4Links EtherSpaceLink Series, User Manual

Page: 37 / 110

EtherSpaceLink-RG408
EtherSpaceLink family User Manual
14.1. 2 . Te r m i nolo g y
It i s i m
po
r t
a
nt t
o u
nde r st
a
nd
a f
e
w o f
t
h
e te r ms
u
sed t
o
des
c
ri be t
h
e
4
L i n
k
s
E
t
h
e rS
p ac
eL i n
k p
r
o
d
u c
ts:
U n i t A n i nd ivi d u a l 4 L i n k s E t h e rS p ac eL i n k ha r d w a r e de vi c e , t yp i ca lly r u nn i n g o ne o f i ts
f
ir m
w a
r e
p
r
o
d
u c
ts;
Po
r t
E ach
S
p ac
e
W
ir e
c o
nne
c
t
o
r
o
n
a
n
E
t
h
e rS
p ac
eL i n
k u
n i t (
o
r
o
n
a
de vi
c
e
u
nde r test ) i s
c
o ns i de r ed t o be
a
po
r t
.
S
p ac
e
W
ir e L i n
k A Spac e W ir e l i n k
(
o
r j
u
st
a l i n k
) i s
a
S
p ac
e
W
ir e
c o
nne
c
t i
o
n
f
r
o
m
a po
r t
o
n
o
ne
u
n i t
t o a po r t o n a n o t h e r .
E
t
h
e r net L i n
k A
n
E t h e r net l i n k
i s
a
n
E
t
h
e r net
c o
nne
c
t i
o
n
f
r
o
m
a h o
st
c o
m
pu
te r net
wo
r
k
t
o a
n
E t h e rS p ac eL i n k ha r d w a r e de vi c e.
B
ri d g e
A b ri d g e
(
o
r s
o
met i mes
po r t al
) i s
a
de vi
c
e t
ha
t t r
a
ns
f
e r s d
a
t
a f
r
o
m
o
ne med i
u
m t
o
a n o t h e r . In ou r ca se , t h e 4 L i n k s E t h e rS p ac eL i n k i nte r fac es a r e E t h e r net - t o -
S
p ac
e
W
ir e b ri d g es.
14.1. 3 . P r otocol H i e rar chy
Th e C- l a n g u a g e A P I i nte r fac es t o a Na t iv e Inte r fac e , w h i ch c o mm u n i ca tes o v e r E t h e r net vi a a TC P/ I P
s
o c k
et
c o
nne
c
t i
o
n.
Th
e
E
t
h
e rS
p ac
eL i n
k u
n i t t
h
en
c o
n v e r ts t
h
e r e
c
e iv ed d
a
t
a
st r e
a
m t
o
S
p ac
e
W
ir e.
Th i s m a y be seen a s a h i e r a r ch y o f p r o t o c ol s:
Ethernet
SpaceWire Link
Computer
EtherSpaceLink
network under test
SpaceWire
SpaceWire
SpaceWire
Data stream
TCP/IP
TCP/IP
Native Interface
API
User Program
network under test
Fig u r e 1 4. 1: Co nne c t i o n of a Spac e W ir e net wo r k t o a compu te r u s i n g a n E t h e r Spac e L i n k u n i t.
4Links Limited
www.4Links.co.uk
support@4Links.co.uk
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