mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-12-25 07:19:28 -05:00
105 lines
3.2 KiB
Python
Executable File
105 lines
3.2 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
|
|
#
|
|
# Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
|
|
# Copyright (C) 2024 Mark Thompson
|
|
#
|
|
# This file is part of PortaPack.
|
|
#
|
|
# 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, 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; see the file COPYING. If not, write to
|
|
# the Free Software Foundation, Inc., 51 Franklin Street,
|
|
# Boston, MA 02110-1301, USA.
|
|
#
|
|
|
|
import sys
|
|
from external_app_info import maximum_application_size
|
|
from external_app_info import external_apps_address_start
|
|
from external_app_info import external_apps_address_end
|
|
|
|
usage_message = """
|
|
PortaPack SPI flash image generator
|
|
|
|
Usage: <command> <application_path> <baseband_path> <output_path>
|
|
Where paths refer to the .bin files for each component project.
|
|
"""
|
|
|
|
def read_image(path):
|
|
f = open(path, 'rb')
|
|
data = f.read()
|
|
f.close()
|
|
return data
|
|
|
|
def write_image(data, path):
|
|
f = open(path, 'wb')
|
|
f.write(data)
|
|
f.close()
|
|
|
|
if len(sys.argv) != 4:
|
|
print(usage_message)
|
|
sys.exit(-1)
|
|
|
|
application_image = read_image(sys.argv[1])
|
|
baseband_image = read_image(sys.argv[2])
|
|
output_path = sys.argv[3]
|
|
|
|
spi_size = 1048576
|
|
|
|
images = (
|
|
{
|
|
'name': 'application',
|
|
'data': application_image,
|
|
'size': len(application_image),
|
|
},
|
|
{
|
|
'name': 'baseband',
|
|
'data': baseband_image,
|
|
'size': len(baseband_image),
|
|
},
|
|
)
|
|
|
|
spi_image = bytearray()
|
|
spi_image_default_byte = bytearray((255,))
|
|
|
|
for image in images:
|
|
if len(image['data']) > image['size']:
|
|
raise RuntimeError('data for image "%(name)s" is longer than 0x%(size)x bytes 0x%(sz)x' % {'name':image['name'], 'size':image['size'], 'sz':len(image['data'])})
|
|
pad_size = image['size'] - len(image['data'])
|
|
padded_data = image['data'] + (spi_image_default_byte * pad_size)
|
|
spi_image += padded_data
|
|
|
|
if len(spi_image) > spi_size - 4:
|
|
raise RuntimeError('SPI flash image size of %d exceeds device size of %d bytes' % (len(spi_image) + 4, spi_size))
|
|
|
|
pad_size = spi_size - 4 - len(spi_image)
|
|
for i in range(pad_size):
|
|
spi_image += spi_image_default_byte
|
|
|
|
# quick "add up the words" checksum, and check for possible references to code in external apps
|
|
checksum = 0
|
|
for i in range(0, len(spi_image), 4):
|
|
snippet = spi_image[i:i+4]
|
|
val = int.from_bytes(snippet, byteorder='little')
|
|
checksum += val
|
|
if (val >= external_apps_address_start) and (val < external_apps_address_end) and ((val & 0xFFFF) < maximum_application_size):
|
|
print ("WARNING: External code address", hex(val), "at offset", hex(i), "in", sys.argv[3])
|
|
|
|
final_checksum = 0
|
|
checksum = (final_checksum - checksum) & 0xFFFFFFFF
|
|
|
|
spi_image += checksum.to_bytes(4, 'little')
|
|
|
|
write_image(spi_image, output_path)
|
|
|
|
percent_remaining = round(1000 * pad_size / spi_size) / 10;
|
|
print ("Space remaining in flash ROM:", pad_size, "bytes (", percent_remaining, "%)") |