User Manual
VK202-25 rev. 05
30
7.7 Miscellaneous Commands
Table 7-4 Miscellaneous Commands
Command Syntax Default Notes
Clear display FE 58
254 88
254 'X'
n/a Clears screen of text and graphics, places text
cursor at top left.
Set brightness FE 59 [brightness]
254 89 [brightness]
254 'Y' [brightness]
0x03
100%
Sets display brightness. Brightness is a value
between 0x00 and 0x03. 0x00=25%,
0x01=50%, 0x02=75%, 0x03=100%.
Display on FE 42 [minutes]
254 66 [minutes]
254 'B' [minutes]
on
Display will stay on for [minutes]. If [minutes] =
0 display will stay on permanently. Maximum
value for [minutes] is 100.
Display off FE 46
254 70
254 'F'
on
Turns off display.
Load startup screen FE 40 [40 char]
254 64 [40 char]
254 '@' [40 char]
Matrix Orbital
VK202-25
Loads new startup screen (40 characters).
Screen is saved for subsequent power ups.
General purpose
output off
FE 56 [gpo #]
254 86 [gpo #]
254 'V' [gpo #]
off Turns a general purpose output OFF. [gpo #]
may be from 1 to 6. See section 2.2 for further
details.
General purpose
output on
FE 57 [gpo #]
254 87 [gpo #]
254 'W' [gpo #]
off Turns a general purpose output ON. [gpo #]
may be from 1 to 6. See section 2.2 for further
details.
Set I
2
C address FE 33 [address]
254 51 [address]
254 '3' [address]
0x50 Value is write address and must be even, read
address is 1 higher.
Read module type FE 37
254 55
254 '7'
see table Reads the module type. See table in section
6.1.9. This will return a 1 byte hex value.
Set RS232 port
speed
FE 39 [speed]
254 57 [speed]
254 '9' [speed]
19,200 baud Sets RS232 speed. See table in section
6.1.10 for values of [speed]
Set Serial Number
FE 34 [byte1][byte2]
254 52
[byte1][byte2]
254 '4' [byte1][byte2]
This is a one-time-use command which works
only on units without factory set serial
numbers.
Read Serial Number FE 35
254 53
254 '5'
Reads the two byte serial number of the
module.
Read Version
Number
FE 36
254 54
254 '6'
Reads the firmware version number of the
module. This will return a 1 byte hex value.
Enter flow control
mode
FE 3A [full] [empty]
254 58 [full] [empty]
off Sets "full" and "empty" marks for the 80 byte
display buffer. When buffer reaches [full]