ViewSonic IFP62 Series, User Manual

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102
Get-Function Listing
The PC can interrogate the LFD for specific information. The Get-Function packet
format consists of 9 bytes which is similar to the Set-Function packet structure.
Note that the “Value” byte is always = 000.
Get-Function Description:
Length:
Total Byte of Message excluding “CR”.
TV/DS ID Identification for each of TV/DS (01~98; default is 01).
Command Type
Identify command type,
“g” (0x67h) : Get Command
“r” (0x72h) : Valid command Reply
“-“ (0x2Dh) : Invalid command Reply
Command:
Function command code: One byte ASCII code.
Value[1~3]: Three bytes ASCII that defines the value.
CR
0x0D
Get-Function Format
Send: (Command Type=“g”)
Name Length ID Command Type Command Value1 Value2 Value3 CR
Byte
Count
1 Byte 2
Byte
1 Byte 1 Byte 1 Byte 1 Byte 1 Byte 1
Byte
Bytes
order
1 2~3 4 5 6 7 8 9
Reply: (Command Type=“r” or “-”)
If the Command is valid, Command Type = “r”
Name Length ID Command Type Command Value1 Value2 Value3 CR
Byte
Count
1 Byte 2
Byte
1 Byte 1 Byte 1 Byte 1 Byte 1 Byte 1
Byte
Bytes
order
1 2~3 4 5 6 7 8 9
If the Command is NOT valid, Command Type = “-”
Name Length ID Command Type CR
Byte
Count
1 Byte 2 Byte 1 Byte 1 Byte
Bytes
order
1 2~3 4 5