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Minor cleanup of the Mass Storage bootloader VirtualFAT code.

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This commit is contained in:
Dean Camera 2013-03-29 13:14:07 +00:00
parent ddd6632295
commit b956fedeeb
1 changed files with 25 additions and 14 deletions
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39
Bootloaders/MassStorage/Lib/VirtualFAT.c
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@ -72,7 +72,7 @@ static const FATBootBlock_t BootBlock =
}; };
/** FAT 8.3 style directory entry, for the virtual FLASH contents file. */ /** FAT 8.3 style directory entry, for the virtual FLASH contents file. */
FATDirectoryEntry_t FirmwareFileEntries[] = static FATDirectoryEntry_t FirmwareFileEntries[] =
{ {
/* Root volume label entry; disk label is contained in the Filename and /* Root volume label entry; disk label is contained in the Filename and
* Extension fields (concatenated) with a special attribute flag - other * Extension fields (concatenated) with a special attribute flag - other
@ -143,7 +143,7 @@ FATDirectoryEntry_t FirmwareFileEntries[] =
* are (usually?) replaced using the original file's physical sectors. On Linux * are (usually?) replaced using the original file's physical sectors. On Linux
* file replacements are performed with an offset. * file replacements are performed with an offset.
*/ */
uint16_t FileStartBlock = DISK_BLOCK_DataStartBlock; static uint16_t FileStartBlock = DISK_BLOCK_DataStartBlock;
/** Updates a FAT12 cluster entry in the FAT file table with the specified next /** Updates a FAT12 cluster entry in the FAT file table with the specified next
@ -252,19 +252,30 @@ void VirtualFAT_WriteBlock(const uint16_t BlockNumber)
Endpoint_Read_Stream_LE(BlockBuffer, sizeof(BlockBuffer), NULL); Endpoint_Read_Stream_LE(BlockBuffer, sizeof(BlockBuffer), NULL);
Endpoint_ClearOUT(); Endpoint_ClearOUT();
if (BlockNumber == DISK_BLOCK_RootFilesBlock) switch (BlockNumber)
{ {
/* Copy over the updated directory entries */ case DISK_BLOCK_BootBlock:
memcpy(FirmwareFileEntries, BlockBuffer, sizeof(FirmwareFileEntries)); case DISK_BLOCK_FATBlock1:
case DISK_BLOCK_FATBlock2:
/* Ignore writes to the boot and FAT blocks */
/* Save the new firmware file block offset so the written and read file break;
* contents can be correctly mapped to the device's FLASH pages */
FileStartBlock = DISK_BLOCK_DataStartBlock + case DISK_BLOCK_RootFilesBlock:
(FirmwareFileEntries[DISK_FILE_ENTRY_FirmwareMSDOS].MSDOS_File.StartingCluster - 2) * SECTOR_PER_CLUSTER; /* Copy over the updated directory entries */
} memcpy(FirmwareFileEntries, BlockBuffer, sizeof(FirmwareFileEntries));
else
{ /* Save the new firmware file block offset so the written and read file
ReadWriteFirmwareFileBlock(BlockNumber, BlockBuffer, false); * contents can be correctly mapped to the device's FLASH pages */
FileStartBlock = DISK_BLOCK_DataStartBlock +
(FirmwareFileEntries[DISK_FILE_ENTRY_FirmwareMSDOS].MSDOS_File.StartingCluster - 2) * SECTOR_PER_CLUSTER;
break;
default:
ReadWriteFirmwareFileBlock(BlockNumber, BlockBuffer, false);
break;
} }
} }
@ -317,7 +328,7 @@ void VirtualFAT_ReadBlock(const uint16_t BlockNumber)
break; break;
default: /* Blocks 4 onwards: Data allocation section */ default:
ReadWriteFirmwareFileBlock(BlockNumber, BlockBuffer, true); ReadWriteFirmwareFileBlock(BlockNumber, BlockBuffer, true);
break; break;