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]
