Am Dienstag, 16. August 2011, 14:11:49 schrieb Paul Alfille:
> Did you know that --usb=ALL and --i2c=ALL:ALL will do the scanning for you?
>
Yes, but only in the back of my mind. That function isn't exactly what I need.
I do this scanning once on application start. Then I have a list of host
adapters to use.
The idea is: whenever something bad happens owfs can't handle on it's own, I
can drop all connections and immediately reconnect, without having to scan
again. In the past, this was neccessary from time to time, e.g. with USB
errors. I don't know if the situation got better, as I hadn't the time to look
for onewire the past year. Second, I have to spare some serial ports that are
known to be occupied, e.g. by touchscreen, printer interface etc.
If there was another possiblity to find out which host adapters are in use, I
would find that useful, too. Something like
"bus.2/interface/settings/serial/device" returning "ttyS0" or major/minor
> I think the serial hasn't actually hung, it's just a very long sequence
> (minutes). The code certainly wasn't tuned for efficiently finding bad
> port, but rather finding the right settings for configuration problems. So
> there is a long timeout for each attempt (5 seconds) and we try many times
> with both harware flow control and not.
>
That was my, impression, too. If we could shorten the overall process to 5s
per port, I would be happy. Is it really neccessary to wait so long for an
answer from the host adapter? No faster way just to probe if it is there?
> We could have a "quick test" option, or even better, a little utility that
> just tests whether a serial bus master is available. (just tries and
> returns the answer, could even try the ports in parallel).
>
I'd like to do this with the language binding rather than with an external
utility if I had the choice.
Kind regards
Jan
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