Decaker support

[ekaitz-zarraga]

Add support for Decaker.

camrein/EzGraver#43

@lonelymyp had info about it.

This issue is for discussion.

[lonelymyp]

The most incomprehensible thing for me is the image format which is sent to the printer.

it seems that there is a certain numbering
and error correction? the sum in the square = 1D, except the green square

[ekaitz-zarraga]

What image are you sending to the engraver?

[ekaitz-zarraga]

Watching that capture the things you marked in black look like column number and the row 02 (and 06 and so on) looks like the row number.

That's why one of them increases and the other increases and decreases later. It's like the image that the engraver recieves is what it's supposed to print, literally. I think the 1A column in your trace is just accidental.

EDIT: I may have an idea:

I see it's based on 4 byte chunks with this shape:

CC 00 RR FF

CC = Column number, 1 Byte. Increases left to right, and then decreases in the next row (right to left)
RR = Row number, 1 Byte. Increases all the time.