Motorola MS4404 用户手册
8 - 2
Symbol MS4404/MS4407 Integration Guide
lists all the SSI Opcodes supported by the decoder. It identifies the SSI partner allowed to send a
message of each type. The host transmits Opcodes designated type H. The decoder transmits type D Opcodes,
and either partner can transmit Host/Decoder (H/D) types.
and either partner can transmit Host/Decoder (H/D) types.
The details of the SSI protocol can be found in the Simple Serial Interface Programmer's Guide (72-40451-xx).
Table 8-1
SSI Commands
Name
Type
Opcode
Description
AIM_OFF
H
0xC4
Deactivate aim pattern.
AIM_ON
H
0xC5
Activate aim pattern.
BEEP
H
0xE6
Sound the beeper.
CAPABILITIES_REPLY
D
0xD4
Reply to CAPABILITIES_REQUEST; contains a list of the
capabilities and commands supported by the decoder.
capabilities and commands supported by the decoder.
CAPABILITIES_REQUEST
H
0xD3
Request capabilities report from the decoder.
CMD_ACK
H/D
0xD0
Positive acknowledgment of received packet.
CMD_NAK
H/D
0xD1
Negative acknowledgment of received packet.
DECODE_DATA
D
0xF3
Decode data in SSI packet format.
EVENT
D
0xF6
Event indicated by associated event code.
LED_OFF
H
0xE8
De-activate LED output.
LED_ON
H
0xE7
Activate LED output.
PARAM_DEFAULTS
H
0xC8
Set parameter default values.
PARAM_REQUEST
H
0xC7
Request values of certain parameters.
PARAM_SEND
H/D
0xC6
Send parameter values.
REPLY_ID
D
0xA6
Reply to REQUEST_ID; contains decoder's serial number.
REPLY_REVISION
D
0xA4
Reply to REQ_REV contains decoder's software/hardware
configuration.
configuration.
REQUEST_REVISION
H
0xA3
Request the decoder's configuration.
SCAN_DISABLE H
0xEA
Prevent the operator from scanning bar codes.
SCAN_ENABLE
H
0xE9
Permit bar code scanning.
SLEEP
H
0xEB
Request to place the decoder into low power.
START_DECODE
H
0xE4
Tell decoder to attempt to decode a bar code.
STOP_DECODE
H
0xE5
Tell decoder to abort a decode attempt.
WAKEUP
H
N/A
Wakeup decoder after it has entered low power mode.