OVMS3-idf/components/partition_table/parttool.py

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#!/usr/bin/env python
#
# parttool is used to perform partition level operations - reading,
# writing, erasing and getting info about the partition.
#
# Copyright 2018 Espressif Systems (Shanghai) PTE LTD
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http:#www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import print_function, division
import argparse
import os
import sys
import subprocess
import tempfile
import gen_esp32part as gen
__version__ = '1.0'
IDF_COMPONENTS_PATH = os.path.expandvars(os.path.join("$IDF_PATH", "components"))
ESPTOOL_PY = os.path.join(IDF_COMPONENTS_PATH, "esptool_py", "esptool", "esptool.py")
quiet = False
def status(msg):
""" Print status message to stderr """
if not quiet:
print(msg)
def _invoke_esptool(esptool_args, args):
m_esptool_args = [sys.executable, ESPTOOL_PY]
if args.port != "":
m_esptool_args.extend(["--port", args.port])
m_esptool_args.extend(esptool_args)
if quiet:
with open(os.devnull, "w") as fnull:
subprocess.check_call(m_esptool_args, stdout=fnull, stderr=fnull)
else:
subprocess.check_call(m_esptool_args)
def _get_partition_table(args):
partition_table = None
gen.offset_part_table = int(args.partition_table_offset, 0)
if args.partition_table_file:
status("Reading partition table from partition table file...")
try:
with open(args.partition_table_file, "rb") as partition_table_file:
partition_table = gen.PartitionTable.from_binary(partition_table_file.read())
status("Partition table read from binary file {}".format(partition_table_file.name))
except (gen.InputError, TypeError):
with open(args.partition_table_file, "r") as partition_table_file:
partition_table_file.seek(0)
partition_table = gen.PartitionTable.from_csv(partition_table_file.read())
status("Partition table read from CSV file {}".format(partition_table_file.name))
else:
port_info = (" on port " + args.port if args.port else "")
status("Reading partition table from device{}...".format(port_info))
f_name = None
with tempfile.NamedTemporaryFile(delete=False) as f:
f_name = f.name
try:
invoke_args = ["read_flash", str(gen.offset_part_table), str(gen.MAX_PARTITION_LENGTH), f_name]
_invoke_esptool(invoke_args, args)
with open(f_name, "rb") as f:
partition_table = gen.PartitionTable.from_binary(f.read())
status("Partition table read from device" + port_info)
finally:
os.unlink(f_name)
return partition_table
def _get_partition(args):
partition_table = _get_partition_table(args)
partition = None
if args.partition_name:
partition = partition_table.find_by_name(args.partition_name)
elif args.partition_type and args.partition_subtype:
partition = partition_table.find_by_type(args.partition_type, args.partition_subtype)
elif args.partition_boot_default:
search = ["factory"] + ["ota_{}".format(d) for d in range(16)]
for subtype in search:
partition = partition_table.find_by_type("app", subtype)
if partition is not None:
break
else:
raise RuntimeError("Invalid partition selection arguments. Specify --partition-name OR \
--partition-type and --partition-subtype OR --partition--boot-default.")
if partition:
status("Found partition {}".format(str(partition)))
return partition
def _get_and_check_partition(args):
partition = None
partition = _get_partition(args)
if not partition:
raise RuntimeError("Unable to find specified partition.")
return partition
def write_partition(args):
erase_partition(args)
partition = _get_and_check_partition(args)
status("Checking input file size...")
with open(args.input, "rb") as input_file:
content_len = len(input_file.read())
if content_len != partition.size:
status("File size (0x{:x}) does not match partition size (0x{:x})".format(content_len, partition.size))
else:
status("File size matches partition size (0x{:x})".format(partition.size))
_invoke_esptool(["write_flash", str(partition.offset), args.input], args)
status("Written contents of file '{}' to device at offset 0x{:x}".format(args.input, partition.offset))
def read_partition(args):
partition = _get_and_check_partition(args)
_invoke_esptool(["read_flash", str(partition.offset), str(partition.size), args.output], args)
status("Read partition contents from device at offset 0x{:x} to file '{}'".format(partition.offset, args.output))
def erase_partition(args):
partition = _get_and_check_partition(args)
_invoke_esptool(["erase_region", str(partition.offset), str(partition.size)], args)
status("Erased partition at offset 0x{:x} on device".format(partition.offset))
def get_partition_info(args):
partition = None
if args.table:
partition_table = _get_partition_table(args)
if args.table.endswith(".csv"):
partition_table = partition_table.to_csv()
else:
partition_table = partition_table.to_binary()
with open(args.table, "wb") as table_file:
table_file.write(partition_table)
status("Partition table written to " + table_file.name)
else:
partition = _get_partition(args)
if partition:
info_dict = {
"offset": '0x{:x}'.format(partition.offset),
"size": '0x{:x}'.format(partition.size)
}
infos = []
try:
for info in args.info:
infos += [info_dict[info]]
except KeyError:
raise RuntimeError("Request for unknown partition info {}".format(info))
status("Requested partition information [{}]:".format(", ".join(args.info)))
print(" ".join(infos))
else:
status("Partition not found")
def generate_blank_partition_file(args):
output = None
stdout_binary = None
partition = _get_and_check_partition(args)
output = b"\xFF" * partition.size
try:
stdout_binary = sys.stdout.buffer # Python 3
except AttributeError:
stdout_binary = sys.stdout
with stdout_binary if args.output == "" else open(args.output, 'wb') as f:
f.write(output)
status("Blank partition file '{}' generated".format(args.output))
def main():
global quiet
parser = argparse.ArgumentParser("ESP-IDF Partitions Tool")
parser.add_argument("--quiet", "-q", help="suppress stderr messages", action="store_true")
# There are two possible sources for the partition table: a device attached to the host
# or a partition table CSV/binary file. These sources are mutually exclusive.
partition_table_info_source_args = parser.add_mutually_exclusive_group()
partition_table_info_source_args.add_argument("--port", "-p", help="port where the device to read the partition table from is attached", default="")
partition_table_info_source_args.add_argument("--partition-table-file", "-f", help="file (CSV/binary) to read the partition table from")
parser.add_argument("--partition-table-offset", "-o", help="offset to read the partition table from", default="0x8000")
# Specify what partition to perform the operation on. This can either be specified using the
# partition name or the first partition that matches the specified type/subtype
partition_selection_args = parser.add_mutually_exclusive_group()
partition_selection_args.add_argument("--partition-name", "-n", help="name of the partition")
partition_selection_args.add_argument("--partition-type", "-t", help="type of the partition")
partition_selection_args.add_argument('--partition-boot-default', "-d", help='select the default boot partition \
using the same fallback logic as the IDF bootloader', action="store_true")
parser.add_argument("--partition-subtype", "-s", help="subtype of the partition")
subparsers = parser.add_subparsers(dest="operation", help="run parttool -h for additional help")
# Specify the supported operations
read_part_subparser = subparsers.add_parser("read_partition", help="read partition from device and dump contents into a file")
read_part_subparser.add_argument("--output", help="file to dump the read partition contents to")
write_part_subparser = subparsers.add_parser("write_partition", help="write contents of a binary file to partition on device")
write_part_subparser.add_argument("--input", help="file whose contents are to be written to the partition offset")
subparsers.add_parser("erase_partition", help="erase the contents of a partition on the device")
print_partition_info_subparser = subparsers.add_parser("get_partition_info", help="get partition information")
print_partition_info_subparser_info_type = print_partition_info_subparser.add_mutually_exclusive_group()
print_partition_info_subparser_info_type.add_argument("--info", help="type of partition information to get",
choices=["offset", "size"], default=["offset", "size"], nargs="+")
print_partition_info_subparser_info_type.add_argument("--table", help="dump the partition table to a file")
generate_blank_subparser = subparsers.add_parser("generate_blank_partition_file", help="generate a blank (all 0xFF) partition file of \
the specified partition that can be flashed to the device")
generate_blank_subparser.add_argument("--output", help="blank partition file filename")
args = parser.parse_args()
quiet = args.quiet
# No operation specified, display help and exit
if args.operation is None:
if not quiet:
parser.print_help()
sys.exit(1)
# Else execute the operation
operation_func = globals()[args.operation]
if quiet:
# If exceptions occur, suppress and exit quietly
try:
operation_func(args)
except Exception:
sys.exit(2)
else:
operation_func(args)
if __name__ == '__main__':
main()