| 用于虚拟仪器的USB2·0接口高速数据采集卡的设计 |
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| 引用本文： | 程耀林,李享元,何湘竹.用于虚拟仪器的USB2·0接口高速数据采集卡的设计[J].计算机测量与控制,2011,19(5). |
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| 作者姓名： | 程耀林 李享元 何湘竹 |
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| 作者单位： | 中南民族大学,电信学院,湖北,武汉,430074 |
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| 基金项目： | 中南民族大学校基金资助项目(YZY07003) |
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| 摘 要： | 提出了一种用于虚拟仪器的USB2.0接口高速数据采集卡的设计。针对USB2.0高速模式实现难的问题,分析了高速数据路径上的所有瓶颈及其解决方法,提出了系统的同步设计方法。选择ADS5232作为高速A/D芯片,CY7C68013作为USB2.0接口芯片,充分利用了该芯片提供的高速模式、自动工作模式和Slave FIFO端口模式,使用FPGA作为所有模块的控制器,CPU不参与数据处理,只用于寄存器初始化,从而实现高速采样和高速传输。软件部份分析了固件程序,驱动程序和主机应用程序的功能特性以及采集卡和Labview开发工具的接口问题。硬件测试的USB2.0接口的净荷平均速率达到149.6 Mbps,表明高速模式的采集卡是可以实现的。
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| 关 键 词： | USB2.0高速模式 自动模式 数据瓶颈 同步设计 |
Design of High-speed Data Acquisition Card with USB2.0 Interface Used in Virtual Instrument |
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| Cheng Yaolin,Li Xiangyuan,He Xiangzhu.Design of High-speed Data Acquisition Card with USB2.0 Interface Used in Virtual Instrument[J].Computer Measurement & Control,2011,19(5). |
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| Authors: | Cheng Yaolin Li Xiangyuan He Xiangzhu |
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| Affiliation: | Cheng Yaolin,Li Xiangyuan,He Xiangzhu(College of Electronic and Information Engineering,South-central University for Nationalities,Wuhan 430074,china) |
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| Abstract: | Design of high-speed data acquisition card with USB2.0 interface used in virtual instrument was put forwarded.The all data bottlenecks on the high-speed data path were analyzed and its solutions were provided for the problem about USB2.0 high-speed mode realization difficulty,and the system synchronization design method was put forwarded too.ADS5232 was selected as high-speed A/D chip,CY7C68013 was selected as USB2.0 interface chip,and its high-speed mode,Auto-in/Auto-out modes and Slave FIFO port mode were... |
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| Keywords: | USB2 0 high-speed mode auto-mode data bottleneck synchronization design |
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