One-line bus monitoring device and implementation method for realizing local search and address setting

Abstract

The invention relates to a one-line bus monitoring device and a realization method for realizing local search and address setting. The one-line bus monitoring device includes a power supply circuit, a minimum system of a single-chip microcomputer, a communication interface circuit, a one-line bus interface circuit, a display module and a keyboard module; the power supply circuit Provide working voltage; the minimum system of the single-chip microcomputer is connected to the monitoring host and the temperature measurement cable through the communication interface circuit and the first-line bus interface circuit, and sends the bus control signal to the first-line device on the temperature measurement cable and receives the feedback signal from the first-line device. The system processes the received signal and transmits it to the display module for display; four function keys ESC, UP, DOWN and ENTER are set in the keyboard module, and the three combination keys ESC+UP, ESC+DOWN and ESC+ENTER are used to expand the The function of the keyboard module, the corresponding function selection and the switching of the temperature information display of the measuring point are performed through the keyboard module.

Description

technical field [0001] The invention relates to a monitoring device and an implementation method, in particular to a one-line bus monitoring device and an implementation method capable of realizing local search and address setting. Background technique [0002] A one-line bus refers to a bus that uses only one signal line and one return line as a reference ground to realize digital communication. Using one-line bus technology can realize the access and control of several one-line devices lapped on this bus. The first-line device is a device that complies with the first-line bus protocol and realizes a certain detection function. Each first-line device is etched with a unique ID code when it is manufactured. The most typical one-line device is the one-line digital temperature sensor DS18B20. Several one-line digital temperature sensors are connected to a twisted-pair cable according to the requirements of the monitoring position to form a temperature measurement cable. In t...

AI Technical Summary

Problems solved by technology

When building a first-line bus monitoring system in the prior art, it is necessary to set the addresses of the one-line bus monitoring devices one by one through the monitoring host operating configuration software. The first-line bus monitoring device can only be connected to the first-line bus monitoring system after the address setting is completed. The way the host sets the address of the first-line bus monitoring device brings inconvenience to practical applications

Images