摘要
Abstract
For the application of embedded system in data acquisition and processing,a new scheme is studied to perform the software and hardware design,debugging and implementation. A portable data acquisition and processing system integrating multichannel data acquisition and processing,real⁃time display and USB communication was implemented. For the hardware,5 analog input channels,lithium⁃ion battery charging circuit,SDRAM,NAND Flash storage circuit,LCD interface circuit with SPI communication,USB device interface and DBGU interface circuit were designed based on the peripheral unit of microproces⁃sor,microcontroller development board schematic diagram made by Atmel Company and actual customer demand. For the soft⁃ware,the program modules of multichannel analog input timing acquisition,LCD display,key configuration,and driver of NAND FLASH read⁃write and USB mass storage device were designed by means of IAR integrated development environment, and then some simple data acquisition and processing,and FFT spectral analysis function were realized. In order to analyze and process the analog⁃to⁃digital conversion data in NAND FLASH,the data processing programming based on Matlab and mixed programming based Matlab and VC++ were performed respectively.关键词
嵌入式系统/数据采集/USB大容量存储设备/ARMKey words
embedded system/data acquisition/USB mass storage device/ARM分类
信息技术与安全科学
