这一段没看懂：
/* get usb other-speed descriptor */
case USB_DESCR_TYP_SPEED:
if( USBHS_DevSpeed == USBHS_SPEED_HIGH )
{
/* High speed mode为啥高速模式拷贝的是fs的配置？ */
memcpy( &TAB_USB_HS_OSC_DESC[ 2 ], &MyCfgDescr_FS[ 2 ], DEF_USBD_CONFIG_FS_DESC_LEN - 2 );
pUSBHS_Descr = ( uint8_t * )&TAB_USB_HS_OSC_DESC[ 0 ];
len = DEF_USBD_CONFIG_FS_DESC_LEN;
}
else if( USBHS_DevSpeed == USBHS_SPEED_FULL )
{
/* Full speed mode 这里正好反过来？ */
memcpy( &TAB_USB_FS_OSC_DESC[ 2 ], &MyCfgDescr_HS[ 2 ], DEF_USBD_CONFIG_HS_DESC_LEN - 2 );
pUSBHS_Descr = ( uint8_t * )&TAB_USB_FS_OSC_DESC[ 0 ];
len = DEF_USBD_CONFIG_HS_DESC_LEN;
}
else
{
errflag = 0xFF;
}
break;
/* USB Full-Speed Mode, Other speed configuration Descriptor */
uint8_t TAB_USB_FS_OSC_DESC[ sizeof(MyCfgDescr_HS) ] =
{
/* Other parts are copied through the program */
0x09, 0x07,
};
/* USB High-Speed Mode, Other speed configuration Descriptor */
uint8_t TAB_USB_HS_OSC_DESC[ sizeof(MyCfgDescr_FS) ] =
{
/* Other parts are copied through the program */
0x09, 0x07,
};
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