Lemz_SwCtrlStmProj/App/usb/usb_transfer_flags.h

#ifndef USB_TRANSFER_FLAGS_H
#define USB_TRANSFER_FLAGS_H
    #include "app/usb/usb_transfers.h"

    // @USB_TRANSFER_FLAG_SHORTPACKET
    // The bitwise flag used to indicate weither the short packet has received at last OUT transaction or not.
    #define USB_TRANSFER_FLAG_SHORTPACKET   (1ul << 0)             // Short packet flag

    static inline bool usb_transfer_check_shortpacket( sUSBTransfer_t * transf )
    {
        // check if the last transaction was a Short-packet transaction
        return usb_transfer_check_flags_fast( transf, 
                  USB_TRANSFER_FLAG_SHORTPACKET, 
                  USB_TRANSFER_FLAG_SHORTPACKET, 
                  eUSBTransferFlagMode_Or );
    }

    static inline void usb_transfer_set_shortpacket( sUSBTransfer_t * transf )
    {
         // set the Short-packet signature for transaction
         usb_transfer_modify_flags( transf, USB_TRANSFER_FLAG_SHORTPACKET, USB_TRANSFER_FLAG_SHORTPACKET );

         // protect the flag from clearing
         usb_transfer_modify_flags_locks( transf, USB_TRANSFER_FLAG_SHORTPACKET, USB_TRANSFER_FLAG_SHORTPACKET );
    }

    static inline void usb_transfer_clear_shortpacket( sUSBTransfer_t * transf )
    {
         // un-protect the flag from clearing
         usb_transfer_modify_flags_locks( transf, USB_TRANSFER_FLAG_SHORTPACKET, 0 );

         // reset the Short-packet signature for transaction
         usb_transfer_modify_flags( transf, USB_TRANSFER_FLAG_SHORTPACKET, 0 );
    }
#endif