基于队列结构的嵌入式系统多进程应用

在基于uClinux的嵌入式图像采集与传输系统中,为解决嵌入式中多进程对文件资源的竞争,加快嵌入式系统的工作速度,可采用循环队列数据结构描述图像资源。文中描述了嵌入式中文件队列资源的数据结构以及嵌入式中文件节点的数据结构。实现了图像采集进程和文件传输进程的核心算法,建立了多进程。使用访问状态标志控制进程同步,解决了资源的竞争和共享。采用基于队列结构的多进程在MCF5272处理器平台上获得了成功。应用实验结果表明,基于队列结构的多进程并行算法,缩短了图像信息的获取时间,提高了嵌入式系统信息采集速度。

Queue Data Structure and Multi-process Application in Embedded System

In order to resolve file resource competition and accelerate rate in multiprocess applications of image collection and transmitting embedded system based on uClinux operating system, the image resource was described through loop queue in embedded uClinux application. The data structures of embedded file queue resource and embedded file node were described in the paper. The key arithmetics of collection and transmitting process were completed and the multi-process was set up. Access signs were used to solve competition and share of resource. The application based on the experimental platform of MCF527 processor is successful by using queue data structures and multi-process. The results indicates that the multiprocess parallel arithmetic of using queue data structures in embedded system can save image capture time and improve rate of information collection.