基于ARM的便携式数据采集与处理系统设计

摘要

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.%针对嵌入式系统在数据采集与处理中的应用，研究了一种新的方案进行系统的软硬件设计、调试和实现，完成了一个集多路数据采集与处理、实时显示和USB通信于一体的便携式数据采集系统。在硬件方面，利用微处理器的外围设备，结合Atmel公司提供的微控制器开发板原理图和客户实际需求，设计了5路模拟量输入通道，锂离子电池充电电路， SDRAM，NAND FLASH存储器电路，SPI通信方式的LCD接口电路，USB设备接口和DBGU接口电路。在软件方面，利用IAR集成开发环境设计了多路模拟量输入定时采集，LCD显示，按键设置，NAND Flash读写和USB大容量存储设备驱动等程序模块，并实现了一些简单的数据采集处理和FFT频谱分析功能。最后，为分析、处理NAND FLASH中模/数转换的数据，分别进行了基于Matlab的数据处理编程和Matlab与VC++的混合编程。