/*
LUFA Library
- Copyright (C) Dean Camera, 2013.
+ Copyright (C) Dean Camera, 2015.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
- Copyright 2013 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2015 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
#include "../BootloaderAPI.h"
/* Macros: */
- /** Size of the virtual FIRMWARE.BIN file in bytes. */
- #define FIRMWARE_FILE_SIZE_BYTES (FLASHEND - (FLASHEND - BOOT_START_ADDR) - AUX_BOOT_SECTION_SIZE)
+ /** Size of the virtual FLASH.BIN file in bytes. */
+ #define FLASH_FILE_SIZE_BYTES (FLASHEND - (FLASHEND - BOOT_START_ADDR) - AUX_BOOT_SECTION_SIZE)
+
+ /** Size of the virtual EEPROM.BIN file in bytes. */
+ #define EEPROM_FILE_SIZE_BYTES E2END
/** Number of sectors that comprise a single logical disk cluster. */
#define SECTOR_PER_CLUSTER 4
#define FILE_CLUSTERS(size) ((size / CLUSTER_SIZE_BYTES) + ((size % CLUSTER_SIZE_BYTES) ? 1 : 0))
/** Total number of logical sectors/blocks on the disk. */
- #define LUN_MEDIA_BLOCKS (FILE_SECTORS(FIRMWARE_FILE_SIZE_BYTES) + 32)
+ #define LUN_MEDIA_BLOCKS (FILE_SECTORS(FLASH_FILE_SIZE_BYTES) + FILE_SECTORS(EEPROM_FILE_SIZE_BYTES) + 32)
/** Converts a given time in HH:MM:SS format to a FAT filesystem time.
*
*/
#define FAT_DATE(dd, mm, yyyy) (((yyyy - 1980) << 9) | (mm << 5) | (dd << 0))
+ /** Bit-rotates a given 8-bit value once to the right.
+ *
+ * \param[in] x Value to rotate right once
+ *
+ * \return Bit-rotated input value, rotated once to the right.
+ */
+ #define ROT8(x) ((((x) & 0xFE) >> 1) | (((x) & 1) ? 0x80 : 0x00))
+
+ /** Computes the LFN entry checksum of a MSDOS 8.3 format file entry,
+ * to associate a LFN entry with its short file entry.
+ *
+ * \param[in] n0 MSDOS Filename character 1
+ * \param[in] n1 MSDOS Filename character 2
+ * \param[in] n2 MSDOS Filename character 3
+ * \param[in] n3 MSDOS Filename character 4
+ * \param[in] n4 MSDOS Filename character 5
+ * \param[in] n5 MSDOS Filename character 6
+ * \param[in] n6 MSDOS Filename character 7
+ * \param[in] n7 MSDOS Filename character 8
+ * \param[in] e0 MSDOS Extension character 1
+ * \param[in] e1 MSDOS Extension character 2
+ * \param[in] e2 MSDOS Extension character 3
+ *
+ * \return LFN checksum of the given MSDOS 8.3 filename.
+ */
+ #define FAT_CHECKSUM(n0, n1, n2, n3, n4, n5, n6, n7, e0, e1, e2) \
+ (uint8_t)(ROT8(ROT8(ROT8(ROT8(ROT8(ROT8(ROT8(ROT8(ROT8(ROT8(n0)+n1)+n2)+n3)+n4)+n5)+n6)+n7)+e0)+e1)+e2)
+
+ /** \name FAT Filesystem Flags */
+ //@{
+ /** FAT attribute flag to indicate a read-only file. */
+ #define FAT_FLAG_READONLY (1 << 0)
+
+ /** FAT attribute flag to indicate a hidden file. */
+ #define FAT_FLAG_HIDDEN (1 << 1)
+
+ /** FAT attribute flag to indicate a system file. */
+ #define FAT_FLAG_SYSTEM (1 << 2)
+
+ /** FAT attribute flag to indicate a Volume name entry. */
+ #define FAT_FLAG_VOLUME_NAME (1 << 3)
+
+ /** FAT attribute flag to indicate a directory entry. */
+ #define FAT_FLAG_DIRECTORY (1 << 4)
+
+ /** FAT attribute flag to indicate a file ready for archiving. */
+ #define FAT_FLAG_ARCHIVE (1 << 5)
+
+ /** FAT pseudo-attribute flag to indicate a Long File Name entry. */
+ #define FAT_FLAG_LONG_FILE_NAME 0x0F
+
+ /** Ordinal flag marker for FAT Long File Name entries to mark the last entry. */
+ #define FAT_ORDINAL_LAST_ENTRY (1 << 6)
+ //@}
+
+ /* 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 FLASH.BIN image file. */
+ DISK_FILE_ENTRY_FLASH_LFN = 1,
+ /** Legacy MSDOS FAT file entry of the virtual FLASH.BIN image file. */
+ DISK_FILE_ENTRY_FLASH_MSDOS = 2,
+ /** Long File Name FAT file entry of the virtual EEPROM.BIN image file. */
+ DISK_FILE_ENTRY_EEPROM_LFN = 3,
+ /** Legacy MSDOS FAT file entry of the virtual EEPROM.BIN image file. */
+ DISK_FILE_ENTRY_EEPROM_MSDOS = 4,
+ };
+
+ /** 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
{
/* uint16_t MagicSignature; */
} FATBootBlock_t;
- /** FAT legacy 8.3 style directory entry structure definition, used to
- * identify the files and folders of FAT filesystem stored on a disk.
+ /** FAT directory entry structure, for the various kinds of File and
+ * directory descriptors on a FAT disk.
*/
- typedef struct
+ typedef union
{
- uint8_t Filename[8];
- uint8_t Extension[3];
- uint8_t Attributes;
- uint8_t Reserved[10];
- uint16_t CreationTime;
- uint16_t CreationDate;
- uint16_t StartingCluster;
- uint32_t FileSizeBytes;
+ /** VFAT Long File Name file entry. */
+ struct
+ {
+ uint8_t Ordinal;
+ uint16_t Unicode1;
+ uint16_t Unicode2;
+ uint16_t Unicode3;
+ uint16_t Unicode4;
+ uint16_t Unicode5;
+ uint8_t Attribute;
+ uint8_t Reserved1;
+ uint8_t Checksum;
+ uint16_t Unicode6;
+ uint16_t Unicode7;
+ uint16_t Unicode8;
+ uint16_t Unicode9;
+ uint16_t Unicode10;
+ uint16_t Unicode11;
+ uint16_t Reserved2;
+ uint16_t Unicode12;
+ uint16_t Unicode13;
+ } VFAT_LongFileName;
+
+ /** Legacy FAT MSDOS 8.3 file entry. */
+ struct
+ {
+ uint8_t Filename[8];
+ uint8_t Extension[3];
+ uint8_t Attributes;
+ uint8_t Reserved[10];
+ uint16_t CreationTime;
+ uint16_t CreationDate;
+ uint16_t StartingCluster;
+ uint32_t FileSizeBytes;
+ } MSDOS_File;
+
+ /** Legacy FAT MSDOS (sub-)directory entry. */
+ struct
+ {
+ uint8_t Name[11];
+ uint8_t Attributes;
+ uint8_t Reserved[10];
+ uint16_t CreationTime;
+ uint16_t CreationDate;
+ uint16_t StartingCluster;
+ uint32_t Reserved2;
+ } MSDOS_Directory;
} FATDirectoryEntry_t;
/* Function Prototypes: */
#if defined(INCLUDE_FROM_VIRTUAL_FAT_C)
+ static uint8_t ReadEEPROMByte(const uint8_t* const Address) ATTR_NO_INLINE;
+
+ static void WriteEEPROMByte(uint8_t* const Address,
+ const uint8_t Data) ATTR_NO_INLINE;
+
static void UpdateFAT12ClusterEntry(uint8_t* const FATTable,
const uint16_t Index,
const uint16_t ChainEntry) AUX_BOOT_SECTION;
- static void WriteVirtualBlock(const uint16_t BlockNumber) AUX_BOOT_SECTION;
- static void ReadVirtualBlock(const uint16_t BlockNumber) AUX_BOOT_SECTION;
+
+ static void UpdateFAT12ClusterChain(uint8_t* const FATTable,
+ const uint16_t StartIndex,
+ const uint8_t ChainLength) AUX_BOOT_SECTION;
+
+ static void ReadWriteFLASHFileBlock(const uint16_t BlockNumber,
+ uint8_t* BlockBuffer,
+ const bool Read) AUX_BOOT_SECTION;
+
+ static void ReadWriteEEPROMFileBlock(const uint16_t BlockNumber,
+ uint8_t* BlockBuffer,
+ const bool Read) AUX_BOOT_SECTION;
#endif
- void VirtualFAT_WriteBlocks(const uint16_t BlockAddress,
- uint16_t TotalBlocks) AUX_BOOT_SECTION;
+ void VirtualFAT_WriteBlock(const uint16_t BlockNumber) AUX_BOOT_SECTION;
+ void VirtualFAT_ReadBlock(const uint16_t BlockNumber) AUX_BOOT_SECTION;
- void VirtualFAT_ReadBlocks(const uint16_t BlockAddress,
- uint16_t TotalBlocks) AUX_BOOT_SECTION;
#endif
projects / pub / USBasp.git / blobdiff