Under Python 3, it causes stdout to remain a string-IO stream
whereas the fdopen'ed stream is byte-oriented.

os.fdopen() works both under Windows and unixoid systems, so use
it that way.

ticks[0] contains the low part, ticks[1] the high part - the
high part needs to be multiplied by self.ticknb before adding
the low part (and multipliying all by self.tscale)

"timeset 1638480423" is 19 bytes long (including terminator), so
16 was too small.

Revert "started creation of PLATFORM virtualization and adopted code to use macros of boad.h/platform_*.h"

This reverts commit 8276f678.

That feature development was moved to branch samr21_porting

Comparing a byte-string member against b'\xNN' doesn't make sense,
compare against 0xNN instead.

map() yields a map object in Python3, turn into a list using list()

Also, it's a poor idea to have a pass-all for exceptions, so give
it at least some attention when it happens.

Still not yet complete, packet serialisation needs more work.

replaced avr-libc specific "_BV(" by "(1<<" to make code re-usable for different compilers, except for avr-libc specific board*.h

moved the Python tests into a single script, together with scons, because of the Bitbucket error "currently only one step supported"

integrate into bitbucket pipelines

made it Python3 and Python2 proof