NEC LCD Monitor, Manual

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16. Firmware Version
16.1 Firmware Version Read
This command is used in order to read a firmware version.
1) The controller requests the monitor to reply a firmware version.
Header Message Check code Delimiter
SOH-'0'-Monitor ID-
'0'-'A'-'0'-'8'
STX-'C'-'A'-'0'-'2'-TY-ETX BCC CR
Header
SOH (01h): Start of Header
'0' (30h): Reserved
Monitor ID: Specify the Monitor ID of which you want to change a setting.
Ex.) If Monitor ID is '1', specify 'A'.
'0' (30h): Message sender is the controller.
'A' (41h): Message type is "Command".
'0'-'8'(30h, 38h): Message length (8bytes)
Message
STX (02h): Start of Message
'C'-'A'-'0'-'2' (43h, 41h, 30h, 32h): Firmware Version Command
TY: Firmware Type
Firmware1
: 00h (30h, 30h)
Firmware2 : 01h (30h, 31h)
ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.5
“
Check code
”
for a BCC calculation.
Delimiter
CR (0Dh): End of packet
2) The monitor replies a firmware version to the controller.
Header Message Check code Delimiter
SOH-'0'-Monitor ID-
'0'-'B'-'1'-'8'
STX-'C'-B'-'0'-'2'-ST-TY-MV-
PP-BV1-BV2-BV3-BR1-BR2-ETX
BCC CR
Header
SOH (01h): Start of Header
'0' (30h): Reserved
'0' (30h): Message receiver is the controller.
Monitor ID: Indicate a replying Monitor ID.
Ex.) When this byte is set to
‘
A
’
, replying monitor
’
s ID is
‘
1
’
.
'B' (42h): Message type is "Command reply".
'1'-'8'(31h, 38h): Message length (24bytes)
Message
STX (02h): Start of Message
'C'-'B'-'0'-'2' (43h, 42h, 30h, 32h): Firmware Version Read reply
ST: Error Status
No Error : 00h (30h, 30h)
Error
: 01h (30h, 31h)
TY: Firmware Type
Firmware1
: 00h (30h, 30h)
Firmware2 : 01h (30h, 31h)
MV: Major Version:
00h (30h, 30h)
–
09h (30h, 39h)
PP: Period: