目前，測控技術廣泛應用于煉油、化工、冶金、電力、輕工和紡織等行業。本文設計
了基于CAN 現場總線的測控網絡中下位機節點的設計，開發了基于DSP 的下位機節點CAN現場硬件智能測控裝置及通訊軟件。通訊軟件主要包括三大模塊：CAN 現場智能測控裝置初始化，報文發送及中斷接收，基于自定義協議Proto-Can 節點的協議實現即D/A，A/D 等子程序。
關鍵字：現場總線；DSP；測控系統
Abstract: Recently, the measurement and control technology is commonly used in many areas. The slave nodes design of the measurement and control network based on CAN field bus technology is introduced in this paper. The communication software and CAN intelligence control device of slave nodes based on DSP (TMS320LF2407) is designed. It mainly includes modules: the initialize of CAN intelligence control device, the transmission and the interrupt reception of the message, the realization of nodes protocol based on user-defined protocol and subprograms of D/A, A/D.
Keywords: Field Bus; DSP; Measuring and Control System