基于CPCI的伺服卡的DMA和中断研究

Implementation of DMA and interrupt of Servo control card based on CPCI bus

为简化当前光电设备电子学系统的结构,本文提出了基于CPCI总线,以DSP和FPGA为控制核心的伺服控制卡结构,来取代原来的控制子系统;在Windows 2000下,利用Driver Studio为其开发的WDM驱动程序,采用DMA结合中断的数据传输方式,使其与上位机的通信速率在突发模式下能达到26.3Mbytes/s,满足了系统对伺服控制器的实时性要求。

To simplify the structure of the current optic-electronic system, this paper proposed a Servo control card structure, which is based on CPCI bus amt use the DSP and FPGA as the control core,to replace the former control subsystem. WDM driver for the card was developed with Driver Studio as the developing tool in Windows 2000. By using DMA and interrupt with the burst model, the data speed can reach 26.3Mbytes/s, which can satisfy the real time requirement of the servo control card.