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题名	基于DSP的新型SPM系统硬件方案研究; 基于DSP的新型SPM系统硬件方案研究
作者	1王春雨,电工研究所
学位类别	硕士
答辩日期	2005
授予单位	中国科学院电工研究所
导师	1方光荣,电工研究所
关键词	扫描探针显微镜 数字信号处理器 usB2.0接口 高精度A／D和D／A SPM(Scanning Probe Microscope) DSP USB2.0 interface High-precision A/D and D/A
其他题名	基于DSP的新型SPM系统硬件方案研究
学位专业	电力电子与电力传动
中文摘要	本文通过对实验室已有的扫描探针显微镜（SPM）仪器系统一些缺点的分析，提出了基于德州仪器公司的TMS320C6713DSP的新型SPM系统硬件设计方案，并且．己经实现该硬件系统，也通过该系统初步完成了接触式AFM模式的闭环扫描。整个系统由DSP主控板、A／D板、D／A板、高压放大板、多功能信号处理板和电源系统组成，采用总线式结构，并且每块功能板上面的工／0控制逻辑都采用CPLD芯片实现。每个部分在设计时都充分考虑到将来升级和增加功能的需要，在保证系统可靠性的同时，尽量采用高性能高精度的芯片。系统主控板以DSP为基础，外部扩展了一片RAM和一片FLASH，并通过USBZ．O接口与．卜位机通信，USB接口芯片采用CYPRESS公司的CY7C6SO13。RAM、凡ASH、USB接口以及其他各个功能板的地址分别都映射到DSP的CEO一CE3空间。为提高仪器精度，A／D板和D／A板分别采用16位高性能A／D以及叮A芯片重新设计。电源的低压供电部分也采用新方案重新设计，大大降低了系统电源噪声。同时，高压放大板和多功能信号处理板也分别根据需要作了不同的改进。文章最后讨论了与软件设计相关的一些问题，并给出了针对不同硬件功能的一些测试程序框图以及接触式AFM模式下对空白光盘样品进行扫描的扫描波形和图像。 By analyzing the limitations of the previous SPM system in our lab, a new type SPMhardware system was developed, which was based on the TMS320C6713 DSP of TL With it, close-loop scan of contact mode AFM had been completed.A bus-architecture was used in the system, and the system was made up of the DSP main control board, the A/D board, the D/A board, the high voltage amplifier board, the multi-function board and the power supply module. The I/O control logic of each function board was realized by CPLD. Considering the convenience of the system's upgrade and increasing function, most high perfermannce chips were used in the system.EMIF (External Memory Interface) , the giueless interface to a 16M-bit, 2-bank and a 64M-bit, 4-bank SDRAM in DSP, offers an interface for high-speed and high-density memory to system designers. The main control board used EMIF to extend an external RAM and a FLASH, and communicated with PC by USB2.0 interface. CY7C68013 was used as USB interface chip. The address of RAM> FLASHY USB and all the function boards were mapped to the DSP's CE0~CE3 space.In order to improve the precision of the system, the 16-bit A/D chip and D/A chip were used in the A/D board and D/A borad. Furthermore, a new power supply module were designed to reduce the system noise, and the high voltage amplifier board and the multifunction board were updated at the same time.At the end of this article, some prblems about the software design of the system were discussed, some flow charts of the test program were listed, and the scanning waveform and images of contact mode AFM were discussed.
语种	中文
公开日期	2010-10-18
页码	85
内容类型	学位论文
源URL	[http://ir.iee.ac.cn/handle/311042/7397]
专题	电工研究所_其他部门_其他部门_硕士学位论文
推荐引用方式 GB/T 7714	1王春雨,电工研究所. 基于DSP的新型SPM系统硬件方案研究, 基于DSP的新型SPM系统硬件方案研究[D]. 中国科学院电工研究所. 2005.

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