<s>
Nucleus	B-Operating_System
RTOS	I-Operating_System
is	O
a	O
real-time	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
(	O
RTOS	B-Operating_System
)	O
produced	O
by	O
the	O
Embedded	O
Software	O
Division	O
of	O
Mentor	O
Graphics	O
,	O
a	O
Siemens	O
Business	O
,	O
supporting	O
32	O
-	O
and	O
64-bit	B-Device
embedded	B-Architecture
system	I-Architecture
platforms	O
.	O
</s>
<s>
The	O
operating	B-General_Concept
system	I-General_Concept
(	O
OS	O
)	O
is	O
designed	O
for	O
real-time	B-General_Concept
embedded	B-Architecture
systems	I-Architecture
for	O
medical	O
,	O
industrial	O
,	O
consumer	O
,	O
aerospace	O
,	O
and	O
Internet	B-Operating_System
of	I-Operating_System
things	I-Operating_System
(	O
IoT	B-Operating_System
)	O
uses	O
.	O
</s>
<s>
Nucleus	B-Operating_System
was	O
released	O
first	O
in	O
1993	O
.	O
</s>
<s>
The	O
latest	O
version	O
is	O
3.x	O
,	O
and	O
includes	O
features	O
such	O
as	O
power	O
management	O
,	O
process	O
model	O
,	O
64-bit	B-Device
support	I-Device
,	O
safety	O
certification	O
,	O
and	O
support	O
for	O
heterogeneous	O
computing	O
multi-core	B-Architecture
system	B-Architecture
on	I-Architecture
a	I-Architecture
chip	I-Architecture
(	O
SOCs	O
)	O
processors	O
.	O
</s>
<s>
Nucleus	B-Operating_System
process	O
model	O
adds	O
space	O
domain	O
partitioning	O
for	O
task	O
and	O
module	O
isolation	O
on	O
SOCs	O
with	O
either	O
a	O
memory	B-General_Concept
management	I-General_Concept
unit	I-General_Concept
(	O
MMU	O
)	O
or	O
memory	B-General_Concept
protection	I-General_Concept
unit	I-General_Concept
(	O
MPU	O
)	O
,	O
such	O
as	O
those	O
based	O
on	O
ARMv7/8	O
Cortex-A/R/M	O
cores	O
.	O
</s>
<s>
Nucleus	B-Operating_System
supports	O
many	O
embedded	B-Architecture
processors	I-Architecture
including	O
leading	O
ARMv7	O
Cortex	O
A	O
,	O
R	O
,	O
and	O
M	O
devices	O
.	O
</s>
<s>
Recent	O
releases	O
support	O
ARMv8	O
64-bit	B-Device
devices	O
.	O
</s>
<s>
It	O
includes	O
32-bit	O
MCUs	O
and	O
MPUs	O
,	O
configurable	O
devices	O
,	O
and	O
32-bit	O
and	O
64-bit	B-Device
multi-core	B-Architecture
processors	I-Architecture
.	O
</s>
<s>
Nucleus	B-Operating_System
1.x	O
was	O
released	O
first	O
in	O
1993	O
by	O
Accelerated	O
Technology	O
(	O
ATI	O
)	O
as	O
Nucleus	B-Operating_System
PLUS	I-Operating_System
.	O
</s>
<s>
Following	O
its	O
early	O
success	O
there	O
,	O
ATI	O
added	O
support	O
for	O
networking	B-Architecture
,	O
graphics	O
,	O
and	O
file	B-Application
systems	I-Application
,	O
which	O
accelerated	O
adoption	O
.	O
</s>
<s>
Mentor	O
Graphics	O
acquired	O
ATI	O
in	O
March	O
2002	O
,	O
which	O
was	O
soon	O
followed	O
by	O
the	O
second	O
generation	O
of	O
Nucleus	B-Operating_System
RTOS	I-Operating_System
.	O
</s>
<s>
New	O
components	O
like	O
IPv6	B-Protocol
,	O
Flash	B-Device
memory	I-Device
file	B-Application
system	I-Application
and	O
Universal	O
Serial	O
Bus	O
(	O
USB	B-Protocol
)	O
2.0	O
were	O
added	O
.	O
</s>
<s>
Mentor	O
replaced	O
the	O
legacy	O
Codelab	O
debugger	B-Application
with	O
EDGE	O
development	O
tools	O
which	O
included	O
compiler	B-Language
tools	O
,	O
debugger	B-Application
,	O
simulator	O
,	O
and	O
profiler	O
.	O
</s>
<s>
Mentor	O
Graphics	O
introduced	O
the	O
3rd	O
generation	O
Nucleus	B-Operating_System
in	O
2010	O
.	O
</s>
<s>
Version	O
3.x	O
was	O
intended	O
for	O
both	O
high-end	O
microprocessor	B-Architecture
units	I-Architecture
(	O
MPUs	O
)	O
,	O
microcontroller	B-Architecture
units	I-Architecture
(	O
MCUs	O
)	O
,	O
digital	B-Architecture
signal	I-Architecture
processors	I-Architecture
(	O
DSPs	O
)	O
,	O
and	O
field-programmable	B-Architecture
gate	I-Architecture
arrays	I-Architecture
(	O
FPGAs	B-Architecture
)	O
.	O
</s>
<s>
For	O
devices	O
with	O
limited	O
memory	O
resources	O
,	O
Nucleus	B-Operating_System
was	O
designed	O
to	O
scale	O
down	O
to	O
a	O
memory	O
size	O
of	O
<	O
10	O
kilobytes	O
(	O
KBs	O
)	O
for	O
both	O
code	O
and	O
data	O
.	O
</s>
<s>
Nucleus	B-Operating_System
3.x	O
introduced	O
support	O
for	O
symmetric	B-Operating_System
multiprocessing	I-Operating_System
(	O
SMP	O
)	O
and	O
asymmetric	B-Operating_System
multiprocessing	I-Operating_System
(	O
AMP	O
)	O
both	O
unsupervised	O
uAMP	O
and	O
supervised	O
sAMP	O
(	O
using	O
Mentor	O
Embedded	B-Operating_System
Hypervisor	I-Operating_System
)	O
.	O
</s>
<s>
Other	O
additions	O
in	O
Nucleus	B-Operating_System
3.x	O
:	O
</s>
<s>
Integrated	O
power	O
management	O
support	O
for	O
kernel	B-Operating_System
and	O
middleware	B-General_Concept
components	O
;	O
includes	O
support	O
for	O
DVFS	O
,	O
tick	O
suppression	O
,	O
and	O
sleep	O
modes	O
including	O
hibernation	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
new	O
features	O
in	O
version	O
3.x	O
,	O
Nucleus	B-Operating_System
moved	O
business	O
model	O
from	O
a	O
la	O
carte	O
,	O
to	O
one	O
unified	O
package	O
.	O
</s>
<s>
Sourcery	O
CodeBench	O
comprises	O
a	O
compiler	B-Language
tool-chain	O
,	O
debugger	B-Application
,	O
and	O
trace	O
analysis	O
tools	O
.	O
</s>
<s>
The	O
compiler	B-Language
tool-chain	O
is	O
based	O
on	O
GNU	O
tool-chain	O
.	O
</s>
<s>
The	O
debugger	B-Application
and	O
integrated	B-Application
development	I-Application
environment	I-Application
(	O
IDE	O
)	O
are	O
based	O
on	O
Eclipse	B-Application
.	O
</s>
<s>
Sourcery	O
CodeBench	O
supports	O
ARM	B-Architecture
,	O
IA-32	B-Device
,	O
MIPS	B-Device
,	O
and	O
PPC	O
architectures	O
with	O
built-in	O
workflows	O
and	O
OS	O
awareness	O
for	O
Nucleus	B-Operating_System
RTOS	I-Operating_System
and	O
Mentor	O
Embedded	O
Linux	O
.	O
</s>
<s>
Nucleus	B-Operating_System
3.x	O
introduced	O
a	O
unified	O
build	O
and	O
configuration	O
system	O
with	O
which	O
the	O
Kernel	B-Operating_System
is	O
configured	O
through	O
a	O
single	O
file	O
and	O
builds	O
as	O
a	O
single	O
library	O
.	O
</s>
<s>
Like	O
menuconfig	B-Application
in	O
Linux	O
,	O
a	O
user	B-Application
interface	I-Application
(	O
UI	O
)	O
based	O
configuration	O
tool	O
integrated	O
with	O
CodeBench	O
provides	O
the	O
user	O
with	O
graphically	O
selectable	O
components	O
to	O
customize	O
the	O
kernel	B-Operating_System
at	O
build	O
time	O
.	O
</s>
<s>
The	O
Nucleus	B-Operating_System
configuration	O
system	O
allows	O
for	O
user	O
customization	O
to	O
integrate	O
new	O
tool-chains	O
,	O
architecture	O
support	O
and	O
build	O
properties	O
.	O
</s>
<s>
Nucleus	B-Operating_System
RTOS	I-Operating_System
components	O
include	O
:	O
</s>
<s>
Nucleus	B-Operating_System
supports	O
the	O
ability	O
to	O
connect	O
to	O
other	O
devices	O
through	O
various	O
interfaces	O
including	O
:	O
</s>
<s>
Bluetooth	B-Protocol
with	O
many	O
advanced	O
profiles	O
enabled	O
(	O
A2DP	O
,	O
AVRCP	O
,	O
HFP	O
,	O
HSP	O
,	O
etc	O
.	O
)	O
</s>
<s>
Unlike	O
Windows	O
and	O
Unix-like	O
operating	B-General_Concept
systems	I-General_Concept
,	O
Nucleus	B-Operating_System
does	O
not	O
need	O
a	O
file	B-Application
system	I-Application
to	O
work	O
.	O
</s>
<s>
However	O
,	O
for	O
complex	O
uses	O
needing	O
local	O
storage	O
,	O
Nucleus	B-Operating_System
supports	O
several	O
file	B-Application
systems	I-Application
including	O
FAT	B-Application
,	O
SAFE	O
(	O
fault	O
tolerant	O
)	O
,	O
and	O
LWEXT	O
.	O
</s>
<s>
Nucleus	B-Operating_System
provides	O
support	O
for	O
different	O
file	B-Application
systems	I-Application
and	O
storage	O
media	O
through	O
a	O
virtual	O
file	B-Application
system	I-Application
application	B-Application
programming	I-Application
interface	I-Application
(	O
API	B-Application
)	O
that	O
allows	O
access	O
to	O
the	O
supported	O
file	B-Application
systems	I-Application
and	O
storage	O
devices	O
using	O
the	O
same	O
functions	O
calls	O
regardless	O
of	O
the	O
underlying	O
storage	O
format	O
.	O
</s>
<s>
The	O
Nucleus	B-Operating_System
networking	B-Architecture
stack	O
is	O
a	O
dual	O
IPv4	O
and	O
IPv6	B-Protocol
stack	O
that	O
supports	O
over	O
60	O
networking	B-Architecture
protocols	O
.	O
</s>
<s>
Nucleus	B-Operating_System
networking	B-Architecture
stack	O
supports	O
POSIX	O
and	O
provides	O
an	O
easy	O
to	O
use	O
socket	O
based	O
application	O
interface	O
.	O
</s>
<s>
Nucleus	B-Operating_System
supports	O
a	O
wide	O
variety	O
of	O
encryption	O
options	O
for	O
secure	O
communications	O
to	O
protect	O
data	O
at	O
rest	O
or	O
in	O
transit	O
.	O
</s>
<s>
Nucleus	B-Operating_System
ships	O
with	O
OpenSSL	O
and	O
an	O
OpenSSL-like	O
package	O
wolfSSL	B-Protocol
(	O
formerly	O
CyaSSL	B-Protocol
)	O
that	O
is	O
far	O
smaller	O
than	O
OpenSSL	O
for	O
designs	O
needing	O
encryption	O
but	O
limited	O
in	O
memory	O
capacity	O
.	O
</s>
<s>
Security	O
protocols	O
to	O
protect	O
data	O
in	O
transit	O
include	O
IPsec/IKE	O
,	O
SSH/SSL/TLS/DTLS	O
.	O
</s>
<s>
Public-key	B-Application
cryptography	I-Application
algorithms	O
include	O
RSA	O
.	O
</s>
<s>
Nucleus	B-Operating_System
3.x	O
supports	O
OpenGL	B-Application
and	O
leading	O
3rd	O
party	O
UI	O
libraries	O
.	O
</s>
<s>
Nucleus	B-Operating_System
supports	O
the	O
Qt	B-Language
UI	O
framework	O
which	O
has	O
been	O
optimized	O
for	O
code	O
size	O
and	O
integrated	O
into	O
CodeBench	O
for	O
debugging	O
and	O
tracing	O
.	O
</s>
<s>
Other	O
UIs	O
supported	O
include	O
Embedded	B-Operating_System
Wizard	I-Operating_System
and	O
Socionext	O
CGI	O
Studio	O
.	O
</s>
<s>
Recent	O
releases	O
of	O
Nucleus	B-Operating_System
include	O
support	O
for	O
HTTPS	B-Protocol
,	O
Constrained	B-Device
Application	I-Device
Protocol	I-Device
(	O
CoAP	B-Device
)	O
,	O
MQTT	B-Application
and	O
6LoWPAN	B-Protocol
.	O
</s>
<s>
Nucleus	B-Operating_System
has	O
also	O
announced	O
support	O
for	O
Microsoft	O
Azure	O
cloud	O
computing	O
framework	O
.	O
</s>
<s>
Nucleus	B-Operating_System
has	O
been	O
integrated	O
with	O
3rd	O
party	O
industrial	O
stacks	O
from	O
industry	O
leaders	O
.	O
</s>
<s>
Industrial	O
stack	O
support	O
includes	O
OPC	O
Unified	O
Architecture	O
(	O
OPC	O
UA	O
)	O
host	O
and	O
client	O
and	O
EtherNet/IP	B-Protocol
from	O
and	O
EtherCAT	B-Protocol
from	O
.	O
</s>
<s>
Nucleus	B-Operating_System
supports	O
asymmetric	B-Operating_System
multiprocessing	I-Operating_System
(	O
AMP	O
)	O
mode	O
and	O
symmetric	B-Operating_System
multiprocessing	I-Operating_System
(	O
SMP	O
)	O
mode	O
for	O
leading	O
32	O
and	O
64-bit	B-Device
heterogeneous	O
multi-core	B-Architecture
SoCs	O
.	O
</s>
<s>
Nucleus	B-Operating_System
is	O
also	O
capable	O
of	O
running	O
as	O
a	O
GOS	O
with	O
Mentor	O
Embedded	B-Operating_System
Hypervisor	I-Operating_System
.	O
</s>
<s>
When	O
operating	O
in	O
AMP	O
mode	O
,	O
Nucleus	B-Operating_System
RTOS	I-Operating_System
can	O
coexist	O
with	O
other	O
instances	O
of	O
Nucleus	B-Operating_System
,	O
Linux	O
,	O
and/or	O
bare	O
machine	O
(	O
metal	O
)	O
programs	O
distributed	O
on	O
the	O
other	O
processors	O
.	O
</s>
<s>
Mentor	O
Embedded	O
Multicore	B-Architecture
Framework	O
provides	O
interprocess	O
communication	O
between	O
operating	B-General_Concept
systems	I-General_Concept
on	O
the	O
various	O
cores	O
,	O
and	O
processor	O
life	O
cycle	O
management	O
.	O
</s>
<s>
SMP	O
operation	O
entails	O
having	O
a	O
instantiation	O
of	O
Nucleus	B-Operating_System
RTOS	I-Operating_System
manage	O
multiple	O
cores	O
simultaneously	O
.	O
</s>
<s>
Nucleus	B-Operating_System
can	O
distribute	O
its	O
operations	O
across	O
all	O
cores	O
on	O
a	O
multi-core	B-Architecture
device	O
,	O
or	O
any	O
subset	O
of	O
cores	O
.	O
</s>
<s>
For	O
this	O
purpose	O
Nucleus	B-Operating_System
offers	O
runtime	B-Library
API	B-Application
support	O
for	O
bound	O
computation	O
domain	O
,	O
and	O
control	O
tasks	O
and	O
interrupt	O
affinities	O
for	O
core	O
assignment	O
.	O
</s>
<s>
Nucleus	B-Operating_System
RTOS	I-Operating_System
is	O
packaged	O
as	O
follows	O
:	O
</s>
<s>
Nucleus	B-Operating_System
ReadyStart	O
Edition	O
ReadyStart	O
which	O
includes	O
the	O
runtime	B-Device
system	I-Device
,	O
middleware	B-General_Concept
,	O
BSP	O
(	O
all	O
in	O
source	O
code	O
)	O
and	O
the	O
IDE	O
,	O
debugger	B-Application
,	O
compiling	B-Language
tools	I-Language
,	O
trace	O
bundle	O
in	O
a	O
single	O
package	O
.	O
</s>
<s>
Nucleus	B-Operating_System
Ready	O
Start	O
comes	O
in	O
versions	O
packaged	O
for	O
ARM	B-Architecture
,	O
MIPS	B-Device
and	O
PPC	O
.	O
</s>
<s>
Nucleus	B-Operating_System
ReadyStart	O
adds	O
specialized	O
eclipse	B-Application
plugins	O
to	O
CodeBench	O
to	O
provide	O
simplified	O
build	O
and	O
configuration	O
workflows	O
and	O
debugging	O
enhancements	O
including	O
kernel	B-Operating_System
awareness	O
,	O
loadable	O
module	O
support	O
,	O
tracing	O
and	O
profiling	O
tools	O
.	O
</s>
<s>
Nucleus	B-Operating_System
SafetyCert	O
has	O
been	O
certified	O
for	O
the	O
highest	O
levels	O
of	O
safety	O
for	O
DO-178C	O
,	O
IEC	O
61508	O
,	O
IEC	B-Application
62304	I-Application
,	O
and	O
ISO	O
26262	O
.	O
</s>
<s>
Example	O
devices	O
using	O
Nucleus	B-Operating_System
products	O
include	O
:	O
</s>
