import re
from CRC import do_crc
from select import select
+import socket, logging
+from time import time, sleep
+from MIFAREClient import MIFAREClient
asynchronous_responses = [ '400', '401', # door open/closed
'610', # switches changed
DOOR = 1
SWITCH = 2
KEY = 3
+TICK = 4
+MIFARE = 5
+
+class VendingException(Exception): pass
class VendingMachine:
- def __init__(self, rfh, wfh):
+ def __init__(self, rfh, wfh, use_mifare):
self.events = []
- self.secret = 'AAAAAAAAAAAAAAAA'
+ # Secret
+ self.secret = 'SN4CKZ0RZZZZZZZZ'
self.rfh = rfh
self.wfh = wfh
self.challenge = None
self.wfh.write('PING\n')
code = ''
while code != '000':
- (code, _) = self.get_response()
+ code = self.get_response()[0]
self.get_switches()
+ if use_mifare:
+ self.mifare = MIFAREClient()
+ self.mifare_timeout = 0
+ else:
+ self.mifare = None
def await_prompt(self):
self.wfh.flush()
state = 1
+ timeout = 0.5
prefix = ''
s = ''
+ # mtearle - vending machine was dying wait for a response from
+ # the hardware, suspect it was missing characters
+ #
+ # fixed by migration to pyserial - but future good place to start
while True:
- s = self.rfh.read(1)
- if s == '': raise Exception('nothing read!')
+ try:
+ s = self.rfh.read(1)
+ except socket.error:
+ raise VendingException('failed to read input from vending machine')
+ if s == '': raise VendingException('nothing read!')
+ if (s != '#' and s != '%') and state == 1: prefix += s
if s == '\n' or s == '\r':
state = 1
prefix = ''
s = ''
while s == '':
s = self.rfh.readline()
- if s == '': return None
+ if s == '':
+ raise VendingException('Input socket has closed!')
s = s.strip('\r\n')
code = s[0:3]
text = s[4:]
def handle_event(self, code, text):
if code == '400':
- self.events.append((DOOR, 0))
- elif code == '401':
self.events.append((DOOR, 1))
+ elif code == '401':
+ self.events.append((DOOR, 0))
elif code == '610':
- self.events.append((SWITCH, None))
+ # NOP this. Nothing handles this yet.
+ #self.events.append((SWITCH, None))
self.interpret_switches(text)
elif code[0] == '2':
self.events.append((KEY, int(code[1:3])))
else:
- sys.stderr.write('WARNING: Unhandled event! (%s %s)\n'%(code,text))
+ logging.warning('Unhandled event! (%s %s)\n'%(code,text))
def authed_message(self, message):
if self.challenge == None:
def vend(self, item):
if not re.search('^[0-9][0-9]$', item):
return (False, 'Invalid item requested (%s)'%item)
- self.wfh.write(self.authed_message(('V%s\n'%item)+'\n'))
+ self.wfh.write(self.authed_message(('V%s'%item))+'\n')
(code, string) = self.get_response()
return (code == '100', code, string)
def display(self, string):
if len(string) > 10:
string = string[0:10]
+ string = re.sub('(.)\.', lambda match: '.'+match.group(1), string)
self.wfh.write('D'+string+'\n')
(code, string) = self.get_response()
return (code == '300', code, string)
def next_event(self, timeout = None):
# we don't want to buffer in the serial port, so we get all the events
# we can ASAP.
- if len(self.events) > 0: timeout = 0
- while True:
- (r, _, _) = select([self.rfh], [], [], timeout)
+
+ # Never have no timeout...
+ if timeout == None: timeout = 60*60*24*365
+
+ # Make sure we go through the loop at least once.
+ if timeout < 0: timeout = 0
+
+ while timeout >= 0:
+ this_timeout = min(timeout, 0.2)
+ timeout -= this_timeout
+
+ (r, _, _) = select([self.rfh], [], [], this_timeout)
if r:
self.get_response(async = True)
timeout = 0
- else:
+
+ if self.mifare:
+ now = time()
+ if now > self.mifare_timeout:
+ self.mifare_timeout = now + 0.5
+ mifare_uid = self.mifare.get_card_id()
+ if mifare_uid != None:
+ logging.info('Got MIFARE card id %s'%(repr(mifare_uid)))
+ self.events.append((MIFARE, mifare_uid))
+ timeout = 0
+ if timeout == 0:
break
- if len(self.events) == 0: return None
+
+ if len(self.events) == 0: return (TICK, time())
ret = self.events[0]
del self.events[0]
return ret