Chapter 19

Using Embedded Operating Systems

Abstract

This chapter introduces the need for embedded OS in microcontroller applications, the role of CMSIS-RTOS and introduces the Keil® RTX kernel. This is then followed by detailed examples of using CMSIS-RTOS APIs with Keil RTX.

Keywords

RTOS; CMSIS; Mutex; semaphore; mail queue; message; signal; event; delay; timer

Chapter Outline

19.1 Introduction to embedded OSs

19.1.1 What are embedded OSs?

19.1.2 When to use an embedded OS

19.1.3 Role of CMSIS-RTOS

19.2 Keil™ RTX Real-Time Kernel

19.2.1 About RTX

19.2.2 Features overview

19.2.3 RTX and CMSIS-RTOS

19.2.4 Thread

19.3 CMSIS-OS examples

19.3.1 Simple CMSIS-RTOS with two threads

19.3.2 Inter-thread communciation overview

19.3.3 Signal event communication ...

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