FatFs_USBDisk
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Outline
Includes
#include "ff_gen_drv.h"
#include "usbh_diskio_dma.h"
Private define
#define USB_DEFAULT_BLOCK_SIZE
Private variables
scratch
Private function prototypes
USBH_Driver
Private functions
USBH_initialize(BYTE)
USBH_status(BYTE)
USBH_read(BYTE, BYTE *, DWORD, UINT)
USBH_write(BYTE, const BYTE *, DWORD, UINT)
USBH_ioctl(BYTE, BYTE, void *)
Files
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SourceVuSTM32 Libraries and SamplesFatFs_USBDiskSrc/usbh_diskio_dma.c
 
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/** ****************************************************************************** * @file usbh_diskio_dma.c * @author MCD Application Team * @brief USB Host Disk I/O driver (with internal DMA). ****************************************************************************** * @attention * * Copyright (c) 2017 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** *//* ... */ /* Includes ------------------------------------------------------------------*/ #include "ff_gen_drv.h" #include "usbh_diskio_dma.h" Includes /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ #define USB_DEFAULT_BLOCK_SIZE 512 Private define /* Private variables ---------------------------------------------------------*/ static DWORD scratch[_MAX_SS / 4]; extern USBH_HandleTypeDef hUSB_Host; Private variables /* Private function prototypes -----------------------------------------------*/ DSTATUS USBH_initialize (BYTE); DSTATUS USBH_status (BYTE); DRESULT USBH_read (BYTE, BYTE*, DWORD, UINT); #if _USE_WRITE == 1 DRESULT USBH_write (BYTE, const BYTE*, DWORD, UINT); #endif /* _USE_WRITE == 1 */ #if _USE_IOCTL == 1 DRESULT USBH_ioctl (BYTE, BYTE, void*); #endif /* _USE_IOCTL == 1 */ const Diskio_drvTypeDef USBH_Driver = { USBH_initialize, USBH_status, USBH_read, #if _USE_WRITE == 1 USBH_write, #endif /* _USE_WRITE == 1 */ #if _USE_IOCTL == 1 USBH_ioctl, #endif /* _USE_IOCTL == 1 */ ...}; Private function prototypes /* Private functions ---------------------------------------------------------*/ /** * @brief Initializes a Drive * @param lun : lun id * @retval DSTATUS: Operation status *//* ... */ DSTATUS USBH_initialize(BYTE lun) { /* CAUTION : USB Host library has to be initialized in the application */ return RES_OK; }{ ... } /** * @brief Gets Disk Status * @param lun : lun id * @retval DSTATUS: Operation status *//* ... */ DSTATUS USBH_status(BYTE lun) { DRESULT res = RES_ERROR; if(USBH_MSC_UnitIsReady(&hUSB_Host, lun)) { res = RES_OK; }if (USBH_MSC_UnitIsReady(&hUSB_Host, lun)) { ... } else { res = RES_ERROR; }else { ... } return res; }{ ... } /** * @brief Reads Sector(s) * @param lun : lun id * @param *buff: Data buffer to store read data * @param sector: Sector address (LBA) * @param count: Number of sectors to read (1..128) * @retval DRESULT: Operation result *//* ... */ DRESULT USBH_read(BYTE lun, BYTE *buff, DWORD sector, UINT count) { DRESULT res = RES_ERROR; MSC_LUNTypeDef info; USBH_StatusTypeDef status = USBH_OK; if (((DWORD)buff & 3) && (((HCD_HandleTypeDef *)hUSB_Host.pData)->Init.dma_enable)) { while ((count--)&&(status == USBH_OK)) { status = USBH_MSC_Read(&hUSB_Host, lun, sector + count, (uint8_t *)scratch, 1); if(status == USBH_OK) { memcpy (&buff[count * _MAX_SS] ,scratch, _MAX_SS); }if (status == USBH_OK) { ... } else { break; }else { ... } }while ((count--)&&(status == USBH_OK)) { ... } }if (((DWORD)buff & 3) && (((HCD_HandleTypeDef *)hUSB_Host.pData)->Init.dma_enable)) { ... } else { status = USBH_MSC_Read(&hUSB_Host, lun, sector, buff, count); }else { ... } if(status == USBH_OK) { res = RES_OK; }if (status == USBH_OK) { ... } else { USBH_MSC_GetLUNInfo(&hUSB_Host, lun, &info); switch (info.sense.asc) { case SCSI_ASC_LOGICAL_UNIT_NOT_READY: case SCSI_ASC_MEDIUM_NOT_PRESENT: case SCSI_ASC_NOT_READY_TO_READY_CHANGE: USBH_ErrLog ("USB Disk is not ready!"); res = RES_NOTRDY; break; case SCSI_ASC_NOT_READY_TO_READY_CHANGE: default: res = RES_ERROR; break;default }switch (info.sense.asc) { ... } }else { ... } return res; }{ ... } /** * @brief Writes Sector(s) * @param lun : lun id * @param *buff: Data to be written * @param sector: Sector address (LBA) * @param count: Number of sectors to write (1..128) * @retval DRESULT: Operation result *//* ... */ #if _USE_WRITE == 1 DRESULT USBH_write(BYTE lun, const BYTE *buff, DWORD sector, UINT count) { DRESULT res = RES_ERROR; MSC_LUNTypeDef info; USBH_StatusTypeDef status = USBH_OK; if (((DWORD)buff & 3) && (((HCD_HandleTypeDef *)hUSB_Host.pData)->Init.dma_enable)) { while (count--) { memcpy (scratch, &buff[count * _MAX_SS], _MAX_SS); status = USBH_MSC_Write(&hUSB_Host, lun, sector + count, (BYTE *)scratch, 1) ; if(status == USBH_FAIL) { break; }if (status == USBH_FAIL) { ... } }while (count--) { ... } }if (((DWORD)buff & 3) && (((HCD_HandleTypeDef *)hUSB_Host.pData)->Init.dma_enable)) { ... } else { status = USBH_MSC_Write(&hUSB_Host, lun, sector, (BYTE *)buff, count); }else { ... } if(status == USBH_OK) { res = RES_OK; }if (status == USBH_OK) { ... } else { USBH_MSC_GetLUNInfo(&hUSB_Host, lun, &info); switch (info.sense.asc) { case SCSI_ASC_WRITE_PROTECTED: USBH_ErrLog("USB Disk is Write protected!"); res = RES_WRPRT; break; case SCSI_ASC_WRITE_PROTECTED: case SCSI_ASC_LOGICAL_UNIT_NOT_READY: case SCSI_ASC_MEDIUM_NOT_PRESENT: case SCSI_ASC_NOT_READY_TO_READY_CHANGE: USBH_ErrLog("USB Disk is not ready!"); res = RES_NOTRDY; break; case SCSI_ASC_NOT_READY_TO_READY_CHANGE: default: res = RES_ERROR; break;default }switch (info.sense.asc) { ... } }else { ... } return res; }{ ... } /* ... */#endif /* _USE_WRITE == 1 */ /** * @brief I/O control operation * @param lun : lun id * @param cmd: Control code * @param *buff: Buffer to send/receive control data * @retval DRESULT: Operation result *//* ... */ #if _USE_IOCTL == 1 DRESULT USBH_ioctl(BYTE lun, BYTE cmd, void *buff) { DRESULT res = RES_ERROR; MSC_LUNTypeDef info; switch (cmd) { /* Make sure that no pending write process */ case CTRL_SYNC: res = RES_OK; break; /* Get number of sectors on the disk (DWORD) */case CTRL_SYNC: case GET_SECTOR_COUNT : if(USBH_MSC_GetLUNInfo(&hUSB_Host, lun, &info) == USBH_OK) { *(DWORD*)buff = info.capacity.block_nbr; res = RES_OK; }if (USBH_MSC_GetLUNInfo(&hUSB_Host, lun, &info) == USBH_OK) { ... } else { res = RES_ERROR; }else { ... } break; /* Get R/W sector size (WORD) */case GET_SECTOR_COUNT : case GET_SECTOR_SIZE : if(USBH_MSC_GetLUNInfo(&hUSB_Host, lun, &info) == USBH_OK) { *(DWORD*)buff = info.capacity.block_size; res = RES_OK; }if (USBH_MSC_GetLUNInfo(&hUSB_Host, lun, &info) == USBH_OK) { ... } else { res = RES_ERROR; }else { ... } break; /* Get erase block size in unit of sector (DWORD) */case GET_SECTOR_SIZE : case GET_BLOCK_SIZE : if(USBH_MSC_GetLUNInfo(&hUSB_Host, lun, &info) == USBH_OK) { *(DWORD*)buff = info.capacity.block_size / USB_DEFAULT_BLOCK_SIZE; res = RES_OK; }if (USBH_MSC_GetLUNInfo(&hUSB_Host, lun, &info) == USBH_OK) { ... } else { res = RES_ERROR; }else { ... } break; case GET_BLOCK_SIZE : default: res = RES_PARERR;default }switch (cmd) { ... } return res; }{ ... } /* ... */#endifPrivate functions /* _USE_IOCTL == 1 */
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