On Wed, Mar 03, 2004 at 07:57:24PM +1100, Peter Jeremy wrote: > On Wed, Mar 03, 2004 at 07:27:31AM +0100, Bernd Walter wrote: > >Currently I get the states via kern.cp_time, but this only allows > >a granularity of a single second and I need something around 50-100ms. > > As far as I can tell - both by studying the source code and by > running "sysctl -x kern.cp_time" in a loop - kern.cp_time increments > continuously. statclock() increments the relevant element in the > array by one at a rate of stathz (128Hz by default).
Yes - my fault - the limit was selfmade... > Obviously, you need to smooth the result over a period substantially > longer than 1/128 second to get a useful result (unless you want to > pulse-width modulate your display) but 12.8Hz (stathz/10) would give > you 10 samples which would be ideal for a 10-segment bargraph. It's a 16-segment USB which does the modulation itself. I only need to send a 16bit bitmask. -- B.Walter BWCT http://www.bwct.de [EMAIL PROTECTED] [EMAIL PROTECTED] _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
