// Add ESC/POS init if buffer empty if(dev->buffer_pos == 0) u8 init_seq[] = 0x1B, 0x40; tz30_send(dev, init_seq, 2);
def print_line(self, text): self.ser.write(text.encode() + b'\n') citizen tz30-m01 driver
def status(self): self.ser.write(b'\x10\x04\x01') return self.ser.read(1) tz = CitizenTZ30("/dev/ttyAMA0") tz.print_line("Receipt #123") tz.cut() | Test Case | Procedure | Expected Result | |-------------------------|------------------------------------------------|--------------------------------| | Basic print | Send "Test\n" | Text printed, paper advances | | Cut after print | Print line + full cut command | Paper fully severed | | Paper out handling | Remove paper, send data | Driver returns error, no print | | High-speed throughput | 1 MB of text at 200 mm/s | No buffer overflow, consistent | | Thermal runaway protect | Run continuous print > 30 sec | Driver throttles or pauses | 10. Appendix: Pinout (Example for TTL Serial) | Pin | Signal | Voltage | Direction | Notes | |-----|--------------|---------|-----------|---------------------------| | 1 | VCC (5V) | 5V | Input | Logic supply | | 2 | GND | 0V | - | Common ground | | 3 | TXD | 5V TTL | Output | Printer → Host (status) | | 4 | RXD | 5V TTL | Input | Host → Printer (commands) | | 5 | DTR (BUSY) | 5V TTL | Output | High = printer busy | | 6 | RESET (opt) | 5V TTL | Input | Low pulse >10 µs resets | | 7 | VH (24V) | 24V | Input | Printhead motor power | 11. Conclusion The Citizen TZ30-M01 driver must implement a reliable ESC/POS-compatible serial interface, real-time status monitoring, automatic cutter control, and thermal protection. The provided architecture and code examples serve as a foundation for embedded Linux, RTOS, or bare-metal integration. For exact timings and command extensions, refer to the official Citizen TZ30 series hardware manual. // Add ESC/POS init if buffer empty if(dev->buffer_pos
tz30_send(dev, kbuf, count); kfree(kbuf); return count; The provided architecture and code examples serve as
return 0;