USB应用程序开发

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1、USB应用程序开发 1前言USB开发跟其他文件设备（如串口）开发一样，难点是找到该USB设备的路径，本文以DDK里src/usb/bulkusb例子为参考，阐述一个非HID的USB调试器软件的开发过程。2设备GUID一般设备会有两个GUID,一个为ClassGUID,在INF文件中，另一个为DeviceGUID,在SYS文件中。CreateFile使用的是SYS中的GUID,想得到它有两个办法：1跟设备的提供者索要。2在注册表里找，一般在：HKEY_LOCAL_MACHINE/SYSTEM/Con

2、trolSet001/Control/DeviceClasses/3设备路径根据设备GUID，枚举所有USB　HOST，找匹配的USB设备，然后获取其路径。3.1头文件usbport.h#defineWINVER0x0500#include#include#include#include#include#include #pragmacomment(lib,"setup

3、api.lib")#pragmacomment(lib,"hid.lib")#pragmacomment(lib,"comctl32.lib") #ifndefBULKUSBH_INC#defineBULKUSBH_INC #defineBULKUSB_IOCTL_INDEX 0x0000  #defineIOCTL_BULKUSB_GET_CONFIG_DESCRIPTOR    CTL_CODE(FILE_DEVICE_UNKNOWN, /                           

4、                       BULKUSB_IOCTL_INDEX,/                                                  METHOD_BUFFERED, /                                                  FILE_ANY_ACCESS)                                                  #defineIOCTL_BULKUSB_RE

5、SET_DEVICE  CTL_CODE(FILE_DEVICE_UNKNOWN, /                                                  BULKUSB_IOCTL_INDEX+1,/                                                  METHOD_BUFFERED, /                                                  FILE_ANY_ACCESS) 

6、                                                                                                              #defineIOCTL_BULKUSB_RESET_PIPE CTL_CODE(FILE_DEVICE_UNKNOWN, /                                                  BULKUSB_IOCTL_INDEX+2,/     

7、                                             METHOD_BUFFERED, /                                                  FILE_ANY_ACCESS)            externHANDLE           open_file(char*filename);externint             GetUsbPath(char*path);externint         

8、     WriteUsb(HANDLEhUsb,char*Outbuff,intlen);externint              ReadUsb(HANDLEhUsb,BYTEinbuff[],DWORD&nBytesRead,intnToRead);3.2源文件usbport.cpp#include"usbport.h" //8a3bf75d-83c7-440e-8276-5ae3f3ea6e77DEFINE_GUID(GUID_CLASS_I82930_BULK,0x8