Matrix Orbital VFD2041 Legacy - Manual (Page 26)

This gives rise to the possibility of confusion when parameters are being set on the display. For example,
the GPO ON and OFF commands use a number to indicate which GPO is being controlled. We’re told that
acceptable values are 0 to 8. All such parameters must use numeric values (i.e., the actual byte values). If
we send the ASCII number 0 by mistake it will actually give the value 48 decimal (30 hex) to the parameter,
which is wrong.
In the tables given in the following sections ASCII characters are shown as ’A’, with single quotes.
6.4 Text Commands
Syntax in the tables below is given in hex, decimal and decimal with ASCII, in that order, one per line.
Table 13: Text Commands
Command Syntax Default Notes
Auto line wrap on FE 43
254 67
254’C’
off Enables line
wrapping (not
word wrap).
Auto line wrap off FE 44
254 68
254 ’D’
off Disables line
wrapping.
Auto scroll on FE 51
254 81
254 ’Q’
off Enables scroll at
bottom of screen.
Text will push
display up one
line to make room
for new line.
Auto scroll off FE 52
254 82
254 ’R’
off Disables auto
scroll. Text will
wrap to top left
and overwrite
existing text.
Set cursor position FE 47 [col][row]
254 71 [col][row]
254 ’G’ [col][row]
n/a Moves cursor
to the specified
column and row.
The cursor marks
the text insertion
point in this and
all commands.
Send cursor home FE 48
254 72
254 ’H’
n/a This command
moves the cursor
to the top left of
the display area.
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