ASI communication slave computer implementation method based on single-chip microcomputer transceiving control

Abstract

The invention discloses an ASI communication slave computer implementation method based on single-chip microcomputer transceiving control. The method comprises steps that a request message signal which is sent by a main station and is transmitted by an ASI bus signal transmission system is received by a single-chip microcomputer; reception processing on the received request message signal is carried out by the single-chip microcomputer, request message data is acquired through decoding recovery, frame verification is carried out according to requirements of an ASI communication protocol, and corresponding processing is carried out based on the request message data to generate response message data; sending processing on the response message data is carried out by the single-chip microcomputer, a response message signal corresponding to the response message data is acquired through coding, and the response message signal is sent to the ASI bus signal transmission system. The method is advantaged in that the single-chip microcomputer is utilized to replace a traditional ASI special-purpose slave computer chip to realize functions of an ASI communication slave computer, ASI communication signals can be accurately received and sent, and slave computer response is accomplished within the prescribed time.

Description

technical field [0001] The invention relates to an ASI field bus technology. Background technique [0002] ASI (actuator–sensor interface) is a device-level fieldbus proposed by some low-voltage electrical companies such as Siemens to provide a unified digital interface for various sensors, actuators and low-voltage electrical appliances at the lowest device layer. It is a bus protocol with one master and multiple slave structures, which has been included in the national standard (GB / T 18858 / IEC 62026). [0003] Generally, the implementation of ASI slaves can be divided into two types: one is an intelligent sensor / actuator with an ASI communication interface, which uses an ASI slave dedicated chip inside the product, plus some peripheral chips and E2PROM memory to form a whole The other is a separate structure, which is composed of a specially designed ASI I / O interface module and an ordinary sensor / actuator. The I / O interface module has a dedicated circuit for the slave. T...

AI Technical Summary

Problems solved by technology

In the standard industry application of ASI, there is a requirement to support multi-bit streams. At present, there is no dedicated chip that supports complex applications such as multi-bit streams in the market. Only a series of commands can be issued through the host computer to control different DIs. , DO and P parameter state combinations to achieve multi-bit transmission, the host program is complex

Therefore, the use of ASI slave-specific chips for development is not conducive to the product development of complex application functions, the implementation of custom functions, and the provision of comprehensive fault diagnosis. In short, the product development and implementation are not comprehensive and flexible enough.

For example: Many products need to purchase a handheld programming panel or use the ASI master station to set the slave station site, which cannot be set through its own interface or a custom communication interface, which increases the cost and cumbersomeness of use; when exceeding a single ASI In the product application of DI / DO points (maximum 4 points) supported by special chips, it is necessary to use multiple ASI dedicated slave station chip solutions to expand DI / DO points, and different hardware needs to be designed, which increases the product development cost and cycle , and the fault and diagnostic information provided is not comprehensive enough, and so on; based on the above, it is necessary to develop a slave with autonomous processing of the ASI protocol

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