针对目前市场上ARM+FPGA的LED视频控制系统开发成本高,控制复杂等问题,提出一种基于DMX512-A协议的单芯片LED视频控制系统.系统采用分布式存储技术,使得控制器负载均衡,带载MQX实时操作系统具有高并发性和实时性;采用多链表的内存管理方式,并结合预取和缓存技术大大提高程序执行效率;同时利用以太网实现LED视频的远程更新.本系统将图像处理和信号产生相分离,减少各个控制器的负担,成本低、控制灵活,适用于中小型户外LED视频播放.%Aiming at the issues such as high development cost and complex control of the current ARM+FPGA LED video control system in the market,a single-chip LED video control system based on DMX512-A protocol is proposed. The distributed storage technology is used in the system to achieve load balancing between controllers. With the MQX real-time operating sys-tem,the proposed system has high concurrency and real-time performance. The program execution efficiency was greatly im-proved by means of the memory management mode adopting multi-linked list,and in combination with prefetching and caching technologies. The remote update of the LED video is realized by using the Ethernet. The system separates the image processing from signal generation to reduce the burden for each controller. It has low cost and flexible controllability,and is suitable for small- and medium-sized outdoor LED video play.
展开▼
