CAN总线技术、系统实现及发展趋势

现场总线是近20年发展起来的新技术，CAN总线是一种应用广泛的现场总线，在工业测控和工业自动化等领域有很大的应用前景。文章在分析和总结相关文献的基础上，讨论了CAN总线的主要特点，基本功能结构，较为详细的介绍了有关CAN协议的器件和芯片，进一步分析了基于CAN总线系统设计中的问题，总结了系统硬件设计的一般步骤和系统软件设计应遵循的一般原则，总结了CAN总线的发展前景和应用领域，最后根据有关文献和目前的应用状况，展望了CAN总线的发展趋势。

CAN fieldbus technology, system realization and its developing direction

Fieldbus is a new technology developed in recent 20 years. The CAN is a kind of fieldbus that is widely used. It has a good application future in the field of industrial controlling and automatization. Based on related materials, the main features and basic functions of CAN fieldbus are discussed and the commonly used apparatuses and chips, which abide by the CAN protocol, are introduced. Problems in the system designing based on CAN are analyzed. The steps of hardware design and the common rules of software design are discussed. The background of CAN and its applications are summed up. In the end, the developing direction of CAN is forecasted according to relative references and its recent conditions of application.