摘要
U SB设备端开发必须首先完成U SB总线枚举的调试,只有完成了总线枚举,才有可能借助调试软件观察U SB总线数据传输情况。而U SB设备总线枚举过程的调试有着较大的工作量,初次进行U SB调试的调试者一般需要借助于一些U SB分析仪的帮助。但是U SB分析仪普遍价格昂贵,对于普通的调试者来说是很不合适的。本文介绍了一种在没有U SB分析仪的情况下,利用系统已有的RAM存储器,对U SB设备控制器PD IU SBD 12的总线枚举调试过程进行监控的方法。该方法对硬件要求低,不仅节省成本,而且操作简便,有较高的调试效率。
It is very important of USB debugging ,it is possible to watch the data transferring in the Universal Serial Bus with some debug software＇s help only after USB bus enumeration has been finished. So USB bus enumeration must be completed first in the process of USB device debugging. Instrument like USB analyzer is needed for learners. However these machines have high price, The paper introduces a debugging method of USt3 bus enumeration,which uses the system＇s Random Access Memory to watch the process of USt3 bus enumeration of USt3 device controller PDIUSt3D12. The method has low request of hardware, which not only can save the cost, but also can be easily handled. It has relatively high debugging efficiency.
出处
《现代电子技术》
2005年第22期41-42,45,共3页
Modern Electronics Technique
