Projects/Incomplete/StandaloneProgrammer/Lib/PetiteFATFs/diskio.c

   1 /*-----------------------------------------------------------------------*/
   2 /* Low level disk I/O module skeleton for Petit FatFs (C)ChaN, 2009      */
   3 /*-----------------------------------------------------------------------*/
   4
   5 #include "diskio.h"
   6
   7 #include <string.h>
   8 #include <LUFA/Drivers/USB/Class/MassStorage.h>
   9 #include "../DataflashManager.h"
  10 #include "../../DiskHost.h"
  11
  12 /*-----------------------------------------------------------------------*/
  13 /* Initialize Disk Drive                                                 */
  14 /*-----------------------------------------------------------------------*/
  15
  16 DSTATUS disk_initialize (void)
  17 {
  18         return RES_OK;
  19 }
  20
  21
  22
  23 /*-----------------------------------------------------------------------*/
  24 /* Read Partial Sector                                                   */
  25 /*-----------------------------------------------------------------------*/
  26
  27 DRESULT disk_readp (
  28         BYTE* dest,                     /* Pointer to the destination object */
  29         DWORD sector,           /* Sector number (LBA) */
  30         WORD sofs,                      /* Offset in the sector */
  31         WORD count                      /* Byte count (bit15:destination) */
  32 )
  33 {
  34         DRESULT ErrorCode = RES_OK;
  35         uint8_t BlockTemp[512];
  36
  37         if (USB_CurrentMode == USB_MODE_Host)
  38         {
  39                 #if defined(USB_CAN_BE_HOST)
  40                 if (USB_HostState != HOST_STATE_Configured)
  41                   ErrorCode = RES_NOTRDY;
  42                 else if (MS_Host_ReadDeviceBlocks(&DiskHost_MS_Interface, 0, sector, 1, 512, BlockTemp))
  43                   ErrorCode = RES_ERROR;
  44                 #endif
  45         }
  46         else
  47         {
  48                 #if defined(USB_CAN_BE_DEVICE)
  49                 DataflashManager_ReadBlocks_RAM(sector, 1, BlockTemp);
  50                 #endif
  51         }
  52
  53         memcpy(dest, &BlockTemp[sofs], count);
  54
  55         return ErrorCode;
  56 }
  57