-
Notifications
You must be signed in to change notification settings - Fork 0
/
midas.py
448 lines (380 loc) · 9.52 KB
/
midas.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
#!/usr/bin/python
# -*- coding: utf-8 -*-
#import
import config as c
import RPi.GPIO as g
from pirc522 import RFID
from time import sleep
from time import time
from thread import start_new_thread as thread
import sqlite3 as lite
import binascii
import signal
import termios
import sys
import tty
###########################################
#RFID
r = RFID()
inbuf = []
bc = False
bt = 0
class Database:
db = False
#def __init__(self):
# self.open()
#def __exit__(self):
# self.close()
def open(self):
self.db = lite.connect(c.DBFILE)
if self.db:
return True
else:
return False
def close(self):
if self.db:
self.db.close()
def query(self,que):
cur = self.db.cursor()
if que.startswith("SELECT") or que.startswith("select"):
cur.execute(str(que))
return cur.fetchall()
else:
try:
cur.execute(str(que))
self.db.commit()
return True
except:
return False
###########################################
# allg funktionen
def cent(integ):
if integ < 0:
vorz = "-"
integ = integ*(-1)
else:
vorz = ""
cent = integ % 100
euro = (integ-cent)/100
if cent < 10:
return vorz+str(euro)+",0"+str(cent)
else:
return vorz+str(euro)+","+str(cent)
def debug(s):
if c.DEBUG:
print(s)
def toHex(s):
return binascii.hexlify(bytearray(s))
def main():
rf = False
rt = 0
global bc
global bt
sql = False
account = False
product = False
on = False
# Display GPIO
g.setwarnings(False)
g.setmode(g.BOARD) # Use BCM GPIO numbers
g.setup(c.LCD_E, g.OUT) # E
g.setup(c.LCD_RS, g.OUT) # RS
g.setup(c.LCD_D4, g.OUT) # DB4
g.setup(c.LCD_D5, g.OUT) # DB5
g.setup(c.LCD_D6, g.OUT) # DB6
g.setup(c.LCD_D7, g.OUT) # DB7
#LED GPIO
g.setup(c.LED_RED, g.OUT) #rote LED
g.setup(c.LED_GREEN, g.OUT) #gruene LED
# Initialise display
lcd_init()
debug("D: init")
# Send some test
lcd_string("XXXXXXXXXXXXXXXXXXXX",c.LCD_LINE_1)
lcd_string("XXXXXXXXXXXXXXXXXXXX",c.LCD_LINE_2)
lcd_string("XXXXXXXXXXXXXXXXXXXX",c.LCD_LINE_3)
lcd_string("XXXXXXXXXXXXXXXXXXXX",c.LCD_LINE_4)
sleep(1)
debug("D: test")
lcd_string(" Projekt Midas ",c.LCD_LINE_1)
lcd_string(" Kassensystem ",c.LCD_LINE_2)
lcd_string(" Version 0.3.1 ",c.LCD_LINE_3)
lcd_string(" electronicfreak ",c.LCD_LINE_4)
sleep(3)
debug("D: start")
lcd_blank()
thread(barc_thread,())
while True:
rf = rfid_get()
if rf:
db.open()
account = db_account(rf)
if account:
on = True
rt = time()
if not product:
dis_account(account[0][0],account[0][1],account[0][2])
else:
rt = time()
dis_unkacc()
db_newacc(rf)
led_insert()
if bc:
db.open()
product = db_product(bc)
if product:
on = True
#lcd_string(bc,c.LCD_LINE_2)
if not account:
dis_product(product[0][0],product[0][1],product[0][2],product[0][3])
else:
on = True
bc = False
bt = time()
dis_unkpro()
soon = time() - c.TIMED
#debug(str(product) +" - "+ str(account))
if product and account:
bt = time()
rt = bt
if db_buy(account[0][0],product[0][0]):
dis_buy(account[0][1],product[0][3])
led_ok()
else:
dis_nobuy()
led_fail()
bc = False
rf = False
product = False
account = False
if soon > bt:
bt = 0
bc = False
product = False
if soon > rt:
rt = 0
account = False
if rt == 0 and bt == 0 and on:
on = False
lcd_blank()
db.close()
sleep(0.5)
# ungetestet
def db_account(uuid):
global db
data = db.query("SELECT tokenID, cash, saldo FROM tokens WHERE tokenID = '"+uuid+"'")
if len(data) == 1:
#token gefunden
return data
return False
#ungetestet
def db_product(barcode):
global db
data = db.query("SELECT snackID, name, amount, price FROM snacks WHERE snackID = '"+barcode+"'")
if len(data) == 1:
#code gefunden
return data
else:
#code nicht existent
return False
def db_newacc(uuid):
global db
if db.query("INSERT INTO tokens (tokenID,cash,saldo) VALUES ('"+uuid+"',0,0);"):
debug("New Token success")
else:
debug("New Token failed")
def db_buy(rfid,barcode):
global db
snack = db.query("SELECT price, amount FROM snacks WHERE snackID = '"+barcode+"'")
if rfid != "":
token = db.query("SELECT cash, saldo FROM tokens WHERE tokenID = '"+rfid+"'")
#prüfen ob ausreichend geld da ist
if (token[0][0]+token[0][1])>snack[0][1]:
#wenn ja,
#geld abziehen
if snack[0][0] < 0:
db.query("UPDATE tokens set cash=cash+("+str(snack[0][0]*(-1))+") WHERE tokenID='"+rfid+"';")
else:
db.query("UPDATE tokens set cash=cash-"+str(snack[0][0])+" WHERE tokenID='"+rfid+"';")
#todo prüfen, ob geld wirklich abgebucht wurde
#snack amount reducen
db.query("UPDATE snacks SET amount=amount-1 WHERE snackID = '"+barcode+"'")
return True
return False
def dis_account(uuid,guthaben,limit):
lcd_string(uuid,c.LCD_LINE_1)
lcd_string("Guthaben: "+ str(cent(guthaben)),c.LCD_LINE_2)
lcd_string("Limit: "+ str(cent(limit)),c.LCD_LINE_3)
lcd_string("",c.LCD_LINE_4)
debug("D: account abfrage UUID:"+ str(uuid) +" Guthaben:"+ str(guthaben) +" Limit:"+ str(limit))
#produkt daten
def dis_product(barcode,prodname,amount,price):
lcd_string(prodname,c.LCD_LINE_1)
lcd_string("Preis: "+ str(cent(price)),c.LCD_LINE_2)
lcd_string("Anzahl: "+ str(amount),c.LCD_LINE_3)
lcd_string("",c.LCD_LINE_4)
debug("D: produkt abfrage "+ str(barcode) +" Bez:"+ str(prodname) +" Anzahl:"+ str(amount) +" Preis:"+ str(price))
def dis_unkpro():
lcd_string("O------------------O",c.LCD_LINE_1)
lcd_string("| No Entry |",c.LCD_LINE_2)
lcd_string("O------------------O",c.LCD_LINE_3)
lcd_string("",c.LCD_LINE_4)
debug("D: unbekannter Barcode")
#rfid ohne account gescannt
def dis_unkacc():
lcd_string("O------------------O",c.LCD_LINE_1)
lcd_string("| New Account |",c.LCD_LINE_2)
lcd_string("O------------------O",c.LCD_LINE_3)
lcd_string("",c.LCD_LINE_4)
debug("D: unbekannte RFID")
def dis_buy(guthaben,price):
lcd_string(str(cent(guthaben)),c.LCD_LINE_1)
lcd_string(str(cent(price*(-1))),c.LCD_LINE_2)
lcd_string("--------------------",c.LCD_LINE_3)
lcd_string(str(cent(guthaben-price)),c.LCD_LINE_4)
debug("D: kauf erfolgreich Guthaben:"+ str(guthaben) +" Preis:"+ str(price))
#kauf fehlgeschlagen
def dis_nobuy():
lcd_string("O------------------O",c.LCD_LINE_1)
lcd_string("| N O D E A L |",c.LCD_LINE_2)
lcd_string("O------------------O",c.LCD_LINE_3)
lcd_string("",c.LCD_LINE_4)
debug("D: kauf fehlgeschlagen")
def rfid_get():
global r
(error, tag_type) = r.request()
if not error:
debug("Tag detected")
(error, uid) = r.anticoll()
if not error:
uuid = toHex(uid)
debug("UID: " + uuid)
return uuid
return False
# warte auf eingabe in den eingabe buffer und nehme ein zeichen
# getestet
def bc_char():
fd = sys.stdin.fileno()
old_settings = termios.tcgetattr(fd)
debug("CH:check")
try:
tty.setraw(sys.stdin.fileno())
ch = sys.stdin.read(1)
debug(ch)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
return ch
# timeout aufräum funktion
# glaube unnoetig
def interrupted(signum,frame):
global inbuf
inbuf = []
debug("Interrupted!!!")
# warte auf eingabe mit timeout
# getestet
def barc_thread():
global inbuf
global bc
global bt
sig = 0
while True:
r = bc_char()
if r == '#':
exit()
debug(str((sig + c.TIMEO)) +" : "+ str(time()))
if (sig + c.TIMEO) < time():
inbuf = []
sig = time()
inbuf.append(str(r))
debug((r,len(inbuf)))
if len(inbuf) >= c.BCLEN:
bc = "".join(inbuf)
debug(bc)
bt = time()
inbuf = []
else:
bc = False
bt = 0
def lcd_init():
# Initialise display
lcd_byte(0x33,c.LCD_CMD) # 110011 Initialise
lcd_byte(0x32,c.LCD_CMD) # 110010 Initialise
lcd_byte(0x06,c.LCD_CMD) # 000110 Cursor move direction
lcd_byte(0x0C,c.LCD_CMD) # 001100 Display On,Cursor Off, Blink Off
lcd_byte(0x28,c.LCD_CMD) # 101000 Data length, number of lines, font size
lcd_byte(0x01,c.LCD_CMD) # 000001 Clear display
sleep(c.E_DELAY)
def lcd_blank():
debug("L: blank")
lcd_byte(0x01,c.LCD_CMD)
sleep(c.E_DELAY)
def lcd_byte(bits, mode):
# Send byte to data pins
# bits = data
# mode = True for character
# False for command
g.output(c.LCD_RS, mode) # RS
# High bits
g.output(c.LCD_D4, False)
g.output(c.LCD_D5, False)
g.output(c.LCD_D6, False)
g.output(c.LCD_D7, False)
if bits&0x10==0x10:
g.output(c.LCD_D4, True)
if bits&0x20==0x20:
g.output(c.LCD_D5, True)
if bits&0x40==0x40:
g.output(c.LCD_D6, True)
if bits&0x80==0x80:
g.output(c.LCD_D7, True)
# Toggle 'Enable' pin
lcd_toggle_enable()
# Low bits
g.output(c.LCD_D4, False)
g.output(c.LCD_D5, False)
g.output(c.LCD_D6, False)
g.output(c.LCD_D7, False)
if bits&0x01==0x01:
g.output(c.LCD_D4, True)
if bits&0x02==0x02:
g.output(c.LCD_D5, True)
if bits&0x04==0x04:
g.output(c.LCD_D6, True)
if bits&0x08==0x08:
g.output(c.LCD_D7, True)
# Toggle 'Enable' pin
lcd_toggle_enable()
def lcd_toggle_enable():
# Toggle enable
sleep(c.E_DELAY)
g.output(c.LCD_E, True)
sleep(c.E_PULSE)
g.output(c.LCD_E, False)
sleep(c.E_DELAY)
def lcd_string(message,line):
# Send string to display
message = message.ljust(c.LCD_WIDTH," ")
lcd_byte(line, c.LCD_CMD)
for i in range(c.LCD_WIDTH):
lcd_byte(ord(message[i]),c.LCD_CHR)
def led(io,muster):
m = list(muster)
for n in m:
g.output(io,int(n))
sleep(0.25)
g.output(io,0)
def led_ok():
thread(led,(c.LED_GREEN,"1111"))
def led_fail():
thread(led,(c.LED_RED,"11110000111100001111"))
def led_insert():
thread(led,(c.LED_GREEN,"10101010"))
if __name__ == '__main__':
#try:
db = Database()
main()
#except KeyboardInterrupt:
pass
#finally:
lcd_byte(0x01, c.LCD_CMD)
g.cleanup()