May 2008

8083358 Rev C

1/14

User manual

OS21 for ARM

Introduction

The API defined in the OS21 User manual (ADCS 7358306) encapsulates the generic

facilities offered by OS21 on all target platforms. However each processor implements

certain features in different ways, and some processors offer facilities appropriate to their

own specific API.

ARM specific APIs can be accessed by a single #include:

#include <os21/arm.h>

This include file is automatically included from <os21.h> when __ARM__ is defined. The

ARM GCC compiler always defines __ARM__; therefore #include <arm.h> is normally

all that is necessary to include both the generic OS21 API and the ARM specific API.

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