Cep Terminals GSM/GPRS TERMINAL CT63 JAVA 6203 ユーザーズマニュアル

4 Software Platform

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wm_java_usersguide_v19

Page 20 of 109

2012-01-27

Confidential / Released

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

The CMTK 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 1.7 MB (8 MB for TC65i-X and EGS5-X partitioned into 4 MB on
A:\ drive and 4 MB on C:\ drive. The C:\ drive is intended as a temporary storage when
updating the EGS5-X firmware over the air (FOTA)).
RAM: around 400kB (1.7 MB for TC65i-X and EGS5-X)
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 current meter.
For detailed information see 

.