Metrologic IS3480-00 User Manual download pdf (Page 55)

ScanVue5

Mini Kiosk

User Manual

M37574–01T

Industrial Electronic Engineers, Inc.

23-June-2008 Rev T Page 46

request: [ length ][ DIFF ][ filespec <NUL>][ YYYYMMDDhhmmss<NUL>]

response: [ length ][ DIFF ][ Bool ]

Bool value is TRUE if the file’s date/time are DIFFERENT than the

provided timestamp and FALSE if it is the same.

response: [ length ][ ERRR ]

Requested file does not exist or request is malformed.

Explanatory message is optional, should be string consisting of

number, whitespace, optional text.

[filespec] uses UNIX style forward–slash directory notation. It is the responsibility of the

server to convert the notation to the native method, and to guarantee that the path

cannot extend outside of the default directory.

The directory ‘/’ refers to the current directory; a leading ‘/’ is ignored. The QFX server

must guarantee the requested file is in or below its current directory.

Line–terminators are newline characters; carriage returns are optional.

The server is responsible to read text files and transmit them with appropriate line

breaks. Specifically, this applies to VAX/VMS.

Using Graphics Characters

ScanVue5

with an AMLCD can display graphics characters such as Kanji and Chinese

(ideograms) as well as standard Latin text characters. The graphics font file is

downloaded into the price verifier at boot up time by a command line in the scanvue.ini

file. As only one font file can be stored at a time, the characters displayed are limited to

those in the currently loaded font set. Certain font files contain other characters; for

example the Kanji font set also contains English, Greek and Cyrillic characters and GB

(simplified) Chinese includes 128 US-ASCII characters. Note: although standard US-

ASCII characters are single byte coded, using the US-ASCII characters in the GB

Chinese font file requires the double byte codes specified in that font file.

Displaying graphics characters requires two hex bytes (double-byte text) per character

due to the large number of glyphs in the font set (Kanji has 7,640 characters). The rules

for using double byte text are shown here.

Double byte text strings come in two types, Big-Endian and Little-Endian. The server

hardware determines if you will need big endian or little endian strings. Double byte

strings sent in trivial mode must be double NUL (00 00) terminated whereas strings sent

in nominal mode do not have to be.

Big-Endian text strings start with the bytes FE FF and end with the bytes 00 00.

Ex: FE FF b

10………..

00 00

Little-Endian text strings start with the bytes FF FE and end with the bytes 00 00

Ex: FF FE b

10………..

00 00

where b

-b

are a string of 5 double-byte character codes.

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Metrologic IS3480-00 User Manual Page 55

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