

Description

technical field [0001] The invention relates to the field of data transmission and reading, in particular to a method for STM32 to receive data from an absolute encoder with an SSI interface. Background technique [0002] An encoder is a device that converts angular displacement or linear displacement into an electrical signal, and is divided into absolute value type and incremental type. At present, the price of an absolute value encoder is about 4 times that of an incremental encoder, and 70% of the applications in the domestic market are relatively economical incremental encoders. In high-precision mechanical equipment or heavy industries such as steel, ports, and hoisting, absolute encoders are used in more cases due to relatively high requirements for measurement accuracy. In these heavy industry applications, due to the relatively harsh working conditions, the requirements for the encoder's shock and vibration resistance are relatively high. [0003] The absolute enc...

AI Technical Summary

Problems solved by technology

Although the emerging bus-type absolute encoder has the advantages of simple connection and strong versatility, it is expensive, and the development of hardware and software is complicated, so it is difficult to completely replace the SSI communication method

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