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Refactor macros in the VirtualFAT implementation of the incomplete Mass Storage bootloader.

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This commit is contained in:
Dean Camera 2013-03-09 08:00:22 +00:00
parent f0c7a11670
commit 7f5dab4f26
3 changed files with 17 additions and 15 deletions
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4
Bootloaders/Incomplete/MassStorage/Lib/SCSI.c
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@ -214,7 +214,7 @@ static bool SCSI_Command_Request_Sense(USB_ClassInfo_MS_Device_t* const MSInterf
static bool SCSI_Command_Read_Capacity_10(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo) static bool SCSI_Command_Read_Capacity_10(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
{ {
uint32_t LastBlockAddressInLUN = (LUN_MEDIA_BLOCKS - 1); uint32_t LastBlockAddressInLUN = (LUN_MEDIA_BLOCKS - 1);
uint32_t MediaBlockSize = VIRTUAL_MEMORY_BLOCK_SIZE; uint32_t MediaBlockSize = SECTOR_SIZE_BYTES;
Endpoint_Write_Stream_BE(&LastBlockAddressInLUN, sizeof(LastBlockAddressInLUN), NULL); Endpoint_Write_Stream_BE(&LastBlockAddressInLUN, sizeof(LastBlockAddressInLUN), NULL);
Endpoint_Write_Stream_BE(&MediaBlockSize, sizeof(MediaBlockSize), NULL); Endpoint_Write_Stream_BE(&MediaBlockSize, sizeof(MediaBlockSize), NULL);
@ -292,7 +292,7 @@ static bool SCSI_Command_ReadWrite_10(USB_ClassInfo_MS_Device_t* const MSInterfa
VirtualFAT_WriteBlocks(MSInterfaceInfo, BlockAddress, TotalBlocks); VirtualFAT_WriteBlocks(MSInterfaceInfo, BlockAddress, TotalBlocks);
/* Update the bytes transferred counter and succeed the command */ /* Update the bytes transferred counter and succeed the command */
MSInterfaceInfo->State.CommandBlock.DataTransferLength -= ((uint32_t)TotalBlocks * VIRTUAL_MEMORY_BLOCK_SIZE); MSInterfaceInfo->State.CommandBlock.DataTransferLength -= ((uint32_t)TotalBlocks * SECTOR_SIZE_BYTES);
return true; return true;
} }

16
Bootloaders/Incomplete/MassStorage/Lib/VirtualFAT.c
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@ -30,15 +30,6 @@
#include "VirtualFAT.h" #include "VirtualFAT.h"
#define FAT_TIME(h, m, s) ((h << 11) | (m << 5) | (s >> 1))
#define FAT_DATE(d, m, y) (((y - 1980) << 9) | (m << 5) | (d << 0))
#define SECTOR_SIZE_BYTES VIRTUAL_MEMORY_BLOCK_SIZE
#define SECTOR_PER_CLUSTER 4
#define CLUSTER_SIZE_BYTES (SECTOR_PER_CLUSTER * SECTOR_SIZE_BYTES)
#define FILE_CLUSTERS(size) (size / CLUSTER_SIZE_BYTES)
static const FATBootBlock_t BootBlock = static const FATBootBlock_t BootBlock =
{ {
.Bootstrap = {0xEB, 0x3C, 0x90}, .Bootstrap = {0xEB, 0x3C, 0x90},
@ -47,7 +38,7 @@ static const FATBootBlock_t BootBlock =
.SectorsPerCluster = SECTOR_PER_CLUSTER, .SectorsPerCluster = SECTOR_PER_CLUSTER,
.ReservedSectors = 1, .ReservedSectors = 1,
.FATCopies = 2, .FATCopies = 2,
.RootDirectoryEntries = SECTOR_SIZE_BYTES / sizeof(FATDirectoryEntry_t), .RootDirectoryEntries = (SECTOR_SIZE_BYTES / sizeof(FATDirectoryEntry_t)),
.TotalSectors16 = LUN_MEDIA_BLOCKS, .TotalSectors16 = LUN_MEDIA_BLOCKS,
.MediaDescriptor = 0xF8, .MediaDescriptor = 0xF8,
.SectorsPerFAT = 1, .SectorsPerFAT = 1,
@ -76,6 +67,7 @@ static FATDirectoryEntry_t FirmwareFileEntry =
.FileSizeBytes = 2049, .FileSizeBytes = 2049,
}; };
static void WriteBlock(uint16_t BlockNumber) static void WriteBlock(uint16_t BlockNumber)
{ {
uint8_t BlockBuffer[512]; uint8_t BlockBuffer[512];
@ -156,6 +148,8 @@ void VirtualFAT_WriteBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,
{ {
uint16_t CurrentBlock = (uint16_t)BlockAddress; uint16_t CurrentBlock = (uint16_t)BlockAddress;
/* Emulated FAT is performed per-block, pass each requested block index
* to the emulation function */
while (TotalBlocks--) while (TotalBlocks--)
WriteBlock(CurrentBlock++); WriteBlock(CurrentBlock++);
} }
@ -166,6 +160,8 @@ void VirtualFAT_ReadBlocks(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,
{ {
uint16_t CurrentBlock = (uint16_t)BlockAddress; uint16_t CurrentBlock = (uint16_t)BlockAddress;
/* Emulated FAT is performed per-block, pass each requested block index
* to the emulation function */
while (TotalBlocks--) while (TotalBlocks--)
ReadBlock(CurrentBlock++); ReadBlock(CurrentBlock++);
} }

12
Bootloaders/Incomplete/MassStorage/Lib/VirtualFAT.h
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@ -38,11 +38,17 @@
#include <LUFA/Drivers/USB/USB.h> #include <LUFA/Drivers/USB/USB.h>
/* Macros: */ /* Macros: */
#define VIRTUAL_MEMORY_BLOCK_SIZE 512
#define FIRMWARE_FILE_SIZE (FLASHEND + 1UL) #define FIRMWARE_FILE_SIZE (FLASHEND + 1UL)
#define FILE_CLUSTERS(size) ((size / CLUSTER_SIZE_BYTES) + ((size % CLUSTER_SIZE_BYTES) ? 1 : 0))
#define LUN_MEDIA_BLOCKS ((FIRMWARE_FILE_SIZE / VIRTUAL_MEMORY_BLOCK_SIZE) + 32) #define SECTOR_SIZE_BYTES 512
#define SECTOR_PER_CLUSTER 4
#define CLUSTER_SIZE_BYTES (SECTOR_PER_CLUSTER * SECTOR_SIZE_BYTES)
#define LUN_MEDIA_BLOCKS ((FIRMWARE_FILE_SIZE / SECTOR_SIZE_BYTES) + 32)
#define FAT_TIME(h, m, s) ((h << 11) | (m << 5) | (s >> 1))
#define FAT_DATE(d, m, y) (((y - 1980) << 9) | (m << 5) | (d << 0))
/* Type Definitions: */ /* Type Definitions: */
typedef struct typedef struct