Chapter 4 Scanner; Introduction; Barcode Processing Overview - LXE VX3X Reference Manual

Introduction

Access:
Set scanner keyboard wedge parameters, enable or disable symbologies from being scanned,
scanner icon appearance, active scanner port, and scan key settings. Assign baud rate, parity, stop
bits and data bits for available COM ports.

Barcode Processing Overview

Note:
The complete sequence of barcode processing is as follows:
1 Scanned barcode is tested for a code ID and matching length (Min/Max). If it matches, it is
processed per the rules in place for that symbology. If the scan does not meet the criteria for
that symbology, it will be processed based on the settings for All. If a code ID is not found,
the barcode data will be processed based on the settings for All.
2 If symbology is disabled, the scan is rejected.
3 Strip leading data bytes unconditionally.
4 Strip trailing data bytes unconditionally.
5 Parse for, and strip if found, Barcode Data strings.
6 Replace any control characters with string, as configured.
7 Add prefix string to output buffer.
8 If Code ID is *not* stripped, add saved code ID from above to output buffer.
9 Add processed barcode string from above to output buffer.
10 Add suffix string to output buffer.
11 Add a terminating NUL to the output buffer, in case the data is processed as a string.
12 If key output is enabled, start the process to output keys. If control characters are
encountered:
The data is ready to be read by applications.
See "Barcode Processing Examples" at the end of the "Barcode Manipulation" section.
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Chapter 4 Scanner

Start | Settings | Control Panel | Scanner
Steps 1-6 describe the barcode manipulation. Steps 7-11 describe how the manipulated
data is built. Step 12 describes how the manipulated data is output.
• If Translate All is set, key is translated to CTRL + char, and output.
• If Translate All is not set, and key has a valid VK code, key is output.
• Otherwise, key is ignored (not output).
VX3X Reference Guide