Re: [gphoto-devel] Canon PowerShot A520

[Hans v. D. <do...@xs...>]

Marcus Meissner wrote:

>On Sun, Oct 30, 2005 at 07:48:56PM +0100, Hans van Dok wrote:
>
>>Hello
>>
>>I am the happy owner of a Canon PowerShot A520. gphoto2 can get pictures 
>>from it just fine, and that's the most important bit to me, but it 
>>doesn't identify the camera properly, which I suppose is why it can't do 
>>other things such as "capture".
>>
>>As noted before on gphoto-user in the thread that started here
>>
>> <http://sourceforge.net/mailarchive/message.php?msg_id=12936726>
>>
>>there seems to be a problem with the product ID, but that thread has 
>>fizzled out somehow. Apparently the required information to support this 
>>camera is the product ID which can be found in the output of "cat 
>>/proc/bus/usb/devices"
>>
>>T:  Bus=01 Lev=01 Prnt=01 Port=09 Cnt=02 Dev#= 36 Spd=12  MxCh= 0
>>D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=32 #Cfgs=  1
>>P:  Vendor=04a9 ProdID=30c1 Rev= 0.01
>>S:  Manufacturer=Canon Inc.
>>S:  Product=Canon Digital Camera
>>C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=100mA
>>I:  If#= 0 Alt= 0 #EPs= 3 Cls=06(still) Sub=01 Prot=01 Driver=(none)
>>E:  Ad=81(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
>>E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
>>E:  Ad=83(I) Atr=03(Int.) MxPS=   8 Ivl=96ms
>>
>>I hope this is enough to get full support for this camera in gphoto2. If 
>>anyone wants me to test anything with my camera or needs more 
>>information I'd be glad to try and help.
>>
>
>It is. Thanks!
>
>It should even work fully only when reported as "USB PTP Camera", the id addition
>does not add functionality besides the name.
>
>Ciao, Marcus
>
>
Marcus,

Glad to be of some assistance!

Some more information (possibly):

When using the "default" libgphoto2 2.1.6, it gets reported as a Canon 
Digital IXUS 50 when I use "gphoto2 --auto-detect".  Then, if I try 
"gphoto2 --capture-picture" it says it "Detected a 'Canon:PowerShot 
SD400 (normal mode)'".  They are the same thing, but it's still a bit 
odd in itself.  Anyhow; using it, I was unable to get it to "capture" an 
image.

So, I messed with the source just a tiny bit (not being much of a 
programmer at all, I must admit), adding this line to canon.c:

        {"Canon:PowerShot A520 (normal mode)",  CANON_CLASS_1,  0x04A9, 
0x30c1, CAP_SUP, SL_MOVIE_LARGE, SL_THUMB, SL_PICTURE, NULL},

This made "capture" work somewhat --- that is, when I turned the cam on 
after connecting it and issuing "gphoto2 --camera "Canon PowerShot A520 
(PTP Mode)" --capture-image" it works, but I got some flaky performance 
(I think), in that whenever I forget to include the --camera argument, 
afterwards it won't work anymore and return errors of this kind:

--

gp_port_write: Resource temporarily unavailable
gp_port_write: Resource temporarily unavailable

*** Error ***
PTP I/O error

*** Error ***
An error occurred in the io-library ('Unspecified error'): Could not 
query kernel driver of device.
ERROR: Could not capture.
*** Error (-1: 'Unspecified error') ***
--
(etc.)

So, uhm, I hope that is of some use to you all.

Hans