3.2. ctrlmsg.h

usblib_ctrl_msg - Sends an USB standard contrl message
USBLIB_CTRLMSG_SIZEFROMUSED - flag for USBLIB_CTRLMSG to alter size field in message This flag changes the size field of the usb message to be calculated from the data->used_size instead of data->size

Synopsis of function. macros and structures contained in ctrlmsg.h