18
AHnet protocol
AHnet PROTOCOL
Using 5 bytes communication:
BYTE 0
START BYTE
BYTE 1
ADDRESS BYTE
BYTE 2
COMMAND BYTE
BYTE 3
VALUE 1
BYTE 4
VALUE2
COMMANDS
COMMAND
DESCRIPTION
RESPONSE
FA XX 01 01 00
GO UP
FB XX 01 01 00
FA XX 01 00 00
GO DOWN
FB XX 01 00 00
FA XX 02 01 00
SCREEN ON
FB XX 02 01 00
FA XX 02 00 00
SCREEN OFF
FB XX 02 00 00
FA XX 03 01 00
DVI-A SELECTION
FB XX 03 01 00
FA XX 03 00 00
DVI-1 SELECTION
FB XX 03 00 00
FA XX 03 03 00
DVI-2 SELECTION
FB XX 03 03 00
FA XX 04 01 00
BUTTON LOCK
FB XX 04 01 00
FA XX 04 00 00
BUTTON UNLOCK
FB XX 04 00 00
FA XX 14 00 00
INQUIRY CONTROL BYTE
FB XX 14 CB1 CB2
XX
Number of the monitor address.
Up to 30 monitors for each RS422 BUS
CB1
Response in 8 bits of the monitor status
CB2
Response in 8 bits of the monitor status