[sane-devel] Reflecta ProScan / Crystalscan 7200 PIE film scanner update

[Klaus Kaempf]

Hi Michael,

* Michael Rickmann <mrickma at gwdg.de> [Sep 13. 2012 18:21]:
> Am 13.09.2012 14:38, schrieb Klaus Kaempf:

> >Cranking up the debug level revealed a 'read' request issued without
> >the scanner indicating availabilty of data. The the scanner hung and I
> >had to power-cycle it.
> >
> >
> >Klaus
> Does that happen during scanimage -L?

Yes.

> Without seeing the debug output I can only guess. Worst case is that your scanner has stalled
> at the initial INQUIRY command.

No, thats not the case. Initial negotiating and calibrating is fine
untile the actual scan starts.

>From what I found out by reading the USB trace, the SCSI status bytes
clearly indicates if there's data available to read or not.

However, the current code issued a usb read request without the status
byte indicating availability of data.
I'll do further testing over the weekend and will publish my findings
here.


Regards,

Klaus
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