基于DMX512的LED智能舞台灯具的设计

Design of Intelligent Stage LED Light Based on DMX512

本文以DMX512为基本的数据传输协议,采用双向隔离放大器,具有大电流、低功耗的LM3404HV为LED驱动器,以C8051F410为核心控制器,以SN75176为总线收发器,介绍了现代智能LED灯具的相关硬件和软件设计技术。基于双向隔离放大器,本文将普通的单工DMX512网络扩展为半双工的双向通信网络,使灯具的使用更加方便和智能。同时通过定时中断完成键盘扫描,达到了快速灵敏的反应效果,使人机接口更加人性化。

This paper describes the hardware and software design of the intelligent LED light.Its data transfer protocol is based on the DMX512,and it is designed with double-sided isolation amplifiers whose baud rate is adaptive,and the core CPU is C8051F410.The LED driver is LM3404HV that owns high current and low power consumption features,SN75176 is the DMX bus transceiver.And with the scanning of keyboard which is drived by timed-interrupt,the light is very sensitive,its reaction is rapid and its operation is more human.