I changed the subject.. Am 16.03.2012 14:49, schrieb Paul Alfille: > To hunt this down, you find that heavy USB activity causes communication > failures and puts owfs is an unusable state? No, I don't think thats a root cause. My last tests where done with only 1-4 DS9490R on a powered hub without any other USB-devices active. Maybe heavy USB-traffic or long-lines intensify the problem but it also happens in simle setups.
Referring to my post: http://article.gmane.org/gmane.comp.file-systems.owfs.devel/9120 #1) is pretty reproduceable, just a matter of time (minutes to hours), regardless wether there is one DS9490 and one sensor or 6 and 50.. (leads to #2): the mode-register isn't set after a subsequent PoR of the DS2490 IMHO, only initially, so it's set to "standard" instead of "flexible" speed which doesn't work reliable. #3 (long lines): I *think* its mostly #1+#2: reset_errors occur faster on long lines and after the reset the BM is running at standard vs. flexible speed which then worses the problem until all sensors (including the 81.xx id-chip!) is lost. As fas as I understand the code, what happens then is trying to reset/reconnect the lost BM resulting in a noop: DEBUG: ow_ds9490.c:(513) Attempting RESET on null bus DEBUG: ow_reset.c:(48) Reset error. Reconnection 4/2 until a restart of owserver the whole bus is "lost" I experienced the problems with openwrt (current trunk) &owfs2.8p8/p14 and was able to reproduce them easily with 2.8p14 on ubuntu 11.10 (#4 this might be related or not) - under openwrt I get masses of usb 1-1.1: usbfs: usb_submit_urb returned -28 in dmesg > I need to create a test bed > to mimic and correct this. Would be no issue to setup some systems for testing! best regards Michael ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
