Thanks for clearing up that worry I had. Presently I had updates following
the callproc, but now I shall remove them.
Philip Lukidis
-----Original Message-----
From: Niels [mailto:email@hidden]
Sent: Friday, October 21, 2005 4:49 PM
To: Philip Lukidis
Cc: email@hidden
Subject: Re: TimeStamps with ischo. transfers
Hi Philip -
The update step for transmit copies the DMA timestamp to your
timestamp buffer, and can copy user defined isoch headers to the
hardware DMA program. If you are not using time stamps and you are
not updating your headers manually for a running program, you do not
need the update step.
.niels
niels gabel
firewire cpu software
apple computer, inc.
On Oct 21, 2005, at 7:31 AM, Philip Lukidis wrote:
> Actually, I just reread the doc, which says that an update is
> automatically done for transmit DCL commands (send) when the DCL
> program is started, so I should be OK, as an update has been called
> once before each sendPacketStart.
>
> I'll just further mention that I have two possible cases for send
> (I have no timestamps):
> a) I call update on the sends before the send callproc.
> b) I call update on the sends after the send callproc.
>
> Since I don't currently use timestamps for send, either case should
> be fine, right?
>
> thanks,
>
> Philip Lukidis
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