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fix fat table location 

still has issue with root directory
This commit is contained in:
hathach 2018-05-11 22:21:55 +07:00
parent 98f5a624e2
commit 7beaca1325
1 changed files with 10 additions and 13 deletions
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23
src/msc/msc_flash.c
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@ -327,7 +327,7 @@ int32_t tud_msc_write10_cb (uint8_t rhport, uint8_t lun, uint32_t lba, uint32_t
_wr10_state = WRITE10_WRITING;
return 0;
break;
case WRITE10_WRITING:
return 0;
break;
@ -358,6 +358,7 @@ typedef struct ATTR_PACKED {
uint16_t byte_per_sector ; ///< Bytes per sector. Allowed values include 512, 1024, 2048, and 4096.
uint8_t sector_per_cluster ; ///< Sectors per cluster (data unit). Allowed values are powers of 2, but the cluster size must be 32KB or smaller.
uint16_t reserved_sectors ; ///< Size in sectors of the reserved area.
uint8_t fat_num ; ///< Number of FATs. Typically two for redundancy, but according to Microsoft it can be one for some small storage devices.
uint16_t root_entry_count ; ///< Maximum number of files in the root directory for FAT12 and FAT16. This is 0 for FAT32 and typically 512 for FAT16.
uint16_t sector_count ; ///< 16-bit number of sectors in file system. If the number of sectors is larger than can be represented in this 2-byte value, a 4-byte value exists later in the data structure and this should be 0.
@ -435,7 +436,7 @@ static void fat12_mkfs(void)
{
memclr_(_page_cached, sizeof(_page_cached));
/*------------- Boot Sector cluster -------------*/
/*------------- Sector 0: Boot Sector -------------*/
fat12_boot_sector_t* boot_sect = (fat12_boot_sector_t*) _page_cached;
memcpy(boot_sect->jump_code, "\xEB\xFE\x90", 3);
@ -450,7 +451,7 @@ static void fat12_mkfs(void)
set16(&boot_sect->sector_count, MSC_FLASH_BLOCK_NUM);
boot_sect->media_type = 0xf8; // fixed disk
set16(&boot_sect->sector_per_fat, 1);
set16(&boot_sect->sector_per_fat, 7); // 8 minus boot sector
set16(&boot_sect->sector_per_track, 63);
set16(&boot_sect->head_num, 255);
@ -461,16 +462,12 @@ static void fat12_mkfs(void)
memcpy(boot_sect->fs_type, "FAT12 ", 8);
set16(&boot_sect->signature, BOOTSECT_SIGNATURE);
// Erase and Write cluster.
fat12_write_cluster(0, _page_cached, FL_PAGE_SIZE);
//------------- FAT12 Table cluster -------------//
//------------- Sector 1: FAT12 Table -------------//
// first 2 entries are F8FF, third entry is cluster end of readme file
memclr_(_page_cached, sizeof(_page_cached));
memcpy(_page_cached, "\xF8\xFF\xFF\xFF\x0F", 5);
memcpy(_page_cached+MSC_FLASH_BLOCK_SIZE, "\xF8\xFF\xFF\xFF\x0F", 5);
// Erase and Write cluster.
fat12_write_cluster(1, _page_cached, FL_PAGE_SIZE);
// Erase and Write first cluster.
fat12_write_cluster(0, _page_cached, FL_PAGE_SIZE);
//------------- Root Directory cluster -------------//
uint8_t const readme_contents[] = "Adafruit Feather nRF52840";
@ -508,14 +505,14 @@ static void fat12_mkfs(void)
};
// Erase and Write cluster.
fat12_write_cluster(2, _page_cached, FL_PAGE_SIZE);
fat12_write_cluster(1, _page_cached, FL_PAGE_SIZE);
//------------- Readme Content cluster -------------//
memclr_(_page_cached, sizeof(_page_cached));
memcpy(_page_cached, readme_contents, sizeof(readme_contents)-1);
// Erase and Write cluster.
fat12_write_cluster(3, _page_cached, FL_PAGE_SIZE);
fat12_write_cluster(2, _page_cached, FL_PAGE_SIZE);
}
#if 0