complete msc device demo with 8KB ram disk
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hathach
parent
83d9ececfb
commit
024858a605
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@ -48,7 +48,7 @@
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//--------------------------------------------------------------------+
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enum
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{
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DISK_BLOCK_NUM = 16,
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DISK_BLOCK_NUM = 16, // 8KB is the smallest size that windows allow to mount
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DISK_BLOCK_SIZE = 512
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};
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@ -78,9 +78,35 @@ typedef ATTR_PACKED_STRUCT(struct) {
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uint8_t filesystem_type[8] ; ///< File system type label in ASCII, padded with blank (0x20). Standard values include "FAT," "FAT12," and "FAT16," but nothing is required.
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uint8_t reserved2[448] ;
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uint16_t fat_signature ; ///< Signature value (0xAA55).
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}fat16_boot_sector_t;
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}fat12_boot_sector_t;
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STATIC_ASSERT(sizeof(fat16_boot_sector_t) == 512, "size is not correct");
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STATIC_ASSERT(sizeof(fat12_boot_sector_t) == 512, "size is not correct");
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typedef ATTR_PACKED_STRUCT(struct) {
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uint8_t name[11];
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ATTR_PACKED_STRUCT(struct){
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uint8_t readonly : 1;
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uint8_t hidden : 1;
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uint8_t system : 1;
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uint8_t volume_label : 1;
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uint8_t directory : 1;
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uint8_t archive : 1;
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} attr; // Long File Name = 0x0f
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uint8_t reserved;
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uint8_t created_time_tenths_of_seconds;
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uint16_t created_time;
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uint16_t created_date;
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uint16_t accessed_date;
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uint16_t cluster_high;
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uint16_t written_time;
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uint16_t written_date;
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uint16_t cluster_low;
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uint32_t file_size;
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}fat_directory_t;
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STATIC_ASSERT(sizeof(fat_directory_t) == 32, "size is not correct");
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static scsi_inquiry_data_t mscd_inquiry_data TUSB_CFG_ATTR_USBRAM =
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{
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@ -133,7 +159,15 @@ static uint16_t read10(uint8_t coreid, uint8_t lun, scsi_read10_t* p_read10, voi
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{
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uint8_t block_count = __be2h_16(p_read10->block_count);
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(*pp_buffer) = &mscd_app_ramdisk[ __be2le(p_read10->lba)];
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(*pp_buffer) = mscd_app_ramdisk[ __be2le(p_read10->lba)];
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return block_count*DISK_BLOCK_SIZE;
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}
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static uint16_t write10(uint8_t coreid, uint8_t lun, scsi_read10_t* p_read10, void** pp_buffer)
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{
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uint8_t block_count = __be2h_16(p_read10->block_count);
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(*pp_buffer) = mscd_app_ramdisk[ __be2le(p_read10->lba)];
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return block_count*DISK_BLOCK_SIZE;
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}
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@ -182,6 +216,7 @@ msc_csw_status_t tusbd_msc_scsi_received_isr (uint8_t coreid, uint8_t lun, uint8
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break;
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case SCSI_CMD_WRITE_10:
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(*p_length) = write10(coreid, lun, (scsi_read10_t*) scsi_cmd, pp_buffer);
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break;
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default: return MSC_CSW_STATUS_FAILED;
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@ -193,10 +228,26 @@ msc_csw_status_t tusbd_msc_scsi_received_isr (uint8_t coreid, uint8_t lun, uint8
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//--------------------------------------------------------------------+
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// IMPLEMENTATION
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//--------------------------------------------------------------------+
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void fat12_fs_init(uint8_t mscd_app_ramdisk[DISK_BLOCK_NUM][DISK_BLOCK_SIZE]);
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void msc_dev_app_init (void)
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{
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fat16_boot_sector_t* p_boot_fat = (fat16_boot_sector_t* ) &mscd_app_ramdisk[0];
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memclr_(p_boot_fat, sizeof(fat16_boot_sector_t));
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fat12_fs_init(mscd_app_ramdisk);
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}
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//--------------------------------------------------------------------+
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// HELPER
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//--------------------------------------------------------------------+
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void fat12_fs_init(uint8_t mscd_app_ramdisk[DISK_BLOCK_NUM][DISK_BLOCK_SIZE])
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{
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uint8_t const readme_contents[] =
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"This is tinyusb's MassStorage Class demo.\r\n\r\n\
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If you find any bugs or get any questions, feel free to file an\r\n\
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issue at https://github.com/hathach/tinyusb";
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//------------- Boot Sector -------------//
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fat12_boot_sector_t* p_boot_fat = (fat12_boot_sector_t* ) mscd_app_ramdisk[0];
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memclr_(p_boot_fat, sizeof(fat12_boot_sector_t));
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memcpy(p_boot_fat->jump_code, "\xEB\x3C\x90", 3);
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memcpy(p_boot_fat->oem_name, "MSDOS5.0", 8);
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@ -218,5 +269,40 @@ void msc_dev_app_init (void)
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memcpy(p_boot_fat->volume_label , "tinyusb msc", 11);
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memcpy(p_boot_fat->filesystem_type, "FAT12 ", 8);
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p_boot_fat->fat_signature = 0xAA55;
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//------------- FAT12 Table (first 2 entries are F8FF, third entry is cluster end of readme file-------------//
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memcpy(mscd_app_ramdisk[1], "\xF8\xFF\xFF\xFF\x0F", 5);
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//------------- Root Directory -------------//
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fat_directory_t* p_entry = (fat_directory_t*) mscd_app_ramdisk[2];
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// first entry is volume label
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(*p_entry) = (fat_directory_t)
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{
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.name = "TINYUSB MSC",
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.attr.volume_label = 1,
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};
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p_entry += 1; // advance to second entry, second entry is readme file
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(*p_entry) = (fat_directory_t)
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{
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.name = "README TXT",
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.created_time = 0x6D52,
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.written_time = 0x6D52,
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.created_date = 0x4365,
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.accessed_date = 0x4365,
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.written_date = 0x4365,
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.cluster_high = 0,
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.cluster_low = 2,
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.file_size = sizeof(readme_contents)-1 // exculde NULL
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}; // first entry is volume label
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//------------- Readme Content -------------//
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memcpy(mscd_app_ramdisk[3], readme_contents, sizeof(readme_contents)-1);
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}
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#endif
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