Samsung FP-T5084 Owner's Instructions Manual page 104

1 bit
Response Packet Structure [3 Bytesl' '
i f ,
• Success • Fail
I OX031 OxOC
I
OxF1
I
I
OX031 OxOC I OxFF I
When the received packet from an external device has a valid
value, a Success packet is sent. Otherwise, a Fail packet is sent.
A Fail packet is sent if:
• The received packet length is not equal to 7 bytes.
• The 2 byte packet header value is not equal to Ox08, 0x22.
• The check sum is incorrect.
Failure detection by an external device
An external device classifies the packet as Fail if it does not receive
a Success packet within 100ms.
PC
[
.
: ,
i • .
ij . . . . .
,'i
, ,
8 bits
RS-232C
None
9600 bps
None
the PDP DTV using the serial port.
ommunication Protocol
nication Sequence
Command Packet Structure
[7byteg"
ort Settings (Select Standard RS232)
• PC
Creates a command packet and sends it through RS232C.
• PDP DTV
Receives a packet and parses the packet.
Determines whether it is a success or fail, and transmits the Ack packet to the PC.
Controls the PDP DTV with the parsed command.
• PC
Waits for the Ack packet.
Prepares the next command, if a Success packet arrives immediately.
I O X O s I O X 2 2 _ CS I
• A command packet consists of 7 bytes in total.
• The two bytes Ox08 and Ox22 signify that the packet is for serial communication.
• The following 4 bytes represent apre-defined command that can be defined by the user.
• The last byte is the checksum which checks the validity of the current packet.
Header [2 Byte): Pre·defined values fixed to Ox08 and Ox22.
Cmd1 [1 Byte): The first value of the code defined in the command list (Hexadecimal)
Cmd2 [1 Byte): The second value of the code defined in the command list (Hexadecimal)
Cmd3 [1 Byte): The third value of the code defined in the command list (Hexadecimal)
Value [1 Byte): Input parameter for the command
(Defau~:
0) (Hexadecimal)
CS [1 Byte): Checksum (the 2's complement of the sum of all the values except for the CS value.)
r----------------------------------------------------------------------------,
, ,
:
L. ..J
1 bit
Response Packet Structure [3 Bytesl' '
i f ,
• Success • Fail
I OX031 OxOC
I
OxF1
I
I
OX031 OxOC I OxFF I
When the received packet from an external device has a valid
value, a Success packet is sent. Otherwise, a Fail packet is sent.
A Fail packet is sent if:
• The received packet length is not equal to 7 bytes.
• The 2 byte packet header value is not equal to Ox08, 0x22.
• The check sum is incorrect.
Failure detection by an external device
An external device classifies the packet as Fail if it does not receive
a Success packet within 100ms.
PC
[
.
: ,
i • .
ij . . . . .
,'i
, ,
8 bits
RS-232C
None
9600 bps
None
the PDP DTV using the serial port.
ommunication Protocol
nication Sequence
Command Packet Structure
[7byteg"
ort Settings (Select Standard RS232)
• PC
Creates a command packet and sends it through RS232C.
• PDP DTV
Receives a packet and parses the packet.
Determines whether it is a success or fail, and transmits the Ack packet to the PC.
Controls the PDP DTV with the parsed command.
• PC
Waits for the Ack packet.
Prepares the next command, if a Success packet arrives immediately.
I O X O s I O X 2 2 _ CS I
• A command packet consists of 7 bytes in total.
• The two bytes Ox08 and Ox22 signify that the packet is for serial communication.
• The following 4 bytes represent apre-defined command that can be defined by the user.
• The last byte is the checksum which checks the validity of the current packet.
Header [2 Byte): Pre·defined values fixed to Ox08 and Ox22.
Cmd1 [1 Byte): The first value of the code defined in the command list (Hexadecimal)
Cmd2 [1 Byte): The second value of the code defined in the command list (Hexadecimal)
Cmd3 [1 Byte): The third value of the code defined in the command list (Hexadecimal)
Value [1 Byte): Input parameter for the command
(Defau~:
0) (Hexadecimal)
CS [1 Byte): Checksum (the 2's complement of the sum of all the values except for the CS value.)
r----------------------------------------------------------------------------,
, ,
:
L. ..J