[Libusb-devel] libusb does not find device on MAC OS X

[Hugo S. <hugosg@u.washington.edu>]

Guys,
I did significant progress during last night, I am happy
1) I sniff my device under windows and I found out that the  
communications protocol is pretty simple.
2) I manage to talk with my device using libusb with my windows  
computer using a hava wrapper for libusb -javalibusb-
3) I compile and install libusb for my Mac PPC 1.5
4) I compile and install the java wrapper on the Mac

The device is being recognized by the computer because on my System  
Profiler I can see it

Communication Device:

   Product ID:	0x6119
   Vendor ID:	0x03eb  (Atmel Corporation)
   Version:	0.01
   Speed:	Up to 12 Mb/sec
   Location ID:	0x0b200000
   Current Available (mA):	500
   Current Required (mA):	100

However When I list the USB devices with libusb I can see to normal  
devices -mouse, keyboard, etc...- but not my little USB Dongle.

Should I mount the device is some way?
Am I forgetting something?
Can somebody help me?

It would be greatly appreciate it.

Warm regards

Hugo


On May 16, 2009, at 1:47 PM, Peter Stuge wrote:

> Hugo Solis wrote:
>> Thanks so much for you quick response. I really appreciate it.
>
> You're welcome! Thanks for coming back on list so that others can
> help you better, and so that replies will be available in archives
> for your followers!
>
>
>>> libusb is not active in this regard. Recognition happens in the
>>> operating system kernel and the USB support there.
>>
>> Do you mean that I still need a driver for the device I am using.
>
> No, not beyond the general USB support in the system.
>
>
>> It's seems -or at least I have not found after hours and hours- a
>> driver for the usb chip that my device is using. I tough  libusb
>> could replace it.
>
> libusb is never a 1:1 replacement for a kernel driver, but maybe it
> will be suitable for you!
>
>
>> How can I know if my device is been recognized by the Mac computer.
>> I guess it is because people manage to use it on Mac.
>
> It should be recognized. Maybe look for it in "About this Mac" and
> the device listing available there.
>
>
>>> At best you will be able to communicate with the device by writing
>>> an application that utilizes libusb.
>>
>> I am fine writing the application using libusb -I will use
>> Javalibusb- but once that I have access to the device I do not know
>> what to send to it if it's expecting a serial protocol. Maybe I am
>> totally confuse.
>
> Ah yes! This is the key.
>
> We have no idea what protocol the device expects. The fact that it
> shows up as a serial device in some operating systems unfortunately
> does not mean anything, because the kernel drivers in those systems
> can communicate in any way with the device via USB.
>
> Maybe you can look to the Linux/BSD communities for more information
> about the particular device?
>
> Or even the vendor itself? Maybe the Raven documentation details the
> USB communication used by the device and/or it's firmware?
>
> Recommend looking at the USB specification if you end up writing a
> libusb application (directly or through wrapper) because there are
> some things that need to be right, and vendor documentation is not
> always helpful enough, so getting everything correct requires good
> understanding of the several USB protocol layers, as well as lots of
> trial and error.
>
> But once every now and then, vendors surprise you and have made
> simple and efficient designs with good documentation. Maybe you're
> one of the lucky few - it could happen! :)
>
>
> //Peter
>
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