IntroEmbeddedJava
In Eng. & Sci
J2ME Overview
Real Time Java
Java Hardware
  Chips
  Cores
  Boards
Javelin Stamp
Javelin Programs   
   Demo 1   Listing
   Demo 2  
   Demo 3  
SNAP
   Demo 2  
Performance
Embed Apps
Exercises

In this chapter we look at Java for embedded applications in which a processor comes built into a device to perform specialized services. Embedded Java can refer to Java software running on a conventional microcontroller but it can also refer to hardware processors that directly execute Java bytecode. Some Java processors run standalone while others operate as co-processors that accelerate Java programs for a conventional primary processor.

Today Java is embedded in millions of consumer devices such as smart cards, wireless phones and PDAs. It will also increasingly be found in engineering and scientific devices such as sensors and industrial machines.

For example, Java networking capabilities can be used to provide access to mid and low level components of a complex industrial system or experimental apparatus. A server, such as discussed in Chapters 14 and 15, could provide status monitoring, diagnostics, data gathering, and calibration and other services to a client via a TCP/IP connection.

Outline

• Embedded Java in engineering and scientific applications.
  
  
• J2ME (Java 2 Micro Edition) - This is a big subject so we can only give a brief overview here.
  
  
• Real-Time Java - the challenges and solutions to using Java in applications where the time that a program runs and for how long it runs must be guaranteed within certain tolerances.
  
  
• Java Real Machines such as Java processors that execute bytecode instructions directly.
  • Java chips replace the JVM
  • Java cores available for FPGA and Systems-on-a-Chip.
  • Java boards include complete systems and plug-ins for insertion into sockets on carrier cards.
    
    
• More detailed discussions of two of the Java Processors:
  • Javelin Stamp
  • SNAP
    
    
• Java processor Programming :
  • Progrmming the Javelin Stamp
    • Demo 1: Javelin as a temperature sensor via serial port
    • Demo 2: Javelin provides location finding for a UAV with GPS and pressure gauge. It also obtains radiation readings from a Geiger counter.
  • Programmming the SNAP
    • Demo 3: Embedded Web Server
      
      
• Performance -do Java hardware processors provide significant gains over running a JVM on a conventional processor?
  
  
• Examples of other embedded applications with the hardware discussed here.
  
  
• Exercises