I’m guessing that is indeed the problem. Does one do that with certain options to IOCreatePlugInInterfaceForService()? -Carl
On Dec 15, 2014, at 3:44 PM, Fernando Urbina <[email protected]> wrote: > Are you creating the appropriate IOUSBDeviceInterface? You need to create > one that matches the version where USBDeviceReEnumerate was intro’d: > > kIOUSBDeviceInterfaceID187 > > > > >> On Dec 15, 2014, at 3:37 PM, Carl Hoefs <[email protected]> >> wrote: >> >> Thanks for the pointer. Yes, this is from within a user-mode OS X app. I can >> do everything successfully but call the USBDeviceReEnumerate() function. >> >> In a nutshell, I iterate through IOIteratorNext(): >> If there is a match of vid/pid: >> invoke IORegistryEntryGetName() >> invoke IORegistryEntryGetPath() >> invoke IORegistryEntryCreateCFProperties() >> invoke IOCreatePlugInInterfaceForService() >> invoke QueryInterface() to get the device interface >> (all of the above works successfully) >> and then try to invoke USBDeviceReEnumerate(), which seems to exist in the >> Twilight Zone. >> >> But Xcode doesn’t resolve the function. I can manually place a function >> prototype in my code to get it to build, but at runtime, when it invokes >> USBDeviceReEnumerate(), it crashes with a EXC_BAD_ACCESS due to the >> function’s unresolved address being 0x00000000. This happens both on 10.9 >> and 10.10 systems. >> >> If there were sample code that actually invoked USBDeviceReEnumerate(), that >> would be great. Somehow it appears to exist, but just beyond my reach… >> >> -Carl >> >> >> On Dec 15, 2014, at 3:10 PM, Fernando Urbina <[email protected]> wrote: >> >>> You need to take a look at some of the sample code in order to understand >>> how to use IOUSBLib.h. This is one of my favorite sample code snippets: >>> >>> https://developer.apple.com/library/mac/samplecode/USBPrivateDataSample/Introduction/Intro.html >>> >>> >>> >>> Woof, >>> >>> Nano Urbina >>> Build Slave >>> Razz Software >>> http://www.razzsoftware.com >>> >> > _______________________________________________ Do not post admin requests to the list. They will be ignored. Usb mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/usb/archive%40mail-archive.com This email sent to [email protected]
