摘要
为适应工业应用现场需要将本地远程命令以汉字和ASCII码显示的要求,提出采用基于单片机的液晶显示器(LCD)显示终端。其硬件系统主要由微处理机、译码电路、字库、临时缓冲区、LCD模块接口、通信电路、蜂鸣器发声、复位及看门狗等组成。软件采用RTX51实时操作系统,可实现按时间片轮转和抢先的任务调度,并支持事件和信号驱动。叙述了软件的任务分解、任务工作流程。所设计的LCD显示终端成本低、可靠,符合设计要求。
In industrial application site ,the remote control commands need to be displayed in Chinese and ASCII codes locally. An LCD（Liquid Crystal Display） terminal based on singlechip is designed for it. Its hardware is mainly composed of microprocessor,encoding circuit,word warehouse, buffers,LCD interface,communication circuit,buzzer,reset circuit and watchdog. Its software adopts RTX51 real- time operating system,realizing task dispatch by time slice rotation and competition mechanism,and supporting event and signal driving. The task decomposition and working flow are described. The designed LCD terminal is cheap,reliable and meets design requirements.
出处
《电力自动化设备》
EI
CSCD
北大核心
2007年第9期110-112,共3页
Electric Power Automation Equipment
