[gmpi] Re: R: Re: Topic 4: Host Interface

On Fri, 28 Mar 2003, David Viens wrote:

> Of course, if TimeInfo is propagated that way.
> but are we sure that thats what we want?

Unless there is a good reason why not :)

> For us, master/slave is a separate interface between modules,
> (like parameters) as we thought the users had enough cables
> to worry about allready :)

Let's not think too much about the user perspective here:- any host should
be able to abstract from this and, if it wants to present a simple time
interface to the user, buss time data from its master to all plugs needing
it. No user intervention needed there.

> Also we wanted to allow synching between modules
> that could be many levels appart in a module hierachy (groups),
> and propagating TimeInfo with wires through layers of groups
> seemed a bit odd when only one module in a hierarchy needed
> that info.

Again it's the app-designer's option how to present this to the user (if
at all).

> Other question on top of my head:
> If we do make the TimeInfo a "pin",
> Will the potential slave be automatically slaved if someone connects
> a sync cable to it from a master?

Implementation-dependent, as far as I can see, but, generally yes. A
module capable of slaving to external sources will check the time pin for
connection and if it's getting valid time info it will slave to the input
data on the pin.

> What if this module allready is a master to someone else ?
> Will that make the equivalent of a "passthrough" ?

Potentially, yes.

Regards,
        Angus.


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