RS- 2 3 2 C O N T R O L P R O T O C O L
81
<Response> = <Start of Response><Command Code><sp><Result Code>
[<sp><Parameters>]<End of Response>
<Start of Response> = @, ASCII 0x40
<Command Code> = <byte><byte><byte>
<Result Code> = OK|ER
<sp> = space, ASCII 0x20
<Parameters> = command-specific
<End of Response> = CR, ASCII 0x0d
Status Update Messages Structure:
If the verbose mode is set to 2 or 3, the player will send status update messages automatically. These
messages are not a response to any particular command. Any status change caused by commands
from RS232 control, front panel buttons, IR remote control, or playback progress may trigger status
update messages.
The status update messages have the following structure:
<Update> = <Start of Upd
ate><Status Code>[
<sp><Param
eters>]<End of Update>
<Start of Update> = @, ASCII 0x40
<Status Code> = <byte><byte><byte>
<sp> = space, ASCII 0x20
<Parameters> = status-specific
<End of Response> = CR, ASCII 0x0d
Command Sequence:
Commands are executed in the order they are received. The control client should wait for a response
from the player before sending the next command.
If the player receives a new command before executing the previous command, the player may execute
the commands in sequence or discard the previous command, depending on the internal processing of
the player. The control client should avoid sending multiple commands in sequence without waiting for a
response.
If the host does not receive a response from the player 10 seconds after the command is issued, the
host may consider the command or response lost during transmission, and can retransmit the
command.
Command List:
A. Command that maps to a remote control button
This group of commands maps directly to the infrared remote control keys. No parameters are needed
for these commands. The player handles the commands as if it receives the same IR remote
commands. For actions that require a multiple-key sequence, such as go to a certain chapter (GOT
command followed by multiple numeric key commands and the SEL command), the player responds to
each command individually until the last command is received. At that time the player shall respond
with either OK or ER depending on the result of the action.
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