For real hardware (e.g., MagTek, ID Tech readers), you would replace the simulated I/O with serial/USB HID commands.
def is_valid_track(self, track_num, data): if track_num == 1: return all(ch in TRACK1_CHARSET for ch in data) and len(data) <= TRACK_MAX_LEN[1] elif track_num == 2: return all(ch in TRACK2_CHARSET for ch in data) and len(data) <= TRACK_MAX_LEN[2] elif track_num == 3: return all(ch in TRACK3_CHARSET for ch in data) and len(data) <= TRACK_MAX_LEN[3] return False magcard write read utility program
# Interactive mode card = MagCard() print("\n===== MagCard Utility (Simulated) =====") print("Commands: w(rite), r(ead), d(isplay), c(lear), q(uit)\n") while True: cmd = input("> ").strip().lower() if cmd == 'q': break elif cmd == 'w': interactive_write(card) elif cmd == 'r': interactive_read(card) elif cmd == 'd': display_card(card) elif cmd == 'c': card.clear() print("Card cleared.") else: print("Unknown command. Try w, r, d, c, q.") if == " main ": main() How to use it 1. Interactive mode Run the script with no arguments: For real hardware (e
def interactive_write(card): track = int(input("Enter track to write (1/2/3): ")) data = input(f"Enter data for track track (max TRACK_MAX_LEN[track] chars): ").strip() try: card.write_track(track, data) print(f"Track track written successfully.") except ValueError as e: print(f"Write failed: e") Interactive mode Run the script with no arguments:
python magcard_util.py --write "2:1234567890" Read track 1:
def write_track(self, track_num, data): if not self.is_valid_track(track_num, data): raise ValueError(f"Invalid data for track track_num. Length or character mismatch.") if track_num == 1: self.track1 = data elif track_num == 2: self.track2 = data elif track_num == 3: self.track3 = data else: raise ValueError("Track must be 1, 2, or 3")
For example, a USB keyboard wedge reader would just capture swiped data as if typed – no special driver needed. A writer would require sending track data in a proprietary command format over USB HID or serial.