排序方式: 共有35条查询结果,搜索用时 265 毫秒
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基于PCI-Express的高速数据交换设计及应用 总被引:1,自引:0,他引:1
提出了利用PCIE总线技术实现教据高速传输的方案,结合共享内存、DMA等技术设计了基于PCI-Express总线的高速数据传输卡,实现了将采集的数据实时传送到PC的共享内存缓冲区,数据传输采用DMA方式.采用接口器件PEX8111实现PCI-Express总线到PCI总线的桥接.使用FPGA编写PCI总线的接口逻辑,最后进行测试. 相似文献
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Comparison between photoluminescence spectroscopy and photoreflectance spectroscopy in CuGaSe2 epilayer
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Photoluminescence (PL) spectroscopy and photoreflectance (PR) spectroscopy are very useful techniques for studying the properties of materials. In this paper, the same material of Cu-rich metal-organic vapour phase epitaxy (MOVPE) grown CuGaSe2 layer is investigated in a temperature range from 20 to 300 K to compare these two techniques. Both PL and PR spectra appear red shifted, less intense and broadened. The temperature dependence of interband transitions is studied by using the Manoogian Leclerc equation. The values of the band gap energy at T=0K and the effective phonon temperature are estimated. The temperature dependences of intensities and broadenings of PL and PR spectral lines are also analysed. Based on the results of the comparison, the features and applications of the PL and PR can be shown in detail. 相似文献
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基于C8051F040的高性能CAN总线节点模块设计 总被引:2,自引:0,他引:2
经过分析CAN总线节点的功能,提出了CAN总线节点模块设计方案,介绍了典型C8051F040的CAN总线网络结构和CAN控制器结构,在硬件电路设计部分中,对模块实现原理及设计要点进行了详细的介绍,软件部分阐述了CAN总线节点模块的固件程序。给出了以此芯片为核心的CAN总线节点模块的应用层软件。设计的CAN总线节点模块功能强、性能高效,目前已经运用于工业现场使用的测量系统中。 相似文献
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: Onboard recorder is playing on a critical equipment, with large storage capacity, small size, high reliability, and its storage module compared to other storage modules have higher reliability. This paper briefly introduces the methods of work about onboard recorder and memory module.In terms of memory module exists problems on reliability, optimized design from software include the transfer of work state and recognition of instruction of memory module, and the asynchronous serial communication application in memory module, monitoring the working state of memory module. Compared with before, the memory module work more flexible and reliable.#$NLKeywords: reliability; Alternate page programming; Serial communication; Condition monitoring 相似文献
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