Motorola SE3300, Руководство по интеграции

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Control Interface 5 - 5
Command Descriptions
See Table 5-3 on page 5-10 for command and response formats for all SE3300 commands.
ACQUISITION 0x58
ACQUISITION Start causes the SE3300 to output image data on the camera interface. ACQUISITION Stop
stops the image data output.
After receiving the Stop command, the SE3300 may not respond to subsequent commands for up to one frame
time (16.6 ms at 60 fps) because the system requires the current frame to complete before the engine
processes new commands. Issuing commands during this time results in unacknowledged I
2
C commands,
requiring command retries.
ACQUISITION_MODE 0x5B
Optimizes the engine’s behavior for bar code decoding, image capture, motion detection, or aiming pattern
capture.
AIM 0x55
Turns the aiming pattern on and off. AIM only turns aiming on if acquisition is started. Setting AIM On while
acquisition is stopped does not turn aiming on, although it turns aiming on upon the next ACQUISITION Start
command.
AIM_BLINK_RATE 0xF4
Controls the blink rate of the aiming pattern. The aiming pattern only blinks when AIM is enabled. The default is
Always On.
This command takes two parameters:
•
Byte 1 = Number of frames the aiming pattern remains on; 0 = Always On
•
Byte 2 = Number of frames the aiming pattern is off.
Blink rate/times depend on the frame rate, for example:
•
At 60 fps, to blink at 1/3 seconds on and 2/3 seconds off, set Byte 1 to 20 and Byte 2 to 40.
•
At 30 fps, to blink at 1/3 seconds on and 2/3 seconds off, set Byte 1 to 10 and Byte 2 to 20.
AIM_DURING_EXPOSURE 0x56
When enabled, this keeps the aiming pattern on when capturing an image, meaning the pattern is visible in the
image. When disabled, the aiming pattern is not visible in acquired images. The default is disabled.
Enabling AIM_DURING_EXPOSURE has no effect unless AIM is also on. Enabling
AIM_DURING_EXPOSURE while acquisition is stopped does not turn aiming on, although it turns aiming on
upon the next ACQUISITION Start command.
NOTE When using Picklist Mode, AIM_BLINK_RATE must remain at its default.