mirror of
https://github.com/trezor/trezor-firmware.git
synced 2025-07-08 15:48:08 +00:00
89 lines
2.8 KiB
Python
89 lines
2.8 KiB
Python
#!/usr/bin/env python3
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import time
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from pathlib import Path
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import sys
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import zlib
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import click
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import serial
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def _compress(data: bytes) -> bytes:
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"""
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Compress data with zlib at max compression, raw deflate.
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"""
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compressor = zlib.compressobj(level=9, wbits=-10)
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return compressor.compress(data) + compressor.flush()
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def send_cmd(ser, cmd, expect_ok=True):
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"""Send a line, read response, and abort on CLI_ERROR."""
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ser.write((cmd + "\r\n").encode())
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# Give the device a moment to process
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time.sleep(0.05)
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resp = ser.readline().decode(errors='ignore').strip()
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while resp.startswith("#") or len(resp) == 0:
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resp = ser.readline().decode(errors='ignore').strip()
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click.echo(f"> {cmd}")
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click.echo(f"< {resp}")
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if expect_ok and not resp.startswith("OK"):
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click.echo("Error from device, aborting.", err=True)
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sys.exit(1)
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return resp
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def upload_bootloader(port, bin_path, chunk_size):
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# Read binary file
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data = Path(bin_path).read_bytes()
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orig_size = len(data)
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click.echo(f"Read {orig_size} bytes from {bin_path!r}")
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# Compress the data
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comp_data = _compress(data)
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comp_size = len(comp_data)
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click.echo(f"Compressed to {comp_size} bytes ({comp_size*100//orig_size}% of original)")
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# Open USB-VCP port
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ser = serial.Serial(port, timeout=2)
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time.sleep(0.1)
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ser.reset_input_buffer()
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ser.reset_output_buffer()
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# 1) Begin transfer
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send_cmd(ser, "bootloader-update begin")
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# 2) Stream compressed chunks
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offset = 0
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while offset < comp_size:
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chunk = comp_data[offset:offset+chunk_size]
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hexstr = chunk.hex()
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send_cmd(ser, f"bootloader-update chunk {hexstr}")
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offset += len(chunk)
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pct = offset * 100 // comp_size
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click.echo(f" Uploaded {offset}/{comp_size} bytes ({pct}%)")
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# 3) Finish transfer
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send_cmd(ser, "bootloader-update end")
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click.echo("Bootloader upload complete.")
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@click.command(context_settings={"help_option_names": ["-h", "--help"]})
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@click.argument("port", metavar="<serial-port>")
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@click.argument("binary", metavar="<bootloader-binary>", type=click.Path(exists=True, dir_okay=False))
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@click.option("--chunk-size", "-c", default=512, show_default=True,
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help="Max bytes per chunk (in compressed form)")
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def main(port, binary, chunk_size):
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"""
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Upload a (compressed) bootloader image via USB-VCP CLI.
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<serial-port> e.g. /dev/ttyUSB0 or COM3
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<bootloader-binary> path to the .bin file
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"""
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try:
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upload_bootloader(port, binary, chunk_size)
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except serial.SerialException as e:
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click.echo(f"Serial error: {e}", err=True)
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sys.exit(1)
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except KeyboardInterrupt:
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click.echo("Interrupted by user.", err=True)
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sys.exit(1)
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if __name__ == "__main__":
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main()
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