Symbol SE 923, Integration Manual

Page: 171 / 238

6-15
Simple Serial Interface
DECODE_DATA
Description: Decode data in SSI packet format
Packet Format
Field Descriptions
This Opcode is used by the decoder when packeted data is selected to send decoded bar code
data to the host. The decoded message is contained in the Decode Data field.
Length Opcode
Message
Source
Status
Bar code
Type
Decode
Data
Checksum
0xF3 0x00
Field Name Format Size Description
Length Length of message (not
including checksum). 1 Byte Length Field
Opcode 0xF3 1 Byte Identifies this Opcode type.
Message Source 0 = Decoder 1 Byte Identifies where the message is
coming from.
Status Bit 0: Retransmit
Bits 1-7: unused 1 Byte Identifies the transmission status.
Unused bits must be set to 0.
Bar Code Type See Table 6-6 1 Byte Identifies the scanned data code
type.
Decode Data <data> Variable Data is decoded data including
prefix and suffix sent in ASCII
format.
Checksum 2's complement sum of
message contents
excluding checksum. 2 Bytes Checksum of message.