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fatfsgen.py: Support for detection of minimal partition size

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This commit is contained in:
Martin Gaňo
2022-09-14 12:26:25 +02:00
parent bea755605e
commit 21408698e1
2 changed files with 51 additions and 3 deletions
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7
components/fatfs/fatfs_utils/utils.py
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@@ -14,6 +14,7 @@ from construct import BitsInteger, BitStruct, Int16ul
# the regex pattern defines symbols that are allowed by long file names but not by short file names
INVALID_SFN_CHARS_PATTERN = re.compile(r'[.+,;=\[\]]')
FATFS_MIN_ALLOC_UNIT: int = 128
FAT12_MAX_CLUSTERS: int = 4085
FAT16_MAX_CLUSTERS: int = 65525
RESERVED_CLUSTERS_COUNT: int = 2
@@ -174,7 +175,9 @@ def get_args_for_partition_generator(desc: str, wl: bool) -> argparse.Namespace:
help='Filename of the generated fatfs image')
parser.add_argument('--partition_size',
default=FATDefaults.SIZE,
help='Size of the partition in bytes')
help='Size of the partition in bytes.' +
('' if wl else ' Use `--partition_size detect` for detecting the minimal partition size.')
)
parser.add_argument('--sector_size',
default=FATDefaults.SECTOR_SIZE,
type=int,
@@ -207,6 +210,8 @@ def get_args_for_partition_generator(desc: str, wl: bool) -> argparse.Namespace:
args = parser.parse_args()
if args.fat_type == 0:
args.fat_type = None
if args.partition_size == 'detect' and not wl:
args.partition_size = -1
args.partition_size = int(str(args.partition_size), 0)
if not os.path.isdir(args.input_directory):
raise NotADirectoryError(f'The target directory `{args.input_directory}` does not exist!')