INfinity 510 Protocol Reference Guide - Sirit

Chapter 5 – Embedded Reader Applications
EMBEDDED READER APPLICATIONS
The INfinity 510 supports embedded user applications such as python
scripts or Java applications. These applications can be developed on an
external host and then loaded onto the reader. This section describes how
to load an embedded application.
DEVELOPING APPLICATION CODE
User Application Types Supported
The IDentity 5100 supports both Python and Java user applications. Python
applications may be either in script format (.py) or compiled (.pyc). Java
applications may either be class files (.class) or jar files (.jar).
The reader’s Python version is 2.4.2. The virtual machine for running
applications coded in Java is compatible with the J2SE specification. The
reader’s JRE (Java runtime) is version 1.4.2.
Directories Available for User Applications
Users may use both /tmp (stored in RAM) and /apps/bin (stored in
Flash) for their applications. Files and directories can be created and
written to in these directories. Users may not “cd” to these directories, so it
is advised that users use the fully qualified pathnames when referring to
files in these directories.
User applications may use up to 16MB of the RAM file system (/tmp). Files
stored in this file system are removed after a reboot. Other maintenance of
this file system is up to the user.
User applications can use up to 5.4MB of the Flash file system
(/apps/bin). These files are preserved over a reboot. Due to the limited
number of write cycles for a flash file system, users should avoid adding
files to the /apps/bin directory that are dynamically modified.
Registering for Reader Events
Events can also be registered by user applications. The Reader listens for
Event connections on its local port 50008. User applications can connect to
this port and will receive a channel id to use to register Events via the
reader.register_event() command.
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