- From: Frank Mori Hess <fmhess_at_users.sourceforge.net>
- Date: Sun, 20 Oct 2002 10:03:46 -0500
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Sunday 20 October 2002 03:41 am, Tomasz Motylewski wrote: > > Why I can not just set up the transfer and then peek into the buffer from > time to time when(if) I wish? When the DMA ring is circular there is no > need for any interrupts at all. I know you will say "register the callback > and just do there comedi_set_user_int_count()", but these are precious > microseconds! Why Comedi driver can not just configure and start the card > and get out of my way? > Tomek, Well, I'd say the obvious answer would be that noone has cared enough about this particular ability to code it, whereas being able to detect possibly corrupt data is vital. Adding a command flag that disables buffer overrun checking for mmap-style access to comedi's buffer seems reasonable though. - -- Frank -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE9ssXV5vihyNWuA4URAhjRAKDYHFXngaUVPVj8CGopwadvWk4TPwCgoC7F ajFl/VVFsjpPiVMX4mFBoNY= =C4sP -----END PGP SIGNATURE-----
Received on 2002-10-20Z14:03:46