AppNote_USBtoRS232 软核USB的说明

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

USB的 这次 我这只有两个可以上载 谁能告诉我怎么办-USB of the only two I can upload Can anyone tell me how to do

CH375 USB接口协议芯片MC51平台下的实例程序-CH375 USB interface protocol chip platform MC51 examples of procedures under

usb温度控制器DRIVER-usb temperature controller DRIVER

usb接口编程c++源代码。不是很大，但用处很多，可移植。-usb interface programming c source code. Not great, but a lot of useful, portable.

USB 飞力浦固件开发源码:基本业务处理功能，完整开发文档，已编译通过-the USB source of Philips: the base function ,all empolder source code,can compile OK.

USB转SPI的应用程序 FT2232C-USB-SPI applications FT2232C

USBTrace 测试USB必不可少的工具-USBTrace essential tool for testing USB

上传了一个批量传输得IN程序，现在上传的是EZ-USB FX2的批量传输的OUT程序-posted in a batch transmission IN procedures, now upload the EZ-USB FX2 the bulk transmission procedures OUT

usb的接口资料，vhdl -usb interface data, vhdl