面向可重构系统的eCos拓展

针对可重构系统中任务模型灵活性差、硬件任务重构延时长、FPGA资源利用率低等问题,提出了将应用程序划分为软件任务和混合任务的划分模式,并在eCos的基础上,通过重构控制机制、混合任务管理机制、通信机制三方面的拓展,设计了支持可重构系统的嵌入式操作系统框架eCos4RC。仿真结果表明,eCos4RC实现了对混合任务的有效管理,在兼容eCos多线程机制的同时提高了应用程序执行速度和可重构资源利用率,为可重构计算平台提供了良好的运行环境支持。

Extension of eCos for supporting reconfigurable system

For solving the traditional deficiencies of reconfigurable system such as the poor flexibility of tasks model, the long time of hardware tasks configuration, the low resource utilization of FPGA, this paper proposed to partition a software application into software tasks and hybrid tasks. Secondly through extension of eCos in three aspects including reconfigurable control mechanisms, hybrid tasks management and inter-task communication mechanisms, this paper presented an embedded operating system prototype called eCos4RC which was compatible with the multi-thread mechanism of eCos. The experiments results indicate eCos4RC could manage the hybrid tasks and reconfigurable computing resources effectively, and provide a runtime support for reconfigurable computing platforms while reducing the execution time of application.