[IGSTK-Developers] number of ports on polaris

[Andinet Enquobahrie]

Hi Ziv,

Your timing is impeccable! :)

We had a discussion on this and other related topics yesterday
with Patrick.  From what we could tell, the  assignment of
the total number of ports to 12 is  arbitrary. May be David can weigh on
this. Furthermore, virtual ports 3-11 are currently reserved for wireless
tracker tools. This choice is also I think an arbitrary one.

We will be revisiting these parameters as part of the refactoring.

-Andinet



On 10/24/07, Ziv Yaniv <zivy at isis.imac.georgetown.edu> wrote:
>
> Hi Andinet, Luis,
>
> Currently the number of possible ports supported by the
> igstk::PolarisTracker is set to 12. I'm wondering why this specific
> number. From the API specification that I have, the supported number of
> ports is 255:
> "The system assigns each tool a port handle. Port handles are two
> characters in hexadecimal format, 0x01 to 0xFF. The two characters
> replace the single character of port numbers and port letters used in
> previous versions of the Polaris API, both in sending commands and
> receiving replies"
>
> If this was an arbitrary decision we should change it to 255 as part of
> the refactoring.
>
>                             thanks
>                                Ziv
>
>
> --
> Ziv Yaniv, PhD., Research Assistant Professor
> Imaging Science and Information Systems (ISIS) Center
> Department of Radiology
> Georgetown University Medical Center
> 2115 Wisconsin Avenue, Suite 603
> Washington, DC, 20007,
>
> Phone: +1-202-687-7286
> Fax: +1-202-784-3479
> email: zivy at isis.imac.georgetown.edu
> web: http://isiswiki.georgetown.edu/zivy/
>
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