JAVA-BASED REAL-TIME PROGRAMMING

4. Exercises and Labs
4.3 Lab 1 – Alarmclock
In this lab you are going to implement your alarm clock system designed in
the previous exercise. The target system is an AVR board equipped with LCD
display and six buttons. You will develop the software in three steps:
• Implementing the alarm clock in Java using semaphores, executing it on
a Java emulator
• Compile the Java code to C and execute on a PC simulator
• Cross-compile to the AVR board and execute on the actual hardware
Java is the choice language in the course, but really small embedded systems
may not have the resources for executing Java directly. This is the case here.
However, almost all small system are capable of executing C code, so therefore
we translate the code to C through a tool and compile it, first towards PC
and linux for testing, and then towards the real hardware.
Note: in the 2012 edition of the course in Lund, the AVR board will not be
available (the hardware is broken). Therefore only the two first items should
be done.
Note: in the Helsingborg RT course, only the first item should be done,
since the Java2C-translator will not be available.
Preparation
It is generally a good idea to start programming before the lab occasion.
The handout code is available on the course homepage as a zipped Eclipse
workspace. Remember that the emulator should be run as an applet.
108 2012-08-29 16:05