原文地址http://qiita.com/mt08/items/fcc925fa47726bfc6c74
概要
- STM32CubeMXを使って、USB MassStorageを使ってみる。
- USBを使うときは、外付けのOscillator/Xtalが必要。(48MHzを作るのに、内部のやつは精度がでない？)
usbd_storage_if.cだけ変更. 今回は、ReadOnly.
環境
- STM32L1系
- ビルド環境
- Windows7 64bit
- MDK-ARM Lite v5.20
- STM32CubeMX v4.18.0
- ボードが動くくらいの設定(クロックとか、GPIOとか)
- FreeRTOS : [v] Enabled (Lチカにつかった程度)
- USB_DEVICE : Class for FS IP
Mass Storage Class - USB : [v] Device (FS)
=> コード生成
- Firmware Package for Family STM32L1 v1.6.0
大体の説明
-
コールバック
ホストに接続すると、コールバックが呼ばれるので、うまく応答すればよい。usbd_storage_if.c... USBD_StorageTypeDef USBD_Storage_Interface_fops_FS = { STORAGE_Init_FS, STORAGE_GetCapacity_FS, STORAGE_IsReady_FS, STORAGE_IsWriteProtected_FS, STORAGE_Read_FS, STORAGE_Write_FS, STORAGE_GetMaxLun_FS, (int8_t *)STORAGE_Inquirydata_FS, }; ... -
ディスクの容量は、
STORAGE_BLK_NBRにセクタ数定義する。
今回、#define STORAGE_BLK_NBR 0x81000としたので、
=> 0x81000 * 512bytes/sector = 258MBくらいのディスク -
コールバックは、だいたい、
STORAGE_Read_FSで、セクタのデータを要求してくるので、そいつをかえせばいい。- ↓の実装では、
_ReadSector()に飛ばしている。 -
_ReadSector()で、要求されたセクタ番号で、MBR, PBR, FAT, ROOT_DIR, DATAの領域で、処理を分けている。- MBR,PBRは、固定値を用意して、memcpy
- FAT, ROOTDIR, DATAは、Offsetを引いて、処理関数(
handleFatClusterChain,handleRoot,handleData)へ飛ばして、うまくデータを詰める
- ↓の実装では、
実際のコード
-
もともとのコードの変更箇所
usbd_storage_if.c... #define STORAGE_LUN_NBR 1 #define STORAGE_BLK_NBR 0x81000 //##mt08 #define STORAGE_BLK_SIZ ... int8_t STORAGE_IsWriteProtected_FS (uint8_t lun) { /* USER CODE BEGIN 5 */ return (USBD_FAIL); //##mt08: Read Only /* USER CODE END 5 */ } ... int8_t STORAGE_Read_FS (uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len) { /* USER CODE BEGIN 6 */ _ReadSector(buf, blk_addr, blk_len); //##mt08 return (USBD_OK); /* USER CODE END 6 */ }
追加コード
-
型宣言
#include <stdint.h> typedef uint8_t Byte; typedef struct MasterBootRecord { Byte checkRoutionOnx86[446]; struct { Byte bootDescriptor; /* 0x80: bootable device, 0x00: non-bootable */ Byte firstPartitionSector[3]; /* 1st sector number */ Byte fileSystemDescriptor; /* 1:FAT12, 4:FAT16(less than 32MB), 5:Extended-DOS Partition, 6:FAT16(more 32MB), 0xb:FAT32(more 2GB), 0xc:FAT32 Int32h, 0xe:FAT16 Int32h, 0xf:5:Extended-DOS Partition Int32h */ Byte lastPartitionSector[3]; Byte firstSectorNumbers[4]; /* first sector number (link to BPB sector) */ Byte numberOfSectors[4]; } partitionTable[4]; Byte sig[2]; /* 0x55, 0xaa */ } MBRecord; typedef struct FAT16BPB_t { /* FAT16 or FAT12 BPB */ Byte jmpOpeCode[3]; /* 0xeb ?? 0x90 */ Byte OEMName[8]; /* FAT16 */ Byte bytesPerSector[2]; /* bytes/sector */ Byte sectorsPerCluster; /* sectors/cluster */ Byte reservedSectors[2]; /* reserved sector, beginning with sector 0 */ Byte numberOfFATs; /* file allocation table */ Byte rootEntries[2]; /* root entry (512) */ Byte totalSectors[2]; /* partion total secter */ Byte mediaDescriptor; /* 0xf8: Hard Disk */ Byte sectorsPerFAT[2]; /* sector/FAT (FAT32 always zero: see bigSectorsPerFAT) */ Byte sectorsPerTrack[2]; /* sector/track (not use) */ Byte heads[2]; /* heads number (not use) */ Byte hiddenSectors[4]; /* hidden sector number */ Byte bigTotalSectors[4]; /* total sector number */ /* info */ Byte driveNumber; Byte unused; Byte extBootSignature; Byte serialNumber[4]; Byte volumeLabel[11]; Byte fileSystemType[8]; /* "FAT16 " */ Byte loadProgramCode[448]; Byte sig[2]; /* 0x55, 0xaa */ } BPBlock; // BIOS Parameter Block typedef struct DirEntry_t { Byte name[8]; /* file name */ Byte extension[3]; /* file name extension */ Byte attribute; /* file attribute bit 4 directory flag bit 3 volume flag bit 2 hidden flag bit 1 system flag bit 0 read only flag */ Byte reserved; /* use NT or same OS */ Byte createTimeMs; /* VFAT 10millsec (0 199) */ Byte createTime[2]; /* VFAT */ Byte createDate[2]; /* VFAT */ Byte accessDate[2]; /* VFAT */ Byte clusterHighWord[2]; /* FAT32 MSB 16 bits */ Byte updateTime[2]; Byte updateDate[2]; Byte cluster[2]; /* start cluster number */ Byte fileSize[4]; /* file size in bytes (directory is always zero) */ } DirEntry; #pragma anon_unions typedef struct _DirEntTime { union { uint16_t W; struct { uint16_t second : 5; uint16_t minutes : 6; uint16_t hour : 5; } B; }; } DirEntTime; typedef struct _DirEntDate { union { uint16_t W; struct { uint16_t day : 5; uint16_t month : 4; uint16_t year : 7; } B; }; } DirEntDate; #pragma no_anon_unions -
固定値: MBRとか、PBSとか。
(てきとうなUSBフラッシュメモリで、パーティション切って、フォーマットして、ダンプして、必要なとこを入力)const MBRecord sectMBR = { .checkRoutionOnx86 = { 0x00 }, .partitionTable = { { .bootDescriptor = 0x00, .firstPartitionSector = { 0x02, 0x21, 0x00 }, .fileSystemDescriptor = 0x06, //FAT16 .lastPartitionSector = { 0xC2, 0x22, 0x20 }, .firstSectorNumbers = { 0x00, 0x08, 0x00, 0x00 }, .numberOfSectors = { 0x00, 0x00, 0x08, 0x00 }, },//[0] { 0 },//[1] { 0 },//[2] { 0 },//[3] }, .sig = { 0x55, 0xAA }, }; const BPBlock sectBPB = { .jmpOpeCode = { 0xEB, 0x00, 0x90 }, .OEMName = { ' ',' ',' ',' ',' ',' ',' ',' ' }, .bytesPerSector = { 0x00, 0x02 }, .sectorsPerCluster = 0x08, // 4KB/sectors .reservedSectors = { 0x08, 0x00 }, .numberOfFATs = 0x02, .rootEntries = { 0x00, 0x02 }, .totalSectors = { 0x00, 0x00 }, .mediaDescriptor = 0xF8, // HDD .sectorsPerFAT = { 0x00, 0x01 }, .sectorsPerTrack = { 0x3F,0x00 }, .heads = { 0xFF,0x00 }, .hiddenSectors = { 0x00, 0x08, 0x00, 0x00 }, .bigTotalSectors = { 0x00,0x00,0x08, 0x00 }, .driveNumber = 0x80, .unused = 0, .extBootSignature = 0x29, .serialNumber = { 0x78,0x56,0x34,0x12 }, .volumeLabel = { 'N','O',' ','N','A','M','E',' ',' ',' ',' ' }, .fileSystemType = { 'F','A','T','1','6',' ',' ',' ' }, .loadProgramCode = { 0 }, .sig = { 0x55, 0xAA }, }; #define SECTOR_MBR (0x0000) #define SECTOR_PBR (0x0800) #define SECTOR_FAT1 (0x0808) #define SECTOR_FAT2 (0x0908) #define SECTOR_ROOT (0x0A08) #define SECTOR_DATA (0x0A28) -
セクタ読み出しで、それっぽいデータをわたすとこ。
void _handleFatClusterChain(uint32_t sect_offset, uint8_t *buf)
{
uint16_t *bufW = (uint16_t *)&buf[0];
if (sect_offset == 0)
{
bufW[0] = 0xfff8;
bufW[1] = 0xffff;
bufW[2] = 0xffff; //最初のファイル. 1クラスタでおわり.
}
}
void _handleRoot(uint32_t sect_offset, uint8_t *buf)
{
// 1 sector(512bytes) has 16 entries
DirEntry *pDir = (DirEntry *)buf;
if (sect_offset == 0)
{
memset(pDir, 0x00, sizeof(DirEntry));
sprintf((char *)pDir->name, "TEXT_123");
pDir->extension[0] = 'T';
pDir->extension[1] = 'X';
pDir->extension[2] = 'T';
pDir->attribute = 0x00;
{
DirEntTime *pT = (DirEntTime *)&pDir->updateTime[0];
DirEntDate *pD = (DirEntDate *)&pDir->updateDate[0];
pT->B.hour = 12;
pT->B.minutes = 34;
pT->B.second = 56 / 2;
pD->B.year = 2017 - 1980;
pD->B.month = 1;
pD->B.day = 12;
}
*(uint16_t*)&pDir->cluster = 0x0002;
*(uint32_t*)&pDir->fileSize = 123;
}
}
void _handleData(uint32_t sect_offset, uint8_t *buf)
{
memset(buf, 'A', 512);
sprintf((char *)buf, "Hello World!\r\n");
buf[14]='>';
}
uint32_t _ReadSector(uint8_t *buf, uint32_t blk_addr, uint16_t blk_len)
{
switch (blk_addr)
{
case SECTOR_MBR:
memcpy(buf, (const void *)§MBR, 512);
break;
case SECTOR_PBR:
memcpy(buf, (const void *)§BPB, 512);
break;
default:
memset(buf, 0x00, 512);
//FAT cluster chain
if ((SECTOR_FAT1 <= blk_addr) && (blk_addr < SECTOR_ROOT))
{
if (blk_addr >= SECTOR_FAT2) { blk_addr -= (SECTOR_FAT2 - SECTOR_FAT1); }
_handleFatClusterChain(blk_addr - SECTOR_FAT1, buf);
}
else if ((SECTOR_ROOT <= blk_addr) && (blk_addr < SECTOR_DATA))
{
_handleRoot(blk_addr - SECTOR_ROOT, buf);
}
else if (SECTOR_DATA <= blk_addr)
{
_handleData(blk_addr - SECTOR_DATA, buf);
}
break;
}
return 0;
}
その他
- 4KB/clusterにしてるのは、STM32の内蔵FLASHが4KB/sectorなので。
で、256MBくらいのパーティションで、FAT16フォーマットすると、4KB/clusterになる。
(ファイルシステムのクラスタサイズと、フラッシュメモリの物理セクタサイズがちがうと、管理が大変だよね...;_;) - EEPROMにファイル情報(ROOTDIRに入るような情報=>FATチェーン生成)、FLASHにデータのみ、という感じで使用しようかと。
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
好了现在我们动手吧。现在只要修改usbd_storage_if.C文件
/** ****************************************************************************** * @file : usbd_storage_if.c * @brief : Memory management layer ****************************************************************************** * This notice applies to any and all portions of this file * that are not between comment pairs USER CODE BEGIN and * USER CODE END. Other portions of this file, whether * inserted by the user or by software development tools * are owned by their respective copyright owners. * * Copyright (c) 2017 STMicroelectronics International N.V. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted, provided that the following conditions are met: * * 1. Redistribution of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of STMicroelectronics nor the names of other * contributors to this software may be used to endorse or promote products * derived from this software without specific written permission. * 4. This software, including modifications and/or derivative works of this * software, must execute solely and exclusively on microcontroller or * microprocessor devices manufactured by or for STMicroelectronics. * 5. Redistribution and use of this software other than as permitted under * this license is void and will automatically terminate your rights under * this license. * * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT * SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "usbd_storage_if.h" /* USER CODE BEGIN INCLUDE */ /* USER CODE END INCLUDE */ /** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY * @{ */ /** @defgroup USBD_STORAGE * @brief usbd core module * @{ */ /** @defgroup USBD_STORAGE_Private_TypesDefinitions * @{ */ /* USER CODE BEGIN PRIVATE_TYPES */ /* USER CODE END PRIVATE_TYPES */ /** * @} */ /** @defgroup USBD_STORAGE_Private_Defines * @{ */ #define STORAGE_LUN_NBR 1 #define STORAGE_BLK_NBR 0x81000 #define STORAGE_BLK_SIZ 0x200 /* USER CODE BEGIN PRIVATE_DEFINES */ /* USER CODE END PRIVATE_DEFINES */ /** * @} */ /** @defgroup USBD_STORAGE_Private_Macros * @{ */ /* USER CODE BEGIN PRIVATE_MACRO */ /* USER CODE END PRIVATE_MACRO */ /** * @} */ /** @defgroup USBD_STORAGE_IF_Private_Variables * @{ */ /* USER CODE BEGIN INQUIRY_DATA_FS */ /* USB Mass storage Standard Inquiry Data */ const int8_t STORAGE_Inquirydata_FS[] = /* 36 */ { /* LUN 0 */ 0x00, 0x80, 0x02, 0x02, (STANDARD_INQUIRY_DATA_LEN - 5), 0x00, 0x00, 0x00, 'S', 'T', 'M', ' ', ' ', ' ', ' ', ' ', /* Manufacturer : 8 bytes */ 'P', 'r', 'o', 'd', 'u', 'c', 't', ' ', /* Product : 16 Bytes */ ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '0', '.', '0' ,'1', /* Version : 4 Bytes */ }; /* USER CODE END INQUIRY_DATA_FS */ /* USER CODE BEGIN PRIVATE_VARIABLES */ /* USER CODE END PRIVATE_VARIABLES */ /** * @} */ /** @defgroup USBD_STORAGE_IF_Exported_Variables * @{ */ extern USBD_HandleTypeDef hUsbDeviceFS; /* USER CODE BEGIN EXPORTED_VARIABLES */ /* USER CODE END EXPORTED_VARIABLES */ /** * @} */ /** @defgroup USBD_STORAGE_Private_FunctionPrototypes * @{ */ static int8_t STORAGE_Init_FS (uint8_t lun); static int8_t STORAGE_GetCapacity_FS (uint8_t lun, uint32_t *block_num, uint16_t *block_size); static int8_t STORAGE_IsReady_FS (uint8_t lun); static int8_t STORAGE_IsWriteProtected_FS (uint8_t lun); static int8_t STORAGE_Read_FS (uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len); static int8_t STORAGE_Write_FS (uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len); static int8_t STORAGE_GetMaxLun_FS (void); /* USER CODE BEGIN PRIVATE_FUNCTIONS_DECLARATION */ #include <stdint.h> typedef uint8_t Byte; typedef struct MasterBootRecord { Byte checkRoutionOnx86[446]; struct { Byte bootDescriptor; /* 0x80: bootable device, 0x00: non-bootable */ Byte firstPartitionSector[3]; /* 1st sector number */ Byte fileSystemDescriptor; /* 1:FAT12, 4:FAT16(less than 32MB), 5:Extended-DOS Partition, 6:FAT16(more 32MB), 0xb:FAT32(more 2GB), 0xc:FAT32 Int32h, 0xe:FAT16 Int32h, 0xf:5:Extended-DOS Partition Int32h */ Byte lastPartitionSector[3]; Byte firstSectorNumbers[4]; /* first sector number (link to BPB sector) */ Byte numberOfSectors[4]; } partitionTable[4]; Byte sig[2]; /* 0x55, 0xaa */ } MBRecord; typedef struct FAT16BPB_t { /* FAT16 or FAT12 BPB */ Byte jmpOpeCode[3]; /* 0xeb ?? 0x90 */ Byte OEMName[8]; /* FAT16 */ Byte bytesPerSector[2]; /* bytes/sector */ Byte sectorsPerCluster; /* sectors/cluster */ Byte reservedSectors[2]; /* reserved sector, beginning with sector 0 */ Byte numberOfFATs; /* file allocation table */ Byte rootEntries[2]; /* root entry (512) */ Byte totalSectors[2]; /* partion total secter */ Byte mediaDescriptor; /* 0xf8: Hard Disk */ Byte sectorsPerFAT[2]; /* sector/FAT (FAT32 always zero: see bigSectorsPerFAT) */ Byte sectorsPerTrack[2]; /* sector/track (not use) */ Byte heads[2]; /* heads number (not use) */ Byte hiddenSectors[4]; /* hidden sector number */ Byte bigTotalSectors[4]; /* total sector number */ /* info */ Byte driveNumber; Byte unused; Byte extBootSignature; Byte serialNumber[4]; Byte volumeLabel[11]; Byte fileSystemType[8]; /* "FAT16 " */ Byte loadProgramCode[448]; Byte sig[2]; /* 0x55, 0xaa */ } BPBlock; // BIOS Parameter Block typedef struct DirEntry_t { Byte name[8]; /* file name */ Byte extension[3]; /* file name extension */ Byte attribute; /* file attribute bit 4 directory flag bit 3 volume flag bit 2 hidden flag bit 1 system flag bit 0 read only flag */ Byte reserved; /* use NT or same OS */ Byte createTimeMs; /* VFAT 10millsec (0 199) */ Byte createTime[2]; /* VFAT */ Byte createDate[2]; /* VFAT */ Byte accessDate[2]; /* VFAT */ Byte clusterHighWord[2]; /* FAT32 MSB 16 bits */ Byte updateTime[2]; Byte updateDate[2]; Byte cluster[2]; /* start cluster number */ Byte fileSize[4]; /* file size in bytes (directory is always zero) */ } DirEntry; #pragma anon_unions typedef struct _DirEntTime { union { uint16_t W; struct { uint16_t second : 5; uint16_t minutes : 6; uint16_t hour : 5; } B; }; } DirEntTime; typedef struct _DirEntDate { union { uint16_t W; struct { uint16_t day : 5; uint16_t month : 4; uint16_t year : 7; } B; }; } DirEntDate; #pragma no_anon_unions const MBRecord sectMBR = { .checkRoutionOnx86 = { 0x00 }, .partitionTable = { { .bootDescriptor = 0x00, .firstPartitionSector = { 0x02, 0x21, 0x00 }, .fileSystemDescriptor = 0x06, //FAT16 .lastPartitionSector = { 0xC2, 0x22, 0x20 }, .firstSectorNumbers = { 0x00, 0x08, 0x00, 0x00 }, .numberOfSectors = { 0x00, 0x00, 0x08, 0x00 }, },//[0] { 0 },//[1] { 0 },//[2] { 0 },//[3] }, .sig = { 0x55, 0xAA }, }; const BPBlock sectBPB = { .jmpOpeCode = { 0xEB, 0x00, 0x90 }, .OEMName = { ' ',' ',' ',' ',' ',' ',' ',' ' }, .bytesPerSector = { 0x00, 0x02 }, .sectorsPerCluster = 0x08, // 4KB/sectors .reservedSectors = { 0x08, 0x00 }, .numberOfFATs = 0x02, .rootEntries = { 0x00, 0x02 }, .totalSectors = { 0x00, 0x00 }, .mediaDescriptor = 0xF8, // HDD .sectorsPerFAT = { 0x00, 0x01 }, .sectorsPerTrack = { 0x3F,0x00 }, .heads = { 0xFF,0x00 }, .hiddenSectors = { 0x00, 0x08, 0x00, 0x00 }, .bigTotalSectors = { 0x00,0x00,0x08, 0x00 }, .driveNumber = 0x80, .unused = 0, .extBootSignature = 0x29, .serialNumber = { 0x78,0x56,0x34,0x12 }, .volumeLabel = { 'N','O',' ','N','A','M','E',' ',' ',' ',' ' }, .fileSystemType = { 'F','A','T','1','6',' ',' ',' ' }, .loadProgramCode = { 0 }, .sig = { 0x55, 0xAA }, }; #define SECTOR_MBR (0x0000) #define SECTOR_PBR (0x0800) #define SECTOR_FAT1 (0x0808) #define SECTOR_FAT2 (0x0908) #define SECTOR_ROOT (0x0A08) #define SECTOR_DATA (0x0A28) void _handleFatClusterChain(uint32_t sect_offset, uint8_t *buf) { uint16_t *bufW = (uint16_t *)&buf[0]; if (sect_offset == 0) { bufW[0] = 0xfff8; bufW[1] = 0xffff; bufW[2] = 0xffff; //结束第一个文件。1簇。 } } void _handleRoot(uint32_t sect_offset, uint8_t *buf) { // 1 sector(512bytes) has 16 entries DirEntry *pDir = (DirEntry *)buf; if (sect_offset == 0) { memset(pDir, 0x00, sizeof(DirEntry)); sprintf((char *)pDir->name, "TEXT_123"); pDir->extension[0] = 'T'; pDir->extension[1] = 'X'; pDir->extension[2] = 'T'; pDir->attribute = 0x00; { DirEntTime *pT = (DirEntTime *)&pDir->updateTime[0]; DirEntDate *pD = (DirEntDate *)&pDir->updateDate[0]; pT->B.hour = 12; pT->B.minutes = 34; pT->B.second = 56 / 2; pD->B.year = 2017 - 1980; pD->B.month = 1; pD->B.day = 12; } *(uint16_t*)&pDir->cluster = 0x0002; *(uint32_t*)&pDir->fileSize = 123; } } void _handleData(uint32_t sect_offset, uint8_t *buf) { memset(buf, 'A', 512); sprintf((char *)buf, "Hello World!\r\n"); buf[14]='>'; } uint32_t _ReadSector(uint8_t *buf, uint32_t blk_addr, uint16_t blk_len) { switch (blk_addr) { case SECTOR_MBR: memcpy(buf, (const void *)§MBR, 512); break; case SECTOR_PBR: memcpy(buf, (const void *)§BPB, 512); break; default: memset(buf, 0x00, 512); //FAT cluster chain if ((SECTOR_FAT1 <= blk_addr) && (blk_addr < SECTOR_ROOT)) { if (blk_addr >= SECTOR_FAT2) { blk_addr -= (SECTOR_FAT2 - SECTOR_FAT1); } _handleFatClusterChain(blk_addr - SECTOR_FAT1, buf); } else if ((SECTOR_ROOT <= blk_addr) && (blk_addr < SECTOR_DATA)) { _handleRoot(blk_addr - SECTOR_ROOT, buf); } else if (SECTOR_DATA <= blk_addr) { _handleData(blk_addr - SECTOR_DATA, buf); } break; } return 0; } /* USER CODE END PRIVATE_FUNCTIONS_DECLARATION */ /** * @} */ USBD_StorageTypeDef USBD_Storage_Interface_fops_FS = { STORAGE_Init_FS, STORAGE_GetCapacity_FS, STORAGE_IsReady_FS, STORAGE_IsWriteProtected_FS, STORAGE_Read_FS, STORAGE_Write_FS, STORAGE_GetMaxLun_FS, (int8_t *)STORAGE_Inquirydata_FS, }; /* Private functions ---------------------------------------------------------*/ /******************************************************************************* * Function Name : STORAGE_Init_FS * Description : * Input : None. * Output : None. * Return : None. *******************************************************************************/ int8_t STORAGE_Init_FS (uint8_t lun) { /* USER CODE BEGIN 2 */ return (USBD_OK); /* USER CODE END 2 */ } /******************************************************************************* * Function Name : STORAGE_GetCapacity_FS * Description : * Input : None. * Output : None. * Return : None. *******************************************************************************/ int8_t STORAGE_GetCapacity_FS (uint8_t lun, uint32_t *block_num, uint16_t *block_size) { /* USER CODE BEGIN 3 */ *block_num = STORAGE_BLK_NBR; *block_size = STORAGE_BLK_SIZ; return (USBD_OK); /* USER CODE END 3 */ } /******************************************************************************* * Function Name : STORAGE_IsReady_FS * Description : * Input : None. * Output : None. * Return : None. *******************************************************************************/ int8_t STORAGE_IsReady_FS (uint8_t lun) { /* USER CODE BEGIN 4 */ return (USBD_OK); /* USER CODE END 4 */ } /******************************************************************************* * Function Name : STORAGE_IsWriteProtected_FS * Description : * Input : None. * Output : None. * Return : None. *******************************************************************************/ int8_t STORAGE_IsWriteProtected_FS (uint8_t lun) { /* USER CODE BEGIN 5 */ return (USBD_OK); /* USER CODE END 5 */ } /******************************************************************************* * Function Name : STORAGE_Read_FS * Description : * Input : None. * Output : None. * Return : None. *******************************************************************************/ int8_t STORAGE_Read_FS (uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len) { /* USER CODE BEGIN 6 */ _ReadSector(buf, blk_addr, blk_len); return (USBD_OK); /* USER CODE END 6 */ } /******************************************************************************* * Function Name : STORAGE_Write_FS * Description : * Input : None. * Output : None. * Return : None. *******************************************************************************/ int8_t STORAGE_Write_FS (uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len) { /* USER CODE BEGIN 7 */ return (USBD_OK); /* USER CODE END 7 */ } /******************************************************************************* * Function Name : STORAGE_GetMaxLun_FS * Description : * Input : None. * Output : None. * Return : None. *******************************************************************************/ int8_t STORAGE_GetMaxLun_FS (void) { /* USER CODE BEGIN 8 */ return (STORAGE_LUN_NBR - 1); /* USER CODE END 8 */ } /* USER CODE BEGIN PRIVATE_FUNCTIONS_IMPLEMENTATION */ /* USER CODE END PRIVATE_FUNCTIONS_IMPLEMENTATION */ /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
