fat32_fsinfo Struct Reference

FSINFO sector for a FAT32 volume. More...

#include <SdFat.h>

Data Fields
uint32_t	leadSignature
uint8_t	reserved1 [480]
uint32_t	structSignature
uint32_t	freeCount
uint32_t	nextFree
uint8_t	reserved2 [12]
uint8_t	tailSignature [4]

---

Detailed Description

FSINFO sector for a FAT32 volume.

---

Field Documentation

uint32_t 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 leadSignature

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

uint32_t 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 reserved1[480]

must be zero

uint8_t reserved2[12]

must be zero

uint32_t structSignature

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

uint8_t tailSignature[4]

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

---

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

• src/ArduinoAVR/Repetier/SdFat.h