Hi,

I changed my mind: the app will be based on a board file - your board
file, Seb ;)

My first step in this will be the serial support and this looks
straight forward.


And when this is done, i2c slave could be added.
There is already one issue: straight forward implementation will
generate one i2c message for each byte written to the display. This
could be made smarter (read: more efficient) but that requires a
command like _lcd_flush().
And the use of this flush could be integrated into h44780_common,
making it a bit more efficient. I think this is not worth the effort.
We could also let the user call flush and that would make it much more
efficient. But when the user does not call flush (but did configure he
would) then there will be delayed updates...
What do you think?

Joep

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