April 2011
Intermediate to advanced
552 pages
12h 18m
English
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Chapter 10. Operating System Support Features
Overview of the OS Support Features
The Cortex-M0 processor includes a number of features that target the embedded operating system (OS). These include the following:
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A SysTick timer. This 24-bit down counter can be used to generate a SysTick exception at regular intervals.
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A second stack pointer called the process stack pointer. This feature allows the stack of the applications and the OS kernel to be separated.
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An SVC exception and SVC instruction. Applications use the SVC to access OS services via the exception mechanism.
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A PendSV exception. The PendSV can be used by an OS, device drivers, or the application to generate service requests that can be deferred.
This chapter describes each of these ...
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