Chapter 9

Embedded Operating Systems

In This Chapter

• Defining OS

• Discussing process management, scheduling, and intertask communication

• Introducing memory management at the OS level

• Discussing I/O management in OSs

An operating system (OS) is an optional part of an embedded device’s system software stack, meaning that not all embedded systems have one. OSs can be used on any processor (Instruction Set Architecture (ISA)) to which the OS has been ported. As shown in Figure 9-1, an OS either sits over the hardware, over the device driver layer, or over a BSP (Board Support Package, which will be discussed in Section 9.7).

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Figure 9-1 OSs and ...

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