Re: Problem with Polar IR USB Adaptor

• Subject: Re: Problem with Polar IR USB Adaptor
• From: Greg Hulands <email@hidden>
• Date: Fri, 31 Jan 2003 18:52:54 +1000

Greg

On Friday, January 31, 2003, at 11:23 AM, David Ferguson wrote:

I'm sorry to take so long to respond to this. We've looked at this device previously and it is seriously non-compliant with the USB Spec. Until it's firmware is compliant with the Chapter 9 of the USB spec, it's pretty much hopeless to get it working on the Mac.

David Ferguson
USB Software Team

At 9:21 AM -0700 1/30/03, Fernando Urbina wrote:

On 1/29/03 9:38 PM, Greg Hulands wrote:

 +-o IOUSBDevice@1120000  <class IOUSBDevice>
    | |         | {
    | |         |   "bDeviceSubClass" = 0
    | |         |   "bcdDevice" = 277
    | |         |   "idVendor" = 3492
    | |         |   "IOUserClientClass" = "IOUSBDeviceUserClient"
    | |         |   "iManufacturer" = 1
    | |         |   "Device Speed" = 0
    | |         |   "sessionID" = 12694652450568
    | |         |   "locationID" = 17956864
    | |         |   "iProduct" = 2
    | |         |   "bDeviceProtocol" = 0
    | |         |   "bDeviceClass" = 0

This is a composite device. What I would think is happening is that the
device is failing to return the configuration descriptor when we ask for it.
That is why you get an error and the composite driver does not load against
it, as it gets the same error. A bus trace would be most useful in further
debugging this, I'm sorry to say. When asking for the full config
descriptor, we first ask for 4 bytes so that we get the length of the config
descriptor and then we use that length to get the full config descriptor.
Some devices had problems with that, even though it's completely legal. A
bus trace will tell us exactly what's going on.


--
Fernando Urbina mailto:email@hidden
USB Technology Team work: 719.534.9387
Apple Computer, Inc. fax: 719.532.0981
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