Hi,
I'm pretty new to the owfs and have been trying to get it working properly
but have run into some issues. Basically my device (DS2431) and USB adapter
(DS9490r) will disconnect and disappear from the 1-wire file system mount
point. I'm using the python api (http://owfs.sourceforge.net/owpython.html)
At start up I run: #sudo /opt/owfs/bin/owfs --allow_other -u
/root/1-wire-EEPROM
to mount the file system. This works and shows the USB an EEPROM device
attached.
I then run the python api and the following code, and get the output below:
>>> import ow
>>> ow.init('u')
DEFAULT: ow_ds9490.c:(250) Unclear what <> means in USB specification, will
use first adapter.
DEFAULT: ow_usb_msg.c:(295) Opened USB DS9490 bus master at 1:2.
DEFAULT: ow_usb_cycle.c:(191) Set DS9490 1:2 unique id to 81 82 DE 2A 00 00
00 B9
Now, I couldn't find a function to read/write to the EEPROM in the python
api so I created my own, but at any point I try to access the EEPROM page
files inside of python they become inaccessible and can no longer be seen at
the mount point.
fileObject = open(pagePath, "rb") # Read only to a file in binary
with fileObject as f:
f.seek(offset, 0)
readVal = f.read(chunkSize)
>From the above segment of code the program breaks at the line: readVal =
f.read(chunkSize). The file system is still intact up to this line when it
suddenly dissapears. I have also observed in other cases that the file
system disappears immediately after ow.init('u') is called. Upon exiting to
the terminal I've tried
#fusermount -u /root/1-wire-EEPROM/
to reset the system, but either get the error; device or resource busy; or
fuse: mountpoint is not empty,
fuse: if you are sure this is safe, use the 'nonempty' mount option. I don't
know how to get around this. Any help with finding out why the attached
devices keep disappearing would be appreciated.
I'm using Debian on a BeagleBone Black for development. I also found this
thread, but can't seem to make it work:
http://owfs-developers.1086194.n5.nabble.com/Diagnosing-disappearing-devices-td10001.html
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