摘 要
本設計運用VHDL語言,采用Top To Down的方法,設計了一種8位簡易的數字頻率計,并利用Isp Expert集成開發環境進行編輯、綜合、波形仿真,并下載到CPLD器件中,經實際電路測試,該系統系統性能可靠。主要功能有:頻率測量、周期測量和脈沖寬度測量。整個設計可以分為三個部分:方案設計、軟件設計、硬件設計。本文詳細介紹了簡易數字頻率計的軟件設計和硬件設計。
關鍵詞:EDA;VHDL;數字頻率計;波形仿真;CPLD
Abstract
The use of VHDL design language, the use of Top To Down approach, designed a simple 8-bit digital frequency meter, and the use of Isp Expert integrated development environment for editing, synthesis, simulation waveforms, and downloaded to the CPLD devices, the actual circuit test, the system reliable system performance. The main features are: the frequency of measurements, the cycle measurement and pulse width measurement. The whole design can be divided into three parts: program design, software design, hardware design. This paper describes a simple digital frequency of software design and hardware design.
Key word: EDA;VHDL;digital frequency meter;Waveform Simulation;CPLD