You do not need a level converter. Power the bus with 5V and no problems. I use a 2483, a close relative.
C > On Sep 30, 2015, at 11:32 AM, Jan Kandziora <j...@gmx.de> wrote: > >> Am 30.09.2015 um 19:45 schrieb Henry Pootel: >> >> I use a kernel v3.12 with w1-gpio module now. The owfs is working >> with errors. >> >> When I check devices by owdir commands, it sometimes lose one or >> more sensors or make a double of existing sensors. > Do you run the onewire with 3.3V from the Raspberry's I/O pin? If so, > have you checked all your slaves are 3.3V compatible? > > If you use a 3.3V<->5V level converter, have you checked the High->Low > transitions edges on both the 3.3V and 5V side? They have to be sharp, > without bumps near 0V or round edges at 5V (round edges are allowed on > the Low->High transitions). And of course, the transmission delay > shouldn't be more than a few microseconds. Check it with a scope and > 1:10 probe. > > >> It's 4 percents of >> asks. It's too more for me. > Errors should be in less than 1 of 1000 transmissions. If it's more, I > go check what's wrong with my circuit. > > >> And I went to looking new kernels or new >> decision. New kernel has broken my brain. And I found DS1WM with your >> help... Thanks, but I think how I can change my scheme now. > So before linux-3.12, you had it working without errors? If yes, which > kernel version was that? I ask that because I would check what has > changed in the kernel driver if you can tell me. > > >> Well, I can make a new PCB and set the DS2482 chip into my scheme. I >> think it should use a I2C bus of my PI. Isn't it? What modules must >> be loaded ( i2c-dev.ko, i2c-bcm2708.ko and ds1ws.ko ) before start >> the owserver? Should the owserver to start in the i2c mode (by >> setting in a config file )? > You need a 3.3V<->5V level converter with two channels, i2c-dev.ko and > i2c-bcm2708.ko. The i2c-tools package can help you debugging problems. > > Start owserver with --i2c=ALL:ALL. > > Kind regards > > Jan > > ------------------------------------------------------------------------------ > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/owfs-developers ------------------------------------------------------------------------------ _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
