ViewSonic CD4233, Hardware Interface Spec And Software Protocols

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Commercial Display RS-232 Protocol
Revision 1.x
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May 28, 2007 3 / 16
Commercial Display RS-232 Protocol
TV ID Identification for each of TV
Command
Type
Identify command type,
“s” (0x73h) : Set Command
“g” (0x67h) : Get Command
“r” (0x72h) : Reply Command
“p” (0x70h) : RCU Pass-through
“+” (0x2Bh) : 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
3.2 Set-Function Listing
The PC can control the LCD Monitor for specific actions. The Set-Function command allows you to
control the LCD monitor behavior in a remote sit through the RS232 port. The Set-Function packet
format consists of 11 bytes.
Set-Function description:
Length: Total Byte of Message excluding “CR”
TV ID Identification for each of TV
If we want to set all TV settings, TV ID can use “
99 ” to achieve, and
it will not have Reply command on this function.
Command
Type Identify command type,
“s” (0x73h) : Set Command
Command: Function command code: One byte ASCII code
Value[1~3]: Three bytes ASCII that defines the value
CR 0x0D
Set-Function format
Send: (Command Type=”s”)
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=”+” or “-”)
Name Length ID Command
Type
CR
Byte
Count
1 Byte 2 Byte 1 Byte 1 Byte
Bytes
order 1 2~3 4 5
Example1: Set Brightness as 76 for TV-02 and this command is valid
Send (Hex Format)
Name Length ID Command
Type
Command Value1 Value2 Value3 CR
Hex 0x38 0x30
0x32 0x73 0x24 0x30 0x37 0x36 0x0D