3
Command and response formats
Communication between the remote controller (RC) and the BDP100/BDP300 takes the form of sequences of bytes, with all commands and responses
having the same basic format. e BDP100/BDP300 shall always respond to a received command, but may also send messages at other times.
Each transmission by the RC is the following format:
<St> <Zn> <Cc> <Dl> <Data> <Et>
St (Start transmission): 0x21 ‘!’
Zn (0x01): see below.
Cc (Command code): the code for the command
Dl (Data length): the number of data items following this item,excluding the ETR
Data: the parameters for the command
Et (End transmission): 0x0D
Each response by the BDP100/BDP300 is the following format::
<St> <Zn> <Cc> <Ac> <Dl> <Data> <Et>
St (Start transmission): 0x21 ‘!’
Zn (0x01): see below.
Cc (Command code): the code for the command
Ac (Answer code): see below.
Dl (Data Length): the number of data items following this item, excluding the ETR
Data: the parameters for the response of length n. n is limited to 255.
Et (End transmission): 0x0D
e BDP100/BDP300 responds to each command from the RC within three seconds. e RC may send further commands before a previous
command response has been received.
Controlling the BDP100/300 via RS232
Introduction
is document describes the remote control protocol for controlling the BDP100/BDP3 0 0 via the RS232 interface. e BDP100/300 implements
virtual IR commands in order to simplify the protocol. Any operation that can be invoked using the IR remote control can be achieved over RS232
using the Simulate RC5 IR command (0x08). See page 6 for details of this command. e RC5 IR code set is listed from page 9.
Conventions
All hexadecimal numbers begin 0x.
Any character in single quotes gives the ASCII equivalent of a hex value.
<n> represents an unknown or variable number.
1
5
6 9
1
5
6 9
DB9 Female
DB9 Female
e cable is wired as a null modem:
Connector 1 pin Connector 2 pin Function
2 3
Rx Tx
3 2
Tx Rx
5 5 RS232 Ground
Data transfer format
Transfer rate: 38,400bps.
1 start bit, 8 data bits, 1 stop bit, no parity, no ow control.
Serial Cable Specification
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