Asset Data Read And Write - NEC MultiSync LCD3210 LCD3210 LCD3210 Owner's Manual

8. Asset Data read and write

8.1 Asset Data Read Request and reply
This command is used in order to read Asset Data.
1) The controller requests the monitor to reply with Asset data.
Header
SOH-'0'-'A'-'0'-'A'-'0'-'A'
Header
SOH (01h): Start Of Header
'0' (30h): Reserved
'A' (41h): Monitor ID
LCD3210 must be ASCII 'A' (41h).
'0' (30h): Message sender is the controller
'A' (41h): Message type is "Command"
'0'-'A' (30h, 41h): Message length is 10 bytes
Message
STX (02h): Start of Message
'C'-'0'-'0'-'B' (43h, 30h, 30, 42h): Asset read request command
'0'-'0' (30h, 30h): Offset data from top of the Asset data.
At first set 00h: Read data from the top of Asset data area.
Secondly set 20h: Read data from the 32bytes offset point in the Asset data area.
'2'-'0' (32h, 30h): Read out data length is 32bytes.
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 Asset data to the controller.
SOH-'0'-'0'-'A'-'B'-N-N
Header
SOH (01h): Start of Header
'0' (30h): Reserved
'0' (30h): Message receiver is the controller
'A' (41h): Monitor ID
LCD3210 must be ASCII 'A' (41h).
'B' (42h): Message type is "Command reply"
N-N: Message length
Ex.) The byte data 20h is encoded to ASCII characters '2' and '0' (32h and 30h).
Note.) This length is includes STX and ETX.
Message
STX (02h): Start of Message
'C'-'1'-'0'-'B' (43h, 31h, 30, 42h): Asset read reply command
Data(0) – Data(N): Retuned Asset data.
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
STX-'C'-'0'-'0'-'B'-'0'-'0'-'2'-'0'-ETX
Maximum readout length is 32bytes at a time.
Header
STX-'C'-'1'-'0'-'B'-
Data(0)-Data(1)---Data(N)-ETX
Message
Message
(18/38)
Check code Delimiter
BCC CR
Check code Delimiter
BCC CR