现代仪器用多微处理器系统仲裁机制的研究

在分析现代仪器系统特点的基础上,研究了多微处理器系统的总线仲裁机制,选择了基于分布式仲裁方式和动态优先权策略作为系统的总线仲裁机制．由于采用了“优先权分段”的原则和“自选择优先权网络”电路,保证了总线使用权的公平性、合理性、灵活性和系统的可伸缩性,为系统容错和带故障降级运行提供了硬件基础,提高了系统的可靠性和实时性,满足了现代仪器的特殊要求．

Study on arbitration mechanism of the modern instrument-oriented multiprocessor system

Modeling process is the core of modern instrument system. Multi-function, multi-parameter, high-performance and high-reliability are directions of it. And the architecture of multiprocessors based on shared bus is an advisable architecture. The article has studied the bus arbitration mechanism of multiprocessor system architecture based on the characteristics of modern instrument. We selected the distributed arbiter and dynamic priority scheme to implement the target bus arbiter. For "adoption subsection- priority" policy and "n-bit self-selection network" circuit, the bus arbiter not only has the characteristic of fairness, rationality, flexibility and extension, but also improves the reliability and real time ability. It will satisfy the degraded operation request of modern medical instrument. The bus arbiter hardware and discusses the implementation of a prototype were studied in detail, and the results are fit for modern medical instrument especially.