大家来看看我用USBVIEW得到的数据，好象有问题（端点的最大分组尺寸）谢谢 ）

Device Descriptor:
bcdUSB:             0x0100
bDeviceClass:         0xDC
bDeviceSubClass:      0x00
bDeviceProtocol:      0x00
bMaxPacketSize0:      0x10 (16)
idVendor:           0x0471 (Philips)
idProduct:          0x0666
bcdDevice:          0x0100
iManufacturer:        0x00
iProduct:             0x00
iSerialNumber:        0x00
bNumConfigurations:   0x01

ConnectionStatus: DeviceConnected
Current Config Value: 0x01
Device Bus Speed:     Full
Device Address:       0x02
Open Pipes:              4

Endpoint Descriptor:
bEndpointAddress:     0x81
Transfer Type:   Interrupt
wMaxPacketSize:     0x0010 (16)
bInterval:            0x0A

Endpoint Descriptor:
bEndpointAddress:     0x00
Transfer Type:     Control
wMaxPacketSize:     0x0507 (1287)
wInterval:          0x0301
bSyncAddress:         0x10

Endpoint Descriptor:
bEndpointAddress:     0x00
Transfer Type:        Bulk
wMaxPacketSize:     0x0001 (1)
wInterval:          0x0000
bSyncAddress:         0x07

Endpoint Descriptor:
bEndpointAddress:     0x05
Transfer Type:        Bulk
wMaxPacketSize:     0x4002 (16386)
wInterval:          0x0A00
bSyncAddress:         0x00

[编辑 -  7/11/03 by  djsnake]

你说那里有问题啊？不同的包和相同的包用于不同的工作方式时包的大小都是不一样的啊。

你可以改固件程序，在CHAP_9中。直接改对应的数据就是了