52 lines
2.4 KiB
C
52 lines
2.4 KiB
C
#ifndef EMBPART_FAT32_H
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#define EMBPART_FAT32_H
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#include <stdint.h>
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typedef struct {
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uint8_t boot_jump[3]; // jump instruction used for bootable volume
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uint8_t formatter_name[8]; // identification of application or OS formatted this device
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uint16_t bytes_per_sector; // number of bytes per sector
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uint8_t sectors_per_cluster; // number of sectors per cluster
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uint16_t n_reserved_sectors; // number of reserved sectors
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uint8_t n_fats; // number of FAT copies
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uint8_t _unused0[2];
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uint8_t _unused1[2];
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uint8_t media_descriptor; // media descriptor differentiating between removable and non-removable devices
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uint8_t _unused2[2];
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uint16_t sectors_per_track; // number of sectors per track
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uint16_t n_heads; // number of heads
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uint32_t n_hidden_sectors; // number of hidden sectors preceding this volume
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uint32_t n_total_sectors; // total number of sectors in this volume
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uint32_t n_sectors_per_fat; // number of sectors per FAT
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uint16_t flags; // flags, see docs.
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uint16_t version; // FAT version number
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uint32_t root_first_cluster; // first cluster of the root directory
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uint16_t fsinfo_sector; // sector of the FSINFO structure
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uint16_t boot_backup_sector; // sector of backup boot code in the reserved region
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uint8_t _reserved0[12];
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uint8_t logical_driver_number; // logical drive number of the partition
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uint8_t _reserved1;
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uint8_t extended_boot_signature; // extended boot signature
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uint32_t volume_serial_number; // volume serial number
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uint8_t volume_label[11]; // volume label string
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uint8_t fs_type[8]; // file system type ("FAT32")
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} __attribute__((packed)) Bpb_Fat32;
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typedef struct {
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uint32_t bpb_s; // sector of bios parameter block
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uint32_t fat_s; // first sector of the FAT area
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uint32_t root_s; // first sector of root directory
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uint32_t data_s; // first sector of the data area (~volume)
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uint32_t serial_number; // serial number of the volume
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uint32_t sectors_per_fat; // sectors per FAT table
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uint16_t bytes_per_sector; // number of bytes creating a sector
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uint16_t sectors_per_cluster; // number of sectors creating a cluster
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uint8_t fat_copies; // number of FAT table copies
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uint8_t volume_label[11]; // pointer to volume label
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} Fat32_CtrlBlock;
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int fat32_load(Fat32_CtrlBlock *ctrl, const uint8_t *bpb, uint32_t bpb_s);
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#endif //EMBPART_FAT32_H
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