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Minor documentation improvements.

This commit is contained in:
Dean Camera 2013-03-29 10:29:11 +00:00
parent 83d5c4729e
commit 907cb2459c
2 changed files with 19 additions and 14 deletions
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9
Bootloaders/MassStorage/BootloaderMassStorage.txt
View File

@ -171,16 +171,9 @@
* \par In some cases, the application is not fully loaded into the device.
* Write-caching on some operating systems may interfere with the normal
* operation of the bootloader. Write caching should be disabled when using the
* Mass Storage bootloader, or the filesystem synced via an appropriate command
* Mass Storage bootloader, or the file system synced via an appropriate command
* (such as the OS's normal disk ejection command) before disconnecting the device.
*
* \par On Linux machines, written data may be corrupted.
* Linux systems appear to attempt a full filesystem re-write when the virtual
* firmware file of the bootloader is written to normally, causing corrupt
* device programming. On Linux systems, new firmware should be copied over
* in-place via the \c dd command on the virtual file to ensure the filesystem
* is left intact.
*
* \par After loading an application, it is not run automatically on startup.
* Some USB AVR boards ship with the BOOTRST fuse set, causing the bootloader
* to run automatically when the device is reset. In most cases, the BOOTRST

24
Bootloaders/MassStorage/Lib/VirtualFAT.h
View File

@ -122,29 +122,41 @@
//@}
/* Enums: */
/** Enum for the Root FAT file entry indexes on the disk. This can be used
* to retrieve the current contents of a known directory entry.
*/
enum
{
/** Volume ID directory entry, giving the name of the virtual disk. */
DISK_FILE_ENTRY_VolumeID = 0,
/** Long File Name FAT file entry of the virtual firmware image file. */
DISK_FILE_ENTRY_FirmwareLFN = 1,
/** Legacy MSDOS FAT file entry of the virtual firmware image file. */
DISK_FILE_ENTRY_FirmwareMSDOS = 2,
};
/** Enum for the physical disk blocks of the virtual disk. */
enum
{
/** Boot sector disk block. */
DISK_BLOCK_BootBlock = 0,
/** First copy of the FAT table block. */
DISK_BLOCK_FATBlock1 = 1,
/** Second copy of the FAT table block. */
DISK_BLOCK_FATBlock2 = 2,
/** Root file and directory entries block. */
DISK_BLOCK_RootFilesBlock = 3,
/** Start block of the disk data section. */
DISK_BLOCK_DataStartBlock = 4,
};
/* Type Definitions: */
/** FAT boot block structure definition, used to identify the core
* parameters of a FAT filesystem stored on a disk.
* parameters of a FAT file system stored on a disk.
*
* \note This definition is truncated to save space; the magic signature
* 0xAA55 must be appended to the very end of the block for it to
* be detected by the host as a valid boot block.
* \c 0xAA55 must be appended to the very end of the block for it
* to be detected by the host as a valid boot block.
*/
typedef struct
{
@ -176,7 +188,7 @@
*/
typedef union
{
/** FAT Long File Name directory entry. */
/** VFAT Long File Name file entry. */
struct
{
uint8_t Ordinal;
@ -199,7 +211,7 @@
uint16_t Unicode13;
} VFAT_LongFileName;
/** FAT MSDOS 8.3 legacy file entry. */
/** Legacy FAT MSDOS 8.3 file entry. */
struct
{
uint8_t Filename[8];
@ -212,7 +224,7 @@
uint32_t FileSizeBytes;
} MSDOS_File;
/** FAT MSDOS (sub-)directory entry. */
/** Legacy FAT MSDOS (sub-)directory entry. */
struct
{
uint8_t Name[11];