Dumps a router's flash via the CFE serial console

cfe_serial_dump.py

import serial

OFFSET = 0
NUM_PAGES = 64 * 2048

f = open('serial_dump.bin', 'wb')

io = serial.Serial('/dev/ttyUSB0', baudrate=115200)

io.read_until(b'Auto run second count down: 1')
io.write(b'f\n')

io.write(f'rn 0 {OFFSET} {NUM_PAGES}\n'.encode())

for _ in range(OFFSET, NUM_PAGES):
    io.read_until(b'------------------ block: ')
    bn = int(io.read_until(b', ')[:-2])
    io.read_until(b'page: ')
    pn = int(io.read_until(b' ')[:-1])
    io.read_until(b'\n')

    print(f'Block {bn}, page {pn}')

    page = bytearray(128*16)
    for i in range(128):
        io.read_until(b': ')
        hex_data = io.read_until(b'  ')[:-2].decode()
        hex_data = bytearray.fromhex(hex_data.replace(' ', ''))
        io.read_until(b'\n')
        page[i*16:(i+1)*16] = hex_data

    f.write(page)
    f.flush()

    for i in range(10):
        io.readline()

io.close()