From c3f0e8e2bfa09e2043016e808673a8c0779e4886 Mon Sep 17 00:00:00 2001
From: Walter Bender <walter.bender@gmail.com>
Date: Thu, 07 Apr 2011 14:51:40 +0000
Subject: reorganizing plugins into separate directories; adding support for plugin palette icons in plugin directory

---
(limited to 'plugins/rfid/rfid.py')

diff --git a/plugins/rfid/rfid.py b/plugins/rfid/rfid.py
new file mode 100644
index 0000000..a83bae0
--- /dev/null
+++ b/plugins/rfid/rfid.py
@@ -0,0 +1,140 @@
+#!/usr/bin/env python
+#Copyright (C) 2010,11 Emiliano Pastorino <epastorino@plan.ceibal.edu.uy>
+#Copyright (c) 2011 Walter Bender
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+import dbus
+from dbus.mainloop.glib import DBusGMainLoop
+
+from plugins.rfid.rfidutils import strhex2bin, strbin2dec, find_device
+
+from plugins.plugin import Plugin
+
+from TurtleArt.tapalette import make_palette
+from TurtleArt.talogo import primitive_dictionary
+from TurtleArt.tautils import debug_output
+
+import logging
+_logger = logging.getLogger('turtleart-activity RFID plugin')
+
+HAL_SERVICE = 'org.freedesktop.Hal'
+HAL_MGR_PATH = '/org/freedesktop/Hal/Manager'
+HAL_MGR_IFACE = 'org.freedesktop.Hal.Manager'
+HAL_DEV_IFACE = 'org.freedesktop.Hal.Device'
+REGEXP_SERUSB = '\/org\/freedesktop\/Hal\/devices\/usb_device['\
+                'a-z,A-Z,0-9,_]*serial_usb_[0-9]'
+
+
+class Rfid(Plugin):
+
+    def __init__(self, parent):
+        self._parent = parent
+        self._status = False
+
+        """
+        The following code will initialize a USB RFID reader. Please note that
+        in order to make this initialization function work, it is necessary to
+        set the permission for the ttyUSB device to 0666. You can do this by
+        adding a rule to /etc/udev/rules.d
+
+        As root (using sudo or su), copy the following text into a new file in
+        /etc/udev/rules.d/94-ttyUSB-rules
+
+        KERNEL=="ttyUSB[0-9]",MODE="0666"
+
+        You only have to do this once.
+        """
+
+        self.rfid_connected = False
+        self.rfid_device = find_device()
+        self.rfid_idn = ''
+
+        if self.rfid_device is not None:
+            _logger.info("RFID device found")
+            self.rfid_connected = self.rfid_device.do_connect()
+            if self.rfid_connected:
+                self.rfid_device.connect("tag-read", self._tag_read_cb)
+                self.rfid_device.connect("disconnected", self._disconnected_cb)
+
+            loop = DBusGMainLoop()
+            bus = dbus.SystemBus(mainloop=loop)
+            hmgr_iface = dbus.Interface(bus.get_object(HAL_SERVICE,
+                HAL_MGR_PATH), HAL_MGR_IFACE)
+
+            hmgr_iface.connect_to_signal('DeviceAdded', self._device_added_cb)
+
+            self._status = True
+
+    def setup(self):
+        # set up RFID-specific blocks
+        if self._status:
+            palette = make_palette('sensor',
+                                   colors=["#FF6060", "#A06060"],
+                                   help_string=_('Palette of sensor blocks'))
+
+            primitive_dictionary['rfid'] = self.prim_read_camera
+            palette.add_block('rfid',
+                              palette='sensor',
+                              style='box-style',
+                              label=_('RFID'),
+                              help_string=_('read value from RFID device'),
+                              value_block=True,
+                              prim_name='rfid')
+            self._parent.lc.def_prim('rfid', 0,
+                lambda self: primitive_dictionary['rfid'](True))
+
+    def _status_report(self):
+        debug_output('Reporting RFID status: %s' % (str(self._status)))
+        return self._status
+
+    def _device_added_cb(self, path):
+        """
+        Called from hal connection when a new device is plugged.
+        """
+        if not self.rfid_connected:
+            self.rfid_device = find_device()
+            _logger.debug("DEVICE_ADDED: %s" % self.rfid_device)
+            if self.rfid_device is not None:
+                _logger.debug("DEVICE_ADDED: RFID device is not None!")
+                self.rfid_connected = self._device.do_connect()
+            if self.rfid_connected:
+                _logger.debug("DEVICE_ADDED: Connected!")
+                self.rfid_device.connect("tag-read", self._tag_read_cb)
+                self.rfid_device.connect("disconnected", self._disconnected_cb)
+
+    def _disconnected_cb(self, device, text):
+        """
+        Called when the device is disconnected.
+        """
+        self.rfid_connected = False
+        self.rfid_device = None
+
+    def _tag_read_cb(self, device, tagid):
+        """
+        Callback for "tag-read" signal. Receives the read tag id.
+        """
+        idbin = strhex2bin(tagid)
+        self.rfid_idn = strbin2dec(idbin[26:64])
+        while self.rfid_idn.__len__() < 9:
+            self.rfid_idn = '0' + self.rfid_idn
+        print tagid, idbin, self.rfid_idn
+        self.tw.lc.update_label_value('rfid', self.rfid_idn)
+
+    # Block primitives used in talogo
+
+    def prim_read_rfid(self):
+        if self._status:
+            return self.rfid_idn
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