基于NIOS Ⅱ的数字示波器设计  

A digital oscilloscope based on NIOS Ⅱ soft-core

作　　者：杨岚岚[1] 

机构地区：[1]南通大学

出　　处：《信息技术》2009年第12期83-87,共5页Information Technology

摘　　要：数字示波器是一种直观、通用、精密的测量工具,广泛应用到物理学、化学、生物学、数学、医学等各种学科领域之中,对电量和许多非电量进行测试、分析、监视。本项目设计了一种基于NIOS Ⅱ软核的数字示波器,示波器基于采样原理,利用高精度A/D转换芯片ADS1211,对模拟信号进行采集,并转换为相应的并行数字信号传给CPU,CPU根据UART控制单元的命令对数据进行相应处理,并写入显存(SRAM),VGA控制器再将显存里的内容显示在显示器上。示波器可以调幅调周期,可以双通道显示波形,可以实现波形的叠加。Digital Oscillograph is a sort of intuitional, universal and precise instrument. It is used in the all kinds of study field such as physics, chemistry, biology, mathematics, and signal. It is used to test, analyze, and survey the electrical signal and non-electric. The article designs a digital oscilloscope based on NIOS II soft-core, this oscilloscope is based on sampling, uses high-precision A/D converter chip ADS1211, collects the analog signal, and convertes it to the corresponding parallel digital signal transmission CPU. CPU processes the data under the command of UART, the data are written in SRAM, then are displayed by the VGA memory controller. The oscilloscope works AM-cycle, dual-channel display waveform, the waveform can be superimposed.

关 键 词：数字示波器 NIOS Ⅱ软核 高精度AD 

分 类 号：TP311.1[自动化与计算机技术—计算机软件与理论]