NEC LCD3215 - MultiSync - 32" LCD Flat Panel Display, Control Manual

Page: 18 / 37

(18/37)
8.2 Asset Data write
This command is used in order to write Asset Data.
1) The controller requests the monitor to write Asset data.
Header Message Check code Delimiter
SOH-'0'-'A'-'0'-'A'-N-N STX-'C'-'0'-'0'-'E'-'0'-'0'-
Data(0)-Data(1)---Data(N)-ETX BCC CR
Header
SOH (01h): Start Of Header
'0' (30h): Reserved
'A' (41h): Monitor ID
LCD3215/LCD4215 must be ASCII 'A' (41h).
'0' (30h): Message sender is the controller
'A' (41h): Message type is "Command"
N-N: Message length.
Note.) The maximum data length that can be written to the monitor at a time is 32bytes.
Ex.) The byte data 20h is encoded as ASCII characters '2' and '0' (32h and 30h).
Message
STX (02h): Start of Message
'C'-'0'-'0'-'E' (43h, 30h, 30, 45h): Asset Data writes command
'0'-'0': Offset address from top of Asset data.
00h : Write data from top of the Asset data area.
20h : Write data from the 32bytes offset point in the Asset data area.
Data0 - DataN: Asset data. The data must be ASCII characters strings.
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 data for confirmation.
Header Message Check code Delimiter
SOH-'0'-'0'-'A'-'B'-N-N STX-'0'-'0'-'C'-'0'-'0'-'E'-'0'-'0'-
Data(0)-Data(1)---Data(N)-ETX BCC CR
Header
SOH (01h): Start Of Header
'0' (30h): Reserved
'0' (30h): Message receiver is the controller
'A' (41h): Monitor ID
LCD3215/LCD4215 must be ASCII 'A' (41h).
'B' (42h): Message type is "Command reply"
N-N: Message length.
Note.) The maximum data length that can be written to the monitor at a time is 32bytes.
Ex.) The byte data 20h is encoded as ASCII characters '2' and '0' (34h and 30h).
Message
STX (02h): Start of Message
'0'-'0': Result code. No error
'C'-'0'-'0'-'E' (43h, 30h, 30h, 45h): Asset Data write command
'0'-'0': Offset address from top of Asset data.
00h : Write data into from top of the Asset data area.
20h : Write data into from the 32bytes offset point in the Asset data area.
Data(0)
–
- Data(N): Asset data. The data must be ASCII characters strings.
ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.5
“
Check code
”
for a BCC calculation.