- From: Frank Mori Hess <fmhess_at_users.sourceforge.net>
- Date: Sun, 2 Jan 2005 12:25:12 -0500
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Tuesday 28 December 2004 10:13 am, Doug Farley wrote: > Frank, > > Thanks for the response, however I still get errors like : > > kernel: A status: fifo_empty > kernel: ni_mio_common: DMA overwrite of free area: > kernel: ni_mio_common: ai error a_status=a4f2 > kernel: ni_mio_common: wait for dma drain timed out > > With the returned data being 0 or random large values (which I assume > are data from random memory locations where I have stepped out of the > array), even with setting my --read-buffer flag to values ranging from 1 > to 64MB. I have 2gb of physical memory, so i doubt I am running out of > it, and I'm only trying to capture 1. Any further suggestions? > Your program still has to read() the data from comedi's kernel buffer faster (on average) than the card is dma'ing it into the buffer. - -- Frank -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFB2C575vihyNWuA4URArpUAKCmHjqJI5JnJ7EdHvQWYaXhtRWJ6QCgo9pm mhmCguDTxn447o+Qo5SU9Cg= =E5Fe -----END PGP SIGNATURE-----
Received on 2005-01-02Z17:25:12