PHAT32 Support

PHAT32 specific routines. More...

Collaboration diagram for PHAT32 Support:

Defines
#define	PHAT32CMASK   0x0FFFFFFF
Functions
uint32_t	Phat32FreeClusters (NUTDEVICE *dev)
	Counts the number of free clusters in a fat32 volume, fast version.
int	Phat32GetClusterLink (NUTDEVICE *dev, uint32_t clust, uint32_t *link)
	Get link value of a specified cluster.
int	Phat32SetClusterLink (NUTDEVICE *dev, uint32_t clust, uint32_t link)
	Set link value of a specified cluster.
int	Phat32ReleaseChain (NUTDEVICE *dev, uint32_t first)
	Release a cluster chain.

---

Detailed Description

PHAT32 specific routines.

---

Define Documentation

#define PHAT32CMASK   0x0FFFFFFF

Referenced by AllocFirstCluster(), Phat32FreeClusters(), Phat32GetClusterLink(), Phat32ReleaseChain(), Phat32SetClusterLink(), PhatFilePosSet(), PhatFileRead(), and PhatFileWrite().

---

Function Documentation

uint32_t Phat32FreeClusters

(

NUTDEVICE *

dev

)

Counts the number of free clusters in a fat32 volume, fast version.

Parameters:

dev	Specifies the file system device.

Returns:

The number of free clusters.

References _NUTDEVICE::dev_dcb, PHAT32CMASK, PHATEOC, PhatSectorBufferRelease(), PhatSectorLoad(), rc, _PHATSECTBUF::sect_data, _PHATVOL::vol_buf, _PHATVOL::vol_last_clust, _PHATVOL::vol_sectsz, and _PHATVOL::vol_tab_sect.

Here is the call graph for this function:

int Phat32GetClusterLink	(	NUTDEVICE *	dev,
		uint32_t	clust,
		uint32_t *	link
	)

Get link value of a specified cluster.

Parameters:

dev	Specifies the file system device.
clust	Get the link of this cluster.
link	Pointer to a variable which will receive the link.

Returns:

0 on success or -1 on failure.

References _NUTDEVICE::dev_dcb, PHAT32CMASK, PHATEOC, PhatSectorBufferRelease(), PhatSectorLoad(), _PHATSECTBUF::sect_data, and _PHATVOL::vol_buf.

Referenced by Phat32ReleaseChain(), PhatFilePosSet(), PhatFileRead(), and PhatFileWrite().

Here is the call graph for this function:

int Phat32SetClusterLink	(	NUTDEVICE *	dev,
		uint32_t	clust,
		uint32_t	link
	)

Set link value of a specified cluster.

Parameters:

dev	Specifies the file system device.
clust	This cluster will be linked.
link	Link to this cluster.

Returns:

0 on success or -1 on failure.

References _NUTDEVICE::dev_dcb, PHAT32CMASK, PhatSectorBufferRelease(), PhatSectorLoad(), _PHATSECTBUF::sect_data, _PHATSECTBUF::sect_dirty, _PHATVOL::vol_buf, and _PHATVOL::vol_tab_sect.

Referenced by AllocFirstCluster(), and Phat32ReleaseChain().

Here is the call graph for this function:

int Phat32ReleaseChain	(	NUTDEVICE *	dev,
		uint32_t	first
	)

Release a cluster chain.

Parameters:

dev	Specifies the file system device.
first	First cluster of the chain to release.

Returns:

0 on success or -1 on failure.

References _NUTDEVICE::dev_dcb, PHAT32CMASK, Phat32GetClusterLink(), Phat32SetClusterLink(), PHATEOC, and _PHATVOL::vol_numfree.

Referenced by PhatDirReleaseChain().

Here is the call graph for this function: