关于NI公司PCT6025E板卡运用问题
<P> 我现在正在用NI公司的PCI6025E这块板卡做一个信号发生器，要求达到频率1.5K以上，但是我在用输出模块时运行会出现10843的错误信息。我去NI网站他说是：PCI6025E这块卡doesn't have a FIFO buffer for AO operations。并且解决的方法是：Another solution would be to force the device to use Direct Memory Access (DMA) for analog output operations. This can be done by using Set DAQ Device Information.vi, which can be found in the Functions Pallette under the Data Acquisition » Calibration and Configuration sub-pallette. DMA's allow data to be moved from one location to another in a computer without intervention from the CPU. Before using this option, make sure that the device can support DMA operations and has DMA's available for use. This information should be listed under Appendix A of the User Manual of the device.</P><P>我想请大家帮忙，我该怎么运用DMA来解决这块难题。CPUBBS你帮忙说我该怎么解决这个问题啊？</P> “This can be done by using Set DAQ Device Information.vi, which can be found in the Functions Pallette under the Data Acquisition » Calibration and Configuration sub-pallette.”它说在这个地方能找到，我没有用过NI的卡，你看看这个地方有没有呢？我帮你找一个朋友问问，他比较熟NI的卡的！好吗？ <P>谢谢cpubbs，我等你的回复，</P> <P>可能是你的程序有问题 这段话说得是PCI6025E没有FIFO缓冲区供AO操作使用，必须事先分配缓冲一边存放要输出的波形。</P><P>另你可以使用DMA方式进行AO输出，可以通过设置AO设备的属性（Information.vi）来实现，</P><P>至于PCI6025E是否支持DMA输出，应参考用户手册的附录A</P><P>建议仔细研究PCI6025E的用户手册和NI－DAQ用户手册</P> 该函数在NI MEASUREMENTS->DATA ACQUISITION->CALIBRATION AND CONFIGRATION下
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