一种基于PIC18单片机的数字存储示波器设计.doc

一种基于单片机的数字存储示波器Spartan3A作为FIFO相对于速度比较快，体积也小，功耗低，有利于降低功耗[1]。主控制芯片为PIC18F系列的单片机，这个芯片的优势在于高达40M的输入时钟，和有较多的管脚，这样会有较快的速度，以及低功耗，有利于示波器的设计[2]。 关键词：示波器，PIC，FPGA，存储 PIC18 Microcontroller Based Digital Storage Oscilloscope Design Abstract This design aims to make a simple Digital Storage oscillograph which takes PIC18F8720 as its core and PIC as well as FPGA as its structure. It aims to measure one channel signal. It can also used to measure the frequency, Vpp and the waveform of the signal. The measuring frequency range is from 1HZ to 10KHZ; it adopts the 320*240 liquid-crystal display; it can store a certain quantity of the signals parameters, thus , it can realize the basic function of the DSO. Since the date can be showed straightly on the screen after it was read directly from FIFO, its quality of real-timing can be greatly improved. We choose Spartan3A as FIFO because it can result in reducing power dissipation with its faster speed, smaller volume and lower power consumption. The major controller chip is the single chip microcomputer of PIC18F series, of which the advantage is that it has a input clock of 40MHZ and it has a lot of base pins. Thus, it can has faster speed and lower power consumption, which is good for the designing of the DSO. KEY WORDS: oscilloscope，digital，PIC，FPGA 目 录 摘要·····························································································································Ⅰ ABSTRACT·····················································································································Ⅱ 目录·····························································································································Ⅲ 1 绪论·························································································································1 1.1数字存储示波器概述······················································································1 1.2本论文的研究内容及要求····································································