1.USB定义，VID是什么，PID是什么,他们有什么用？
USB(Universal Serial BUS,通用串行总线)；
VID(Vender ID供应商识别码)和PID(Product ID产品识别码)；
每一个USB设备都有VID和PID；
其中，VID是由供应商向USB-IF(Implementers Forum 应用者论坛)申请。每一个供应商的VID是唯一，PID是由供应商自行决定；
主机通过VID和PID来识别不同的设备，根据他们（以及设备的版本号），可以给设备加载或安装相应的驱动程序。
VID和PID的长度都是两个字节。
2.常见供应商的VID和PID，可以在哪里查询的到？
我是链接，快点我
3.VID和PID有两种存储方式？
第一种是主控制生厂商的VID和PID，存储在主控的bootcode中；
第二种是设备生厂商的VID和PID,该VID和PID存储在主控外的非易失存储设备中(EEPROM或Flash)的设备固件中；
当USB设备连接主机时，如果固件中有设备生产商的VID和PID报告给主机，而是忽略主控生产商的VID和PID；
理论上一个USB存储设备的VID是设备生厂商的VID,而不是主控生厂商的VID,这两个VID应该是不同的（主控生厂商自己生产的设备除外）；
4.常见的VID和PID有哪些？
{USB_DEVICE (0x0733, 0x0430)}, /* Intel PC Camera Pro */ {USB_DEVICE (0x0733, 0x0401)}, /* Intel Create and Share */ {USB_DEVICE (0x99FA, 0x8988)}, /* Grandtec V.cap */ {USB_DEVICE (0x0733, 0x0402)}, /* ViewQuest M318B */ {USB_DEVICE (0x0733, 0x0110)}, /* ViewQuest VQ110 */ {USB_DEVICE (0x040A, 0x0002)}, /* Kodak DVC-325 */ {USB_DEVICE (0x055f, 0xc420)}, /* Mustek gSmart Mini 2 */ {USB_DEVICE (0x055f, 0xc520)}, /* Mustek gSmart Mini 3 */ {USB_DEVICE (0x041E, 0x400A)}, /* Creative PC-CAM 300 */ {USB_DEVICE (0x084D, 0x0003)}, /* D-Link DSC-350 */ {USB_DEVICE (0x041E, 0x400B)}, /* Creative PC-CAM 600 */ {USB_DEVICE (0x8086, 0x0630)}, /* Intel Pocket PC Camera */ {USB_DEVICE (0x8086, 0x0110)}, /* Intel Easy PC Camera */ {USB_DEVICE (0x0506, 0x00df)}, /* 3Com HomeConnect Lite */ {USB_DEVICE (0x040a, 0x0300)}, /* Kodak EZ200 */ {USB_DEVICE (0x04fc, 0x504b)}, /* Maxell MaxPocket LE 1.3 */ {USB_DEVICE (0x08ca, 0x2008)}, /* Aiptek Mini PenCam 2 M */ {USB_DEVICE (0x08ca, 0x0104)}, /* Aiptek PocketDVII 1.3 */ {USB_DEVICE (0x08ca, 0x2018)}, /* Aiptek Pencam SD 2M */ {USB_DEVICE (0x04fc, 0x504a)}, /* Aiptek Mini PenCam 1.3 */ {USB_DEVICE (0x055f, 0xc530)}, /* Mustek Gsmart LCD 3 */ {USB_DEVICE (0x055f, 0xc650)}, /* Mustek MDC5500Z */ {USB_DEVICE (0x052b, 0x1513)}, /* Megapix V4 */ {USB_DEVICE (0x08ca, 0x0103)}, /* Aiptek PocketDV */ {USB_DEVICE (0x0af9, 0x0010)}, /* Hama USB Sightcam 100 */ {USB_DEVICE (0x1776, 0x501c)}, /* Arowana 300K CMOS Camera */ {USB_DEVICE (0x08ca, 0x0106)}, /* Aiptek Pocket DV3100+ */ {USB_DEVICE (0x08ca, 0x2010)}, /* Aiptek PocketCam 3M */ {USB_DEVICE (0x0458, 0x7004)}, /* Genius VideoCAM Express V2 */ {USB_DEVICE (0x04fc, 0x0561)}, /* Flexcam 100 */ {USB_DEVICE (0x055f, 0xc430)}, /* Mustek Gsmart LCD 2 */ {USB_DEVICE (0x04fc, 0xffff)}, /* Pure DigitalDakota */ {USB_DEVICE (0xabcd, 0xcdee)}, /* Petcam */ {USB_DEVICE (0x04a5, 0x3008)}, /* Benq DC 1500 */ {USB_DEVICE (0x046d, 0x0960)}, /* Logitech Inc. ClickSmart 420 */ {USB_DEVICE (0x046d, 0x0901)}, /* Logitech Inc. ClickSmart 510 */ {USB_DEVICE (0x04a5, 0x3003)}, /* Benq DC 1300 */ {USB_DEVICE (0x0af9, 0x0011)}, /* Hama USB Sightcam 100 */ {USB_DEVICE (0x055f, 0xc440)}, /* Mustek DV 3000 */ {USB_DEVICE (0x041e, 0x4013)}, /* Creative Pccam750 */ {USB_DEVICE (0x060b, 0xa001)}, /* Maxell Compact Pc PM3 */ {USB_DEVICE (0x04a5, 0x300a)}, /* Benq DC3410 */ {USB_DEVICE (0x04a5, 0x300c)}, /* Benq DC1016 */ {USB_DEVICE (0x0461, 0x0815)}, /* Micro Innovation IC200 */ {USB_DEVICE (0x046d, 0x0890)}, /* Logitech QuickCam traveler */ {USB_DEVICE (0x10fd, 0x7e50)}, /* FlyCam Usb 100 */ {USB_DEVICE (0x06e1, 0xa190)}, /* ADS Instant VCD */ {USB_DEVICE (0x055f, 0xc220)}, /* Gsmart Mini */ {USB_DEVICE (0x0733, 0x2211)}, /* Jenoptik jdc 21 LCD */ {USB_DEVICE (0x046d, 0x0900)}, /* Logitech Inc. ClickSmart 310 */ {USB_DEVICE (0x055f, 0xc360)}, /* Mustek DV4000 Mpeg4 */ {USB_DEVICE (0x08ca, 0x2024)}, /* Aiptek DV3500 Mpeg4 */ {USB_DEVICE (0x046d, 0x0905)}, /* Logitech ClickSmart820 */ {USB_DEVICE (0x05da, 0x1018)}, /* Digital Dream Enigma 1.3 */ {USB_DEVICE (0x0c45, 0x6025)}, /* Xcam Shanga */ {USB_DEVICE (0x0733, 0x1311)}, /* Digital Dream Epsilon 1.3 */ {USB_DEVICE (0x041e, 0x401d)}, /* Creative Webcam NX ULTRA */ {USB_DEVICE (0x08ca, 0x2016)}, /* Aiptek PocketCam 2 Mega */ {USB_DEVICE (0x0734, 0x043b)}, /* 3DeMon USB Capture aka */ {USB_DEVICE (0x041E, 0x4018)}, /* Creative Webcam Vista (PD1100) */ {USB_DEVICE (0x0546, 0x3273)}, /* Polaroid PDC2030*/ {USB_DEVICE (0x041e, 0x401f)}, /* Creative Webcam Notebook PD1171*/ {USB_DEVICE (0x041e, 0x4017)}, /* Creative Webcam Mobile PD1090*/ {USB_DEVICE (0x046d, 0x08a2)}, /* Labtec Webcam Pro*/ {USB_DEVICE (0x055f, 0xd003)}, /* Mustek WCam300A*/ {USB_DEVICE (0x0458, 0x7007)}, /* Genius VideoCam V2*/ {USB_DEVICE (0x0458, 0x700c)}, /* Genius VideoCam V3*/ {USB_DEVICE (0x0458, 0x700f)}, /* Genius VideoCam Web V2*/ {USB_DEVICE (0x041e, 0x401e)}, /* Creative Nx Pro*/ {USB_DEVICE (0x0c45, 0x6029)}, /* spcaCam@150 */ {USB_DEVICE (0x0c45, 0x6009)}, /* spcaCam@120 */ {USB_DEVICE (0x0c45, 0x600d)}, /* spcaCam@120 */ {USB_DEVICE (0x04fc, 0x5330)}, /* Digitrex 2110*/ {USB_DEVICE (0x055f, 0xc540)}, /* Gsmart D30*/ {USB_DEVICE (0x0ac8, 0x301b)}, /* Asam Vimicro*/ {USB_DEVICE (0x041e, 0x403a)}, /* Creative Nx Pro 2*/ {USB_DEVICE (0x055f, 0xc211)}, /* Kowa Bs888e Microcamera*/ {USB_DEVICE (0x0ac8, 0x0302)}, /* Z-star Vimicro zc0302*/ {USB_DEVICE (0x0572, 0x0041)}, /* Creative Notebook cx11646*/ {USB_DEVICE (0x08ca, 0x2022)}, /* Aiptek Slim 3200*/ {USB_DEVICE (0x046d, 0x0921)}, /* Labtec Webcam */ {USB_DEVICE (0x046d, 0x0920)}, /* QC Express */ {USB_DEVICE (0x0923, 0x010f)}, /* ICM532 cams */ {USB_DEVICE (0x055f, 0xc200)}, /* Mustek Gsmart 300 */ {USB_DEVICE (0x0733, 0x2221)}, /* Mercury Digital Pro 3.1p*/ {USB_DEVICE (0x041e, 0x4036)}, /* Creative Live ! */ {USB_DEVICE (0x055f, 0xc005)}, /* Mustek Wcam300A */ {USB_DEVICE (0x041E, 0x403b)}, /* Creative Webcam Vista (VF0010) */ {USB_DEVICE (0x0545, 0x8333)}, /* Veo Stingray */ {USB_DEVICE (0x0545, 0x808b)}, /* Veo Stingray */ {USB_DEVICE (0x10fd, 0x8050)}, /* Typhoon Webshot II USB 300k */ {USB_DEVICE (0x0000, 0x0000)}, /* MystFromOri Unknow Camera */
