[3534] | 1 | # -*- coding: utf-8 -*- |
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| 2 | # |
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| 3 | # PyKoCard |
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| 4 | # |
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| 5 | # PyKoCard : Smart Card / Vending Card managing library |
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| 6 | # |
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| 7 | # (c) 2010 Jerome Alet <alet@librelogiciel.com> |
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| 8 | # This program is free software: you can redistribute it and/or modify |
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| 9 | # it under the terms of the GNU General Public License as published by |
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| 10 | # the Free Software Foundation, either version 3 of the License, or |
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| 11 | # (at your option) any later version. |
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| 12 | # |
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| 13 | # This program is distributed in the hope that it will be useful, |
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| 14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | # GNU General Public License for more details. |
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| 17 | # |
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| 18 | # You should have received a copy of the GNU General Public License |
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| 19 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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| 20 | # |
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| 21 | # $Id$ |
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| 22 | # |
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| 23 | |
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[3535] | 24 | import sys |
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| 25 | |
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[3537] | 26 | import serial # On Debian/Ubuntu : apt-get install python-serial |
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| 27 | |
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[3540] | 28 | # Some constants : names are mine, not Cartadis. |
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| 29 | # |
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| 30 | # Write errors |
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| 31 | NOERROR = 0 |
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| 32 | ERRWRITEERROR = -1 |
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| 33 | ERRNOCARD = -2 |
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| 34 | ERRCARDBLOCKED = -3 |
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| 35 | ERRUNKNOWNCARD = -4 |
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| 36 | ERRINVALID = -5 |
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| 37 | ERRMAXTRANSACTION = -6 |
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| 38 | ERRVALUETOOHIGH = -7 |
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| 39 | ERRGROUPNOTALLOWED = -8 |
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| 40 | ERRWRITEBEFOREREAD = -9 |
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| 41 | ERRREADBEFOREWRITE = -10 |
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| 42 | ERRCOMPARISON = -11 |
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| 43 | # |
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| 44 | # Read errors |
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| 45 | ERRREADERROR = -1 |
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| 46 | # |
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| 47 | # Other errors |
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| 48 | ERRILLEGALGROUP = -1 |
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| 49 | ERRNOTADMIN = -9 |
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| 50 | ERRLISTFULL = -10 |
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| 51 | ERRADMINNOTALLOWED = -11 |
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| 52 | |
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| 53 | |
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[3534] | 54 | class CartadisTCRS : |
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| 55 | """A class to manage Cartadis TCRS vending card readers. |
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| 56 | |
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| 57 | Documentation was found in a Cartadis TCRS reader's paper manual. |
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| 58 | |
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| 59 | Cartadis is a registered trademark from Copie Monnaie France (C.M.F.) |
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| 60 | """ |
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[3537] | 61 | def __init__(self, device, timeout=5.0, debug=False) : |
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[3540] | 62 | """Initializes the connection to the TCRS.""" |
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[3534] | 63 | self.device = device |
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| 64 | self.timeout = timeout |
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| 65 | self.debug = debug |
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| 66 | |
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[3537] | 67 | self.lastcommand = None |
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[3540] | 68 | self.sol = chr(13) + chr(10) # start of line (begins each answer) |
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| 69 | self.sollen = len(self.sol) |
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| 70 | self.prompt = chr(13) + chr(10) + '$' # the prompt |
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| 71 | self.promptlen = len(self.prompt) |
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[3536] | 72 | self.eoc = chr(13) # end of command |
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| 73 | |
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| 74 | # Each Cartadis vending card contain the following informations : |
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[3540] | 75 | self.cardcontent = { "group" : None, # the card can only be read on a TCRS for which this group number was specifically allowed. |
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| 76 | "value" : None, # the number of credits on the card. |
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| 77 | "department" : None, # these two fields can be used to identify the owner of the card |
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| 78 | "account" : None, |
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| 79 | "trnum" : None # Transaction number : Max 3000 for plastic cars, else 500. |
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| 80 | } |
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[3536] | 81 | |
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[3540] | 82 | # opens the connection to the TCRS |
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[3537] | 83 | self.tcrs = serial.Serial(device, |
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| 84 | baudrate=9600, |
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| 85 | bytesize=serial.EIGHTBITS, |
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| 86 | parity=serial.PARITY_NONE, |
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| 87 | stopbits=serial.STOPBITS_ONE, |
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| 88 | xonxoff=False, |
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| 89 | rtscts=True, |
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| 90 | timeout=timeout) |
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| 91 | |
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| 92 | # cleans up any data waiting to be read |
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[3540] | 93 | try : |
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| 94 | self.tcrs.flushInput() |
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| 95 | except serial.serialutil.SerialException, msg : |
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| 96 | self.logError(msg) |
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| 97 | self.close() |
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| 98 | else : |
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| 99 | # Identifies the terminal |
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| 100 | self.versionNumber = self.version() |
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| 101 | self.serialNumber = self.serial() |
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| 102 | self.logDebug("%s terminal detected on device %s with serial number %s" \ |
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| 103 | % (self.versionNumber, |
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| 104 | self.device, |
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| 105 | self.serialNumber)) |
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| 106 | self.supportedCommands = self.help() |
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| 107 | self.logDebug("Supported commands : %s" % self.supportedCommands) |
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[3537] | 108 | |
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[3534] | 109 | def __del__(self) : |
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| 110 | """Ensures the serial link is closed on deletion.""" |
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| 111 | self.close() |
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| 112 | |
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| 113 | def close(self) : |
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| 114 | """Closes the serial link if it is open.""" |
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[3537] | 115 | if self.tcrs is not None : |
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[3538] | 116 | self.logDebug("Closing serial link...") |
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[3537] | 117 | self.tcrs.close() |
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| 118 | self.tcrs = None |
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[3538] | 119 | self.logDebug("Serial link closed.") |
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[3534] | 120 | |
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[3540] | 121 | def logError(self, message) : |
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| 122 | """Logs an error message.""" |
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| 123 | sys.stderr.write("%s\n" % message) |
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| 124 | sys.stderr.flush() |
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| 125 | |
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[3535] | 126 | def logDebug(self, message) : |
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[3534] | 127 | """Logs a debug message.""" |
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| 128 | if self.debug : |
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[3540] | 129 | self.logError(message) |
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[3534] | 130 | |
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[3537] | 131 | def sendCommand(self, cmd, param=None) : |
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[3540] | 132 | """Sends a command to the TCRS.""" |
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| 133 | if self.tcrs is not None : |
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| 134 | if param is not None : |
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| 135 | command = "%s %s%s" % (cmd, param, self.eoc) |
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| 136 | else : |
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| 137 | command = "%s%s" % (cmd, self.eoc) |
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| 138 | self.logDebug("Sending %s to TCRS" % repr(command)) |
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| 139 | self.tcrs.write(command) |
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| 140 | self.tcrs.flush() |
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| 141 | self.lastcommand = command |
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| 142 | # |
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| 143 | # IMPORTANT : the following code doesn't work because currently |
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| 144 | # PySerial doesn't allow an EOL marker to be several chars long. |
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| 145 | # I've just sent a patch for this to PySerial's author, and we'll |
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| 146 | # see what happens. If not accepted, I'll write it another way. |
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| 147 | answer = self.tcrs.readline(eol=self.prompt) |
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| 148 | self.logDebug("TCRS answered %s" % repr(answer)) |
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| 149 | if answer.startswith(self.sol) and answer.endswith(self.prompt) : |
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| 150 | return answer[self.sollen:-self.promptlen] |
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| 151 | else : |
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| 152 | self.logError("Unknown answer %s" % repr(answer)) |
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| 153 | return None |
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[3537] | 154 | else : |
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[3540] | 155 | self.logError("Device %s is not open" % self.device) |
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[3536] | 156 | |
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[3538] | 157 | def help(self) : |
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| 158 | """Returns the list of commands supported by the TCRS.""" |
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[3540] | 159 | return self.sendCommand("help") |
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[3537] | 160 | |
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[3538] | 161 | def version(self) : |
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| 162 | """Returns the TCRS' version string.""" |
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| 163 | return self.sendCommand("version") |
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| 164 | |
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| 165 | def serial(self) : |
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| 166 | """Returns the TCRS' serial number.'""" |
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| 167 | return self.sendCommand("serial") |
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| 168 | |
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[3540] | 169 | def read(self) : |
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| 170 | """Reads the card's content to the TCRS. Returns the type of card or an error value.""" |
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| 171 | return int(self.sendCommand("read")) |
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| 172 | |
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| 173 | def write(self) : |
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| 174 | """Writes the TCRS values to the card. Returns 0 or error value.""" |
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| 175 | return int(self.sendCommand("write")) |
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| 176 | |
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| 177 | def sensor(self) : |
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| 178 | """Returns 0 if there's no card in TCRS, else 1, 2 or 3.""" |
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| 179 | return int(self.sendCommand("sensor")) |
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| 180 | |
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| 181 | def eject(self) : |
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| 182 | """Ejects the card from the TCRS.""" |
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| 183 | return self.sendCommand("eject") |
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| 184 | |
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| 185 | def trnum(self) : |
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| 186 | """Returns the number of transactions made with this card.""" |
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| 187 | return int(self.sendCommand("trnum")) |
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| 188 | |
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| 189 | def value(self, value=None) : |
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| 190 | """Returns the last value read, or sets the new value of the card, but doesn't write it to the card yet.""" |
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| 191 | if value is None : |
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| 192 | return int(self.sendCommand("value")) |
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| 193 | else : |
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| 194 | return self.sendCommand("value", value) |
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| 195 | |
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| 196 | def account(self, account) : |
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| 197 | """Returns the last account number read, or sets the account number, but doesn't write it to the card yet.'""" |
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| 198 | if account is None : |
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| 199 | return int(self.sendCommand("account")) |
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| 200 | else : |
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| 201 | return self.sendCommand("account", account) |
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| 202 | |
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| 203 | def department(self, department) : |
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| 204 | """Returns the last department number read, or sets the department number, but doesn't write it to the card yet.'""" |
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| 205 | if department is None : |
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| 206 | return int(self.sendCommand("department")) |
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| 207 | else : |
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| 208 | return self.sendCommand("department", department) |
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| 209 | |
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| 210 | def group(self, group) : |
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| 211 | """Returns the last group number read, or sets the group number, but doesn't write it to the card yet.'""" |
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| 212 | if group is None : |
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| 213 | return int(self.sendCommand("group")) |
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| 214 | else : |
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| 215 | return self.sendCommand("group", group) |
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| 216 | |
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| 217 | def addgrp(self, group=None) : |
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| 218 | """Adds the group to the list of allowed ones. If no group, the one on the admin card is used.""" |
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| 219 | return int(self.sendCommand("addgrp", group)) |
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| 220 | |
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| 221 | def listgrp(self) : |
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| 222 | """Returns the list of allowed group numbers.""" |
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| 223 | return self.sendCommand("listgrp") |
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| 224 | |
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| 225 | def delgrp(self, group) : |
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| 226 | """Deletes the group from the list of allowed groups.""" |
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| 227 | return int(self.sendCommand("delgrp", group)) |
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| 228 | |
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| 229 | def cardtype(self, cardtype) : |
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| 230 | """Returns the type of card, or sets it (not clear in the doc if a write call is needed or not).""" |
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| 231 | return int(self.sendCommand("cardtype", cardtype)) |
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| 232 | |
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| 233 | def display(self, text) : |
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| 234 | """Displays a string of text on the TCRS' screen.""" |
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| 235 | return self.sendCommand("display", text) |
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| 236 | |
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| 237 | def echo(self, echo) : |
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| 238 | """Changes the type of echo for the TCRS' keyboard.""" |
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| 239 | raise NotImplementedError |
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| 240 | |
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| 241 | def key(self, key) : |
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| 242 | """Not really clear what it does...""" |
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| 243 | raise NotImplementedError |
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| 244 | |
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| 245 | def getstr(self) : |
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| 246 | """Returns a string from keyboard or -1 if buffer is empty.""" |
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| 247 | raise NotImplementedError |
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| 248 | |
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| 249 | def getkey(self) : |
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| 250 | """Returns the value of the key pressed, or -1 if no key was hit.""" |
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| 251 | raise NotImplementedError |
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| 252 | |
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| 253 | def prompt1(self, prompt1) : |
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| 254 | """Changes the 'Introduce card' message.""" |
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| 255 | raise NotImplementedError |
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| 256 | |
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| 257 | def prompt2(self, prompt2) : |
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| 258 | """Changes the 'Credit:' message.""" |
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| 259 | raise NotImplementedError |
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| 260 | |
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| 261 | def prompt3(self, prompt3) : |
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| 262 | """Changes the text displayed after the value of the card (e.g. 'EURO').""" |
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| 263 | raise NotImplementedError |
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| 264 | |
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[3538] | 265 | if __name__ == "__main__" : |
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| 266 | # Minimal testing |
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| 267 | tcrs = CartadisTCRS("/dev/ttyS0", debug=True) |
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| 268 | tcrs.help() |
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| 269 | tcrs.close() |
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