On 1/28/03 8:59 PM, Greg Hulands wrote:
> When I do the following:
> result = (*_device)->GetConfigurationDescriptorPtr(_device, 0,
> &configDesc);
> I get the following error:
> IOUSBDeviceClass::GetConfigurationDescriptorPtr cache was INVALID
>
> Can some one tell me what this means and how to overcome it.
What is "result" after you called it? That's what you should go by, not by
anything that is printed in the console. In this case, it looks like we
left some debugging printf() in our code. All that is saying is that we had
not cached the descriptor beforehand, so we'll try again. The result of
that call is what is important.
IOUSBDeviceClass::GetConfigurationDescriptorPtr(UInt8 index,
IOUSBConfigurationDescriptorPtr *desc)
{
IOReturn kr = kIOReturnSuccess;
connectCheck();
if (index >= fNumConfigurations)
return kIOUSBConfigNotFound;
if ( !fConfigDescCacheValid )
{
printf("IOUSBDeviceClass::GetConfigurationDescriptorPtr cache was
INVALID\n");
kr = CacheConfigDescriptor();
}
*desc = fConfigurations[index];
return kr;
}
--
Fernando Urbina mailto:email@hidden
USB Technology Team work: 719.534.9387
Apple Computer, Inc. fax: 719.532.0981
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