基于USB总线的嵌入式虚拟仪器的设计

Design of Embedded Virtual Instrument Based on Universal Serial Bus

针对传统虚拟仪器不具有即插即用、热插拔等功能,提出了基于系统和USB总线技术构建嵌入式虚拟仪器的设计方案和具体实现。同时在分析传统虚拟仪器不足的基础上,构建了基于USB总线的虚拟仪器体系。该嵌入式技术可以把虚拟仪器的硬件集成在嵌入式电路板上,软件固化在Flash存储器上,完成A/D转换、D/A转换以及数字滤波和数字信号处理等功能,并给出了软、硬件设计方案。设计的虚拟仪器具有智能化和良好的系统扩展性,是未来虚拟仪器发展的方向。

In the light of traditional virtual instruments no possessing the functions of plug-and-play and plug-and-pull-out, the design strategy and practical implementation of establishing an embedded virtual instrument based on embedded system and USB technologies are proposed. On the basis of analyzing the defects of traditional virtual instruments, the architecture of virtual instrument based on USB was created. Using this embedded technology , the hardware of the virtual instruments can be integrated into the embedded circuit panel, the software can he solidified into the Flash memory, some functions such as A/D conversion, D/A conversion, digital filter and digital signal processing can also be fulfilled. Meanwhile, the design strategies of hardware and software are given. This embedded virtual instrument features intelligence and excellent expanded ability. It is the developing orientation of virtual instruments in future .