def _get_partition_id_from_ota_id(self, ota_id):
if isinstance(ota_id, int):
return PartitionType("app", "ota_" + str(ota_id))
else:
return PartitionName(ota_id)
def main():
COMPONENTS_PATH = os.path.expandvars(
os.path.join("$IDF_PATH", "components"))
PARTTOOL_DIR = os.path.join(COMPONENTS_PATH, "partition_table")
sys.path.append(PARTTOOL_DIR)
from parttool import PartitionName, PartitionType, ParttoolTarget
from gen_empty_partition import generate_blanked_file
parser = argparse.ArgumentParser("ESP-IDF Partitions Tool Example")
parser.add_argument(
"--port",
"-p",
help="port where the device to perform operations on is connected")
parser.add_argument("--binary",
"-b",
help="path to built example binary",
default=os.path.join("build", "parttool.bin"))
args = parser.parse_args()
target = ParttoolTarget(args.port)
# Read app partition and save the contents to a file. The app partition is identified
# using type-subtype combination
print("Checking if device app binary matches built binary")
factory = PartitionType("app", "factory")
target.read_partition(factory, "app.bin")
assert_file_same(args.binary, "app.bin",
"Device app binary does not match built binary")
# Retrieve info on data storage partition, this time identifying it by name.
storage = PartitionName("storage")
storage_info = target.get_partition_info(storage)
print("Found data partition at offset 0x{:x} with size 0x{:x}".format(
storage_info.offset, storage_info.size))
# Create a file whose contents will be written to the storage partition
with open("write.bin", "wb") as f:
# Create a file to write to the data partition with randomly generated content
f.write(os.urandom(storage_info.size))
# Write the contents of the created file to storage partition
print("Writing to data partition")
target.write_partition(storage, "write.bin")
# Read back the contents of the storage partition
print("Reading data partition")
target.read_partition(storage, "read.bin")
assert_file_same(
"write.bin", "read.bin",
"Read contents of storage partition does not match source file contents"
)
# Erase contents of the storage partition
print("Erasing data partition")
target.erase_partition(storage)
# Read back the erased data partition
print("Reading data partition")
target.read_partition(storage, "read.bin")
# Generate a file of all 0xFF
generate_blanked_file(storage_info.size, "blank.bin")
assert_file_same("blank.bin", "read.bin",
"Contents of storage partition not fully erased")
# Example end and cleanup
print("\nPartition tool operations performed successfully!")
clean_files = ["app.bin", "read.bin", "blank.bin", "write.bin"]
for clean_file in clean_files:
os.unlink(clean_file)
class OtatoolTarget():
OTADATA_PARTITION = PartitionType("data", "ota")
def __init__(self, port=None, partition_table_offset=PARTITION_TABLE_OFFSET, partition_table_file=None, spi_flash_sec_size=SPI_FLASH_SEC_SIZE):
self.target = ParttoolTarget(port, partition_table_offset, partition_table_file)
self.spi_flash_sec_size = spi_flash_sec_size
temp_file = tempfile.NamedTemporaryFile(delete=False)
temp_file.close()
try:
self.target.read_partition(OtatoolTarget.OTADATA_PARTITION, temp_file.name)
with open(temp_file.name, "rb") as f:
self.otadata = f.read()
except Exception:
self.otadata = None
finally:
os.unlink(temp_file.name)
def _check_otadata_partition(self):
if not self.otadata:
raise Exception("No otadata partition found")
def erase_otadata(self):
self._check_otadata_partition()
self.target.erase_partition(OtatoolTarget.OTADATA_PARTITION)
def _get_otadata_info(self):
info = []
otadata_info = collections.namedtuple("otadata_info", "seq crc")
for i in range(2):
start = i * (self.spi_flash_sec_size >> 1)
seq = bytearray(self.otadata[start:start + 4])
crc = bytearray(self.otadata[start + 28:start + 32])
seq = struct.unpack('>I', seq)
crc = struct.unpack('>I', crc)
info.append(otadata_info(seq[0], crc[0]))
return info
def _get_partition_id_from_ota_id(self, ota_id):
if isinstance(ota_id, int):
return PartitionType("app", "ota_" + str(ota_id))
else:
return PartitionName(ota_id)
def switch_ota_partition(self, ota_id):
self._check_otadata_partition()
sys.path.append(PARTTOOL_DIR)
import gen_esp32part as gen
def is_otadata_info_valid(status):
seq = status.seq % (1 << 32)
crc = hex(binascii.crc32(struct.pack("I", seq), 0xFFFFFFFF) % (1 << 32))
return seq < (int('0xFFFFFFFF', 16) % (1 << 32)) and status.crc == crc
partition_table = self.target.partition_table
ota_partitions = list()
for i in range(gen.NUM_PARTITION_SUBTYPE_APP_OTA):
ota_partition = filter(lambda p: p.subtype == (gen.MIN_PARTITION_SUBTYPE_APP_OTA + i), partition_table)
try:
ota_partitions.append(list(ota_partition)[0])
except IndexError:
break
ota_partitions = sorted(ota_partitions, key=lambda p: p.subtype)
if not ota_partitions:
raise Exception("No ota app partitions found")
# Look for the app partition to switch to
ota_partition_next = None
try:
if isinstance(ota_id, int):
ota_partition_next = filter(lambda p: p.subtype - gen.MIN_PARTITION_SUBTYPE_APP_OTA == ota_id, ota_partitions)
else:
ota_partition_next = filter(lambda p: p.name == ota_id, ota_partitions)
ota_partition_next = list(ota_partition_next)[0]
except IndexError:
raise Exception("Partition to switch to not found")
otadata_info = self._get_otadata_info()
# Find the copy to base the computation for ota sequence number on
otadata_compute_base = -1
# Both are valid, take the max as computation base
if is_otadata_info_valid(otadata_info[0]) and is_otadata_info_valid(otadata_info[1]):
if otadata_info[0].seq >= otadata_info[1].seq:
otadata_compute_base = 0
else:
otadata_compute_base = 1
# Only one copy is valid, use that
elif is_otadata_info_valid(otadata_info[0]):
otadata_compute_base = 0
elif is_otadata_info_valid(otadata_info[1]):
otadata_compute_base = 1
# Both are invalid (could be initial state - all 0xFF's)
else:
pass
ota_seq_next = 0
ota_partitions_num = len(ota_partitions)
target_seq = (ota_partition_next.subtype & 0x0F) + 1
# Find the next ota sequence number
if otadata_compute_base == 0 or otadata_compute_base == 1:
base_seq = otadata_info[otadata_compute_base].seq % (1 << 32)
i = 0
while base_seq > target_seq % ota_partitions_num + i * ota_partitions_num:
i += 1
ota_seq_next = target_seq % ota_partitions_num + i * ota_partitions_num
else:
ota_seq_next = target_seq
# Create binary data from computed values
ota_seq_next = struct.pack("I", ota_seq_next)
ota_seq_crc_next = binascii.crc32(ota_seq_next, 0xFFFFFFFF) % (1 << 32)
ota_seq_crc_next = struct.pack("I", ota_seq_crc_next)
temp_file = tempfile.NamedTemporaryFile(delete=False)
temp_file.close()
try:
with open(temp_file.name, "wb") as otadata_next_file:
start = (1 if otadata_compute_base == 0 else 0) * (self.spi_flash_sec_size >> 1)
otadata_next_file.write(self.otadata)
otadata_next_file.seek(start)
otadata_next_file.write(ota_seq_next)
otadata_next_file.seek(start + 28)
otadata_next_file.write(ota_seq_crc_next)
otadata_next_file.flush()
self.target.write_partition(OtatoolTarget.OTADATA_PARTITION, temp_file.name)
finally:
os.unlink(temp_file.name)
def read_ota_partition(self, ota_id, output):
self.target.read_partition(self._get_partition_id_from_ota_id(ota_id), output)
def write_ota_partition(self, ota_id, input):
self.target.write_partition(self._get_partition_id_from_ota_id(ota_id), input)
def erase_ota_partition(self, ota_id):
self.target.erase_partition(self._get_partition_id_from_ota_id(ota_id))
def main():
COMPONENTS_PATH = os.path.expandvars(
os.path.join('$IDF_PATH', 'components'))
PARTTOOL_DIR = os.path.join(COMPONENTS_PATH, 'partition_table')
sys.path.append(PARTTOOL_DIR)
from gen_empty_partition import generate_blanked_file
from parttool import PartitionName, PartitionType, ParttoolTarget
parser = argparse.ArgumentParser('ESP-IDF Partitions Tool Example')
parser.add_argument(
'--port',
'-p',
help='port where the device to perform operations on is connected')
parser.add_argument('--binary',
'-b',
help='path to built example binary',
default=os.path.join('build', 'parttool.bin'))
args = parser.parse_args()
target = ParttoolTarget(args.port)
# Read app partition and save the contents to a file. The app partition is identified
# using type-subtype combination
print('Checking if device app binary matches built binary')
factory = PartitionType('app', 'factory')
target.read_partition(factory, 'app.bin')
assert_file_same(args.binary, 'app.bin',
'Device app binary does not match built binary')
# Retrieve info on data storage partition, this time identifying it by name.
storage = PartitionName('storage')
storage_info = target.get_partition_info(storage)
print('Found data partition at offset 0x{:x} with size 0x{:x}'.format(
storage_info.offset, storage_info.size))
# Create a file whose contents will be written to the storage partition
with open('write.bin', 'wb') as f:
# Create a file to write to the data partition with randomly generated content
f.write(os.urandom(storage_info.size))
# Write the contents of the created file to storage partition
print('Writing to data partition')
target.write_partition(storage, 'write.bin')
# Read back the contents of the storage partition
print('Reading data partition')
target.read_partition(storage, 'read.bin')
assert_file_same(
'write.bin', 'read.bin',
'Read contents of storage partition does not match source file contents'
)
# Erase contents of the storage partition
print('Erasing data partition')
target.erase_partition(storage)
# Read back the erased data partition
print('Reading data partition')
target.read_partition(storage, 'read.bin')
# Generate a file of all 0xFF
generate_blanked_file(storage_info.size, 'blank.bin')
assert_file_same('blank.bin', 'read.bin',
'Contents of storage partition not fully erased')
# Example end and cleanup
print('\nPartition tool operations performed successfully!')
clean_files = ['app.bin', 'read.bin', 'blank.bin', 'write.bin']
for clean_file in clean_files:
os.unlink(clean_file)