Motorola SE955 Integration Manual page 200

CUSTOM_DEFAULTS
Description - Write or Restore Values to Custom Defaults
Packet Format
Length Opcode
0x05 0x12
Field Descriptions
Field
Length Length of message (not including
checksum)
Opcode 0x12
Message Source 4 = Host
Status Bit 0 : Retransmit
Bit 1 - 7: unused
Action 0 = Write to Custom Defaults
1 = Restore Custom Defaults
Checksum 2's complement sum of message
contents excluding checksum
Host Requirements
The host sends this command to program or restore the product's custom default values.
Decoder Requirements
If supported by the scanner, upon receiving the command Write to Custom Defaults, the scanner writes the
current parameter settings to the custom defaults buffer. The Restore to Custom Defaults command restores
the previously stored custom default buffer. CMD_ACK / CMD_NAK is transmitted if handshaking is enabled.
If the restore action is requested, reset all default parameters as follows:
•
If custom defaults were set by sending Write to Custom Defaults, send Restore Custom Defaults to
retrieve and restore the scan engine custom default settings.
NOTE Only parameter values that were entered by scanning or permanently stored are saved to custom
defaults. Temporary stored parameter values are discarded. For information on temporary stored
parameters, see
•
If no custom defaults were set, send Restore Custom Defaults to restore the factory default values.
NOTE If user defined custom defaults were set and the scan engine needs to be reset to factory default values,
send PARAM_DEFAULTS
Sample Packet to Write to Custom Defaults
05 12 04 00 00 FF E5
Message Source
0x04
Format
Decoder Requirements on page 10-24
(see page 10-20).
Simple Serial Interface 10 - 13
Status Action
Size Description
1 Byte Length Field
1 Byte Identifies this opcode type.
1 Byte Identifies where the message is coming
from.
1 Byte Identifies the transmission status.
All unused bits must be set to 0.
1 Byte Identifies the operation to perform on the
custom defaults buffer.
2 Byte Checksum of message.
and Serial Response Time-out on page
Checksum
10-36.