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Dependencies:   mbed

SDFileSystem/FATFileSystem/ChaN/diskio.cpp@140:d8634e76ecce, 2019-05-09 (annotated)

Committer:
jamesheavey
Date:
Thu May 09 14:36:51 2019 +0000
Revision:
140:d8634e76ecce
Parent:
129:b47c28c7eaaf 
Final Submission. I have read and agreed with Statement of Academic Integrity.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jamesheavey 129:b47c28c7eaaf 1 /*-----------------------------------------------------------------------*/
jamesheavey 129:b47c28c7eaaf 2 /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2014 */
jamesheavey 129:b47c28c7eaaf 3 /*-----------------------------------------------------------------------*/
jamesheavey 129:b47c28c7eaaf 4 /* If a working storage control module is available, it should be */
jamesheavey 129:b47c28c7eaaf 5 /* attached to the FatFs via a glue function rather than modifying it. */
jamesheavey 129:b47c28c7eaaf 6 /* This is an example of glue functions to attach various exsisting */
jamesheavey 129:b47c28c7eaaf 7 /* storage control modules to the FatFs module with a defined API. */
jamesheavey 129:b47c28c7eaaf 8 /*-----------------------------------------------------------------------*/
jamesheavey 129:b47c28c7eaaf 9
jamesheavey 129:b47c28c7eaaf 10 #include "diskio.h"
jamesheavey 129:b47c28c7eaaf 11 #include "mbed_debug.h"
jamesheavey 129:b47c28c7eaaf 12 #include "FATFileSystem.h"
jamesheavey 129:b47c28c7eaaf 13
jamesheavey 129:b47c28c7eaaf 14 using namespace mbed;
jamesheavey 129:b47c28c7eaaf 15
jamesheavey 129:b47c28c7eaaf 16 /*-----------------------------------------------------------------------*/
jamesheavey 129:b47c28c7eaaf 17 /* Get Drive Status */
jamesheavey 129:b47c28c7eaaf 18 /*-----------------------------------------------------------------------*/
jamesheavey 129:b47c28c7eaaf 19
jamesheavey 129:b47c28c7eaaf 20 DSTATUS disk_status (
jamesheavey 129:b47c28c7eaaf 21 BYTE pdrv /* Physical drive nmuber to identify the drive */
jamesheavey 129:b47c28c7eaaf 22 )
jamesheavey 129:b47c28c7eaaf 23 {
jamesheavey 129:b47c28c7eaaf 24 debug_if(FFS_DBG, "disk_status on pdrv [%d]\n", pdrv);
jamesheavey 129:b47c28c7eaaf 25 return (DSTATUS)FATFileSystem::_ffs[pdrv]->disk_status();
jamesheavey 129:b47c28c7eaaf 26 }
jamesheavey 129:b47c28c7eaaf 27
jamesheavey 129:b47c28c7eaaf 28 /*-----------------------------------------------------------------------*/
jamesheavey 129:b47c28c7eaaf 29 /* Inidialize a Drive */
jamesheavey 129:b47c28c7eaaf 30 /*-----------------------------------------------------------------------*/
jamesheavey 129:b47c28c7eaaf 31
jamesheavey 129:b47c28c7eaaf 32 DSTATUS disk_initialize (
jamesheavey 129:b47c28c7eaaf 33 BYTE pdrv /* Physical drive nmuber to identify the drive */
jamesheavey 129:b47c28c7eaaf 34 )
jamesheavey 129:b47c28c7eaaf 35 {
jamesheavey 129:b47c28c7eaaf 36 debug_if(FFS_DBG, "disk_initialize on pdrv [%d]\n", pdrv);
jamesheavey 129:b47c28c7eaaf 37 return (DSTATUS)FATFileSystem::_ffs[pdrv]->disk_initialize();
jamesheavey 129:b47c28c7eaaf 38 }
jamesheavey 129:b47c28c7eaaf 39
jamesheavey 129:b47c28c7eaaf 40 /*-----------------------------------------------------------------------*/
jamesheavey 129:b47c28c7eaaf 41 /* Read Sector(s) */
jamesheavey 129:b47c28c7eaaf 42 /*-----------------------------------------------------------------------*/
jamesheavey 129:b47c28c7eaaf 43
jamesheavey 129:b47c28c7eaaf 44 DRESULT disk_read (
jamesheavey 129:b47c28c7eaaf 45 BYTE pdrv, /* Physical drive nmuber to identify the drive */
jamesheavey 129:b47c28c7eaaf 46 BYTE* buff, /* Data buffer to store read data */
jamesheavey 129:b47c28c7eaaf 47 DWORD sector, /* Sector address in LBA */
jamesheavey 129:b47c28c7eaaf 48 UINT count /* Number of sectors to read */
jamesheavey 129:b47c28c7eaaf 49 )
jamesheavey 129:b47c28c7eaaf 50 {
jamesheavey 129:b47c28c7eaaf 51 debug_if(FFS_DBG, "disk_read(sector %d, count %d) on pdrv [%d]\n", sector, count, pdrv);
jamesheavey 129:b47c28c7eaaf 52 if (FATFileSystem::_ffs[pdrv]->disk_read((uint8_t*)buff, sector, count))
jamesheavey 129:b47c28c7eaaf 53 return RES_PARERR;
jamesheavey 129:b47c28c7eaaf 54 else
jamesheavey 129:b47c28c7eaaf 55 return RES_OK;
jamesheavey 129:b47c28c7eaaf 56 }
jamesheavey 129:b47c28c7eaaf 57
jamesheavey 129:b47c28c7eaaf 58 /*-----------------------------------------------------------------------*/
jamesheavey 129:b47c28c7eaaf 59 /* Write Sector(s) */
jamesheavey 129:b47c28c7eaaf 60 /*-----------------------------------------------------------------------*/
jamesheavey 129:b47c28c7eaaf 61
jamesheavey 129:b47c28c7eaaf 62 #if _USE_WRITE
jamesheavey 129:b47c28c7eaaf 63 DRESULT disk_write (
jamesheavey 129:b47c28c7eaaf 64 BYTE pdrv, /* Physical drive nmuber to identify the drive */
jamesheavey 129:b47c28c7eaaf 65 const BYTE* buff, /* Data to be written */
jamesheavey 129:b47c28c7eaaf 66 DWORD sector, /* Sector address in LBA */
jamesheavey 129:b47c28c7eaaf 67 UINT count /* Number of sectors to write */
jamesheavey 129:b47c28c7eaaf 68 )
jamesheavey 129:b47c28c7eaaf 69 {
jamesheavey 129:b47c28c7eaaf 70 debug_if(FFS_DBG, "disk_write(sector %d, count %d) on pdrv [%d]\n", sector, count, pdrv);
jamesheavey 129:b47c28c7eaaf 71 if (FATFileSystem::_ffs[pdrv]->disk_write((uint8_t*)buff, sector, count))
jamesheavey 129:b47c28c7eaaf 72 return RES_PARERR;
jamesheavey 129:b47c28c7eaaf 73 else
jamesheavey 129:b47c28c7eaaf 74 return RES_OK;
jamesheavey 129:b47c28c7eaaf 75 }
jamesheavey 129:b47c28c7eaaf 76 #endif
jamesheavey 129:b47c28c7eaaf 77
jamesheavey 129:b47c28c7eaaf 78 /*-----------------------------------------------------------------------*/
jamesheavey 129:b47c28c7eaaf 79 /* Miscellaneous Functions */
jamesheavey 129:b47c28c7eaaf 80 /*-----------------------------------------------------------------------*/
jamesheavey 129:b47c28c7eaaf 81
jamesheavey 129:b47c28c7eaaf 82 #if _USE_IOCTL
jamesheavey 129:b47c28c7eaaf 83 DRESULT disk_ioctl (
jamesheavey 129:b47c28c7eaaf 84 BYTE pdrv, /* Physical drive nmuber (0..) */
jamesheavey 129:b47c28c7eaaf 85 BYTE cmd, /* Control code */
jamesheavey 129:b47c28c7eaaf 86 void* buff /* Buffer to send/receive control data */
jamesheavey 129:b47c28c7eaaf 87 )
jamesheavey 129:b47c28c7eaaf 88 {
jamesheavey 129:b47c28c7eaaf 89 debug_if(FFS_DBG, "disk_ioctl(%d)\n", cmd);
jamesheavey 129:b47c28c7eaaf 90 switch(cmd) {
jamesheavey 129:b47c28c7eaaf 91 case CTRL_SYNC:
jamesheavey 129:b47c28c7eaaf 92 if(FATFileSystem::_ffs[pdrv] == NULL) {
jamesheavey 129:b47c28c7eaaf 93 return RES_NOTRDY;
jamesheavey 129:b47c28c7eaaf 94 } else if(FATFileSystem::_ffs[pdrv]->disk_sync()) {
jamesheavey 129:b47c28c7eaaf 95 return RES_ERROR;
jamesheavey 129:b47c28c7eaaf 96 }
jamesheavey 129:b47c28c7eaaf 97 return RES_OK;
jamesheavey 129:b47c28c7eaaf 98 case GET_SECTOR_COUNT:
jamesheavey 129:b47c28c7eaaf 99 if(FATFileSystem::_ffs[pdrv] == NULL) {
jamesheavey 129:b47c28c7eaaf 100 return RES_NOTRDY;
jamesheavey 129:b47c28c7eaaf 101 } else {
jamesheavey 129:b47c28c7eaaf 102 DWORD res = FATFileSystem::_ffs[pdrv]->disk_sectors();
jamesheavey 129:b47c28c7eaaf 103 if(res > 0) {
jamesheavey 129:b47c28c7eaaf 104 *((DWORD*)buff) = res; // minimum allowed
jamesheavey 129:b47c28c7eaaf 105 return RES_OK;
jamesheavey 129:b47c28c7eaaf 106 } else {
jamesheavey 129:b47c28c7eaaf 107 return RES_ERROR;
jamesheavey 129:b47c28c7eaaf 108 }
jamesheavey 129:b47c28c7eaaf 109 }
jamesheavey 129:b47c28c7eaaf 110 case GET_BLOCK_SIZE:
jamesheavey 129:b47c28c7eaaf 111 *((DWORD*)buff) = 1; // default when not known
jamesheavey 129:b47c28c7eaaf 112 return RES_OK;
jamesheavey 129:b47c28c7eaaf 113
jamesheavey 129:b47c28c7eaaf 114 }
jamesheavey 129:b47c28c7eaaf 115 return RES_PARERR;
jamesheavey 129:b47c28c7eaaf 116 }
jamesheavey 129:b47c28c7eaaf 117 #endif