- From: Frank Mori Hess <fmhess_at_users.sourceforge.net>
- Date: Thu, 7 Nov 2002 11:39:53 -0600
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Thursday 07 November 2002 11:02 am, Daniel Koch wrote: > Hi, > > I'm using a PC104-DAS16/JR with comedi-0.7.65 and comedilib-0.7.18 with an > rthai patched 2.4.19 kernel. I would like to use cmd or mmap with realtime, > so I set the comedi_cmd flag to TRIG_RT, but comedi tells me that it`s not > possible to set the TRIG_RT flag while in DMA transfer mode. On the other > hand cmd and mmap require both an IRQ and DMA... I need to use realtime > data aquisition, because I need the full sampling rate of 100KZH which is > provided by the board. Without realtime I get I/O errors after some time > even if I increase the read_buffer_size. I'd appreciate any help, > > Daniel Koch Daniel, Have you tried using the 'timer mode' option instead of an interrupt? You still won't be able to use TRIG_RT, but it should help prevent the board's fifo from overruning. - -- Frank -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE9yqVr5vihyNWuA4URAiAbAKC0n8LK2/ZPRt2VLNai1wFJugGvnQCg4eJQ mY527qUCay3926sqSqqPIEA= =HoPk -----END PGP SIGNATURE-----
Received on 2002-11-07Z17:39:53