【摘要】 本文用VHDL语言对Petri网中的库所和变迁分别进行描述并实现,并在EDA软件平台MAX+plusII中生成其对应的器件符号图,建立Petri网元件库。并以一个实例,像调用电路元件那样,通过调用生成的Petri网元件,绘制出Petri网模型对应的电路图,然后在Max+PlusII中进行编译、模拟、适配,并下载到可编程逻辑器件FPGA中,最后在实验开发系统GW48-CK中进行硬件测试,可直接获得控制器。此方法为并行控制器的设计与实现提供了一种有效的途径,这也是一种图形化的编程方法。仿真波形及硬件测试结果表明了这一方法的正确性。更多还原

【Abstract】 In this paper,place and transition of Petri Net were described and implemented with VHDL.The corresponding symbol diagrams were generated in EDA software MAX+plusII.Thus Petri Net’s component library was established.An example was presented.The circuit diagram of Petri Net was drawn through using Petri Net’s components in component library like calling circuit components.Then the circuit diagram was compiled,simulated,fit design and downloaded to the Programmable Logic Device FPGA in MAX+plusII.Hardware experiment was performed with GW48-CK finally.Thus the controller was achieved directly.The approach will supply an effective way to the design and implementation of parallel controller.It is also a graphic programming approach.Simulation wave and hardware experiment further verify the correctness of the method.更多还原