參數(shù)資料
型號: HIF_SPEC
英文描述: EZ-030 Demonstration Board Theory of Operation Host Interface (HIF) Specification
中文描述: 易- 030演示板的經(jīng)營理論主機接口(誘導因子)規(guī)格
文件頁數(shù): 44/118頁
文件大?。?/td> 356K
代理商: HIF_SPEC
3–20
Host Interface (HIF) Specification
44
Return Value
Count
Non-ASYNC
ASYNC
NBLOCK
gr96=lr4
success
n/a
(NBLOCK mode is not illegal
for
write
requests, but
requests are performed in
either synchronous or
ASYNC mode. Return val-
ues are interpreted accord-
ingly.)
0
gr96 < lr4
fail
=0, success
gr96 <0
extreme
fail
In the Return Value table, for normal synchronous
write
service requests, the
return value contains a
count
of the number of bytes written. If the value
returned in
gr96
is equal to the
nbytes
argument passed to the service in
lr4
,
the write operation was successful. Any other return value indicates that an
error occurred. If
gr96
contains a value between 0 and the value of
nbytes
, the
failure is not catastrophic. Negative values returned in
gr96
indicate extreme
errors.
For ASYNC mode, the operation is only scheduled by invoking the
write
service, so the return value in
gr96
merely indicates that the request succeeded
or failed. A return value of 0 in
gr96
indicates that the asynchronous write
operation was successfully scheduled.
Nonblocking
write
requests are performed in either synchronous or
asynchronous mode, depending on whether the ASYNC operating mode was
selected. NBLOCK mode is ignored; the return value in
gr96
is interpreted
according to the values shown for non-ASYNC and ASYNC modes in the
table.
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