I've actually tried to isolate the DS2409/DS1820 on a short, single network branch, so it does not appear to be a network or hardware problem. Additionally, I have tried other 1-wire adapters and different DS1820s to make sure the error is repeatable.
Can anyone explain what "passive mode" is? I've found some references to the fact that 1-wire devices cannot be parasitically powered, while in passive mode. Is this relevant to the 1-wire bus master, or something in owfs? Thanks Mike Roberto Spadim wrote: > maybe a hardware error cause a reset on ds18s20 > try it near ds9097 > > 2008/9/8 Mike Dunn (owfs-devel) <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> > > Hi, > > I was hoping that someone could help me with a problem I've > encountered with my DS18S20's. I am getting the dreaded 85C error > when I parasitically power a the DS18S20 on either the main or aux > branch of my DS2409 based hub. If I provide +5 to the temp > sensor, or move the sensor (in parasite mode) to the main branch, > the sensor works normally. The sensor also works behind the > DS2409 in parasite mode, if I probe the sensor using Digitemp. > > In researching the problem, I've tested with 2.7p2, 2.7p4, and > yesterday's CSV. I've also tested the patch Paul provided in last > week's thread regarding an 85C problem, but it appears to have had > no effect. The problem also reproducable using a DS9490 USB > adapter, a DS9097 serial adapter, and on a small, isolated 1-wire > network. > > Any help would be greatly appreciated! I've captured a log > (error_level=9) during which I owdir the device, owread unpowered > (producing the 85C error) and then owread again with power. The > log was captured using owfs 2.7p6 (yesterday's CSV with the 85C > patch) on a Debian Etch host. > > Thanks! > Mike Dunn > > > trillian:/usr/bin# owdir -s 4304 /1F.16E903000000/aux > /1F.16E903000000/aux/10.9B317F010800 > trillian:/usr/bin# owdir -s 4304 /1F.16E903000000/aux/10.9B317F010800 > /1F.16E903000000/aux/10.9B317F010800/address > /1F.16E903000000/aux/10.9B317F010800/crc8 > /1F.16E903000000/aux/10.9B317F010800/die > /1F.16E903000000/aux/10.9B317F010800/family > /1F.16E903000000/aux/10.9B317F010800/id > /1F.16E903000000/aux/10.9B317F010800/locator > /1F.16E903000000/aux/10.9B317F010800/power > /1F.16E903000000/aux/10.9B317F010800/present > /1F.16E903000000/aux/10.9B317F010800/r_address > /1F.16E903000000/aux/10.9B317F010800/r_id > /1F.16E903000000/aux/10.9B317F010800/r_locator > /1F.16E903000000/aux/10.9B317F010800/temperature > /1F.16E903000000/aux/10.9B317F010800/temphigh > /1F.16E903000000/aux/10.9B317F010800/templow > /1F.16E903000000/aux/10.9B317F010800/trim > /1F.16E903000000/aux/10.9B317F010800/trimblanket > /1F.16E903000000/aux/10.9B317F010800/trimvalid > /1F.16E903000000/aux/10.9B317F010800/type > trillian:/usr/bin# owread -s 4304 > /1F.16E903000000/aux/10.9B317F010800/temperature > 85trillian:/usr/bin# > trillian:/usr/bin# owread -s 4304 > /1F.16E903000000/aux/10.9B317F010800/temperature > 26.5trillian:/usr/bin# > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
