Michael Spencer / Mbed 2 deprecated LaOS

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Dependencies:   mbed

FATFileSystem/diskio.cpp@1:f5ac63519541, 2014-03-05 (annotated)

Committer:
Michael J. Spencer
Date:
Wed Mar 05 06:14:02 2014 -0800
Revision:
1:f5ac63519541
Initial commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Michael J. Spencer 1:f5ac63519541 1 /*-----------------------------------------------------------------------*/
Michael J. Spencer 1:f5ac63519541 2 /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2007 */
Michael J. Spencer 1:f5ac63519541 3 /*-----------------------------------------------------------------------*/
Michael J. Spencer 1:f5ac63519541 4 /* This is a stub disk I/O module that acts as front end of the existing */
Michael J. Spencer 1:f5ac63519541 5 /* disk I/O modules and attach it to FatFs module with common interface. */
Michael J. Spencer 1:f5ac63519541 6 /*-----------------------------------------------------------------------*/
Michael J. Spencer 1:f5ac63519541 7
Michael J. Spencer 1:f5ac63519541 8 #include "diskio.h"
Michael J. Spencer 1:f5ac63519541 9 #include <stdio.h>
Michael J. Spencer 1:f5ac63519541 10 #include <string.h>
Michael J. Spencer 1:f5ac63519541 11 #include "FATFileSystem.h"
Michael J. Spencer 1:f5ac63519541 12
Michael J. Spencer 1:f5ac63519541 13 #include "mbed.h"
Michael J. Spencer 1:f5ac63519541 14
Michael J. Spencer 1:f5ac63519541 15 DSTATUS disk_initialize (
Michael J. Spencer 1:f5ac63519541 16 BYTE drv /* Physical drive nmuber (0..) */
Michael J. Spencer 1:f5ac63519541 17 )
Michael J. Spencer 1:f5ac63519541 18 {
Michael J. Spencer 1:f5ac63519541 19 FFSDEBUG("disk_initialize on drv [%d]\n", drv);
Michael J. Spencer 1:f5ac63519541 20 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_initialize();
Michael J. Spencer 1:f5ac63519541 21 }
Michael J. Spencer 1:f5ac63519541 22
Michael J. Spencer 1:f5ac63519541 23 DSTATUS disk_status (
Michael J. Spencer 1:f5ac63519541 24 BYTE drv /* Physical drive nmuber (0..) */
Michael J. Spencer 1:f5ac63519541 25 )
Michael J. Spencer 1:f5ac63519541 26 {
Michael J. Spencer 1:f5ac63519541 27 FFSDEBUG("disk_status on drv [%d]\n", drv);
Michael J. Spencer 1:f5ac63519541 28 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_status();
Michael J. Spencer 1:f5ac63519541 29 }
Michael J. Spencer 1:f5ac63519541 30
Michael J. Spencer 1:f5ac63519541 31 DRESULT disk_read (
Michael J. Spencer 1:f5ac63519541 32 BYTE drv, /* Physical drive nmuber (0..) */
Michael J. Spencer 1:f5ac63519541 33 BYTE *buff, /* Data buffer to store read data */
Michael J. Spencer 1:f5ac63519541 34 DWORD sector, /* Sector address (LBA) */
Michael J. Spencer 1:f5ac63519541 35 BYTE count /* Number of sectors to read (1..255) */
Michael J. Spencer 1:f5ac63519541 36 )
Michael J. Spencer 1:f5ac63519541 37 {
Michael J. Spencer 1:f5ac63519541 38 FFSDEBUG("disk_read(sector %d, count %d) on drv [%d]\n", sector, count, drv);
Michael J. Spencer 1:f5ac63519541 39 for(DWORD s=sector; s<sector+count; s++) {
Michael J. Spencer 1:f5ac63519541 40 FFSDEBUG(" disk_read(sector %d)\n", s);
Michael J. Spencer 1:f5ac63519541 41 int res = FATFileSystem::_ffs[drv]->disk_read((char*)buff, s);
Michael J. Spencer 1:f5ac63519541 42 if(res) {
Michael J. Spencer 1:f5ac63519541 43 return RES_PARERR;
Michael J. Spencer 1:f5ac63519541 44 }
Michael J. Spencer 1:f5ac63519541 45 buff += 512;
Michael J. Spencer 1:f5ac63519541 46 }
Michael J. Spencer 1:f5ac63519541 47 return RES_OK;
Michael J. Spencer 1:f5ac63519541 48 }
Michael J. Spencer 1:f5ac63519541 49
Michael J. Spencer 1:f5ac63519541 50 #if _READONLY == 0
Michael J. Spencer 1:f5ac63519541 51 DRESULT disk_write (
Michael J. Spencer 1:f5ac63519541 52 BYTE drv, /* Physical drive nmuber (0..) */
Michael J. Spencer 1:f5ac63519541 53 const BYTE *buff, /* Data to be written */
Michael J. Spencer 1:f5ac63519541 54 DWORD sector, /* Sector address (LBA) */
Michael J. Spencer 1:f5ac63519541 55 BYTE count /* Number of sectors to write (1..255) */
Michael J. Spencer 1:f5ac63519541 56 )
Michael J. Spencer 1:f5ac63519541 57 {
Michael J. Spencer 1:f5ac63519541 58 FFSDEBUG("disk_write(sector %d, count %d) on drv [%d]\n", sector, count, drv);
Michael J. Spencer 1:f5ac63519541 59 for(DWORD s=sector; s<sector+count; s++) {
Michael J. Spencer 1:f5ac63519541 60 FFSDEBUG(" disk_write(sector %d)\n", s);
Michael J. Spencer 1:f5ac63519541 61 int res = FATFileSystem::_ffs[drv]->disk_write((char*)buff, s);
Michael J. Spencer 1:f5ac63519541 62 if(res) {
Michael J. Spencer 1:f5ac63519541 63 return RES_PARERR;
Michael J. Spencer 1:f5ac63519541 64 }
Michael J. Spencer 1:f5ac63519541 65 buff += 512;
Michael J. Spencer 1:f5ac63519541 66 }
Michael J. Spencer 1:f5ac63519541 67 return RES_OK;
Michael J. Spencer 1:f5ac63519541 68 }
Michael J. Spencer 1:f5ac63519541 69 #endif /* _READONLY */
Michael J. Spencer 1:f5ac63519541 70
Michael J. Spencer 1:f5ac63519541 71 DRESULT disk_ioctl (
Michael J. Spencer 1:f5ac63519541 72 BYTE drv, /* Physical drive nmuber (0..) */
Michael J. Spencer 1:f5ac63519541 73 BYTE ctrl, /* Control code */
Michael J. Spencer 1:f5ac63519541 74 void *buff /* Buffer to send/receive control data */
Michael J. Spencer 1:f5ac63519541 75 )
Michael J. Spencer 1:f5ac63519541 76 {
Michael J. Spencer 1:f5ac63519541 77 FFSDEBUG("disk_ioctl(%d)\n", ctrl);
Michael J. Spencer 1:f5ac63519541 78 switch(ctrl) {
Michael J. Spencer 1:f5ac63519541 79 case CTRL_SYNC:
Michael J. Spencer 1:f5ac63519541 80 if(FATFileSystem::_ffs[drv] == NULL) {
Michael J. Spencer 1:f5ac63519541 81 return RES_NOTRDY;
Michael J. Spencer 1:f5ac63519541 82 } else if(FATFileSystem::_ffs[drv]->disk_sync()) {
Michael J. Spencer 1:f5ac63519541 83 return RES_ERROR;
Michael J. Spencer 1:f5ac63519541 84 }
Michael J. Spencer 1:f5ac63519541 85 return RES_OK;
Michael J. Spencer 1:f5ac63519541 86 case GET_SECTOR_COUNT:
Michael J. Spencer 1:f5ac63519541 87 if(FATFileSystem::_ffs[drv] == NULL) {
Michael J. Spencer 1:f5ac63519541 88 return RES_NOTRDY;
Michael J. Spencer 1:f5ac63519541 89 } else {
Michael J. Spencer 1:f5ac63519541 90 int res = FATFileSystem::_ffs[drv]->disk_sectors();
Michael J. Spencer 1:f5ac63519541 91 if(res > 0) {
Michael J. Spencer 1:f5ac63519541 92 *((DWORD*)buff) = res; // minimum allowed
Michael J. Spencer 1:f5ac63519541 93 return RES_OK;
Michael J. Spencer 1:f5ac63519541 94 } else {
Michael J. Spencer 1:f5ac63519541 95 return RES_ERROR;
Michael J. Spencer 1:f5ac63519541 96 }
Michael J. Spencer 1:f5ac63519541 97 }
Michael J. Spencer 1:f5ac63519541 98 case GET_BLOCK_SIZE:
Michael J. Spencer 1:f5ac63519541 99 *((DWORD*)buff) = 1; // default when not known
Michael J. Spencer 1:f5ac63519541 100 return RES_OK;
Michael J. Spencer 1:f5ac63519541 101
Michael J. Spencer 1:f5ac63519541 102 }
Michael J. Spencer 1:f5ac63519541 103 return RES_PARERR;
Michael J. Spencer 1:f5ac63519541 104 }
Michael J. Spencer 1:f5ac63519541 105