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/rfidutils.py')

diff --git a/plugins/rfid/rfidutils.py b/plugins/rfid/rfidutils.py
new file mode 100644
index 0000000..4e02619
--- /dev/null
+++ b/plugins/rfid/rfidutils.py
@@ -0,0 +1,123 @@
+# utils.py - Helper functions for tis2000.py
+# Copyright (C) 2010 Emiliano Pastorino <epastorino@plan.ceibal.edu.uy>
+#
+# 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 3 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, see <http://www.gnu.org/licenses/>.
+
+import os
+import logging
+
+def find_device():
+    """
+    Search for devices.
+    Return a device instance or None.
+    """
+    device = None
+    for i in os.listdir(os.path.join('.', 'plugins/rfid')):
+        if not os.path.isdir(os.path.join('.', 'plugins/rfid', i)):
+            try:
+                _tempmod = __import__('rfid.%s'%i.split('.')[0], globals(),
+                                      locals(), ['RFIDReader'], -1)
+                devtemp = _tempmod.RFIDReader()
+                if devtemp.get_present() == True:
+                    device = devtemp
+            except Exception, e:
+                # logging.error("FIND_DEVICE: %s: %s"%(i, e))
+                pass
+    if device is None:
+        logging.debug("No RFID device found")
+    return device
+
+
+def strhex2bin(strhex):
+    """
+    Convert a string representing an hex value into a 
+    string representing the same value in binary format.
+    """
+    dic = { '0':"0000",
+            '1':"0001",
+            '2':"0010",
+            '3':"0011",
+            '4':"0100",
+            '5':"0101",
+            '6':"0110",
+            '7':"0111",
+            '8':"1000",
+            '9':"1001",
+            'A':"1010",
+            'B':"1011",
+            'C':"1100",
+            'D':"1101",
+            'E':"1110",
+            'F':"1111"
+    }
+    binstr = ""
+    for i in strhex:
+        binstr = binstr + dic[i.upper()]
+    return binstr
+
+def strbin2dec(strbin):
+    """
+    Convert a string representing a binary value into a 
+    string representing the same value in decimal format.
+    """
+    strdec = "0"
+    for i in range(1, strbin.__len__()+1):
+        strdec = str(int(strdec)+int(strbin[-i])*int(pow(2, i-1)))
+    return strdec
+
+def dec2bin(ndec):
+    """
+    Convert a decimal number into a string representing
+    the same value in binary format.
+    """
+    if ndec < 1:
+        return "0"
+    binary = []
+    while ndec != 0:
+        binary.append(ndec%2)
+        ndec = ndec/2
+    strbin = ""
+    binary.reverse()
+    for i in binary:
+        strbin = strbin+str(i)
+    return strbin
+
+def bin2hex(strbin):
+    """
+    Convert a string representing a binary number into a string
+    representing the same value in hexadecimal format.
+    """
+    dic = { "0000":"0",
+            "0001":"1",
+            "0010":"2",
+            "0011":"3",
+            "0100":"4",
+            "0101":"5",
+            "0110":"6",
+            "0111":"7",
+            "1000":"8",
+            "1001":"9",
+            "1010":"A",
+            "1011":"B",
+            "1100":"C",
+            "1101":"D",
+            "1110":"E",
+            "1111":"F"
+    }
+    while strbin.__len__()%4 != 0:
+        strbin = '0' + strbin
+    strh = ""
+    for i in range(0, strbin.__len__()/4):
+        strh = strh + dic[str(strbin[i*4:i*4+4])]
+    return strh
--
cgit v0.9.1