汽车行驶记录仪主USB接口的设计

Host USB Interface Design for Vehicle Travelling Data Recorder

针对汽车行驶记录仪从式USB接口的不足,讨论了符合汽车行驶记录仪规范(GB/T19056-2003)的主式USB接口的设计方法。着重介绍了SL811的主USB接口功能以及基于该芯片实现U盘FAT文件系统的硬件和软件设计,最终实现的汽车记录仪主式USB接口可通过U盘在行驶记录仪和桌面电脑之间实现数据交换。

The slave USB interface in vehicle travelling data recorder is a deficient way to exchange data between recorder and PC. A host USB design compatible to the vehicle travelling data recorder（ GB/T19056 - 2003） is demonstrated, and how to configured the SLS11 as a host USB controller and the realization of accessing the USB disk through FAT file system are introduced. A good means for exchanging data between PC and the vehicle travelling data recorder is given.