USB同步传输在实时数据采集中的应用

Multi-channel Real-time Collecting Data Application with the USB Isochronous Transfer

讨论了基于USB接口的同步多路数据采集系统的设计。采用单片机控制数据实时采样 ,在主机WDM驱动程序设计中利用链表技术增加IRP(I/ORequestPacket)向USB总线驱动程序提交URB (USBRequestBlock)的数量 ,改善了采样数据的完整性 。

This paper discussed how to design a multi-channel data collecting system based on the USB isochronous interface. The Single Chip was used to control the real-time sampling of the data. The WDM driver of the host computer applied the chain list to increase the number of URBs sent to the USB bus driver by IRP at one time. So the integrality of collecting data was improved,and the real-time capability of the whole data collecting system was enhanced.