Could someone tell me how to go about getting data from a data
acquisition card using C?...<Just general information would also
help........I'm just working on an idea at the moment>.
36  2343 
On Jun 20, 7:14 am, Ulysses <stallo...@gmai l.comwrote:
Could someone tell me how to go about getting data from a data
acquisition card using C?
No, and yes.
In general, C does not provide device specific support, and no one
here can tell you how to use C to retrieve data from a DAC.
However, should your system and environment be suitably configured,
you may be able to use the C standard fopen()/fread()/fclose()
functions to retrieve data from your device. This, of course, assumes
that your C environment provides an fopen() compatable name for the
DAC, and the underlying system and environment connect that name to
the device. This is possible in some systems (like Unix) where devices
are externalized as files, have filenames, and can be opened and read
like files (i.e. fopen("/dev/ttyS0","r"); )
>...<Just general information would also
help........I'm just working on an idea at the moment>.
Ulysses wrote:
>
Could someone tell me how to go about getting data from a data
acquisition card using C?...<Just general information would also
help........I'm just working on an idea at the moment>.
In standard C you will need to use file operations. You may need
to build a driver.
--
<http://www.cs.auckland .ac.nz/~pgut001/pubs/vista_cost.txt>
<http://www.securityfoc us.com/columnists/423>
<http://www.aaxnet.com/editor/edit043.html>
cbfalconer at maineline dot net
--
Posted via a free Usenet account from http://www.teranews.com
In article <46************ **@yahoo.com>, CBFalconer
<cb********@yah oo.comwrites
>Ulysses wrote:
>>
Could someone tell me how to go about getting data from a data
acquisition card using C?...<Just general information would also
help........I' m just working on an idea at the moment>.
In standard C you will need to use file operations. You may need
to build a driver.
This is probably incorrect... it depends in what your card does, what
sort of hardware you are plugging your card into which, if any, OS you
are running on your Hw.
You might do it as suggested with files access or you might do it with
direct register access...
--
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
\/\/\/\/\ Chris Hills Staffs England /\/\/\/\/
/\/\/ ch***@phaedsys. org www.phaedsys.org \/\/\
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
Chris Hills wrote:
<cb********@yah oo.comwrites
>Ulysses wrote:
>>>
Could someone tell me how to go about getting data from a data
acquisition card using C?...<Just general information would also
help........I 'm just working on an idea at the moment>.
In standard C you will need to use file operations. You may need
to build a driver.
This is probably incorrect... it depends in what your card does,
what sort of hardware you are plugging your card into which, if
any, OS you are running on your Hw.
You might do it as suggested with files access or you might do it
with direct register access...
Please demonstrate how to set up legal direct register access in
STANDARD C (no extensions). Quote the enabling lines from N869
please.
--
<http://www.cs.auckland .ac.nz/~pgut001/pubs/vista_cost.txt>
<http://www.securityfoc us.com/columnists/423>
<http://www.aaxnet.com/editor/edit043.html>
cbfalconer at maineline dot net
--
Posted via a free Usenet account from http://www.teranews.com
Chris Hills wrote:
In article <46************ **@yahoo.com>, CBFalconer
<cb********@yah oo.comwrites
>>Ulysses wrote:
>>>
Could someone tell me how to go about getting data from a data
acquisition card using C?...<Just general information would also
help........I 'm just working on an idea at the moment>.
In standard C you will need to use file operations. You may need
to build a driver.
This is probably incorrect... it depends in what your card does, what
sort of hardware you are plugging your card into which, if any, OS you
are running on your Hw.
Verily.
You might do it as suggested with files access or you might do it with
direct register access...
They're both outside the scope of the [1] standard, though. (File operations
themselves aren't, but connecting a file-like thing to a device is.)
The answer is: it depends on what your local implementation offers. You'll
have to find out.
[1] C90 or C99. Other standards may apply, but I've no idea what they'd
be. Other de-facto conventions may apply; I don't know what those
are either.
--
Chris "flat, not hilly" Dollin
Hewlett-Packard Limited registered no:
registered office: Cain Road, Bracknell, Berks RG12 1HN 690597 England
In article <46************ ***@yahoo.com>, CBFalconer
<cb********@yah oo.comwrites
>Chris Hills wrote:
><cb********@ya hoo.comwrites
>>Ulysses wrote:
Could someone tell me how to go about getting data from a data
acquisitio n card using C?...<Just general information would also
help........ I'm just working on an idea at the moment>.
In standard C you will need to use file operations. You may need
to build a driver.
This is probably incorrect... it depends in what your card does,
what sort of hardware you are plugging your card into which, if
any, OS you are running on your Hw.
You might do it as suggested with files access or you might do it
with direct register access...
Please demonstrate how to set up legal direct register access in
STANDARD C (no extensions). Quote the enabling lines from N869
please.
No. Use extensions. We are talking SW engineering not religious
bigotry.
BTW N869 is NOT standard C Standard C is ISO9899:1999
--
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
\/\/\/\/\ Chris Hills Staffs England /\/\/\/\/
/\/\/ ch***@phaedsys. org www.phaedsys.org \/\/\
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
Chris Hills wrote:
<cb********@yah oo.comwrites
>Chris Hills wrote:
.... snip ...
>>
>>You might do it as suggested with files access or you might do it
with direct register access...
Please demonstrate how to set up legal direct register access in
STANDARD C (no extensions). Quote the enabling lines from N869
please.
No. Use extensions. We are talking SW engineering not religious
bigotry.
You can get away with that in comp.arch.embed ded, but not here.
This newsgroup discusses PORTABLE standard C.
--
<http://www.cs.auckland .ac.nz/~pgut001/pubs/vista_cost.txt>
<http://www.securityfoc us.com/columnists/423>
<http://www.aaxnet.com/editor/edit043.html>
cbfalconer at maineline dot net
--
Posted via a free Usenet account from http://www.teranews.com
In article <46************ ***@yahoo.com>, CBFalconer
<cb********@yah oo.comwrites
>Chris Hills wrote:
><cb********@ya hoo.comwrites
>>Chris Hills wrote:
... snip ...
>>>
You might do it as suggested with files access or you might do it
with direct register access...
Please demonstrate how to set up legal direct register access in
STANDARD C (no extensions). Quote the enabling lines from N869
please.
No. Use extensions. We are talking SW engineering not religious
bigotry.
You can get away with that in comp.arch.embed ded, but not here.
This newsgroup discusses PORTABLE standard C.
No we discuss the use of C
If you want to only discuss portable standard C that is up to you... go
find some one else to bug.
--
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
\/\/\/\/\ Chris Hills Staffs England /\/\/\/\/
/\/\/ ch***@phaedsys. org www.phaedsys.org \/\/\
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
Chris Hills <ch***@phaedsys .orgwrites:
In article <46************ ***@yahoo.com>, CBFalconer
<cb********@yah oo.comwrites
>>Chris Hills wrote:
>><cb********@y ahoo.comwrites
Chris Hills wrote:
... snip ...
>>>>
You might do it as suggested with files access or you might do it
with direct register access...
Please demonstrate how to set up legal direct register access in
STANDARD C (no extensions). Quote the enabling lines from N869
please.
No. Use extensions. We are talking SW engineering not religious
bigotry.
You can get away with that in comp.arch.embed ded, but not here.
This newsgroup discusses PORTABLE standard C.
No we discuss the use of C
We discuss C, which is defined by one or more standards.
The existence of extensions is entirely topical, and it's likely (but
by no means certain) that some such extensions will be required to
solve the OP's problem.
The details of those extensions are not topical, and should be
discussed in some system-specific newsgroup. (Those details are
likely to be more closely related to the operating system than to the
language.)
--
Keith Thompson (The_Other_Keit h) ks***@mib.org <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <* <http://users.sdsc.edu/~kst>
"We must do something. This is something. Therefore, we must do this."
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