Changes

Firmware checks for input (button push) in early boot. This branches into and launches diagnostic (Monitor) mode. Run Diag. Commands not yet fully discovered/mapped - some notes from gpt - I don't know if these are correct, when I have the device under test I will try them  '''''✔ 0x1B and 0x46 — DIAG Subcommands''''' '''''These appear inside the deeper diag handler:''''' '''''0x00001043 f01b mov.b #0x1B,r0h''''' '''''0x00001045 f246 mov.b #0x46,r2h''''' '''''This means:''''' '''''0x1B = Enter diagnostic test''''' '''''0x46 = Specific test function (flash, RAM, or checksum)''''' '''''Top-level diagnostic commands''''' '''''These are definitely UART commands:''''' '''''0x58 — Read flash block / memory block''''' '''''0x55 — Write / verify / checksum''''' '''''0x54 — Diagnostic mode / erase / access system''''' '''''0x1B — Diagnostic test subcommand''''' '''''0x46 — Diagnostic action (RAM/flash test)'''''

With more help from LLM I made a DFU Update python script which first sends the (probable) DFU command, and then sends sequentially all midi files over serial (at midi baud) I compared the received payload to the sent, and it is correct. I have yet to test on the device.<syntaxhighlight lang="python3">import serialimport timefrom pathlib import Path # =========================# CONFIGURATION# =========================UART_PORT = 'socket://192.168.1.182:31250' # ser2net using raw TCPBAUD_RATE = 31250 # MIDI baudDFU_TRIGGER = bytes([0xAE, 0xE8, 0x6A, 0xF7])FILES_TO_SEND = [ 'difsys1.mid', 'difsys2.mid', 'difsys3.mid', 'difsys4.mid']PAUSE_BETWEEN_FILES = 1.5 # secondsBYTE_DELAY = 0.00032 # per byte (~320 µs)DFU_DELAY = 1 # seconds to wait after sending trigger # =========================# HELPER FUNCTIONS# =========================def send_file(uart, filepath): filepath = Path(filepath) if not filepath.is_file(): print(f"⚠️ File not found: {filepath}") return False  filesize = filepath.stat().st_size print(f"📤 Streaming {filepath} ({filesize} bytes)...") sent_bytes = 0  with filepath.open('rb') as f: while (byte := f.read(1)): uart.write(byte) sent_bytes += 1 if BYTE_DELAY > 0: time.sleep(BYTE_DELAY) if sent_bytes % 1024 == 0 or sent_bytes == filesize: pct = (sent_bytes / filesize) * 100 print(f"\rProgress: {pct:.1f}%", end='', flush=True)  print("\rProgress: 100.0% ✅") return True # =========================# MAIN ROUTINE# =========================def main(): try: uart = serial.serial_for_url( UART_PORT, baudrate=BAUD_RATE, bytesize=serial.EIGHTBITS, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, timeout=0.1 ) print(f"Opened UART on {UART_PORT} at {BAUD_RATE} bps.") time.sleep(4.0) # allow connection to fully settle uart.reset_input_buffer() uart.reset_output_buffer() print("UART ready — flushing done, waiting 4s before sending DFU trigger...") except Exception as e: print(f"❌ Failed to open UART: {e}") return  # --- DFU Trigger --- print(f"Sending DFU trigger: {DFU_TRIGGER.hex()}") uart.write(DFU_TRIGGER) uart.flush() time.sleep(DFU_DELAY)  # --- Stream Update Files --- for file_path in FILES_TO_SEND: if not send_file(uart, file_path): print("❌ Aborting: file not found or error.") break time.sleep(PAUSE_BETWEEN_FILES)  uart.close() print("🎉 All files streamed successfully.")  if __name__ == "__main__": main() </syntaxhighlight><syntaxhighlight lang="python">readme python dfu update -  1 Put your MIDI files in the same folder as the script Name them exactly as in the script, or update FILES_TO_SEND in the script to match your filenames: FILES_TO_SEND = [ 'update1.mid', 'update2.mid', 'update3.mid', 'update4.mid'] 2 Adjust the UART port Set UART_PORT in the script to your actual port: Windows: COM3, COM4, etc. Linux/Mac: /dev/ttyUSB0, /dev/tty.usbserial-XXXX, etc. UART_PORT = 'COM3' 3 Run the script Open a terminal/command prompt in the folder with the script and MIDI files: python your_script_name.py  You should see: Opened UART on COM3 at 31250 bps.Sending DFU trigger command...Streaming update1.mid (12345 bytes)...Progress: 100.0%Finished streaming update1.midStreaming update2.mid ......All files streamed successfully. ⚡ Notes Make sure nothing else is using the UART port while running the script. The BYTE_DELAY = 0.00035 handles average 120 BPM playback, no per-file analysis needed. If a file is missing, the script will print an error and stop.</syntaxhighlight>