G'Day,
> As I understand you have copied ow_ds9097.c and made your changes to it.
> DS9097_reset() send a resetbyte 0xF0 and read a byte. If received byte
> is 0xF0, no devices where found on the bus and it's therefor no use
> to search for more devices in DS9097_next_both() where it exits later.
> If received byte is 0, the 1-wire bus has a short circuit.
> Otherwise there seem to be devices 1-wire devices to use.
>
> I guess you get a result !=0 and !=0xF0 since you make a debug output
> like: "OMAP_reset(): AnyDevices = 1" (and I suppose you return 0 from
> OMAP_reset() to indicate reset was successful)
That is correct: I have maintained that aspect as-is.
> If you start: owfs --foreground --error_level=9 --error_print=2
> -o /dev/wire /mnt/1wire
I have now tried that. --error_level and --error_print were not
recognised (they must have been added since the last release), and if I
use --foreground I end up stuck because I can only have one terminal: I
did not think about that aspect until after I tried it.
> Add debugging in ow_dir.c:FS_realdir() just after BUS_select(pn2)
> and BUS_first(sn,pn2) and make sure they both return 0, otherwise
> it will never enter the loop and list the devices on the 1-wire bus.
I added a couple of messages to that function, and it never even gets
called, let alone BUS_select()/BUS_first() getting called. Indeed, none
of the BUS_*() functions seem to get called at any time.
`ls /mnt/1wire/uncached/' does not appear to help either.
I decided to trace back, and it seems FS_realdir() is called by
FS_dir_seek(), however that function is never called either; nor is
FS_dir(). If I continue to follow the path, FS_dir() seems to only
called from owfs in FS_getdir(), which also never seems to be called.
>From what I can gather, I would have to go into FUSE to find where that
is called... so I turned my attention to where owfs gets FUSE started.
I took the following line:
if ( LibStart() ) ow_exit(1) ;
and turned it into:
testing = LibStart();
fprintf(stderr, "LibStart() returned %d", testing);
if ( testing ) ow_exit(1) ;
Interestingly enough, I never saw that output. It got to the line
before calling LibStart(), but never printed `testing', yet I could
still access parts of the file system. I know nothing about how FUSE
works, but I would have thought it would be a case of all-or-nothing.
I am rather stuck now: I had not expected to find anything like this.
Is the problem likely with FUSE as I suspect, or may it perhaps be
somewhere else?
Thanks for the assistance so far,
Matthew
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