LonWorks node multi-I/O device based on nerve cell chip

Abstract

The invention relates to a LonWorks node multi-I/O device based on a nerve cell chip, which solves the problem of difficulty in driving multiple I/O devices caused by lack of general I/O pins provided by the nerve cell chip under the condition of not introducing other processors. An application node hardware circuit comprises the nerve cell chip and peripheral circuits, the designated I/O interface of the nerve cell chip is connected with a plurality of buffers and latches through at least one chip select unit; the buffers and latches are respectively connected with one I/O device, and the designated I/O interface of the nerve cell chip is also directly connected with the buffers and latches; the implementation of the multi-I/O device based on nerve cell chip LonWorks node is composed of the following steps that each I/O device module selects the connection mode with the nerve cell chip; each I/O device module designs the interface circuits and decoding circuits; an application system designs the software implementation scheme.

Description

technical field [0001] The invention relates to the I / O expansion technology in the communication field, in particular to an I / O expansion technology based on a Neuron chip applied in the LonWorks field bus. Background technique [0002] LonWorks fieldbus technology supports a variety of communication media in terms of hardware, has a powerful processor neuron chip, and supports all seven-layer communication protocols of the ISO / OSI model in terms of software and object-oriented design methods. It is used in industrial control, building automation, It is widely used in security protection and other fields. [0003] The neuron chip provides 11 general-purpose I / O pins, using the Neuron C language, which can be programmed to set the I / O pins to 34 different I / O objects, which is the link between the application I / O device and the neuron chip. provide a common interface. In general application systems, external I / O devices are usually accessed by using I / O objects, but in sys...

AI Technical Summary

Problems solved by technology

In general application systems, external I / O devices are usually accessed by using I / O objects, but in systems that need to connect multiple external application I / O devices, 11 I / O pins are difficult to meet the designer's requirements. Require

For larger application systems, a dedicated main processor can be added to the system for data collection and control, but in small applications, adding one more main processor will increase hardware costs and complicate the problem

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