kopia lustrzana https://github.com/espressif/esp-idf
213 wiersze
7.6 KiB
Python
213 wiersze
7.6 KiB
Python
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#!/usr/bin/env python
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#
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# Copyright 2020 Espressif Systems (Shanghai) CO LTD
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from __future__ import division
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import argparse
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import hashlib
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import json
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import os
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import struct
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from functools import partial
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from future.utils import iteritems
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try:
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from itertools import izip as zip
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except ImportError:
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# Python 3
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pass
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def round_up_int_div(n, d):
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# equivalent to math.ceil(n / d)
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return (n + d - 1) // d
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class UF2Writer(object):
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# The UF2 format is described here: https://github.com/microsoft/uf2
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UF2_BLOCK_SIZE = 512
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UF2_DATA_SIZE = 476 # max value of CHUNK_SIZE reduced by optional parts. Currently, MD5_PART only.
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UF2_MD5_PART_SIZE = 24
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UF2_FIRST_MAGIC = 0x0A324655
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UF2_SECOND_MAGIC = 0x9E5D5157
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UF2_FINAL_MAGIC = 0x0AB16F30
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UF2_FLAG_FAMILYID_PRESENT = 0x00002000
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UF2_FLAG_MD5_PRESENT = 0x00004000
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def __init__(self, chip_id, output_file, chunk_size):
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self.chip_id = chip_id
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self.CHUNK_SIZE = self.UF2_DATA_SIZE - self.UF2_MD5_PART_SIZE if chunk_size is None else chunk_size
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self.f = open(output_file, 'wb')
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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if self.f:
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self.f.close()
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@staticmethod
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def _to_uint32(num):
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return struct.pack('<I', num)
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def _write_block(self, addr, chunk, len_chunk, block_no, blocks):
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assert len_chunk > 0
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assert len_chunk <= self.CHUNK_SIZE
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assert block_no < blocks
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block = self._to_uint32(self.UF2_FIRST_MAGIC)
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block += self._to_uint32(self.UF2_SECOND_MAGIC)
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block += self._to_uint32(self.UF2_FLAG_FAMILYID_PRESENT | self.UF2_FLAG_MD5_PRESENT)
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block += self._to_uint32(addr)
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block += self._to_uint32(len_chunk)
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block += self._to_uint32(block_no)
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block += self._to_uint32(blocks)
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block += self._to_uint32(self.chip_id)
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block += chunk
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md5_part = self._to_uint32(addr)
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md5_part += self._to_uint32(len_chunk)
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md5_part += hashlib.md5(chunk).digest()
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assert(len(md5_part) == self.UF2_MD5_PART_SIZE)
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block += md5_part
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block += b'\x00' * (self.UF2_DATA_SIZE - self.UF2_MD5_PART_SIZE - len_chunk)
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block += self._to_uint32(self.UF2_FINAL_MAGIC)
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assert len(block) == self.UF2_BLOCK_SIZE
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self.f.write(block)
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def add_file(self, addr, f_path):
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blocks = round_up_int_div(os.path.getsize(f_path), self.CHUNK_SIZE)
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with open(f_path, 'rb') as fin:
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a = addr
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for i, chunk in enumerate(iter(partial(fin.read, self.CHUNK_SIZE), b'')):
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len_chunk = len(chunk)
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self._write_block(a, chunk, len_chunk, i, blocks)
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a += len_chunk
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def action_write(args):
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with UF2Writer(args['chip_id'], args['output_file'], args['chunk_size']) as writer:
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for addr, f in args['files']:
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print('Adding {} at {:#x}'.format(f, addr))
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writer.add_file(addr, f)
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print('"{}" has been written.'.format(args['output_file']))
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def main():
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parser = argparse.ArgumentParser()
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def four_byte_aligned(integer):
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return integer & 3 == 0
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def parse_chunk_size(string):
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num = int(string, 0)
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if not four_byte_aligned(num):
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raise argparse.ArgumentTypeError('Chunk size should be a 4-byte aligned number')
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return num
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def parse_chip_id(string):
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num = int(string, 16)
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if num < 0 or num > 0xFFFFFFFF:
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raise argparse.ArgumentTypeError('Chip ID should be a 4-byte unsigned integer')
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return num
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# Provision to add "info" command
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subparsers = parser.add_subparsers(dest="command")
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write_parser = subparsers.add_parser("write")
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write_parser.add_argument("-o", "--output-file",
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help='Filename for storing the output UF2 image',
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required=True)
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write_parser.add_argument("--chip-id",
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required=True,
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type=parse_chip_id,
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help='Hexa-decimal chip identificator')
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write_parser.add_argument("--chunk-size",
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required=False,
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type=parse_chunk_size,
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default=None,
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help='Specify the used data part of the 512 byte UF2 block. A common value is 256. By '
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'default the largest possible value will be used.')
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write_parser.add_argument("--json",
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help='Optional file for loading "flash_files" dictionary with <address> <file> items')
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write_parser.add_argument("--bin",
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help='Use only a subset of binaries from the JSON file, e.g. "partition_table '
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'bootloader app"',
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nargs='*')
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write_parser.add_argument("files",
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metavar="<address> <file>", help='Add <file> at <address>',
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nargs="*")
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args = parser.parse_args()
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def check_file(file_name):
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if not os.path.isfile(file_name):
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raise RuntimeError('{} is not a regular file!'.format(file_name))
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return file_name
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def parse_addr(string):
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num = int(string, 0)
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if not four_byte_aligned(num):
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raise RuntimeError('{} is not a 4-byte aligned valid address'.format(string))
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return num
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files = []
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if args.files:
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files += [(parse_addr(addr), check_file(f_name)) for addr, f_name in zip(args.files[::2], args.files[1::2])]
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if args.json:
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json_dir = os.path.dirname(os.path.abspath(args.json))
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def process_json_file(path):
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'''
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The input path is relative to json_dir. This function makes it relative to the current working
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directory.
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'''
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return check_file(os.path.relpath(os.path.join(json_dir, path), start=os.curdir))
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with open(args.json) as f:
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json_content = json.load(f)
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if args.bin:
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try:
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bin_selection = [json_content[b] for b in args.bin]
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flash_dic = dict((x['offset'], x['file']) for x in bin_selection)
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except KeyError:
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print('Invalid binary was selected.')
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valid = [k if all(x in v for x in ('offset', 'file')) else None for k, v in iteritems(json_content)]
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print('Valid ones:', ' '.join(x for x in valid if x))
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exit(1)
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else:
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flash_dic = json_content['flash_files']
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files += [(parse_addr(addr), process_json_file(f_name)) for addr, f_name in iteritems(flash_dic)]
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files = sorted([(addr, f_name) for addr, f_name in iteritems(dict(files))],
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key=lambda x: x[0]) # remove possible duplicates and sort based on the address
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cmd_args = {'output_file': args.output_file,
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'files': files,
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'chip_id': args.chip_id,
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'chunk_size': args.chunk_size,
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}
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{'write': action_write
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}[args.command](cmd_args)
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if __name__ == "__main__":
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main()
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