<s>
VisSim	B-Application
is	O
a	O
visual	O
block	B-Application
diagram	I-Application
program	O
for	O
simulation	O
of	O
dynamical	O
systems	O
and	O
model-based	O
design	O
of	O
embedded	B-Architecture
systems	I-Architecture
,	O
with	O
its	O
own	O
visual	B-Language
language	I-Language
.	O
</s>
<s>
With	O
Embed	O
,	O
you	O
can	B-Protocol
develop	O
virtual	O
prototypes	O
of	O
dynamic	O
systems	O
.	O
</s>
<s>
Embed	O
automatically	O
converts	O
the	O
control	O
diagrams	O
into	O
C-code	O
ready	O
to	O
be	O
downloaded	O
to	O
the	O
target	O
hardware	O
.	O
</s>
<s>
VisSim	B-Application
or	O
now	O
Altair	O
Embed	O
uses	O
a	O
graphical	O
data	O
flow	O
paradigm	O
to	O
implement	O
dynamic	O
systems	O
based	O
on	O
differential	O
equations	O
.	O
</s>
<s>
Version	O
8	O
adds	O
interactive	O
UML	B-Application
OMG	B-Architecture
2	O
compliant	O
state	B-Application
chart	I-Application
graphs	I-Application
that	O
are	O
placed	O
in	O
VisSim	B-Application
diagrams	O
.	O
</s>
<s>
VisSim/Altair	O
Embed	O
is	O
used	O
in	O
control	O
system	O
design	O
and	O
digital	B-General_Concept
signal	I-General_Concept
processing	I-General_Concept
for	O
multidomain	O
simulation	O
and	O
design	O
.	O
</s>
<s>
It	O
includes	O
blocks	O
for	O
arithmetic	O
,	O
Boolean	O
,	O
and	O
transcendental	O
functions	O
,	O
as	O
well	O
as	O
digital	O
filters	O
,	O
transfer	O
functions	O
,	O
numerical	B-Algorithm
integration	I-Algorithm
and	O
interactive	O
plotting	O
.	O
</s>
<s>
A	O
read-only	O
version	O
of	O
the	O
software	O
,	O
,	O
is	O
available	O
free	O
of	O
charge	O
and	O
provides	O
a	O
way	O
for	O
people	O
not	O
licensed	O
to	O
use	O
VisSim	B-Application
to	O
run	O
VisSim	B-Application
models	O
.	O
</s>
<s>
The	O
viewer	O
will	O
execute	O
any	O
VisSim	B-Application
model	O
,	O
and	O
only	O
allows	O
changes	O
to	O
block	O
and	O
simulation	O
parameters	O
to	O
illustrate	O
different	O
design	O
scenarios	O
.	O
</s>
<s>
The	O
"	O
VisSim/C	O
-Code	O
"	O
add-on	O
generates	O
ANSI	O
C	B-Language
code	O
for	O
the	O
model	O
,	O
and	O
generates	O
target	O
specific	O
code	O
for	O
on-chip	O
devices	O
like	O
PWM	B-Algorithm
,	O
ADC	O
,	O
encoder	O
,	O
GPIO	B-Architecture
,	O
I2C	O
etc	O
.	O
</s>
<s>
This	O
is	O
useful	O
for	O
development	O
of	O
embedded	B-Architecture
systems	I-Architecture
.	O
</s>
<s>
After	O
the	O
behavior	O
of	O
the	O
controller	O
has	O
been	O
simulated	O
,	O
C-code	O
can	B-Protocol
be	O
generated	O
,	O
compiled	O
and	O
run	O
on	O
the	O
target	O
.	O
</s>
<s>
For	O
debugging	O
,	O
VisSim	B-Application
supports	O
an	O
interactive	O
JTAG	O
linkage	O
,	O
called	O
"	O
Hotlink	O
"	O
,	O
that	O
allows	O
interactive	O
gain	O
change	O
and	O
plotting	O
of	O
on-target	O
variables	O
.	O
</s>
<s>
The	O
VisSim	B-Application
generated	O
code	O
has	O
been	O
called	O
efficient	O
and	O
readable	O
,	O
making	O
it	O
well	O
suited	O
for	O
development	O
of	O
embedded	B-Architecture
systems	I-Architecture
.	O
</s>
<s>
VisSim	B-Application
's	O
author	O
served	O
on	O
the	O
X3J11	O
ANSI	O
C	B-Language
committee	O
and	O
wrote	O
several	O
C	B-Language
compilers	O
,	O
in	O
addition	O
to	O
co-authoring	O
a	O
book	O
on	O
C	B-Language
.	O
This	O
deep	O
understanding	O
of	O
ANSI	O
C	B-Language
,	O
and	O
the	O
nature	O
of	O
the	O
resulting	O
machine	B-Language
code	I-Language
when	O
compiled	O
,	O
is	O
the	O
key	O
to	O
the	O
code	O
generator	O
's	O
efficiency	O
.	O
</s>
<s>
VisSim	B-Application
can	B-Protocol
target	O
small	O
16-bit	B-Device
fixed	O
point	O
systems	O
like	O
the	O
Texas	B-Architecture
Instruments	I-Architecture
MSP430	I-Architecture
,	O
using	O
only	O
740	O
bytes	O
flash	O
and	O
64	O
bytes	O
of	O
RAM	O
for	O
a	O
small	O
closed-loop	O
Pulse-width	B-Algorithm
modulation	I-Algorithm
(	O
PWM	B-Algorithm
)	O
actuated	O
system	O
,	O
as	O
well	O
as	O
allowing	O
very	O
high	O
control	O
sample	O
rates	O
over	O
500kHz	O
on	O
larger	O
32-bit	O
floating	B-General_Concept
point	I-General_Concept
processors	I-General_Concept
like	O
the	O
Texas	O
Instruments	O
150MHz	O
F28335	O
.	O
</s>
<s>
Model-based	O
development	O
for	O
embedded	B-Architecture
systems	I-Architecture
is	O
becoming	O
widely	O
adopted	O
for	O
production	O
systems	O
because	O
it	O
shortens	O
development	O
cycles	O
for	O
hardware	O
development	O
in	O
the	O
same	O
way	O
that	O
Model-driven	B-Architecture
architecture	I-Architecture
shortens	O
production	O
cycles	O
for	O
software	O
development	O
.	O
</s>
<s>
VisSim	B-Application
uses	O
a	O
hierarchical	O
composition	O
to	O
create	O
nested	O
block	B-Application
diagrams	I-Application
.	O
</s>
<s>
A	O
typical	O
model	O
would	O
consist	O
of	O
"	O
virtual	O
plants	O
"	O
composed	O
of	O
various	O
VisSim	B-Application
"	O
layers	O
"	O
,	O
combined	O
if	O
necessary	O
with	O
custom	O
blocks	O
written	O
in	O
C	B-Language
or	O
FORTRAN	O
.	O
</s>
<s>
A	O
virtual	O
controller	O
can	B-Protocol
be	O
added	O
and	O
tuned	O
to	O
give	O
desired	O
overall	O
system	O
response	O
.	O
</s>
<s>
Although	O
VisSim	B-Application
was	O
originally	O
designed	O
for	O
use	O
by	O
control	O
engineers	O
,	O
it	O
can	B-Protocol
be	O
used	O
for	O
any	O
type	O
of	O
mathematical	O
model	O
.	O
</s>
<s>
File:VisSim-320x240.ogvScreenshots	O
show	O
the	O
simulation	O
of	O
a	O
sine	O
function	O
in	O
VisSim	B-Application
.	O
</s>
<s>
Communication	O
system	O
Physical	B-Application
layer	I-Application
simulation	O
(	O
modulators	B-Application
,	O
encoders	O
,	O
PLLs	O
,	O
Costas	O
Loop	O
,	O
BPSK	O
,	O
QPSK	O
,	O
DQPSK	B-General_Concept
,	O
QAM	B-Device
,	O
Bit	O
Error	O
Rate	O
(	O
BER	O
)	O
,	O
Eye	O
Diagram	O
,	O
Viterbi	B-Algorithm
algorithm	I-Algorithm
,	O
Reed	B-Error_Name
–	I-Error_Name
Solomon	I-Error_Name
,	O
etc	O
.	O
)	O
</s>
<s>
Embedded	B-Architecture
system	I-Architecture
targeting	O
for	O
Texas	O
Instruments	O
C2000	O
and	O
MSP430	B-Architecture
,	O
ARM	O
Cortex-M	O
chips	O
.	O
</s>
<s>
Supports	O
on-chip	O
peripherals	O
like	O
serial	O
ports	O
,	O
CAN	B-Protocol
,	O
PWM	B-Algorithm
,	O
Quadrature	O
Encoder	O
Pulse	O
(	O
QEP	O
)	O
,	O
Event	O
Capture	O
,	O
Serial	B-Architecture
Peripheral	I-Architecture
Interface	I-Architecture
Bus	I-Architecture
(	O
SPI	O
)	O
,	O
I²C	O
,	O
Analog-to-digital	O
converter	O
(	O
ADC	O
)	O
,	O
Digital-to-analog	O
converter	O
(	O
DAC	O
)	O
,	O
and	O
GPIO	B-Architecture
.	O
</s>
<s>
Allows	O
real-time	O
reading	O
and	O
writing	O
of	O
serial	O
data	O
from	O
the	O
VisSim	B-Application
diagram	O
.	O
</s>
<s>
User	B-Protocol
Datagram	I-Protocol
Protocol	I-Protocol
(	O
UDP	O
)	O
packet	O
read	O
and	O
write	O
.	O
</s>
