基于ARM微处理器的智能化PXI总线扩展卡的设计

在测控系统的研制中，为适应复杂的测控场合，满足较高的系统实时性，通常需要采用智能化总线扩展卡，该类板卡具有板载微处理器，可作复杂的计算处理，减少主板CPU的工作量。结合嵌入式计算技术和目前测控领域十分流行的PXI计算机总线技术的研究，阐述了基于ARM微处理器的智能化PXI总线扩展卡的设计思路和开发方案。详细介绍了PXI总线接口的设计，板载ARM微控制器的电路连接方法，以及微控制器通过双口RAM和主板CPU之间的数据交换技术。并通过具体的智能化板卡设计实例，阐明了设计方案的实际应用。

Intellective PXI bus extended card design based on ARM microcontroller

In the development of measure & control system, the usage of intellective bus extended card is always necessary to satisfy the real-time requirement of sophisticated applications. The designing idea and development plan of bus extended card based on ARM microcontroller were introduced, with reference to the research of bus extending technology and embedded computing technology. The periphery circuit connecting method of on board microcontroller and data access technology through DPRAM between microcontroller and mother board CPU were put forward.