Siemens TC65 ユーザーズマニュアル

4 Software Platform

s

wm_java_usersguide_v12

Page 28 of 123

2008-02-25

Confidential / Released

In this chapter, we discuss the software architecture of the SMTK and the interfaces to it.

The SMTK enables a customer to develop a Java application on a PC and have it be execut-
able on the Java enabled module. The application is then loaded onto the module. The platform
comprises:
•

Java

TM

 Micro Edition (Java ME

TM

), which forms the base of the architecture.

The Java ME

TM 

is provided by SUN Microsystems, 

. It is specif-

ically designed for embedded systems and has a small memory footprint. The ME uses:
CLDC 1.1 HI, the connected limited device configuration hot spot implementation.
IMP-NG, the information module profile 2

nd

 generation, this is for the most part identical to

MIDP 2.0 but without the lcdui package. 

•

Additional Java virtual machine interfaces:
AT Command API
File I/O API
The data flow through these interfaces is shown in 

 and 

•

Memory space for Java programs:
Flash File System: around 1700k (1200k in XT75)
RAM: around 400k
Application code and data share the space in the flash file system and in RAM. 

•

Additional accessible periphery for Java applications
- A maximum of ten digital I/O pins usable, for example, as:

Output: status LEDs

- Input: Emergency Button
- One I2C/SPI Interface. 
- One Digital Analog Converter and two Analog Digital Converters. 
- Serial interface (RS-232 API): This standard serial interface could be used, for example,

with an external GPS device or a current meter.
For detailed information see