[sane-devel] Epson 2480 Transparency Unit - not for me 8-(

[Oliver Schwartz]

On Tuesday 16 August 2005 21:03, Reinald Kirchner wrote:
> Hi everybody,
> I replaced the firmware 1.14 with the 1.16 I received (thanks Simon
> and Ken), but I have no change in the behaviour of my scanner. When
> I address the transparency unit, it runs into a loop. The debug
> ends repeating the attached block below over and over.
>
> Any Ideas, any advice?

Not really. The backend tries to set the scanning parameters (command 
0x24). The scanner replies with an error, the backend requests the 
error code, the scanner replies that it is warming up and will be 
finished in 4 seconds. The backend then waits for 4 seconds and 
repeats the command, but the scanner always gives the same answer.

One possibility is to ignore the return value completely. You could 
try changing the loop at the end of set_window() in snapscan-scsi.c, 
i.e. replace 

    do {
        status = snapscan_cmd (pss->pdev->bus, pss->fd, pss->cmd,
                  SET_WINDOW_TOTAL_LEN, NULL, NULL);
        ...
    } while (status == SANE_STATUS_DEVICE_BUSY);
    CHECK_STATUS (status, me, "snapscan_cmd");
    return status;
}

with 

    snapscan_cmd (pss->pdev->bus, pss->fd, pss->cmd,
                  SET_WINDOW_TOTAL_LEN, NULL, NULL);
    return SANE_STATUS_GOOD;


Then run
touch snapscan.c
make 
make install

Hope this helps,

/Oliver