基于FPGA的智能变送器的设计

　　根据工业应用的实际需要以及网络通信发展的功能要求，提出了基于FPGA智能变送器控制系统的总体方案， 设计了以XILINX公司的Spartan3系列XC3S4005PQ208C可编程逻辑器件为主控制器、DM9000A为以太网通信接口、SJA1000为CAN控制器的硬件系统，并给出了系统软件流程图，重点论述了数据采集和数据模拟输出控制电路的FPGA实现，结合ISE10.1设计软件给出了A/D、D/A的仿真结果。

　　Abstract:

　　According to industrial application’s actual need as well as the network service development’s function request， this article proposed the overall program of the intelligent transmitter control system based on FPGA，designed the hardware circuit of the system，which， XILINX’s Spartan3 programmable logic device-XC3S4005PQ208C for the base-controller、DM9000A for the ethernet communication interface、SJA1000 for the CAN controller，and gave the software flow chart of the system，focused on implementation of data acquisition and analog output based on FPGA. And the simulation result of the A/D、D/A is given by combing ISE10.1.