The USB bootloader can take a while to be ready / Linux takes a while
to set up the interface.
1s is right at the edge, leading to races and often failed flashing.
Bump the delay to 2s for a wider safety margin, with this flashing is
a lot more reliable.
This feature is only used to blacklist stdio via CDC ACM.
Introduce the `highlevel_stdio` feature instead to indicate
that stdio functionality requires a running thread to print
anything
The private parts need USB definitions (and are thus preferably used
from USB_H_USER_IS_RIOT_INTERNAL compilation units). Functions like
usb_board_reset_in_bootloader do not depend on USB headers for their
definitions and are fair game throughout the application even for
generic RIOT USB devices.
This module implements the 2 functions called when requesting a board 'reset in application' and 'board reset in bootloader' actions.
This module will also configure the behaviour of bossa flasher and has a dependency on USBUS CDC ACM module for providing STDIO over USB
