fat32_fsinfo Struct Reference

FSINFO sector for a FAT32 volume. More...

#include <FatStructs.h>

Public Attributes
uint32_t	freeCount
uint32_t	leadSignature
uint32_t	nextFree
uint8_t	reserved1 [480]
uint8_t	reserved2 [12]
uint32_t	structSignature
uint8_t	tailSignature [4]

Detailed Description

FSINFO sector for a FAT32 volume.

Member Data Documentation

uint32_t fat32_fsinfo::freeCount

Contains the last known free cluster count on the volume. If the value is 0xFFFFFFFF, then the free count is unknown and must be computed. Any other value can be used, but is not necessarily correct. It should be range checked at least to make sure it is <= volume cluster count.

uint32_t fat32_fsinfo::leadSignature

must be 0X52, 0X52, 0X61, 0X41

uint32_t fat32_fsinfo::nextFree

This is a hint for the FAT driver. It indicates the cluster number at which the driver should start looking for free clusters. If the value is 0xFFFFFFFF, then there is no hint and the driver should start looking at cluster 2.

uint8_t fat32_fsinfo::reserved1[480]

must be zero

uint8_t fat32_fsinfo::reserved2[12]

must be zero

uint32_t fat32_fsinfo::structSignature

must be 0X72, 0X72, 0X41, 0X61

uint8_t fat32_fsinfo::tailSignature[4]

must be 0X00, 0X00, 0X55, 0XAA

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The documentation for this struct was generated from the following file:

• Arduino/libraries/SdFat/utility/FatStructs.h