Raspberry Pi speaks 1-wire with Adafruit's Occidentalis image

RE: Raspberry Pi speaks 1-wire with Adafruit's Occidentalis image

e14 Contributor — Thu, 30 Aug 2012 21:19:46 GMT

Hello Drew,

Thanks, you're right, it is GPIO4 which is in fact Pin 7, sorry for the mistake [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-49a775f9-6730-4a02-a17a-48c2014f4dc7/contentimage_5F00_1.png:16:16]

Thank you for your support.

RE: Raspberry Pi speaks 1-wire with Adafruit's Occidentalis image

e14 Contributor — Thu, 30 Aug 2012 20:23:10 GMT

Hello,

I've managed to get DS18B20 sensors working correctly with Occidentalis image but I needed to connect Data to GPIO #7 instead of GPIO #4, is there an error in the adafruit instructions?

Thank you for your support,

Fabrice FAURE

RE: Raspberry Pi speaks 1-wire with Adafruit's Occidentalis image

daloele — Fri, 10 Aug 2012 11:39:14 GMT

Anyone interested in 1-wire ought to be aware of owfs, a long-running project supporting 1-wire networks. People have reported running it on a raspberry pi.

RE: Raspberry Pi speaks 1-wire with Adafruit's Occidentalis image

e14 Contributor — Thu, 09 Aug 2012 09:34:21 GMT

here is the "lsmode"" and "dmesg | tail -20" messages.

[View:/resized-image/__size/618x899/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-49a775f9-6730-4a02-a17a-48c2014f4dc7/contentimage_5F00_174995.jpg:618:899]

and proof, that it's connected fine, Raspbian + Frank Buss kernel, 2 sensors connected

[View:/resized-image/__size/675x425/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-49a775f9-6730-4a02-a17a-48c2014f4dc7/contentimage_5F00_174996.jpg:675:425]

RE: Raspberry Pi speaks 1-wire with Adafruit's Occidentalis image

fustini — Thu, 09 Aug 2012 07:56:53 GMT

I tried to use the sensors utility to read the I2C TMP102, but this did not work in Adafruit's image:

[View:/resized-image/__size/1440x852/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-49a775f9-6730-4a02-a17a-48c2014f4dc7/contentimage_5F00_174992.png:1440:852]

I then booted with bootc.net's image and was able to run sensors (see: Temperature sensing with the Raspberry Pi):

[View:/resized-image/__size/752x579/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-49a775f9-6730-4a02-a17a-48c2014f4dc7/contentimage_5F00_174993.png:752:579]

Booting again with the Adafruit image, I was able to verify the temperature reported by the 1-wire DS18B20 was very close to the I2C TMP102:

[View:/resized-image/__size/752x579/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-49a775f9-6730-4a02-a17a-48c2014f4dc7/contentimage_5F00_174994.png:752:579]

RE: Raspberry Pi speaks 1-wire with Adafruit's Occidentalis image

morgaine — Wed, 08 Aug 2012 22:50:09 GMT

It was very interesting for me to see your article Drew, as I've had a soft spot for 1-Wire and iButtons since the early 90's and have lots of such devices here, mostly early serial number and storage iButtons.

I use one of these USB-to-1-wire bridge dongles -- http://uk.farnell.com/maxim-integrated-products/ds9490r/ic-bridge-usb-to-1-wire-rj11/dp/2095867 -- which interfaces to 1-wire through an RJ11 connector, but it's been on my mind to interface an ARM to the 1-wire bus directly as it's an ideal marriage.

Your article will be a nice push in that direction! [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-49a775f9-6730-4a02-a17a-48c2014f4dc7/contentimage_5F00_403.png:16:16]

Morgaine.

RE: Raspberry Pi speaks 1-wire with Adafruit's Occidentalis image

e14 Contributor — Wed, 08 Aug 2012 21:05:11 GMT

Hi, I'm don't now Raspberry pi and Linux enought yet.

1-wire communication is not working to me, and I don't know why.

Under Raspbian with Frank Buss kernel everything works fine (temperature sensor DS18B20), but if I try Adafruit's Occidentalis image, then it's not working and I really don't know where is the problem.

[View:/resized-image/__size/674x582/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-49a775f9-6730-4a02-a17a-48c2014f4dc7/contentimage_5F00_174991.jpg:674:582]