基于Delphi具有频域输入法的任意波发生器

Delphi-based arbitrary waveform generator with frequency spectrum method

Delphi7.0实现上位机操作菜单,USB1.1实现仪器通信接口,FPGA为数字平台,LCD实现智能图形与菜单界面,在CPU控制下以智能与虚拟兼容的方式,实现时域、频域定义的各种波形产生,波形参数步进在线可调。研制结果表明该设计思想与方法是有效的,文中讲述了系统设计思想,信号输入设计法、软件流程及FPGA设计过程。

An arbitrary waveform generator was developed by CPU control to generate waves in time or frequency domain input method, which could compatibly work in intelligent and virtual mode, in which Delphi 7.0 was used for upper computer work＇ s menu, USB1.1 tor instrument communication interface, FPGA for digital platform, LCD for figures and menu interface when intelligent mode, waves parameters can be adjusted online step-by-step, the development result showed the idea and method were effective, specific FPGA design methods, software flow, signal input method were introduced in the paper. How to design a new-style software by which arbitrary waveform could be produced and controlled based on Delphi 7.0 in the Windows was introduced in this article. Beside shapes of general waves, a method for collecting data from arbitrary waveform, superposition of frequency domain producer, correspondence connects, and the realizing principle ＆ design method of the transition from frequency domain to lime-domain were especially discussed. Experimental results show that this software has it＇s facile interface and could be conveniently used, flexibly measured and transplanted, the function of the alternation between user and the DDS arbitrary was well realized. Lastly, the validity of the design method was well proved by experiments.