一种分散聚集DMA实现高速数采的WDM驱动实现方法

Implementation of scatter-gather DMA program with WDM on high-speed data acquisition

针对雷达高速数据采集的需要,基于研华PCI-1712高速数据采集板卡,在Windows2000平台上利用DDK开发了PCI总线下主控DMA的WDM驱动程序,允许设备使用分散的遍及整个DMA地址空间的缓冲区执行数据输入操作.文中给出了这一具有分散聚集能力、基于包传输的DMA设备的驱动开发思路.

For the need of radar signal high-speed acquisition,based on the high-speed data acquisition card PCI-1712 of Advantech,the WDM driver is programmed by DDK for PCI Card supporting the bus master DMA in Windows 2000.The WDM driver supports the scattered buffer existing everywhere in the whole DMA address space to operate analog input.The paper discusses development method for this kind of driver which supports packet-based DMA transfer and scatter-gather ability.