C6748 startware 默认的USB_bulk例程是USB1.1，每包64字节，请问如何提升至USB2.0，每包512字节？

BOB JOHN

本人修改了usbbulck.c的描述符

unsigned char g_pBulkDeviceDescriptor[] =
{
18, // Size of this structure.
USB_DTYPE_DEVICE, // Type of this structure.
USBShort(0x200), // USB version 1.1 (if we say 2.0, hosts assume by zhang
// high-speed - see USB 2.0 spec 9.2.6.6)
USB_CLASS_VEND_SPECIFIC, // USB Device Class
0, // USB Device Sub-class
0, // USB Device protocol
512, // Maximum packet size for default pipe.
USBShort(0), // Vendor ID (VID).
USBShort(0), // Product ID (PID).
USBShort(0x100), // Device Version BCD.
1, // Manufacturer string identifier.
2, // Product string identifier.
3, // Product serial number.
1 // Number of configurations.
};