讨论了基于层次消息总线模式的智能控件化虚拟仪器开发系统的软件体系结构，分析了该模式所存在的问题。
The software architecture of the developing platform of Virtual Instruments based on Hierarchical Message Bus was discussed, and the problem of this mode was analyzed.
针对存在的不足之处，提出了基于软件总线控制的体系结构，并设计了相应的接口协议标准。
Regarding to this, an architecture based on the software bus-mastering is presented and a relevant interface protocol standard is designed.
研究了三层抽象软件体系结构的特点，并详细论述了该结构在电机控制以及CAN总线通信程序设计中的具体应用。
The characteristics of the architecture are studied. Its application in the motor control and CAN bus communication program is discussed in detail.
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