Mark Schwarzer / SDFileSystem

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Dependents:   Schwarzer_A7_1

FATFileSystem/ChaN/diskio.cpp@0:964d386ab059, 2020-11-09 (annotated)

Committer:
markschwarzer
Date:
Mon Nov 09 14:25:13 2020 +0000
Revision:
0:964d386ab059
logged data in SD card

Who changed what in which revision?

UserRevisionLine numberNew contents of line
markschwarzer 0:964d386ab059 1 /*-----------------------------------------------------------------------*/
markschwarzer 0:964d386ab059 2 /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2014 */
markschwarzer 0:964d386ab059 3 /*-----------------------------------------------------------------------*/
markschwarzer 0:964d386ab059 4 /* If a working storage control module is available, it should be */
markschwarzer 0:964d386ab059 5 /* attached to the FatFs via a glue function rather than modifying it. */
markschwarzer 0:964d386ab059 6 /* This is an example of glue functions to attach various exsisting */
markschwarzer 0:964d386ab059 7 /* storage control modules to the FatFs module with a defined API. */
markschwarzer 0:964d386ab059 8 /*-----------------------------------------------------------------------*/
markschwarzer 0:964d386ab059 9
markschwarzer 0:964d386ab059 10 #include "diskio.h"
markschwarzer 0:964d386ab059 11 #include "mbed_debug.h"
markschwarzer 0:964d386ab059 12 #include "FATFileSystem.h"
markschwarzer 0:964d386ab059 13
markschwarzer 0:964d386ab059 14 using namespace mbed;
markschwarzer 0:964d386ab059 15
markschwarzer 0:964d386ab059 16 /*-----------------------------------------------------------------------*/
markschwarzer 0:964d386ab059 17 /* Get Drive Status */
markschwarzer 0:964d386ab059 18 /*-----------------------------------------------------------------------*/
markschwarzer 0:964d386ab059 19
markschwarzer 0:964d386ab059 20 DSTATUS disk_status (
markschwarzer 0:964d386ab059 21 BYTE pdrv /* Physical drive nmuber to identify the drive */
markschwarzer 0:964d386ab059 22 )
markschwarzer 0:964d386ab059 23 {
markschwarzer 0:964d386ab059 24 debug_if(FFS_DBG, "disk_status on pdrv [%d]\n", pdrv);
markschwarzer 0:964d386ab059 25 return (DSTATUS)FATFileSystem::_ffs[pdrv]->disk_status();
markschwarzer 0:964d386ab059 26 }
markschwarzer 0:964d386ab059 27
markschwarzer 0:964d386ab059 28 /*-----------------------------------------------------------------------*/
markschwarzer 0:964d386ab059 29 /* Inidialize a Drive */
markschwarzer 0:964d386ab059 30 /*-----------------------------------------------------------------------*/
markschwarzer 0:964d386ab059 31
markschwarzer 0:964d386ab059 32 DSTATUS disk_initialize (
markschwarzer 0:964d386ab059 33 BYTE pdrv /* Physical drive nmuber to identify the drive */
markschwarzer 0:964d386ab059 34 )
markschwarzer 0:964d386ab059 35 {
markschwarzer 0:964d386ab059 36 debug_if(FFS_DBG, "disk_initialize on pdrv [%d]\n", pdrv);
markschwarzer 0:964d386ab059 37 return (DSTATUS)FATFileSystem::_ffs[pdrv]->disk_initialize();
markschwarzer 0:964d386ab059 38 }
markschwarzer 0:964d386ab059 39
markschwarzer 0:964d386ab059 40 /*-----------------------------------------------------------------------*/
markschwarzer 0:964d386ab059 41 /* Read Sector(s) */
markschwarzer 0:964d386ab059 42 /*-----------------------------------------------------------------------*/
markschwarzer 0:964d386ab059 43
markschwarzer 0:964d386ab059 44 DRESULT disk_read (
markschwarzer 0:964d386ab059 45 BYTE pdrv, /* Physical drive nmuber to identify the drive */
markschwarzer 0:964d386ab059 46 BYTE* buff, /* Data buffer to store read data */
markschwarzer 0:964d386ab059 47 DWORD sector, /* Sector address in LBA */
markschwarzer 0:964d386ab059 48 UINT count /* Number of sectors to read */
markschwarzer 0:964d386ab059 49 )
markschwarzer 0:964d386ab059 50 {
markschwarzer 0:964d386ab059 51 debug_if(FFS_DBG, "disk_read(sector %d, count %d) on pdrv [%d]\n", sector, count, pdrv);
markschwarzer 0:964d386ab059 52 if (FATFileSystem::_ffs[pdrv]->disk_read((uint8_t*)buff, sector, count))
markschwarzer 0:964d386ab059 53 return RES_PARERR;
markschwarzer 0:964d386ab059 54 else
markschwarzer 0:964d386ab059 55 return RES_OK;
markschwarzer 0:964d386ab059 56 }
markschwarzer 0:964d386ab059 57
markschwarzer 0:964d386ab059 58 /*-----------------------------------------------------------------------*/
markschwarzer 0:964d386ab059 59 /* Write Sector(s) */
markschwarzer 0:964d386ab059 60 /*-----------------------------------------------------------------------*/
markschwarzer 0:964d386ab059 61
markschwarzer 0:964d386ab059 62 #if _USE_WRITE
markschwarzer 0:964d386ab059 63 DRESULT disk_write (
markschwarzer 0:964d386ab059 64 BYTE pdrv, /* Physical drive nmuber to identify the drive */
markschwarzer 0:964d386ab059 65 const BYTE* buff, /* Data to be written */
markschwarzer 0:964d386ab059 66 DWORD sector, /* Sector address in LBA */
markschwarzer 0:964d386ab059 67 UINT count /* Number of sectors to write */
markschwarzer 0:964d386ab059 68 )
markschwarzer 0:964d386ab059 69 {
markschwarzer 0:964d386ab059 70 debug_if(FFS_DBG, "disk_write(sector %d, count %d) on pdrv [%d]\n", sector, count, pdrv);
markschwarzer 0:964d386ab059 71 if (FATFileSystem::_ffs[pdrv]->disk_write((uint8_t*)buff, sector, count))
markschwarzer 0:964d386ab059 72 return RES_PARERR;
markschwarzer 0:964d386ab059 73 else
markschwarzer 0:964d386ab059 74 return RES_OK;
markschwarzer 0:964d386ab059 75 }
markschwarzer 0:964d386ab059 76 #endif
markschwarzer 0:964d386ab059 77
markschwarzer 0:964d386ab059 78 /*-----------------------------------------------------------------------*/
markschwarzer 0:964d386ab059 79 /* Miscellaneous Functions */
markschwarzer 0:964d386ab059 80 /*-----------------------------------------------------------------------*/
markschwarzer 0:964d386ab059 81
markschwarzer 0:964d386ab059 82 #if _USE_IOCTL
markschwarzer 0:964d386ab059 83 DRESULT disk_ioctl (
markschwarzer 0:964d386ab059 84 BYTE pdrv, /* Physical drive nmuber (0..) */
markschwarzer 0:964d386ab059 85 BYTE cmd, /* Control code */
markschwarzer 0:964d386ab059 86 void* buff /* Buffer to send/receive control data */
markschwarzer 0:964d386ab059 87 )
markschwarzer 0:964d386ab059 88 {
markschwarzer 0:964d386ab059 89 debug_if(FFS_DBG, "disk_ioctl(%d)\n", cmd);
markschwarzer 0:964d386ab059 90 switch(cmd) {
markschwarzer 0:964d386ab059 91 case CTRL_SYNC:
markschwarzer 0:964d386ab059 92 if(FATFileSystem::_ffs[pdrv] == NULL) {
markschwarzer 0:964d386ab059 93 return RES_NOTRDY;
markschwarzer 0:964d386ab059 94 } else if(FATFileSystem::_ffs[pdrv]->disk_sync()) {
markschwarzer 0:964d386ab059 95 return RES_ERROR;
markschwarzer 0:964d386ab059 96 }
markschwarzer 0:964d386ab059 97 return RES_OK;
markschwarzer 0:964d386ab059 98 case GET_SECTOR_COUNT:
markschwarzer 0:964d386ab059 99 if(FATFileSystem::_ffs[pdrv] == NULL) {
markschwarzer 0:964d386ab059 100 return RES_NOTRDY;
markschwarzer 0:964d386ab059 101 } else {
markschwarzer 0:964d386ab059 102 DWORD res = FATFileSystem::_ffs[pdrv]->disk_sectors();
markschwarzer 0:964d386ab059 103 if(res > 0) {
markschwarzer 0:964d386ab059 104 *((DWORD*)buff) = res; // minimum allowed
markschwarzer 0:964d386ab059 105 return RES_OK;
markschwarzer 0:964d386ab059 106 } else {
markschwarzer 0:964d386ab059 107 return RES_ERROR;
markschwarzer 0:964d386ab059 108 }
markschwarzer 0:964d386ab059 109 }
markschwarzer 0:964d386ab059 110 case GET_BLOCK_SIZE:
markschwarzer 0:964d386ab059 111 *((DWORD*)buff) = 1; // default when not known
markschwarzer 0:964d386ab059 112 return RES_OK;
markschwarzer 0:964d386ab059 113
markschwarzer 0:964d386ab059 114 }
markschwarzer 0:964d386ab059 115 return RES_PARERR;
markschwarzer 0:964d386ab059 116 }
markschwarzer 0:964d386ab059 117 #endif