How can I access the USB drivers, USBMap, and Listen a USB port on osX?

I'm wondering how I could access the USB (via C, objective C), and listen what's going on, on my USB port.

I already used the tool USB Prober located at /Developer/Applications/Utilities/ but I'd like 开发者_StackOverflow中文版to go a bit more deeper in the practice.

I don't find anything really interesting on the USB programming on mac, and how to modify the drivers/kernel to listen the communications between a USB device and the USB core.

Does someone have any interesting informations ?

Thanks in advance.

Regards

Although I would recommend that you get yourself a decent hardware analyzer, you could try installing the debug version of IOUSBFamily, which combined with the USB Prober and usbtracer (included in USB Prober, do note that it only outputs a limited amount of data, 8 bytes on 32 bit systems, 16 on 64 bit systems) should probably give you more information than you really want.

You may also be able to modify and rebuild IOUSBFamily (note, link points to latest version, but you should probably use the one matching your kernel) to dump larger quantities of data than what you currently get from usbtracer.