+# vim:ts=4
import re
from CRC import do_crc
-from binascii import unhexlify
+from select import select
+import socket, logging
+from time import time, sleep
asynchronous_responses = [ '400', '401', # door open/closed
'610', # switches changed
+ '200', '201', '202', '203', '204', '205', '206',
+ '207', '208', '209', '211', # key presses
]
+DOOR = 1
+SWITCH = 2
+KEY = 3
+TICK = 4
+
+class VendingException(Exception): pass
class VendingMachine:
def __init__(self, rfh, wfh):
- self.secret = 'AAAAAAAAAAAAAAAA'
+ self.events = []
+ # 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()
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
+ 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 = ''
self.challenge = None
return
if re.search('^[0-9a-fA-F]{4}$', prefix):
- self.challenge = unhexlify(prefix)
+ self.challenge = int(prefix, 16)
return
- def get_response(self):
+ def get_response(self, async = False):
self.wfh.flush()
while True:
s = ''
while s == '':
s = self.rfh.readline()
- if s == '': return None
+ if s == '':
+ raise VendingException('Input socket has closed!')
s = s.strip('\r\n')
code = s[0:3]
text = s[4:]
if code in asynchronous_responses:
self.handle_event(code, text)
+ if async: return None
else:
self.await_prompt()
return (code, text)
+ def get_switches(self):
+ self.wfh.write('S\n')
+ (code, text) = self.get_response()
+ if code != '600':
+ return (False, code, text)
+ self.interpret_switches(text)
+ return (True, code, text)
+
+ def interpret_switches(self, text):
+ self.switches = (int(text[0:2], 16) << 8) | int(text[3:5], 16)
+
def handle_event(self, code, text):
- pass
+ if code == '400':
+ self.events.append((DOOR, 1))
+ elif code == '401':
+ self.events.append((DOOR, 0))
+ elif code == '610':
+ # NOP this. Nothing handles this yet.
+ #self.events.append((SWITCH, None))
+ self.interpret_switches(text)
+ elif code[0] == '2':
+ self.events.append((KEY, int(code[1:3])))
+ else:
+ logging.warning('Unhandled event! (%s %s)\n'%(code,text))
def authed_message(self, message):
if self.challenge == None:
def vend(self, item):
if not re.search('^[0-9][0-9]$', 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, string)
+ return (code == '100', code, string)
def beep(self, duration = None, synchronous = True):
msg = 'B'
msg += '%02x'%duration
self.wfh.write(msg+'\n')
(code, string) = self.get_response()
- # FIXME: workaround a bug in rom W. should be just: return (code == '500', code, string)
- return (code == '500' or code == '501', code, string)
+ return (code == '501', 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 timeout < 0: timeout = 0
+ if len(self.events) > 0: timeout = 0
+ while True:
+ (r, _, _) = select([self.rfh], [], [], timeout)
+ if r:
+ self.get_response(async = True)
+ timeout = 0
+ else:
+ break
+ if len(self.events) == 0: return (TICK, time())
+ ret = self.events[0]
+ del self.events[0]
+ return ret
git.ucc.asn.au / uccvend-vendserver.git / blobdiff
UCC git Repository :: git.ucc.asn.au