318 lines
11 KiB
Python
318 lines
11 KiB
Python
|
#!/usr/bin/env python
|
||
|
|
#
|
||
|
|
# Copyright 2021 Don Kjer
|
||
|
|
#
|
||
|
|
# This program is free software: you can redistribute it and/or modify
|
||
|
|
# it under the terms of the GNU General Public License as published by
|
||
|
|
# the Free Software Foundation, either version 2 of the License, or
|
||
|
|
# (at your option) any later version.
|
||
|
|
#
|
||
|
|
# This program is distributed in the hope that it will be useful,
|
||
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
# GNU General Public License for more details.
|
||
|
|
#
|
||
|
|
# You should have received a copy of the GNU General Public License
|
||
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
#
|
||
|
|
|
||
|
|
from __future__ import print_function
|
||
|
|
|
||
|
|
import argparse
|
||
|
|
from struct import pack, unpack
|
||
|
|
import os, sys
|
||
|
|
|
||
|
|
MAGIC_FEEA = '\xea\xff\xfe\xff'
|
||
|
|
|
||
|
|
MAGIC_FEE9 = '\x16\x01'
|
||
|
|
EMPTY_WORD = '\xff\xff'
|
||
|
|
WORD_ENCODING = 0x8000
|
||
|
|
VALUE_NEXT = 0x6000
|
||
|
|
VALUE_RESERVED = 0x4000
|
||
|
|
VALUE_ENCODED = 0x2000
|
||
|
|
BYTE_RANGE = 0x80
|
||
|
|
|
||
|
|
CHUNK_SIZE = 1024
|
||
|
|
|
||
|
|
STRUCT_FMTS = {
|
||
|
|
1: 'B',
|
||
|
|
2: 'H',
|
||
|
|
4: 'I'
|
||
|
|
}
|
||
|
|
PRINTABLE='0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~ '
|
||
|
|
|
||
|
|
EECONFIG_V1 = [
|
||
|
|
("MAGIC", 0, 2),
|
||
|
|
("DEBUG", 2, 1),
|
||
|
|
("DEFAULT_LAYER", 3, 1),
|
||
|
|
("KEYMAP", 4, 1),
|
||
|
|
("MOUSEKEY_ACCEL", 5, 1),
|
||
|
|
("BACKLIGHT", 6, 1),
|
||
|
|
("AUDIO", 7, 1),
|
||
|
|
("RGBLIGHT", 8, 4),
|
||
|
|
("UNICODEMODE", 12, 1),
|
||
|
|
("STENOMODE", 13, 1),
|
||
|
|
("HANDEDNESS", 14, 1),
|
||
|
|
("KEYBOARD", 15, 4),
|
||
|
|
("USER", 19, 4),
|
||
|
|
("VELOCIKEY", 23, 1),
|
||
|
|
("HAPTIC", 24, 4),
|
||
|
|
("MATRIX", 28, 4),
|
||
|
|
("MATRIX_EXTENDED", 32, 2),
|
||
|
|
("KEYMAP_UPPER_BYTE", 34, 1),
|
||
|
|
]
|
||
|
|
VIABASE_V1 = 35
|
||
|
|
|
||
|
|
VERBOSE = False
|
||
|
|
|
||
|
|
def parseArgs():
|
||
|
|
parser = argparse.ArgumentParser(description='Decode an STM32 emulated eeprom dump')
|
||
|
|
parser.add_argument('-s', '--size', type=int,
|
||
|
|
help='Size of the emulated eeprom (default: input_size / 2)')
|
||
|
|
parser.add_argument('-o', '--output', help='File to write decoded eeprom to')
|
||
|
|
parser.add_argument('-y', '--layout-options-size', type=int,
|
||
|
|
help='VIA layout options size (default: 1)', default=1)
|
||
|
|
parser.add_argument('-t', '--custom-config-size', type=int,
|
||
|
|
help='VIA custom config size (default: 0)', default=0)
|
||
|
|
parser.add_argument('-l', '--layers', type=int,
|
||
|
|
help='VIA keyboard layers (default: 4)', default=4)
|
||
|
|
parser.add_argument('-r', '--rows', type=int, help='VIA matrix rows')
|
||
|
|
parser.add_argument('-c', '--cols', type=int, help='VIA matrix columns')
|
||
|
|
parser.add_argument('-m', '--macros', type=int,
|
||
|
|
help='VIA macro count (default: 16)', default=16)
|
||
|
|
parser.add_argument('-C', '--canonical', action='store_true',
|
||
|
|
help='Canonical hex+ASCII display.')
|
||
|
|
parser.add_argument('-v', '--verbose', action='store_true', help='Verbose output')
|
||
|
|
parser.add_argument('input', help='Raw contents of the STM32 flash area used to emulate eeprom')
|
||
|
|
return parser.parse_args()
|
||
|
|
|
||
|
|
|
||
|
|
def decodeEepromFEEA(in_file, size):
|
||
|
|
decoded=size*[None]
|
||
|
|
pos = 0
|
||
|
|
while True:
|
||
|
|
chunk = in_file.read(CHUNK_SIZE)
|
||
|
|
for i in range(0, len(chunk), 2):
|
||
|
|
decoded[pos] = unpack('B', chunk[i])[0]
|
||
|
|
pos += 1
|
||
|
|
if pos >= size:
|
||
|
|
break
|
||
|
|
|
||
|
|
if len(chunk) < CHUNK_SIZE or pos >= size:
|
||
|
|
break
|
||
|
|
return decoded
|
||
|
|
|
||
|
|
def decodeEepromFEE9(in_file, size):
|
||
|
|
decoded=size*[None]
|
||
|
|
pos = 0
|
||
|
|
# Read compacted flash
|
||
|
|
while True:
|
||
|
|
read_size = min(size - pos, CHUNK_SIZE)
|
||
|
|
chunk = in_file.read(read_size)
|
||
|
|
for i in range(len(chunk)):
|
||
|
|
decoded[pos] = unpack('B', chunk[i])[0] ^ 0xFF
|
||
|
|
pos += 1
|
||
|
|
if pos >= size:
|
||
|
|
break
|
||
|
|
|
||
|
|
if len(chunk) < read_size or pos >= size:
|
||
|
|
break
|
||
|
|
if VERBOSE:
|
||
|
|
print("COMPACTED EEPROM:")
|
||
|
|
dumpBinary(decoded, True)
|
||
|
|
print("WRITE LOG:")
|
||
|
|
# Read write log
|
||
|
|
while True:
|
||
|
|
entry = in_file.read(2)
|
||
|
|
if len(entry) < 2:
|
||
|
|
print("Partial log address at position 0x%04x" % pos, file=sys.stderr)
|
||
|
|
break
|
||
|
|
pos += 2
|
||
|
|
|
||
|
|
if entry == EMPTY_WORD:
|
||
|
|
break
|
||
|
|
|
||
|
|
be_entry = unpack('>H', entry)[0]
|
||
|
|
entry = unpack('H', entry)[0]
|
||
|
|
if not (entry & WORD_ENCODING):
|
||
|
|
address = entry >> 8
|
||
|
|
decoded[address] = entry & 0xFF
|
||
|
|
if VERBOSE:
|
||
|
|
print("[0x%04x]: BYTE 0x%02x = 0x%02x" % (be_entry, address, decoded[address]))
|
||
|
|
else:
|
||
|
|
if (entry & VALUE_NEXT) == VALUE_NEXT:
|
||
|
|
# Read next word as value
|
||
|
|
value = in_file.read(2)
|
||
|
|
if len(value) < 2:
|
||
|
|
print("Partial log value at position 0x%04x" % pos, file=sys.stderr)
|
||
|
|
break
|
||
|
|
pos += 2
|
||
|
|
address = entry & 0x1FFF
|
||
|
|
address <<= 1
|
||
|
|
address += BYTE_RANGE
|
||
|
|
decoded[address] = unpack('B', value[0])[0] ^ 0xFF
|
||
|
|
decoded[address+1] = unpack('B', value[1])[0] ^ 0xFF
|
||
|
|
be_value = unpack('>H', value)[0]
|
||
|
|
if VERBOSE:
|
||
|
|
print("[0x%04x 0x%04x]: WORD 0x%04x = 0x%02x%02x" % (be_entry, be_value, address, decoded[address+1], decoded[address]))
|
||
|
|
else:
|
||
|
|
# Reserved for future use
|
||
|
|
if entry & VALUE_RESERVED:
|
||
|
|
if VERBOSE:
|
||
|
|
print("[0x%04x]: RESERVED 0x%04x" % (be_entry, address))
|
||
|
|
continue
|
||
|
|
address = entry & 0x1FFF
|
||
|
|
address <<= 1
|
||
|
|
decoded[address] = (entry & VALUE_ENCODED) >> 13
|
||
|
|
decoded[address+1] = 0
|
||
|
|
if VERBOSE:
|
||
|
|
print("[0x%04x]: ENCODED 0x%04x = 0x%02x%02x" % (be_entry, address, decoded[address+1], decoded[address]))
|
||
|
|
|
||
|
|
return decoded
|
||
|
|
|
||
|
|
def dumpBinary(data, canonical):
|
||
|
|
def display(pos, row):
|
||
|
|
print("%04x" % pos, end='')
|
||
|
|
for i in range(len(row)):
|
||
|
|
if i % 8 == 0:
|
||
|
|
print(" ", end='')
|
||
|
|
char = row[i]
|
||
|
|
if char is None:
|
||
|
|
print(" ", end='')
|
||
|
|
else:
|
||
|
|
print(" %02x" % row[i], end='')
|
||
|
|
if canonical:
|
||
|
|
print(" |", end='')
|
||
|
|
for i in range(len(row)):
|
||
|
|
char = row[i]
|
||
|
|
if char is None:
|
||
|
|
char = " "
|
||
|
|
else:
|
||
|
|
char = chr(char)
|
||
|
|
if char not in PRINTABLE:
|
||
|
|
char = "."
|
||
|
|
print(char, end='')
|
||
|
|
print("|", end='')
|
||
|
|
|
||
|
|
print("")
|
||
|
|
|
||
|
|
size = len(data)
|
||
|
|
empty_rows = 0
|
||
|
|
prev_row = ''
|
||
|
|
first_repeat = True
|
||
|
|
for pos in range(0, size, 16):
|
||
|
|
row=data[pos:pos+16]
|
||
|
|
row[len(row):16] = (16-len(row))*[None]
|
||
|
|
if row == prev_row:
|
||
|
|
if first_repeat:
|
||
|
|
print("*")
|
||
|
|
first_repeat = False
|
||
|
|
else:
|
||
|
|
first_repeat = True
|
||
|
|
display(pos, row)
|
||
|
|
prev_row = row
|
||
|
|
print("%04x" % (pos+16))
|
||
|
|
|
||
|
|
def dumpEeconfig(data, eeconfig):
|
||
|
|
print("EECONFIG:")
|
||
|
|
for (name, pos, length) in eeconfig:
|
||
|
|
fmt = STRUCT_FMTS[length]
|
||
|
|
value = unpack(fmt, ''.join([chr(x) for x in data[pos:pos+length]]))[0]
|
||
|
|
print(("%%04x %%s = 0x%%0%dx" % (length * 2)) % (pos, name, value))
|
||
|
|
|
||
|
|
def dumpVia(data, base, layers, cols, rows, macros,
|
||
|
|
layout_options_size, custom_config_size):
|
||
|
|
magicYear = data[base + 0]
|
||
|
|
magicMonth = data[base + 1]
|
||
|
|
magicDay = data[base + 2]
|
||
|
|
# Sanity check
|
||
|
|
if not 10 <= magicYear <= 0x99 or \
|
||
|
|
not 0 <= magicMonth <= 0x12 or \
|
||
|
|
not 0 <= magicDay <= 0x31:
|
||
|
|
print("ERROR: VIA Signature is not valid; Year:%x, Month:%x, Day:%x" % (magicYear, magicMonth, magicDay))
|
||
|
|
return
|
||
|
|
if cols is None or rows is None:
|
||
|
|
print("ERROR: VIA dump requires specifying --rows and --cols", file=sys.stderr)
|
||
|
|
return 2
|
||
|
|
print("VIA:")
|
||
|
|
# Decode magic
|
||
|
|
print("%04x MAGIC = 20%02x-%02x-%02x" % (base, magicYear, magicMonth, magicDay))
|
||
|
|
# Decode layout options
|
||
|
|
options = 0
|
||
|
|
pos = base + 3
|
||
|
|
for i in range(base+3, base+3+layout_options_size):
|
||
|
|
options = options << 8
|
||
|
|
options |= data[i]
|
||
|
|
print(("%%04x LAYOUT_OPTIONS = 0x%%0%dx" % (layout_options_size * 2)) % (pos, options))
|
||
|
|
pos += layout_options_size + custom_config_size
|
||
|
|
# Decode keycodes
|
||
|
|
keymap_size = layers * rows * cols * 2
|
||
|
|
if (pos + keymap_size) >= (len(data) - 1):
|
||
|
|
print("ERROR: VIA keymap requires %d bytes, but only %d available" % (keymap_size, len(data) - pos))
|
||
|
|
return 3
|
||
|
|
for layer in range(layers):
|
||
|
|
print("%s LAYER %d %s" % ('-'*int(cols*2.5), layer, '-'*int(cols*2.5)))
|
||
|
|
for row in range(rows):
|
||
|
|
print("%04x | " % pos, end='')
|
||
|
|
for col in range(cols):
|
||
|
|
keycode = (data[pos] << 8) | (data[pos+1])
|
||
|
|
print(" %04x" % keycode, end='')
|
||
|
|
pos += 2
|
||
|
|
print("")
|
||
|
|
# Decode macros
|
||
|
|
for macro_num in range(macros):
|
||
|
|
macro = ""
|
||
|
|
macro_pos = pos
|
||
|
|
while pos < len(data):
|
||
|
|
char = chr(data[pos])
|
||
|
|
pos += 1
|
||
|
|
if char == '\x00':
|
||
|
|
print("%04x MACRO[%d] = '%s'" % (macro_pos, macro_num, macro))
|
||
|
|
break
|
||
|
|
else:
|
||
|
|
macro += char
|
||
|
|
return 0
|
||
|
|
|
||
|
|
|
||
|
|
def decodeSTM32Eeprom(input, canonical, size=None, output=None, **kwargs):
|
||
|
|
input_size = os.path.getsize(input)
|
||
|
|
if size is None:
|
||
|
|
size = input_size >> 1
|
||
|
|
|
||
|
|
# Read the first few bytes to check magic signature
|
||
|
|
with open(input, 'rb') as in_file:
|
||
|
|
magic=in_file.read(4)
|
||
|
|
in_file.seek(0)
|
||
|
|
|
||
|
|
if magic == MAGIC_FEEA:
|
||
|
|
decoded = decodeEepromFEEA(in_file, size)
|
||
|
|
eeconfig = EECONFIG_V1
|
||
|
|
via_base = VIABASE_V1
|
||
|
|
elif magic[:2] == MAGIC_FEE9:
|
||
|
|
decoded = decodeEepromFEE9(in_file, size)
|
||
|
|
eeconfig = EECONFIG_V1
|
||
|
|
via_base = VIABASE_V1
|
||
|
|
else:
|
||
|
|
print("Unknown magic signature: %s" % " ".join(["0x%02x" % ord(x) for x in magic]), file=sys.stderr)
|
||
|
|
return 1
|
||
|
|
|
||
|
|
if output is not None:
|
||
|
|
with open(output, 'wb') as out_file:
|
||
|
|
out_file.write(pack('%dB' % len(decoded), *decoded))
|
||
|
|
print("DECODED EEPROM:")
|
||
|
|
dumpBinary(decoded, canonical)
|
||
|
|
dumpEeconfig(decoded, eeconfig)
|
||
|
|
if kwargs['rows'] is not None and kwargs['cols'] is not None:
|
||
|
|
return dumpVia(decoded, via_base, **kwargs)
|
||
|
|
|
||
|
|
return 0
|
||
|
|
|
||
|
|
def main():
|
||
|
|
global VERBOSE
|
||
|
|
kwargs = vars(parseArgs())
|
||
|
|
VERBOSE = kwargs.pop('verbose')
|
||
|
|
return decodeSTM32Eeprom(**kwargs)
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
sys.exit(main())
|