4Links Diagnostic SpaceWire Interface DSI-RG408, Руководство пользователя

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Diagnostic SpaceWire Interface
EtherSpaceLink family User Manual
17. 6 . 22 .
EtherSpaceLink_link_connected()
S ynops i s
int EtherSpaceLink_link_connected ( EtherSpaceLink DSI_unit
)
D esc ri pt i on
EtherSpaceLink_link_connected()
d ete r m i ne s wh et h e r t h e S pac e W ir e l i n k is c u rr entl y
c
onne
c
te
d
(
i
.e.
wh
et
h
e
r
t
h
e S
pac
e
W ir
e
s
t
a
te m
ach i
ne
is i
n t
h
e
R
un
s
t
a
te).
I nput p ara mete r s
DSI_unit
t
h
e
ha
n
d
le
r
etu
r
ne
d
b
y a s
u
cc
e
ss f
ul
EtherSpaceLink_open()
c
omm
a
n
d
.
Retu r ns
+ 1 Th e l i n k is c onne c te d
0
Th
e l
i
n
k is
not
c
onne
c
te
d
- 1 A
n e
rr
o
r
o
cc
u
rr
e
d
Note
EtherSpaceLink_link_connected()
s en ds a s t a tu s r e q ue s t to t h e E t h e r S pac eL i n k un i t a n d
t
h
en
r
e
a ds f r
om t
h
e
TC
P/
I
P
c
onne
c
t
i
on unt
i
l
i
t
r
e
c
e
i
ve
s a s
u
cc
e
ss f
ul
r
e
s p
on
s
e.
I f
t
h
e un
i
t un
d
e
r
te
s
t
g ene r a te s a s y n ch r onou s t r aff i c wh i le t h is p oll i n g t ak e s p l ac e , t ha t S pac e W ir e t r aff i c m ig h t be
dis ca rd
e
d
.
EtherSpaceLink_link_connected()
r etu r n s a r e s ult c o d e o f - 1 i f a n y S pac e W ir e d a t a is lo s t.
See
s
e
c
t
i
on
17
.5.
3,
“
A s y
n
ch r
onou
s Iss
ue
s d
u
ri
n
g
St
a
tu
s
Poll
i
n
g
”
,
E xa mple
EtherSpaceLink DSI_unit;
// Open a TCP/IP link to the ESL unit
DSI_unit = EtherSpaceLink_open ( "192.168.3.40" );
// Set up Link 1
EtherSpaceLink_set_active_link ( DSI_unit, 1 );
EtherSpaceLink_set_mode ( DSI_unit, EtherSpaceLink_LINK_mode_normal );
// Wait for a connection
while ( EtherSpaceLink_link_connected ( DSI_unit ) == 0 )
{ usleep ( 5000 );
}
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