基于CAN总线的微型数据采集系统设计

摘要

车载系统对数据采集模块的微型化和实时性要求越来越高.为此,采用SoC型单片机和实时性较强的CAN总线,设计了数据采集系统.通过控制单片机内部的CAN核,使系统的数据采集与数据传输过程能够同时进行,成功解决了内部消息冲突的问题.CAN总线超强的检错纠错能力使系统的可靠性得到保证,实时性和灵活性也得到很大的提高,系统具有广泛的应用价值.%For vehicle-mounted system, the demands on miniaturization and real time performance of data acquisition module are getting increasingly high. To solve this problem, the data acquisition system is designed by adopting the SoC type single chip computer and CAN bus that is with good real time performance. Through controlling the CAN core inside the single chip computer, the processes of data acquisition and data transmission can be synchronously conducted, thus- the collision of internal messages can be eliminated successfully. The reliability of the system is guaranteed by the super high capability of error detection and correction provided by CAN bus, in addition, the real time performance and flexibility of the system are also enhanced, the system possesses extensive applicable values.