Книга: Real-Time Concepts for Embedded Systems

1.1.7 Cross-Platform Development

1.1.7 Cross-Platform Development

Another typical characteristic of embedded systems is its method of software development, called cross-platform development, for both system and application software. Software for an embedded system is developed on one platform but runs on another. In this context, the platform is the combination of hardware (such as particular type of processor), operating system, and software development tools used for further development.

The host system is the system on which the embedded software is developed. The target system is the embedded system under development.

The main software tool that makes cross-platform development possible is a cross compiler. A cross compiler is a compiler that runs on one type of processor architecture but produces object code for a different type of processor architecture. A cross compiler is used because the target system cannot host its own compiler. For example, the DIAB compiler from Wind River Systems is such a cross compiler. The DIAB compiler runs on the Microsoft Windows operating system (OS) on the IA-32 architecture and runs on various UNIX operating systems, such as the Solaris OS on the SPARC architecture. The compiler can produce object code for numerous processor types, such as Motorola’s 68000, MIPS, and ARM. We discuss more cross-development tools in Chapter 2.

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