QL5064桥片DMA传输的VxWorks驱动实现

VxWorks’s Drivers Realization of the QL5064's DMA Transfer

海上高精度三维地震数据采集对室内系统数据处理的高实时性、高可靠性及高效传输性都提出了更严格的要求,海上高精度地震采集设备的室内系统数据传输部分采用基于CPCI(Compact PCI)总线架构的DMA(Direct Memory Access)传输方案。在CPCI总线上进行数据的DMA传输具有高效的性能,DMA传输速度实测达到400M byte/s,能够满足海上高精度地震采集设备数据处理模块的处理需求,文章介绍电缆接口板的工作流程和QL5064桥片的基本特性,阐述了基于QL5064桥片DMA传输的配置原理、配置流程及在VxWorks中驱动的具体实现。

High-precision three-dimensional marine seismic data acquisition proposes more stringent requirements to indoor system data processing in high real-time, high reliability and efficient transmission. High-precision marine seismic acquisition equipment is the indoor system whose data transmission module is based on CPCI （Compact PCI） bus architecture, DMA （Direct Memory Access） transfer program. The DMA data transport speed reaches 400M byte/s, which can meet the needs of marine seismic acquisition. The paper describes the process of the cable interface board work and QL5064 basic characteristics of the bridge piece, elaborates bridge chip based on QL5064 DMA transfer configuration principle and configuration process, and gives an account of the driver specific realization in the VxWorks.