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| jamesh at Volition-inc.co |
 Posted: Tue Sep 21, 2004 1:20 pm |
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All of the driver-related functions are not exported from beam.dll,
including driver_output. This prevents dynamically loaded drivers from even
*loading* under Windows.
This is a showstopper for users of Wings, esdl, or any other application
making use of custom drivers. I'd like to see a new beam.dll for R9C-2
posted as soon as possible.
James
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| vlad_dumitrescu at hotmai |
| Posted: Tue Sep 21, 2004 2:22 pm |
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Hmm, they work for me (from the binary distribution)... Maybe it's something
with the source build?
/Vlad
----- Original Message -----
From: "James Hague" <jamesh_at_Volition-inc.com>
To: <erlang-bugs_at_erlang.org>
Sent: Tuesday, September 21, 2004 3:22 PM
Subject: Missing beam.dll exports in R9C-2 for Windows
> All of the driver-related functions are not exported from beam.dll,
> including driver_output. This prevents dynamically loaded drivers from
> even
> *loading* under Windows.
>
> This is a showstopper for users of Wings, esdl, or any other application
> making use of custom drivers. I'd like to see a new beam.dll for R9C-2
> posted as soon as possible.
>
> James
>
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| jamesh at Volition-inc.co |
| Posted: Tue Sep 21, 2004 2:25 pm |
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> Hmm, they work for me (from the binary distribution)... Maybe
> it's something with the source build?
Hmmm...I couldn't get my drivers working because of the exports not being
found, so I used Borland's tdump utility to view the exports, and they
weren't there. Could you send me your beam.dll?
James
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| Panos.Kontakos at netkits |
| Posted: Tue Sep 21, 2004 3:24 pm |
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you need to modify the DRIVER_INIT subroutine and rebuild the drivers. The method of exporting the driver entry points has been modified. A good sample might be some of the internal port drivers.
Panos
________________________________
From: owner-erlang-bugs_at_erlang.org on behalf of James Hague
Sent: Tue 9/21/2004 7:27 AM
To: 'Vlad Dumitrescu'; erlang-bugs_at_erlang.org
Subject: RE: Missing beam.dll exports in R9C-2 for Windows
> Hmm, they work for me (from the binary distribution)... Maybe
> it's something with the source build?
Hmmm...I couldn't get my drivers working because of the exports not being
found, so I used Borland's tdump utility to view the exports, and they
weren't there. Could you send me your beam.dll?
James
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| jamesh at Volition-inc.co |
| Posted: Tue Sep 21, 2004 3:31 pm |
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Guest
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> you need to modify the DRIVER_INIT subroutine and rebuild the
> drivers. The method of exporting the driver entry points has
> been modified. A good sample might be some of the internal
> port drivers.
Okay, thank you. Somehow I don't ever recall reading this in the release
notes; I must have missed it.
James
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| Panos.Kontakos at netkits |
| Posted: Tue Sep 21, 2004 3:33 pm |
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I do not recall if it is in the release notes, but I found the hard way in order to rebuild my port drivers.
panos
________________________________
From: James Hague [mailto:jamesh_at_Volition-inc.com]
Sent: Tue 9/21/2004 8:33 AM
To: Panos Kontakos; Vlad Dumitrescu; erlang-bugs_at_erlang.org
Subject: RE: Missing beam.dll exports in R9C-2 for Windows
> you need to modify the DRIVER_INIT subroutine and rebuild the
> drivers. The method of exporting the driver entry points has
> been modified. A good sample might be some of the internal
> port drivers.
Okay, thank you. Somehow I don't ever recall reading this in the release
notes; I must have missed it.
James
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| jamesh at Volition-inc.co |
| Posted: Tue Sep 21, 2004 6:23 pm |
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> Okay, thank you. Somehow I don't ever recall reading this in
> the release
> notes; I must have missed it.
I have this sorted out now. The problem was that the method of dynamically
linking in a driver under Windows changed quite a bit. Rather than the
driver code referencing symbols in beam.dll and having the DLL loader
resolve them, there's now a table of function pointers passed to the driver
upon initialization. This is cleaner than the old method, and makes it
easier to see what functions a driver can access.
erl_driver.h attempts to hide the changes, so you can simply recompile after
a few tweaks. But this only works if the driver is written in C. In my
case, I used Delphi, so I had to write my own erl_driver equivalent. It's
easy enough to change, but it would have been nice to see a more up front
mention of the driver linkage changes. Perhaps in R10?
James
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| samlauncher |
| Posted: Thu Feb 24, 2011 1:08 pm |
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Joined: 24 Feb 2011
Posts: 1
Location: Pakistan
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| Hey guys m looking for best exporters plz help…. |
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| cheung |
| Posted: Thu Feb 16, 2012 3:18 am |
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| cheung |
| Posted: Tue Feb 21, 2012 3:25 am |
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| wailian |
| Posted: Tue Mar 20, 2012 2:07 am |
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| i/p transducer requires a standard input and is for use with linear pneumatic actuators and has high air capacity. It can be easy change of the output signal from. electro pneumatic transducer is used, for example, in the biomedical field for the pneumatic control of a cardiac module, or artificial heart. |
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