根據工業應用的實際需要以及網絡通信發展的功能要求，提出了基于FPGA智能變送器控制系統的總體方案， 設計了以XILINX公司的Spartan3系列XC3S4005PQ208C可編程邏輯器件為主控制器、DM9000A為以太網通信接口、SJA1000為CAN控制器的硬件系統，并給出了系統軟件流程圖，重點論述了數據采集和數據模擬輸出控制電路的FPGA實現，結合ISE10.1設計軟件給出了A/D、D/A的仿真結果。

　　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.

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