4Links Diagnostic SpaceWire Interface DSI-RG408, User Manual

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Diagnostic SpaceWire Interface
EtherSpaceLink family User Manual
17.1. 2 . Te r m i nolo g y
I
t
is i
m
p
o
r
t
a
nt to un
d
e
rs
t
a
n
d a f
e
w
o
f
t
h
e te
r
m
s
u
s
e
d
to
d
e
s c ri
be t
h
e
4
L
i
n
k s E
t
h
e
r
S
pac
eL
i
n
k p r
o
d
u
c
t
s:
U n i t A n i n di v id u a l 4 L i n k s E t h e r S pac eL i n k ha rd wa r e d ev i c e , t yp i ca ll y r unn i n g one o f i t s
f ir
m
wa r
e
p r
o
d
u
c
t
s
;
Po
r
t
Each
S
pac
e
W ir
e
c
onne
c
to
r
on
a
n
E
t
h
e
r
S
pac
eL
i
n
k
un
i
t (o
r
on
a d
ev
i c
e un
d
e
r
te
s
t)
is
c
on sid e r e d to be
a
p
o r t
.
S
pac
e
W ir
e L
i
n
k A Spac e W ir e l i n k
(o
r
ju
s
t
a l i n k
)
is a
S
pac
e
W ir
e
c
onne
c
t
i
on
f r
om
a p
o
r
t on one un
i
t
to a p o r t on a not 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 is a
n
E
t
h
e
r
net
c
onne
c
t
i
on
f r
om
a h
o
s
t
c
om
p
ute
r
net
w
o
r k
to
a
n
E t h e r S pac eL i n k ha rd wa r e d ev i c e.
B
ridg
e
A b ri d g e
(o
r s
omet
i
me
s p o r t al
)
is a d
ev
i c
e t
ha
t t
r a
n
s f
e
rs d a
t
a f r
om one me
di
um to
a not h e r . I n ou r ca s e , t h e 4 L i n k s E t h e r S pac eL i n k i nte r fac e s a r e E t h e r net - to -
S
pac
e
W ir
e b
ridg
e
s
.
17.1. 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 e s to a Na t i ve I nte r fac e , wh i ch c ommun i ca te s ove r E t h e r net v i a a TC P/ I P
s
o
ck
et
c
onne
c
t
i
on.
Th
e
E
t
h
e
r
S
pac
eL
i
n
k
un
i
t t
h
en
c
onve
r
t
s
t
h
e
r
e
c
e
i
ve
d d a
t
a s
t
r
e
a
m to S
pac
e
W ir
e.
Th is m ay be s een a s a h i e r a r chy o f p r oto 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 17 . 1: C onne c t i on o f a Spac e W ir e net w o r k to a c o mp ute r u s i n g a n E t h e r Spac e L i n k un i t.
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