4Links EtherSpaceLink Series, Руководство пользователя

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EtherSpaceLink-RG408
EtherSpaceLink family User Manual
14. 6 .7.
EtherSpaceLink_write_buffer_empty()
S ynops i s
int EtherSpaceLink_write_buffer_empty ( EtherSpaceLink ESL_unit
)
D esc ri pt i on
EtherSpaceLink_write_buffer_empty()
ch e c k s w h et h e r t h e r e i s a n y d a t a w a i t i n g t o be
t r
a
nsm i tted.
Th
i s i s
u
se
f ul
i
f you
need t
o k
n
ow
t
ha
t
a ll
d
a
t
a
sent
ha
s
ac
t
u a lly
been t r
a
nsm i tted
o
n t
h
e
S p ac e W ir e l i n k .
N
o te: t
h
i s d o es n o t
ch
e
c
k
f
o r
a
n y d
a
t
a
be i n g
h
e l d i n t
h
e st o r e
-a
nd
-f
o r w
a
r d b u
ff
e r ( i
f
p r esent ) .
I nput p ara mete r s
ESL_unit
t
h
e
ha
nd
l
e r et
u
r ned b
y a
s
u cc
ess
f ul
EtherSpaceLink_open()
c o
mm
a
nd.
Retu r ns
0 D a t a i s w a i t i n g t o be t r a nsm i tted
1
Th
e r e i s n o d
a
t
a
w
a
i t i n g t o be t r
a
nsm i tted.
-
1
A
n e rr
o
r
o cc u
rr ed.
Note
B e a w a r e t ha t
EtherSpaceLink_write_buffer_empty()
c o ns u mes S p ac e W ir e d a t a f r o m t h e
TC P/
I
P c o
nne
c
t i
o
n t
o
t
h
e
E
t
h
e rS
p ac
eL i n
k u
n i t
w h
i
l
e i t i s
w a
i t i n g
f o
r
a
s
u cc
ess
f ul
r es
po
nse. I
f
t
h
e
u
n i t
u nde r test g ene r a tes a s y n ch r o n ou s t r aff i c , t h i s m ig h t be a c o n c e r n.
EtherSpaceLink_write_buffer_empty()
r et
u
r ns
a
r es
ul
t
c o
de
o f -
1 i
f a
n
y
S
p ac
e
W
ir e d
a
t
a
i s
lo st. S ee se c t i o n 1 4 . 5 .3 , “ A s y n ch r o n ou s Iss u es d u ri n g S t a t u s Poll i n g ” ,
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