RE: Re: Is xPL the ideal work-around? Need to access the LPT port from Mister House...

["Neil Wrightson" <neilw@xxxxxxxxxx>]

Hi John,

I agree with your implementation of defining the port i.e. device=888 this
is not operating system specific (apart from apple of course).
In a windows environment LPT1 could be $3BC, $378 or $278. Can a Java app
write correctly to any of these ports without actually knowing what the
true
I/O address is, only knowing LPT1?

Regards,

Neil Wrightson.


> -----Original Message-----
> From: John B [mailto:home-automation@xxxxxxx]
> Sent: Wednesday, 26 October 2005 4:10 PM
> To: ukha_xpl@xxxxxxx
> Subject: RE: [ukha_xpl] Re: Is xPL the ideal work-around?
> Need to access
> the LPT port from Mister House...
>
>
> Hi Gerry,
>
> > Anyone have any thoughts on this?  I feel I could knock this
> > out in a fairly short period of time, but I don't want to
> > produce something incompatible with an existing app.  And yet
> > there isn't anyway via Java I can use a device identifier
> > like 888 to mean anything.
>
> 888 = 0x3F8 = hardware address of parallel port - totally abstracted
> from the OS IMO.
> (LPT1 or /dev/whatever is totally OS-dependent)
>
> You will never be able to standardise on an addressing scheme across
> multiple platforms, as they all use differing naming conventions for
> their ports.
>
> Anyway, I only knocked that little IO app together in a hurry
> - the API
> wants a hardware address to send to, so that's what the device=
> parameter asks for.  Specifying LPT1 would have required
> additional work
> to map LPT1 to the base address 0x3F8.
>
> If you can put something together that is cross-platform, then that's
> great, and don't worry about being compatible with my app, as if your
> app can perform the same tasks on multiple operating systems,
> there's no
> point in me continuing to make my app available.
>
> Regards,
>
> John
>
>
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