ViewSonic CD4233, Спецификация аппаратного интерфейса и протоколы программного обеспечения

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Commercial Display RS-232 Protocol
Revision 1.x
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May 28, 2007 7 / 16
Commercial Display RS-232 Protocol
3.3 Get-Function Listing
The PC can interrogate the LCD Monitor for specific information. The Get-Function packet format
consists of 5 bytes which is similar to the Set-Function packet structure. Note that the “Value” byte
is always = 00.
Get-Function description:
Length: Total Byte of Message excluding “CR”
TV ID Identification for each of TV
Command
Type Identify command type,
“g” (0x67h) : Get Command
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
Example1: Get Brightness from TV-05 and this command is valid.
The Brightness value is 67.
Send (Hex Format)
Name Length ID Command
Type
Command Value1 Value2 Value3 CR
Hex 0x38 0x30
0x35 0x67 0x62 0x30 0x30 0x30 0x0D
Reply(Hex Format)
Name Length ID Command
Type
Command Value1 Value2 Value3 CR
Hex 0x38 0x30
0x35
0x72 0x62 0x30 0x36 0x37 0x0D