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Introduction
Finally, μC/OS-III allows for better use of the CPU by providing approximately 70
indispensable services. After designing a system using a real-time kernel such as μC/OS-III,
you will not return to designing a foreground/background system.
1-3 RTOS (REAL-TIME OPERATING SYSTEM)
A Real Time Operating System generally contains a real-time kernel and other higher-level
services such as file management, protocol stacks, a Graphical User Interface (GUI), and
other components. Most additional services revolve around I/O devices.
Micriμm offers a complete suite of RTOS components including: μC/FS (an Embedded File
System), μC/TCP-IP (a TCP/IP stack), μC/GUI (a Graphical User Interface), μC/USB (a USB
device, host and OTG stack), and more. Most of these components are designed to work
standalone. Except for μC/TCP-IP, a real-time kernel is not required to use the components
in an application. In fact, users can pick and choose only the components required for the
application. Contact Micriμm (www.micrium.com) for additional details and pricing.
1-4 μC/OS-III
μC/OS-III is a scalable, ROMable, preemptive real-time kernel that manages an unlimited
number of tasks. μC/OS-III is a third-generation kernel, offering all of the services expected
from a modern real-time kernel including resource management, synchronization, inter-task
communication, and more. However, μC/OS-III also offers many unique features not found
in other real-time kernels, such as the ability to perform performance measurements at run
time, directly signal or send messages to tasks, and pending (i.e., waiting) on such multiple
kernel objects as semaphores and message queues.
Here is a list of features provided by μC/OS-III:
Source Code: μC/OS-III is provided in ANSI-C source form to licensees. The source code
for μC/OS-III is arguably the cleanest and most consistent kernel code available. Clean
source is part of the corporate culture at Micriμm. Although many commercial kernel
vendors provide source code for their products, unless the code follows strict coding
standards and is accompanied by complete documentation with examples to show how the
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