[sane-devel] USB recordings MD6190 available

[Lauri Pirttiaho]

Lauri Pirttiaho on Mon Sep 26 18:25:44 UTC 2005
>Bertrik Sikken on Sun Sep 25 20:35:55 UTC 2005
>>Lauri Pirttiaho wrote:
>>> -- value 0040 returns state of a state machine driven by ie1 as its
>>>    first byte and I suspect that state machine to be the motor control.
>>>    The second byte is port 1 bit 0 which I suspect to be he head home
>>>    detector. Additionally there are 3 more bytes of info (I con't
>>>    know the meaning of these yet), 0xAA and then 0's.
>>
>>I noticed some increasing number at bytes 2 and 3 and suspect that
>>this is the current line number of the carriage.
>
>That, too, may be different from the CanoScan one...

Bytes 2 and 3 are a counter in ie1 handler. That counter is used
to trigger events in the state machine and it goes steadily up and
down in certain states interrupt-by-interrupt. I believe Bertrik's
interpretation is correct. Confirmation comes from checking the
trigger values against known parameters (e.g. in value 0030 command
-- the scan command).

With best regards,

Lauri Pirttiaho
Oulu
Finland


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