A fairly mysterious situation happened recently in the MK3 branch.
After merging #3033 (change watchdogReset() into a single inline wdr instruction)
we were unable to flash languages.
Since it looked similarly suspicious like issue #2954 we started investigating deeply.
The problem was in the code as described in the comment in this PR.
It makes no sense keeping watchdogReset as a separate function which
must be called, since it only contains one instruction: "wdr".
Not only was the code larger by 32 bytes in total, but also much slower
(call+ret take 4 cycles together for no reason in this case).
Surprisingly, doing just this on FW 3.9.3 solves issue #2954 on the one
affected EINSY board, even though it makes not much sense (there must be
some other timing issue).
Remove internationalization macro for this message. It has no sense to be translated as internationalization in most cases doesn't work if it is not responding.
Show this message instead of splash screen if the error is encountered.
There is no additional delay or wait for click, as such functions doesn't work in setup function.
modified to update the external flash memory on Einsy boards.
Due to a bug in the USB to serial converter firmware on the Prusa Einsy
boards, the STK500 protocol has been modified to never send semicolon
characters towards the main processor.
This firmware updater is compatible with a modified avrdude using
the "arduino" protocol, see the following commit.
https://github.com/prusa3d/Slic3r/tree/fwupdater_languages
