Cong Vu / Mbed 2 deprecated Project2_cvu31

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Dependencies:   mbed wave_player 4DGL-uLCD-SE MMA8452

SDFileSystem/FATFileSystem/ChaN/diskio.cpp@0:24041b847eb5, 2020-11-25 (annotated)

Committer:
congvu
Date:
Wed Nov 25 04:25:25 2020 +0000
Revision:
0:24041b847eb5
ECE2035 SNAKE GAME;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
congvu 0:24041b847eb5 1 /*-----------------------------------------------------------------------*/
congvu 0:24041b847eb5 2 /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2007 */
congvu 0:24041b847eb5 3 /*-----------------------------------------------------------------------*/
congvu 0:24041b847eb5 4 /* This is a stub disk I/O module that acts as front end of the existing */
congvu 0:24041b847eb5 5 /* disk I/O modules and attach it to FatFs module with common interface. */
congvu 0:24041b847eb5 6 /*-----------------------------------------------------------------------*/
congvu 0:24041b847eb5 7 #include "ffconf.h"
congvu 0:24041b847eb5 8 #include "diskio.h"
congvu 0:24041b847eb5 9
congvu 0:24041b847eb5 10 #include "mbed_debug.h"
congvu 0:24041b847eb5 11 #include "FATFileSystem.h"
congvu 0:24041b847eb5 12
congvu 0:24041b847eb5 13 using namespace mbed;
congvu 0:24041b847eb5 14
congvu 0:24041b847eb5 15 DSTATUS disk_initialize (
congvu 0:24041b847eb5 16 BYTE drv /* Physical drive nmuber (0..) */
congvu 0:24041b847eb5 17 )
congvu 0:24041b847eb5 18 {
congvu 0:24041b847eb5 19 debug_if(FFS_DBG, "disk_initialize on drv [%d]\n", drv);
congvu 0:24041b847eb5 20 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_initialize();
congvu 0:24041b847eb5 21 }
congvu 0:24041b847eb5 22
congvu 0:24041b847eb5 23 DSTATUS disk_status (
congvu 0:24041b847eb5 24 BYTE drv /* Physical drive nmuber (0..) */
congvu 0:24041b847eb5 25 )
congvu 0:24041b847eb5 26 {
congvu 0:24041b847eb5 27 debug_if(FFS_DBG, "disk_status on drv [%d]\n", drv);
congvu 0:24041b847eb5 28 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_status();
congvu 0:24041b847eb5 29 }
congvu 0:24041b847eb5 30
congvu 0:24041b847eb5 31 DRESULT disk_read (
congvu 0:24041b847eb5 32 BYTE drv, /* Physical drive nmuber (0..) */
congvu 0:24041b847eb5 33 BYTE *buff, /* Data buffer to store read data */
congvu 0:24041b847eb5 34 DWORD sector, /* Sector address (LBA) */
congvu 0:24041b847eb5 35 BYTE count /* Number of sectors to read (1..255) */
congvu 0:24041b847eb5 36 )
congvu 0:24041b847eb5 37 {
congvu 0:24041b847eb5 38 debug_if(FFS_DBG, "disk_read(sector %d, count %d) on drv [%d]\n", sector, count, drv);
congvu 0:24041b847eb5 39 for(DWORD s=sector; s<sector+count; s++) {
congvu 0:24041b847eb5 40 debug_if(FFS_DBG, " disk_read(sector %d)\n", s);
congvu 0:24041b847eb5 41 int res = FATFileSystem::_ffs[drv]->disk_read((uint8_t*)buff, s);
congvu 0:24041b847eb5 42 if(res) {
congvu 0:24041b847eb5 43 return RES_PARERR;
congvu 0:24041b847eb5 44 }
congvu 0:24041b847eb5 45 buff += 512;
congvu 0:24041b847eb5 46 }
congvu 0:24041b847eb5 47 return RES_OK;
congvu 0:24041b847eb5 48 }
congvu 0:24041b847eb5 49
congvu 0:24041b847eb5 50 #if _READONLY == 0
congvu 0:24041b847eb5 51 DRESULT disk_write (
congvu 0:24041b847eb5 52 BYTE drv, /* Physical drive nmuber (0..) */
congvu 0:24041b847eb5 53 const BYTE *buff, /* Data to be written */
congvu 0:24041b847eb5 54 DWORD sector, /* Sector address (LBA) */
congvu 0:24041b847eb5 55 BYTE count /* Number of sectors to write (1..255) */
congvu 0:24041b847eb5 56 )
congvu 0:24041b847eb5 57 {
congvu 0:24041b847eb5 58 debug_if(FFS_DBG, "disk_write(sector %d, count %d) on drv [%d]\n", sector, count, drv);
congvu 0:24041b847eb5 59 for(DWORD s = sector; s < sector + count; s++) {
congvu 0:24041b847eb5 60 debug_if(FFS_DBG, " disk_write(sector %d)\n", s);
congvu 0:24041b847eb5 61 int res = FATFileSystem::_ffs[drv]->disk_write((uint8_t*)buff, s);
congvu 0:24041b847eb5 62 if(res) {
congvu 0:24041b847eb5 63 return RES_PARERR;
congvu 0:24041b847eb5 64 }
congvu 0:24041b847eb5 65 buff += 512;
congvu 0:24041b847eb5 66 }
congvu 0:24041b847eb5 67 return RES_OK;
congvu 0:24041b847eb5 68 }
congvu 0:24041b847eb5 69 #endif /* _READONLY */
congvu 0:24041b847eb5 70
congvu 0:24041b847eb5 71 DRESULT disk_ioctl (
congvu 0:24041b847eb5 72 BYTE drv, /* Physical drive nmuber (0..) */
congvu 0:24041b847eb5 73 BYTE ctrl, /* Control code */
congvu 0:24041b847eb5 74 void *buff /* Buffer to send/receive control data */
congvu 0:24041b847eb5 75 )
congvu 0:24041b847eb5 76 {
congvu 0:24041b847eb5 77 debug_if(FFS_DBG, "disk_ioctl(%d)\n", ctrl);
congvu 0:24041b847eb5 78 switch(ctrl) {
congvu 0:24041b847eb5 79 case CTRL_SYNC:
congvu 0:24041b847eb5 80 if(FATFileSystem::_ffs[drv] == NULL) {
congvu 0:24041b847eb5 81 return RES_NOTRDY;
congvu 0:24041b847eb5 82 } else if(FATFileSystem::_ffs[drv]->disk_sync()) {
congvu 0:24041b847eb5 83 return RES_ERROR;
congvu 0:24041b847eb5 84 }
congvu 0:24041b847eb5 85 return RES_OK;
congvu 0:24041b847eb5 86 case GET_SECTOR_COUNT:
congvu 0:24041b847eb5 87 if(FATFileSystem::_ffs[drv] == NULL) {
congvu 0:24041b847eb5 88 return RES_NOTRDY;
congvu 0:24041b847eb5 89 } else {
congvu 0:24041b847eb5 90 DWORD res = FATFileSystem::_ffs[drv]->disk_sectors();
congvu 0:24041b847eb5 91 if(res > 0) {
congvu 0:24041b847eb5 92 *((DWORD*)buff) = res; // minimum allowed
congvu 0:24041b847eb5 93 return RES_OK;
congvu 0:24041b847eb5 94 } else {
congvu 0:24041b847eb5 95 return RES_ERROR;
congvu 0:24041b847eb5 96 }
congvu 0:24041b847eb5 97 }
congvu 0:24041b847eb5 98 case GET_BLOCK_SIZE:
congvu 0:24041b847eb5 99 *((DWORD*)buff) = 1; // default when not known
congvu 0:24041b847eb5 100 return RES_OK;
congvu 0:24041b847eb5 101
congvu 0:24041b847eb5 102 }
congvu 0:24041b847eb5 103 return RES_PARERR;
congvu 0:24041b847eb5 104 }