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Dallas 1 wire device interfacing with owfs
This article explains how to install the owfs in the FOX board SDK to interface Dallas 1 wire devices
Article under construction
What is 1-wire ?
"1-Wire is a computer bus system designed by Dallas Semiconductor that provides low-speed data, signaling
and power over a single wire. 1-Wire is similar in concept to I2C, but with lower data rates and a much
lower cost (http://en.wikipedia.org/wiki/1-Wire)
 1-Wire bus is a copyright of Dallas Semiconductor please access to 1-wire home page
(http://www.maxim-ic.com/1-Wire.cfm)
for more info.
What is owfs ?
Owfs is a method under linux to allow 1-wire devices to appear like files in a directory.
You can then enter a command like "cat */temperature" to have all the temperatures sensors
measure and print their data. For instance, the collection of temperature sensors above are
all on one bus, individually addressable, and will reconfigure on the fly as items are
added or removed.
Owfs is a project of Paul H. Alfille and The owfs Team please access
to Owfs home page (http://owfs.sourceforge.net/)
for more info.
Ho to install owfs in the FOX board SDK
- Read Configure the Phrozen SDK to install the FOX Board SDK
- Download tar-files from http://home.mag.cx/fox/source/
then:
patch -p1 < /path/fox_owfs_diff.txt
cp /path/packages-apps-owfs-R1_0_0.tar.gz distfiles/
cp /path/packages-apps-owfs-R1_0_0.tar.gz.md5 distfiles/
cp /path/apps-owfs-IR2_2_0-1.tar.gz distfiles/
cp /path/apps-owfs-IR2_2_0-1.tar.gz.md5 distfiles/
cp /path/apps-fuse-IR2_4_1-1.tar.gz distfiles/
cp /path/apps-fuse-IR2_4_1-1.tar.gz.md5 distfiles/
cp /path/apps-kmod-fuse-IR2_4_1-1.tar.gz distfiles/
cp /path/apps-kmod-fuse-IR2_4_1-1.tar.gz.md5 distfiles/
- Enable general->owfs, fuse, kmod-fuse and save config
make menuconfig
- Delete all old compiled owfs and fuse binaries
rm -rf apps/owfs* apps/fuse* apps/kmod-fuse* packages/apps/owfs*
./configure
make
- Flash the FOX card with the generated image called "fimage". Read How to reflash a FOX Board
- Start owserver, owhttpd and owfs with the script run-owfs
run-owfs
Using /lib/modules/2.4.31/fuse.o
ls -l /tmp/1wire/
drwxr-xr-x 1 root root 1 Nov 7 10:59 10.061847000800
drwxr-xr-x 1 root root 1 Nov 7 10:59 10.1A9246000800
drwxr-xr-x 1 root root 1 Nov 7 10:59 10.233B40000800
drwxr-xr-x 1 root root 1 Nov 7 10:59 10.2BD346000800
drwxr-xr-x 1 root root 1 Nov 7 10:59 10.4D8746000800
drwxr-xr-x 1 root root 1 Nov 7 10:59 10.5D1947000800
drwxr-xr-x 1 root root 1 Nov 7 10:59 10.6D0150000800
drwxr-xr-x 1 root root 1 Nov 7 10:59 10.762047000800
drwxr-xr-x 1 root root 1 Nov 7 10:59 10.A22840000800
drwxr-xr-x 1 root root 1 Nov 7 10:59 10.B3E166000800
drwxr-xr-x 1 root root 1 Nov 7 10:59 10.E2C746000800
drwxr-xr-x 1 root root 1 Nov 7 10:59 10.E54347000800
drwxr-xr-x 1 root root 1 Nov 7 10:59 1F.7DC202000000
drwxr-xr-x 1 root root 1 Nov 7 10:59 FF.720200000100
drwxr-xr-x 1 root root 1 Jan 1 2000 bus.0
drwxr-xr-x 1 root root 1 Jan 1 2000 settings
drwxr-xr-x 1 root root 1 Jan 1 2000 statistics
drwxr-xr-x 1 root root 1 Jan 1 2000 structure
drwxr-xr-x 1 root root 1 Jan 1 2000 system
drwxr-xr-x 1 root root 1 Jan 1 2000 uncached
cat /tmp/1wire/10.2BD346000800/temperature
18.125
It should also be possible to visit the URL http://192.168.0.90:3001/ to see the devices through owhttpd which listens to port 3001.
Thanks to Christian Magnusson for the owsf porting on the FOX Board
(http://home.mag.cx)
for more info.
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