Re: Image Capture SDK Questions

• Subject: Re: Image Capture SDK Questions
• From: Stefan Hanshans <email@hidden>
• Date: Wed, 16 Feb 2005 19:35:05 +0100
• Delivered-to: email@hidden
• Delivered-to: email@hidden

Stefan,

You are sending too much data.  You only need to send 2 bytes.


        buf = malloc( 2 + sizeof(PTPPassThroughPB) - 1 );        


        ...            

            passThroughPB->dataSize = 2;

        ...            

            msgPB.message.dataSize = 2 + sizeof(PTPPassThroughPB) - 1;


--Dino

On Feb 15, 2005, at 2:13 PM, Stefan Hanshans wrote:


Hello Dino,

Since I have found no documentation about the pass through mode, I  could not figure out how the PTPPassTroughPB structure should be filled for successfully setting properties and always get error 0x4051. 

Getting properties or property descriptions is no problem.

This is what I tried (of course without success):

        buf = malloc( 1024 + sizeof(PTPPassThroughPB) );        

        if ( buf )

        {

            passThroughPB = (PTPPassThroughPB *)buf;

            memset( buf, 0, 1024 + sizeof(PTPPassThroughPB) );

            passThroughPB->commandCode = kSetDeviceProp;

            passThroughPB->numOfInputParams = 1;

            passThroughPB->params[0] = 0xD00A;//CANON_FlashMode;

            passThroughPB->numOfOutputParams = 0;

            passThroughPB->dataUsageMode = kPTPPassThruSend;

            

            passThroughPB->dataSize = 1024;

            memset( &msgPB, 0, sizeof( ICAObjectSendMessagePB ) );

            msgPB.object                = curDevice;

            msgPB.message.messageType    = kICAMessageCameraPassThrough;

            msgPB.message.startByte        = 0;

            msgPB.message.dataPtr        = buf;

            msgPB.message.dataSize        = 1024 + sizeof(PTPPassThroughPB);

            msgPB.message.dataType        = kICATypeData;

            

            err = ICAObjectSendMessage( &msgPB, NULL );

            

            free( buf );

        }

Where do I have to put the data I'm sending in? And where the data type? Do you have an example for me?

Thanks

Stefan

Am 15.02.2005 um 22:34 schrieb Dino Tang:

Hi Stefan,

The PTPPassThrough mechanism is there to do exactly what you were asking for.  We have a sample app in the SDK that demonstrates the pass through mechanism.  You should be able to do anything that the device supports via the pass through mechanism.

Cheers.

--Dino

On Feb 15, 2005, at 9:28 AM, Stefan Hanshans wrote:

I've found out how to read device properties using the sample PTPPassThroughTester application, but how can I set properties?

Is this possible with the PTPPassTroughPB structure defined in the file PTP.h of the sample code?

If so, which values have to be set, if I, for example, would like to set the property FlashMode (0xD004) of a Canon PowerShot camera to value 0x02 of type UInt8 (0x0002)?

 _______________________________________________

Do not post admin requests to the list. They will be ignored.

Usb mailing list      (email@hidden)

Help/Unsubscribe/Update your Subscription:

http://lists.apple.com/mailman/options/usb/email@hidden


This email sent to email@hidden

 _______________________________________________
Do not post admin requests to the list. They will be ignored.
Usb mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/usb/email@hidden

This email sent to email@hidden

• Follow-Ups:
  • Re: Image Capture SDK Questions
    • From: Dino Tang <email@hidden>

• Prev by Date: Re: Image Capture SDK Question
• Next by Date: Re: Image Capture SDK Questions
• Previous by thread: Re: Image Capture SDK Questions
• Next by thread: Re: Image Capture SDK Questions
• Index(es):
  • Date
  • Thread