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fatfsgen.py: enabled extension of the FAT table

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Closes IDF-5688
This commit is contained in:
Martin Gaňo
2022-07-29 15:19:30 +02:00
parent 06b31d487b
commit 2d173c0777
6 changed files with 25 additions and 25 deletions
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12
components/fatfs/fatfs_utils/utils.py
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@@ -70,6 +70,17 @@ def get_fatfs_type(clusters_count: int) -> int:
return FAT32
def get_fat_sectors_count(clusters_count: int, sector_size: int) -> int:
fatfs_type_ = get_fatfs_type(clusters_count)
if fatfs_type_ == FAT32:
raise NotImplementedError('FAT32 is not supported!')
# number of byte halves
cluster_s: int = fatfs_type_ // 4
fat_size_bytes: int = (
clusters_count * 2 + cluster_s) if fatfs_type_ == FAT16 else (clusters_count * 3 + 1) // 2 + cluster_s
return (fat_size_bytes + sector_size - 1) // sector_size
def required_clusters_count(cluster_size: int, content: bytes) -> int:
# compute number of required clusters for file text
return (len(content) + cluster_size - 1) // cluster_size
@@ -253,7 +264,6 @@ class FATDefaults:
FAT_TABLES_COUNT: int = 1
SECTORS_PER_CLUSTER: int = 1
SECTOR_SIZE: int = 0x1000
SECTORS_PER_FAT: int = 1
HIDDEN_SECTORS: int = 0
ENTRY_SIZE: int = 32
NUM_HEADS: int = 0xff