Floating-point DSP with rich peripherals and higher frequency is widely used in the field of industrial control. The field bus constituted by CAN bus and high-speed communication network composed of Ethernet have become the develop-ment hot points in the field of industrial control. A design method of the interconnected system for Ethernet and CAN bus based on TMS320F28335 is proposed in this paper. The design and implementation methods of the hardwares and softwares in each as-sembly of the system are presented. The TMS320F28335 of TI Company is adopted in the control section. SN65HVD230 of TI Company is adopted as CAN bus interface module. RTL8019AS of Realtek Company is taken as the control chip of Ethernet in-terface module. The design has the advantages of good scalability and high cost performance.%浮点型DSP以丰富的外设，较高的主频在工业控制领域得到广泛的应用，CAN总线设备构成的现场总线与以太网构成的高速通信网络已成为工业控制领域的发展趋势。介绍了一种基于TMS320F28335的CAN总线与以太网互联系统的设计方法，给出了系统各组成部分的硬件及软件的设计与实现。控制部分采用TI公司的TMS320F28335，CAN总线接口模块采用TI公司的SN65HVD230，以太网接口模块控制芯片采用Realtek公司的RTL8019AS。该设计具有可扩展性好和性价比高的优点。
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