基于并口的驱动程序开发

针对地震信号处理的要求，采用具有高动态范围的24位∑-△A／D芯片，设计了以DSP为核心的高精度数据采集系统，并且对可能影响系统动态范围的部件严格控制，充分发挥A／D的潜力，使系统达到最优性能。采用并行接口完成采集系统向上层计算机实时传输数据的功能。为此，首先介绍了基于微软操作系统的WDM驱动程序结构和开发工具，对并行接口EPP模式简略说明。重点对如何使用Driver Studio软件进行驱动程序开发作了叙述，从端口读写到上层应用程序调用，都用最核心的程序代码解释。最后，根据实际开发中遇到的问题，给出解决方法。实践证明，系统硬件完全达到地震信号处理的高精度和实时性要求。

The Bottom Driver Program Development of Hardware Board

According to the requirement o f earthquake sig nal processing, this sy stem described how to usethe 24 bits 2 - $A/ D chipset w hich has the high dy namic rang e and DSP as pro cessor. T he author cont rolsst rict ly the chipsets w hich may inf luence the system dynamic range so that the sy stem can achieve the opt-imal performance. T he data ex changing betw een this sy stem and computer are completed by par allel interface.The WDM driver pro gram st ructure and pr ogram too ls based on the micro sof t operat io n system areex plained and the EPP mode of parallel interface is brief ly int roduced. T he main focus is put on the pro cessof using Dr iv er Studio sof tw are prog ram driver code. T he co re code is inter preted f rom port s read andw rite to computer t ransfer ring . T he author puts on the quest ion to meet in the pract ically design and g iv esthe solve metho d. It is pr oved by ex periment that this sy stem meet s requirement of high precision and realtime performance o f earthquake signal processing system.