adding rfid support

1 files changed, 61 insertions, 0 deletions

diff --git a/devices/device.py b/devices/device.py
new file mode 100644
index 0000000..04a82b2
--- /dev/null
+++ b/devices/device.py
@@ -0,0 +1,61 @@
+import gobject
+
+class RFIDDevice(gobject.GObject):
+    """
+    Ancestor class for every supported device.
+    The main class for the device driver must be called "RFIDReader".
+    """
+    # signal "tag-read" has to be emitted when a tag has been read.
+    # The handler must receive the ISO-11784 hex value of the tag.
+    # signal "disconnected" has to be emitted when the device is
+    # unplugged or an error has been detected.
+    __gsignals__ = {
+        'tag-read': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE,
+                     (gobject.TYPE_STRING,)),
+        'disconnected': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE,
+                         (gobject.TYPE_STRING,))
+    }
+    def __init__(self):
+        """
+        Initializer. Subclasses must call this method.
+        """
+        self.__gobject_init__()
+
+    def get_present(self):
+        """
+        This method must detect if the device is present, returning True if so,
+        or False otherwise.
+        """
+        raise NotImplementedError
+
+    def get_version(self):
+        """
+        Returns a descriptive text of the device.
+        """
+        raise NotImplementedError
+
+    def do_connect(self):
+        """
+        Connects to the device.
+        Must return True if successfull, False otherwise.
+        """
+        raise NotImplementedError
+
+    def do_disconnect(self):
+        """
+        Disconnects from the device.
+        """
+        raise NotImplementedError
+
+    def read_tag(self):
+        """
+        Returns the 64 bit data in hex format of the last read tag.
+        """
+        raise NotImplementedError
+
+    def write_tag(self, hex_val):
+        """
+        Could be implemented if the device is capable of writing tags.
+        Receives the hex value (according to ISO 11784) to be written.
+        Returns True if successfull or False if something went wrong.
+        """