/*
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. */
//@}
/* 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,
- DISK_FILE_ENTRY_FirmwareLFN = 1,
- DISK_FILE_ENTRY_FirmwareMSDOS = 2,
+ /** 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
{
- DISK_BLOCK_BootBlock = 0,
- DISK_BLOCK_FATBlock1 = 1,
- DISK_BLOCK_FATBlock2 = 2,
- DISK_BLOCK_RootFilesBlock = 3,
- DISK_BLOCK_DataStartBlock = 4,
+ /** 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
{
*/
typedef union
{
- /** FAT Long File Name directory entry. */
+ /** VFAT Long File Name file entry. */
struct
{
uint8_t Ordinal;
uint16_t Unicode13;
} VFAT_LongFileName;
- /** FAT MSDOS 8.3 legacy file entry. */
+ /** Legacy FAT MSDOS 8.3 file entry. */
struct
{
uint8_t Filename[8];
uint32_t FileSizeBytes;
} MSDOS_File;
- /** FAT MSDOS (sub-)directory entry. */
+ /** Legacy FAT MSDOS (sub-)directory entry. */
struct
{
uint8_t Name[11];
/* 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 ReadWriteFirmwareFileBlock(const uint16_t BlockNumber,
- uint8_t* BlockBuffer,
- const bool Read) 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_WriteBlock(const uint16_t BlockNumber) AUX_BOOT_SECTION;
projects / pub / USBasp.git / blobdiff