i don't know how alias work but you have a directory /uncached/xxxxxxxxxxxx/temperature and /xxxxxxxxxxxx/temperature you should use the cached version, not the uncached
2011/2/5 patyrk <[email protected]>: > Dnia 2011-02-05, sob o godzinie 11:23 -0500, Paul Alfille pisze: >> Yes, you need the cache to store the time markers. > > To Roberto: > Does owread -s 2485 patryk/temperature use the cache? > > >> If simultaneous works in passive mode, I'll make the change. > I think with all parasite XOR powered it will work. But I'm not certain > what happens with mixed configuration. > Specs says this > If the DS18B20 is powered by an > external supply, the master can issue read time slots after the Convert > T command and the DS18B20 will > respond by transmitting a 0 while the temperature conversion is in > progress and a 1 when the conversion > is done. In parasite power mode this notification technique cannot be > used since the bus is pulled high by > the strong pullup during the conversion. > > Is this "read time slots" optional? > > -- > P4trykx > > > > > > > > >> >> On Sat, Feb 5, 2011 at 10:54 AM, Roberto Spadim <[email protected]> >> wrote: >> > maybe it works with cached version, not uncached >> > >> > 2011/2/5 patyrk <[email protected]>: >> >> Hello >> >> Fist, sorry for double messages. My e-mail client went nuts. >> >> >> >> I previously said that simultaneous temp. conversion is not possible >> >> with parasite power. Well, I was wrong. This mail is to sum up all that >> >> wrote before. >> >> >> >> The specs of ds18b20 aren't very clear about it. However there is a >> >> command skip rom mentioned on page 11 >> >> >> >> SKIP ROM [CCh] >> >> The master can use this command to address all devices on the bus >> >> simultaneously without sending out >> >> any ROM code information. For example, the master can make all DS18B20s >> >> on the bus perform >> >> simultaneous temperature conversions by issuing a Skip ROM command >> >> followed by a Convert T [44h] >> >> command. >> >> >> >> Moreover I asked about this simultaneous conversion on some Polish uC >> >> board and 2 users replied that they use this feature and it works even >> >> with parasite power. So I thinks it would be nice to have this feature >> >> working in owfs because its very useful with many ds1820. >> >> >> >> I've found some messages form 2006 and 2008 on this list that say >> >> simultaneous is working. But it seems not to work in my case. I use >> >> ds2480b master connected to serial port and few ds18b20 and 2 ds18s20. >> >> >> >> Maybe I'm using it wrong. This is my script >> >> #!/bin/sh >> >> owwrite -s 2485 /simultaneous/temperature "1" >> >> >> >> temp="temperature" >> >> owread -s 2485 patryk/"$temp" >> >> owread -s 2485 pokoj/"$temp" >> >> owread -s 2485 pokoj_grzejnik/"$temp" >> >> owread -s 2485 korytarz/"$temp" >> >> owread -s 2485 korytarz_grzejnik/"$temp" >> >> owread -s 2485 tata/"$temp" >> >> owread -s 2485 dziadek/"$temp" >> >> owread -s 2485 zielony/"$temp" >> >> >> >> echo "koniec" >> >> >> >> >> >> It takes about 10 seconds no matter if I use simultaneous. >> >> owwrite takie about 0.02 seconds that's to short. >> >> >> >> >> >> -- >> >> p4trykx >> >> >> >> >> >> >> >> >> >> >> >> ------------------------------------------------------------------------------ >> >> The modern datacenter depends on network connectivity to access resources >> >> and provide services. The best practices for maximizing a physical >> >> server's >> >> connectivity to a physical network are well understood - see how these >> >> rules translate into the virtual world? >> >> http://p.sf.net/sfu/oracle-sfdevnlfb >> >> _______________________________________________ >> >> Owfs-developers mailing list >> >> [email protected] >> >> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> >> >> >> >> > >> > >> > >> > -- >> > Roberto Spadim >> > Spadim Technology / SPAEmpresarial >> > >> > ------------------------------------------------------------------------------ >> > The modern datacenter depends on network connectivity to access resources >> > and provide services. The best practices for maximizing a physical server's >> > connectivity to a physical network are well understood - see how these >> > rules translate into the virtual world? >> > http://p.sf.net/sfu/oracle-sfdevnlfb >> > _______________________________________________ >> > Owfs-developers mailing list >> > [email protected] >> > https://lists.sourceforge.net/lists/listinfo/owfs-developers >> > >> >> ------------------------------------------------------------------------------ >> The modern datacenter depends on network connectivity to access resources >> and provide services. The best practices for maximizing a physical server's >> connectivity to a physical network are well understood - see how these >> rules translate into the virtual world? >> http://p.sf.net/sfu/oracle-sfdevnlfb >> _______________________________________________ >> Owfs-developers mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/owfs-developers > > > > ------------------------------------------------------------------------------ > The modern datacenter depends on network connectivity to access resources > and provide services. The best practices for maximizing a physical server's > connectivity to a physical network are well understood - see how these > rules translate into the virtual world? > http://p.sf.net/sfu/oracle-sfdevnlfb > _______________________________________________ > Owfs-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/owfs-developers > > -- Roberto Spadim Spadim Technology / SPAEmpresarial ------------------------------------------------------------------------------ The modern datacenter depends on network connectivity to access resources and provide services. The best practices for maximizing a physical server's connectivity to a physical network are well understood - see how these rules translate into the virtual world? http://p.sf.net/sfu/oracle-sfdevnlfb _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
