- From: Frank Mori Hess <fmhess_at_users.sourceforge.net>
- Date: Sat, 29 Nov 2003 17:55:47 -0500
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Monday 24 November 2003 04:34 am, Nils Juergens wrote: > On Sun, 23.11.03, Frank Mori Hess <fmhess_at_users.sourceforge.net> wrote: > > Could add fields for specifying what inputs are connected to (input 0 > > connected to external input pin, or internal oscillator?). > > This is needed to fit the counter of the pci-1710 into the scheme. > > > Could make triggers/actions more involved, for example "trigger on > > accumulator reaches 0", or specify a value to reload the counter with > > for the COMEDI_RESET_ACCUMULATOR action. Could add an action that > > sets the counter's output, like "pulse output when accumulator > > reaches 0". > > This is also needed for the counter on the pci-1710 (which is one-third > of an Intel 82C54). The counter has a mode setting which defines the > usage of the gate input, but also what happens when the accumulator > reaches zero. > > It would be nice if you could extend the api with those two. > > Thanks, > > Nils Feel free to modify the API to suit your needs. I myself am having an increasingly difficult time seeing the benefit of coming up with a completely general counter API. When I look at it, it feels too abstract and far away from the actual programmability of the hardware. I'd be more comfortable just adding a '8253/8254 counter mode' configuration instruction, and similar things. Then after we get support for a few different types of counters, it would be more clear where adding a little abstraction would give a payoff. - -- Frank -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE/ySPz5vihyNWuA4URAifnAJ9Jk/n/vu9fhVhuGcTMN0jP8Qcp6QCgkr0I mIG+qkniMPT3l2IIVia4MqE= =C4Pi -----END PGP SIGNATURE-----
Received on 2003-11-29Z22:55:47