There are varieties of embedded systems in the world. It is a big challenge to optimize the instruction sets of System on Chips (SoCs) according to different systems' working environments. The idea of programmable...There are varieties of embedded systems in the world. It is a big challenge to optimize the instruction sets of System on Chips (SoCs) according to different systems' working environments. The idea of programmable instruction set is an effective method to gain embedded system's re-configurability. This letter presents a logic module for Java processor to be capable of using programmable instruction set. Cost (area, power, and timing) of the module is trivial. Such module is also reusable for other embedded system solutions besides Java systems.展开更多
Java technology is spreading rapidly all over the world in recent years. It is a popular application development language for its well-encapsulation, platform-independent and high security. There are great amounts of ...Java technology is spreading rapidly all over the world in recent years. It is a popular application development language for its well-encapsulation, platform-independent and high security. There are great amounts of Java games and other gadgets on mobile platforms, as well as on set-up-box systems. As Java applications become more sophisticated, the Java Virtual Machine (JVM) mid-dle-wares in embedded systems are not satisfying, Java-specific chips extend in the market. All existing Java-based system software or Operating System (OS) are used on JVM, they cannot be used on Java processors. It is important to develop a pure Java system software or OS so that embedded systems using Java processors will have great performance in Java applications. This paper presents a set of system software designed for a Java-specified processor VP6K, which is also a System-on-Chip (SoC). This system software includes real-time multitask dispatching, file management, device management, hardware drivers, and infrastructural Application Programming Interface (APIs). According to ex-perimental results, the system software provides interfaces for Java programs to fully handle CPU resource, so that all applications can be executed properly and efficiently. VP6K embedded platform shows its good performance for Java applications when the system software is implemented.展开更多
FPGA具有灵活性高、设计周期短、成本低、风险小等优势,因此现已成为芯片设计的热点。该文设计了一种能在FP-GA芯片中实现的32位Java处理器JPOR(Java Processor Optimized For RTSJ)的数据通路,可以对实时Java规范提供有效支持。提供一...FPGA具有灵活性高、设计周期短、成本低、风险小等优势,因此现已成为芯片设计的热点。该文设计了一种能在FP-GA芯片中实现的32位Java处理器JPOR(Java Processor Optimized For RTSJ)的数据通路,可以对实时Java规范提供有效支持。提供一种嵌入式实时系统的Java平台,该处理器具有指令系统简洁,直接执行JAVA字节码,提供对线程调度和管理的硬件支持等优点。展开更多
基金Supported by the Guangzhou Key Technology R&D Program (No.2007Z2-D0011)
文摘There are varieties of embedded systems in the world. It is a big challenge to optimize the instruction sets of System on Chips (SoCs) according to different systems' working environments. The idea of programmable instruction set is an effective method to gain embedded system's re-configurability. This letter presents a logic module for Java processor to be capable of using programmable instruction set. Cost (area, power, and timing) of the module is trivial. Such module is also reusable for other embedded system solutions besides Java systems.
基金Supported by the Guangzhou Key Technology R&D Program (No. 2007Z2-D0011)
文摘Java technology is spreading rapidly all over the world in recent years. It is a popular application development language for its well-encapsulation, platform-independent and high security. There are great amounts of Java games and other gadgets on mobile platforms, as well as on set-up-box systems. As Java applications become more sophisticated, the Java Virtual Machine (JVM) mid-dle-wares in embedded systems are not satisfying, Java-specific chips extend in the market. All existing Java-based system software or Operating System (OS) are used on JVM, they cannot be used on Java processors. It is important to develop a pure Java system software or OS so that embedded systems using Java processors will have great performance in Java applications. This paper presents a set of system software designed for a Java-specified processor VP6K, which is also a System-on-Chip (SoC). This system software includes real-time multitask dispatching, file management, device management, hardware drivers, and infrastructural Application Programming Interface (APIs). According to ex-perimental results, the system software provides interfaces for Java programs to fully handle CPU resource, so that all applications can be executed properly and efficiently. VP6K embedded platform shows its good performance for Java applications when the system software is implemented.
文摘FPGA具有灵活性高、设计周期短、成本低、风险小等优势,因此现已成为芯片设计的热点。该文设计了一种能在FP-GA芯片中实现的32位Java处理器JPOR(Java Processor Optimized For RTSJ)的数据通路,可以对实时Java规范提供有效支持。提供一种嵌入式实时系统的Java平台,该处理器具有指令系统简洁,直接执行JAVA字节码,提供对线程调度和管理的硬件支持等优点。
