从PC读取数据通过USB端口，USB设备可显示相关信息。

ERP企业资源管理软件开发知识教育文章， 对于欲要了解ERP知识的同人有所帮助。 -ERP enterprise resource management software development knowledge education article, for wishing to understand ERP knowledge help colleagues.

USB的驱动程序源代码,好东西，大家一起来分享,-USB driver source code, good things, everyone will work together to share

tells you how to do the lab

USB开发大全英文原版，包括各种传输模式的描述和otg-Encyclopedia of the English original USB development, including a description of a variety of transmission modes and OTG

USB系统的设计研究文档，适合USB相关开发的人员阅读。-USB System Design document, suitable for the development of USB-related staff to read.

这是philips的usb d12的驱动测试程序，本版本部分资源已汉化，并解决英文版不能编译问题-This is the Philips USB D12 driver testing procedures, this version has some of the resources the Manchus, and the English version can solve the problem compiler

为USB2.0最新的开发标准驱动程序,也是USB2.0芯片厂家重点定义的驱动程序,属于重量级的驱动-The latest development for the USB2.0 standard drivers as well as USB2.0 chip manufacturers focus on the definition of drivers, the drivers are heavyweight

CH372 是一个USB 总线的通用设备接口芯片，是CH371的升级产品，是CH375芯片的功能简化版。在本地端，CH372 具有8 位数据总线和读、写、片选控制线以及中断输出，可以方便地挂接到单片机/DSP/MCU/MPU等控制器的系统总线上；在计算机系统中，CH372 的配套软件提供了简洁易用的操作接口，与本地端的单片机通讯就如同读写文件。 　　CH372 内置了USB 通讯中的底层协议，具有省事的内置固件模式和灵活的外置固件模式。在内置固件模式下，CH372自动处理默认端点0 的所有事务，本地端单片机只要负责数据交换，所以单片机程序非常简洁。在外置固件模式下，由外部单片机根据需要自行处理各种USB 请求，从而可以实现符合各种USB 类规范的设备。-err

USB设备端固件程序,枚举部分是全部程序的基础和重心,只有主机对设备枚举成功后,主机才能和设备进行正常的通信 USB的枚举过程分为4个状态. 1.接入态 v主机检测到USB设备插上,击活端口,并发送复位命令(保持10ms) 2.默认态 v主机使用默认地址读取设备描述符 (GET_DESCRIPTOR) v主机分配给设备一个总在线的唯一地址 (SET_ADDRESS) 3.地址态 v主机从新的地址获取设备描述符(GET_DESCRIPTOR) v主机获取所有设备的配置描述符(GET_DESCRIPTOR) 4.配置态 v主机设置描述符(设备,配置) (SET_CONFIGURATION) v主机读取配置状态(可选) (GET_CONFIGURATION) v主机读取接口状态(可选) (GET_INTERFACE) -USB device-side firmware, enumerate all part of the foundation and focus of the procedure, only the host of equipment after the successful enumeration, the host and equipment in order to engage in normal communication USB enumeration process is divided into four status. 1. Access state v host detected USB devices plug in, hit live ports, and send the reset command (to maintain 10ms) 2. default state v Use the default address of the host to read device descriptor (GET_DESCRIPTOR) v host assigned to the equipment of a total online only Address (SET_ADDRESS) 3. A

some examples of LCD dit display via USB