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@ -49,7 +49,7 @@ def initialize_msg(serial): |
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if get_one_byte_answer(serial, 'ACK'): |
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return True |
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else: |
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print "Terminal : SAME PLAYER TRY AGAIN" |
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print("Terminal : SAME PLAYER TRY AGAIN") |
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send_one_byte_signal(serial, 'EOT') |
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# Wait 1 sec between each attempt |
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time.sleep(1) |
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@ -61,7 +61,7 @@ def send_one_byte_signal(serial, signal): |
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assert signal in ascii_names, 'Wrong signal' |
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char = ascii_names.index(signal) |
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serial_write(serial, chr(char)) |
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print 'Signal %s sent to terminal' % signal |
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print('Signal %s sent to terminal' % signal) |
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def get_one_byte_answer(serial, expected_signal): |
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@ -69,7 +69,7 @@ def get_one_byte_answer(serial, expected_signal): |
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one_byte_read = serial.read(1) |
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expected_char = ascii_names.index(expected_signal) |
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if one_byte_read == chr(expected_char): |
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print "%s received from terminal" % expected_signal |
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print("%s received from terminal" % expected_signal) |
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return True |
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else: |
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return False |
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@ -81,14 +81,14 @@ def prepare_data_to_send(): |
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elif PAYMENT_MODE == 'card': |
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payment_mode = '1' |
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else: |
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print "The payment mode '%s' is not supported" % PAYMENT_MODE |
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print("The payment mode '%s' is not supported" % PAYMENT_MODE) |
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return False |
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cur_iso_letter = CURRENCY_ISO.upper() |
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try: |
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cur = pycountry.currencies.get(alpha_3=cur_iso_letter) |
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cur_numeric = str(cur.numeric) |
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except: |
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print "Currency %s is not recognized" % cur_iso_letter |
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print("Currency %s is not recognized" % cur_iso_letter) |
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return False |
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data = { |
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'pos_number': str(1).zfill(2), |
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@ -124,13 +124,13 @@ def send_message(serial, data): |
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data['private'] + |
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data['delay'] + |
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data['auto']) |
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print 'Real message to send = %s' % real_msg |
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print('Real message to send = %s' % real_msg) |
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assert len(real_msg) == 34, 'Wrong length for protocol E+' |
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real_msg_with_etx = real_msg + chr(ascii_names.index('ETX')) |
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lrc = generate_lrc(real_msg_with_etx) |
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message = chr(ascii_names.index('STX')) + real_msg_with_etx + chr(lrc) |
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serial_write(serial, message) |
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print 'Message sent to terminal' |
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print('Message sent to terminal') |
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def compare_data_vs_answer(data, answer_data): |
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@ -152,7 +152,7 @@ def parse_terminal_answer(real_msg, data): |
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'currency_numeric': real_msg[12:15], |
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'private': real_msg[15:26], |
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} |
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print 'answer_data = %s' % answer_data |
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print('answer_data = %s' % answer_data) |
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compare_data_vs_answer(data, answer_data) |
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return answer_data |
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@ -161,18 +161,19 @@ def get_answer_from_terminal(serial, data): |
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ascii_names = curses.ascii.controlnames |
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full_msg_size = 1+2+1+8+1+3+10+1+1 |
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msg = serial.read(size=full_msg_size) |
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print '%d bytes read from terminal' % full_msg_size |
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print('%d bytes read from terminal' % full_msg_size) |
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assert len(msg) == full_msg_size, 'Answer has a wrong size' |
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if msg[0] != chr(ascii_names.index('STX')): |
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print 'The first byte of the answer from terminal should be STX' |
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print('The first byte of the answer from terminal should be STX') |
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if msg[-2] != chr(ascii_names.index('ETX')): |
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print 'The byte before final of the answer from terminal should be ETX' |
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print('The byte before final of the answer ' |
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'from terminal should be ETX') |
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lrc = msg[-1] |
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computed_lrc = chr(generate_lrc(msg[1:-1])) |
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if computed_lrc != lrc: |
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print 'The LRC of the answer from terminal is wrong' |
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print('The LRC of the answer from terminal is wrong') |
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real_msg = msg[1:-2] |
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print 'Real answer received = %s' % real_msg |
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print('Real answer received = %s' % real_msg) |
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return parse_terminal_answer(real_msg, data) |
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@ -189,7 +190,7 @@ def transaction_start(): |
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# that we have to wait to up 3 seconds to get LRC |
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serial = Serial( |
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DEVICE, DEVICE_RATE, timeout=3) |
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print 'serial.is_open = %s' % serial.isOpen() |
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print('serial.is_open = %s' % serial.isOpen()) |
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if initialize_msg(serial): |
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data = prepare_data_to_send() |
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if not data: |
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@ -198,19 +199,19 @@ def transaction_start(): |
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if get_one_byte_answer(serial, 'ACK'): |
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send_one_byte_signal(serial, 'EOT') |
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print "Now expecting answer from Terminal" |
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print("Now expecting answer from Terminal") |
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if get_one_byte_answer(serial, 'ENQ'): |
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send_one_byte_signal(serial, 'ACK') |
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get_answer_from_terminal(serial, data) |
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send_one_byte_signal(serial, 'ACK') |
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if get_one_byte_answer(serial, 'EOT'): |
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print "Answer received from Terminal" |
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print("Answer received from Terminal") |
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except Exception, e: |
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print 'Exception in serial connection: %s' % str(e) |
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except Exception as e: |
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print('Exception in serial connection: %s' % str(e)) |
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finally: |
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if serial: |
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print 'Closing serial port for payment terminal' |
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print('Closing serial port for payment terminal') |
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serial.close() |
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