Software Development Tools
REAL
TIME
OPERATING
SYSTEM
Overview
Freescale OSEKturbo OS is the leading
OSEK/VDX™ Real Time Operating System
(RTOS) implementation available on the market
today in terms of quality and performance.
OSEKturbo fully conforms to the latest
OSEK/VDX Operating System standard . The
1
emphasis in the design of OSEKturbo OS was to
meet demanding performance requirements, while
maintaining the outstanding reputation for stability
and quality (SEI CMM level 5
2
) established in
more than five years of automotive ECU
development. The result is that Freescale
OSEKturbo is one of most widely used
OSEK/VDX OS implementations on the market
today. Although the OSEK/VDX specification was
created by the automotive industry, the
specification does not limit its use to automotive
applications and it is increasingly being used in a
wide range of embedded applications ranging
from industrial control to telecom products.
Freescale’s 8- to 32-bit microcontrollers reducing
the number of tools that need to be re-learned for
new projects on different architectures. OSEK
System Generator (SysGen) is fully integrated in the
build process and for the configuration of project
settings. OSEK Builder can also be called as OSEK
configuration editor. CodeWarrior Development
Studio supports full OSEK OS kernel awareness
during debugging. CodeWarrior Development Studio
can also provide simulation support for development
without hardware.
In addition Freescale has established strong
partnerships with industry leaders providing
deeper integration with a wide variety of partner
tools including Model Based Simulation, Code
Generation, Schedulability Analysis, popular CAN-
based communications software and tools, and
support for many 3rd Party OSEK kernel aware
debuggers (emulators) and compilers.
OSEKturbo applications are written
in C language using the OSEK
Application Programming Interface
(API) enabling portability and re-
use of software.
Benefits
By adopting Freescale OSEKturbo
and CodeWarrior Development
Studio, embedded developers can:
> Reduce software integration time
and the associated costs
> Re-use software modules among
different application designs
> Reduce maintenance costs
through the use of a high-level
language and common platform
> Ensure a high-quality, stable
software environment for their
applications
> Ensure a highly efficient OS with
extremely small memory footprint
and outstanding performance
> Ensure an optimized, highly
integrated and broadly supported
development tool chain
RTOS is fully configurable and statically defined
within the CodeWarrior™ IDE environment. Only
those functions that are required are included
providing the user with a truly scaleable RTOS.
OSEKturbo OS is available for a wide range of 8-,
16- and 32-bit embedded microprocessors. The
Freescale OSEK tool support
Freescale offers a Builder tool for easy configuration
of OSEKturbo applications. The Freescale OSEK
Builder is a graphical Windows™ based application
that enables the developer to easily configure a
runtime system. The tool allows the developer to
optimize the software to meet the specific
application needs. A complete system description is
generated in OSEK Implementation Language (OIL)
format, allowing full portability of the application
configuration. The developer may also choose to
generate OS libraries from Builder.
Freescale also offers an OSEK plug-in to allow
kernel-aware debugging in CodeWarrior
Development Studio, enabling the developers to use
the CodeWarrior IDE for the whole application
development. It brings many advantages such as
simplified project setup through the use of
stationaries and samples. CodeWarrior tools support
1
OSEK/VDX Consortium (Offene Systeme und deren Schnittstellen für die Elektronik im Kraftfahrzeug/Vehicle
Distributed eXecutive) – for more information and for details on specification see: www.osek-vdx.org.
OSEKturbo Software development team has been assessed at Capability Maturity Model (CMM) level 5 by the
Software Engineering Institute (SEI) - for more information see: www.sei.cmu.edu/sei-home.html.
2
OSEK Real Time Operating System
OSEKturbo Performance Information
Context switch timings:
•
Measurements done with Timer capture (MPC555: TB, time base
register; HCS12DP256: TCNT, timer count register)
First instruction in
called task executed
ActivateTask is called
•
•
Tasks activated consecutively, ISR that activates tasks as well
19 tasks, 3 ISRs, STANDARD status
Ready to call first
instruction in previous task
Call Terminate Task
TASK 2
TASK 1
CONTEXT SWITCH
BETWEEN TASKS
OSEKturbo Performance
Information
Context switch between tasks (ActiveTask)
Terminate task with return to background task
Context switch from ISR (ActiveTask)
MPC555
40MHz; BCC1
1.7µs
0.9µs
2.1µs
HCS12DP256
8MHz; BCC1
12.5µs
6.6µs
14.9µs
OS code
Total OS RAM
TERMINATE
TASK TIME
Typical Memory Requirements:
MPC555
Total OS ROM
OS data
2304 bytes
108 bytes
2196 bytes
466 bytes
HCS12DP256
776 bytes
60 bytes
716 bytes
90 bytes
Freescale OSEKturbo OS Products
OSEKturbo releases exist for all OS (BCC1,
ECC1, BCC2, ECC2) and COM (CCCA and
CCCB) conformance classes.
Supported Processors (check with your local
Freescale sales office for latest list)
> Freescale 68HC08
> Freescale 68HC(S)12
> Freescale MPC5xx
> Freescale MPC5200
> Freescale DSP56800E
> Freescale S12X
> Freescale MPC55xx
> Freescale MAC7100
Technical Enhancements
> Timescale feature that enables cyclic task
activations based on efficient alarms
> OSEKturbo highly optimized for speed and
memory on each target
> ORTI (OSEK Runtime Interface) for kernel
aware debugging
> Enhanced OSEK Builder for OIL
configuration
> Multiple scheduling policies
> Event control for task synchronization
> Resource management based on OSEK
priority ceiling protocol
> Counter management
> Efficient alarm management
> Optimal stack methods
> Stack monitoring
> Fast links for accessing system data
structures
> Automatic exclusion of unused system
services
> Specific hardware features such as
memory bank switching and use of low
power modes, interrupt handler and
Floating Point registers
> Full internal OSEK communication for inter
process communication
> Task management for activation and
termination of tasks
> Interrupt management
> Error handling
Benchmark configuration:
> BCC1 with one task per priority
> Pre-emptive Scheduling
> No multiple activations
> 10 basic tasks + 1 initialization task
> 10 alarms with task activations
> 1 16-bit (1 ms)
> 1 ISR (in addition to system timer)
> No messages, no resources
> Standard status, debug level zero
> No hooks
Learn More:
For more information about Freescale products, please visit
www.freescale.com/codewarrior
FREESCALE and the FREESCALE logo are trademarks of Freescale Semiconductor, Inc. CODEWARRIOR and
the CODEWARRIOR logo are trademarks of Metrowerks Corp. All other product or service names are the
property of their respective owners.
© Freescale Semiconductor, Inc. 2005. © Metrowerks Corp. 2005. Metrowerks is a Freescale company.
ALL RIGHTS RESERVED.
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