User manual

Microgate MicroGraph LED User Manual Page 68 of 88
3.2 GRAPHICAL FRAME (GRAPH PROTOCOL)
The benefit of the graphical frame is that it allows you to display images and active objects, as well
as text strings.
The position of strings and images is not limited to rows or columns, each object is positioned
completely freely and makes reference to the coordinates in pixels with respect to the angle in
the top left corner of the MicroGraph LED display board. The objects have as reference their
point in the top left corner (provided that it has not been set differently).
To use the display board in graphical mode it is necessary to send the commands to the identifier
(see address field) ‘@’. The first MicroGraph LED is in charge of transmitting the data to the
others. If data is sent to the graphical display boards with an address composed of ‘A’, ‘B’, and so
on, they must be interpreted as commands of the μTAB and treated as such.
The command frame format is different for commands sent to the graphical display board,
therefore it is important not to mix the identifiers. At the beginning of the Data area, 2 words are
inserted with coordinates in pixels of the command starting point and a byte containing the Binary
Operation to execute.
NOTE: The Binary Operator is not actually used for all commands (e.g. for the PAUSE command),
but it is still necessary to send it.