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Carambola and 1-wire https://www.8devices.com/community/viewtopic.php?f=1&t=73 |
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Author: | Sprite_tm [ 25 Mar 2012, 18:23 ] |
Post subject: | Carambola and 1-wire |
Author: | tgdavies [ 26 Mar 2012, 01:27 ] |
Post subject: | Re: Carambola and 1-wire |
Cool -- I mean hot! Are you using parasitic power, or connecting 3.3v to the 1-wire devices too? |
Author: | Sprite_tm [ 26 Mar 2012, 06:23 ] |
Post subject: | Re: Carambola and 1-wire |
At the moment, I'm using parasitic power - though I think the DS1820s need to have a bit more power than the parasitic pull-up can deliver... that's why I lowered the pull-up to 1K myself. It still works, although I get a CRC error every now and then, but I intend just to filter those out in software. |
Author: | pakistano [ 27 Mar 2012, 20:11 ] |
Post subject: | Re: Carambola and 1-wire |
patch file is empty... |
Author: | Sprite_tm [ 27 Mar 2012, 20:18 ] |
Post subject: | Re: Carambola and 1-wire |
Hmm, that's not right... moment, I'll see if I can find out what went wrong... |
Author: | Sprite_tm [ 27 Mar 2012, 20:28 ] |
Post subject: | Re: Carambola and 1-wire |
Ok, no idea why the file ended up being zero-bytes, but I re-diffed and re-uploaded; it should be OK now. |
Author: | tgdavies [ 25 Apr 2012, 12:35 ] |
Post subject: | Re: Carambola and 1-wire |
I got this working too, thanks to your instructions. My kernel seems to be linux-3.2.13, not the linux-2.6.39.4 you mention, but the patch still applied and works (with a pair of DS1820s). Am I misinterpreting the version number somehow? Tom |
Author: | Sprite_tm [ 25 Apr 2012, 16:08 ] |
Post subject: | Re: Carambola and 1-wire |
That's possible, perhaps they've updated the git repo. I'll take a look at it when I have the time. |
Author: | ssozonoff [ 05 Jun 2012, 22:16 ] |
Post subject: | Re: Carambola and 1-wire |
Hi All, Currently testing with a DS1990A and the latest kernel but no luck so far The iButton is not seen by the Carambola. I will keep hammering away at it. BTW any reason you went for 3.3v instead of 5v ? Serge |
Author: | Sprite_tm [ 05 Jun 2012, 23:21 ] |
Post subject: | Re: Carambola and 1-wire |
Hmm, I'll try to check it out with the new kernel when I'm done with the LCD driver. I've connected it to 3.3V because iirc the Carambolas inouts aren't 5V compatible. |
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