diff options
Diffstat (limited to 'plugins')
| -rw-r--r-- | plugins/rfid_plugin.py | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/plugins/rfid_plugin.py b/plugins/rfid_plugin.py new file mode 100644 index 0000000..acf0cad --- /dev/null +++ b/plugins/rfid_plugin.py @@ -0,0 +1,144 @@ +#!/usr/bin/env python +#Copyright (C) 2010 Emiliano Pastorino <epastorino@plan.ceibal.edu.uy> +#Copyright (c) 2011 Walter Bender + +#Permission is hereby granted, free of charge, to any person obtaining a copy +#of this software and associated documentation files (the "Software"), to deal +#in the Software without restriction, including without limitation the rights +#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +#copies of the Software, and to permit persons to whom the Software is +#furnished to do so, subject to the following conditions: + +#The above copyright notice and this permission notice shall be included in +#all copies or substantial portions of the Software. + +#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +#THE SOFTWARE. + +import os + +from gettext import gettext as _ + +from rfid.rfidutils import strhex2bin, strbin2dec, find_device + +from plugin import Plugin +from TurtleArt.taconstants import PALETTES, PALETTE_NAMES, BOX_STYLE_MEDIA, \ + CONTENT_BLOCKS, BLOCK_NAMES, DEFAULTS, SPECIAL_NAMES, HELP_STRINGS, \ + BOX_STYLE +from TurtleArt.talogo import VALUE_BLOCKS, MEDIA_BLOCKS_DICTIONARY, \ + PLUGIN_DICTIONARY + +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(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 camera-specific blocks + if self._self_test(): + PALETTES[PALETTE_NAMES.index('sensor')].append('rfid') + BOX_STYLE.append('rfid') + BLOCK_NAMES['rfid'] = [_('RFID')] + HELP_STRINGS['rfid'] = _("read value from RFID device") + PRIMITIVES['rfid'] = 'rfid' + VALUE_BLOCKS.append('rfid') + PLUGIN_DICTIONARY['rfid'] = self.prim_read_rfid + self._parent.lc._def_prim('rfid', 0, + lambda self: PLUGIN_DICTIONARY['rfid'](True)) + + def stop(self): + # Ths gets called by the stop button + pass + + def _self_test(self): + print '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 + + # Block primitives used in talogo + + def prim_read_rfid(self): + if self._self_test(): + return self.rfid_idn |