基于低功耗单片机的智能综合仪表设计

本文阐述了基于低功耗单片机的智能综合仪表的研究和开发。从硬件方面的通用信号调理、基于PWM 的DAC 的实现、点阵液晶显示、按键处理、串行FLASH 存储、实
时时钟、RS485 通讯以及软件方面的数字滤波、数据处理、数字PID 控制、系统运行显示、系统组态、数据存储追忆、实时时钟等等方面的技术要点进行了介绍。最后简单介绍了系统软件总体结构设计。
关键字: 仪表；低功耗；RS485；输入电路
Abstract: The thesis presents the research and analysis of the intelligent multi-function instrument based on low cost MCU. The technology point of the all-purpose signal measure, DAC based on PWM, lattice LCD display, key disposal, storage on serial FLASH, real time clock, communication on RS485 of hardware and digital filter, data disposal, digital PID control, system circulating display, system configuration, data storage and remembrance, real time clock of software are took apart and dissertated concretely. At last, the main structure design of the system software is introduced in general.
Keywords: Instruments; Low Cost; RS485; Input Circuit