Design Of Serial Power Communication Protocol Detecting Device Based On AVR MCU

With the development of automation technology, substation automation system is a set of measurement, control, communication, integration of information technology, communications and information systems constitute the bridge between control and information of substation, substation of safety monitoring and daily operation of great significance, for the automation system based on serial port communication, because of the special nature the data frame format, communication network no self diagnostic ability, can not meet the requirements of fast fault location, recovery. In this paper, combined with the communication of substation integrated automation system based on CDT communication protocol based, propose and design serial power statute detection device based on AVR single chip microcomputer. Detecting device with a ATmega32microcontroller as the core, integrated and general RS232interface and RS485interface circuit, each node collects data access automation communication equipment link, and the data is displayed in the LCD display, the keyboard selection system, main functions include serial communication baud rate selection, display and processing CDT message. In order to meet the practical needs, low power design of the device, the battery as the main power supply, friendly man-machine interface, display, control and communication processing visual information. Statute of the power conversion device will play an important role in the safe operation and test automation.The main contents of this paperdescribe the topic background and significance and the domestic and foreign research and development situation, introduces the role of micro-electronics technology, computer technology to the intelligent instrument.From the aspects of hardware structure of the system, select of the components. Discusses the analysis of the communication test device function, starting from the function, the hardware design scheme, design ATmega32microcontroller as the core, using a variety of new integrated circuit chip (liquid crystal display chipT6963C, serial communication chip MAX233), interface design, simplify the circuit, improve the anti-interference level.According to the internal function, hardware structure and the system, the core, man-machine interface and protocol processing program. Introduces microcontroller instruction, the relevant register function, the display module function control chip T6963C and related instructions, keyboard and display interface control on the page, convenient staff on message view and analysis.