| """Utility class representing the spec for a USB device. |
| |
| The file cfm_usb_devices.py lists all known USB device specs. |
| """ |
| |
| class UsbDeviceSpec(object): |
| """Utility class representing the spec for a CfM USB device.""" |
| |
| # Dictionary of all UsbDeviceSpec instance that have been created. |
| # Mapping from vid_pid to UsbDeviceSpec instance. |
| _all_specs = {} |
| |
| def __init__(self, vid, pid, product, interfaces): |
| """ |
| Constructor. |
| |
| @param vid: Vendor ID. String. |
| @param pid: Product ID. String. |
| @param product: Product description. String |
| @param interfaces: List of strings |
| """ |
| self._vid = vid |
| self._pid = pid |
| self._product = product |
| self._interfaces = interfaces |
| self.__class__._all_specs[self.vid_pid] = self |
| |
| @classmethod |
| def get_usb_device_spec(cls, vid_pid): |
| """Looks up UsbDeviceSpec by vid_pid.""" |
| return cls._all_specs.get(vid_pid) |
| |
| @property |
| def vendor_id(self): |
| """Returns the vendor id for this USB device.""" |
| return self._vid |
| |
| @property |
| def product_id(self): |
| """Returns the product id for this USB device.""" |
| return self._pid |
| |
| @property |
| def vid_pid(self): |
| """Return the <vendor_id>:<product_id> as a string.""" |
| return '%s:%s' % (self._vid, self._pid) |
| |
| @property |
| def product(self): |
| """Returns the product name.""" |
| return self._product |
| |
| @property |
| def interfaces(self): |
| """Returns the list of interfaces.""" |
| return self._interfaces |
| |
| def __str__(self): |
| return self.__repr__() |
| |
| def __repr__(self): |
| return "%s (%s)" % (self._product, self.vid_pid) |
