diff options
Diffstat (limited to 'fatfs/src/diskio.c')
| -rw-r--r-- | fatfs/src/diskio.c | 66 |
1 files changed, 30 insertions, 36 deletions
diff --git a/fatfs/src/diskio.c b/fatfs/src/diskio.c index 64194eb..169ae95 100644 --- a/fatfs/src/diskio.c +++ b/fatfs/src/diskio.c @@ -1,10 +1,10 @@ /*-----------------------------------------------------------------------*/
-/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2013 */
+/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2014 */
/*-----------------------------------------------------------------------*/
/* If a working storage control module is available, it should be */
/* attached to the FatFs via a glue function rather than modifying it. */
/* This is an example of glue functions to attach various exsisting */
-/* storage control module to the FatFs module with a defined API. */
+/* storage control modules to the FatFs module with a defined API. */
/*-----------------------------------------------------------------------*/
#include "diskio.h" /* FatFs lower layer API */
@@ -12,18 +12,18 @@ #include "atadrive.h" /* Example: ATA drive control */
#include "sdcard.h" /* Example: MMC/SDC contorl */
-/* Definitions of physical drive number for each media */
-#define ATA 0
-#define MMC 1
-#define USB 2
+/* Definitions of physical drive number for each drive */
+#define ATA 0 /* Example: Map ATA drive to drive number 0 */
+#define MMC 1 /* Example: Map MMC/SD card to drive number 1 */
+#define USB 2 /* Example: Map USB drive to drive number 2 */
/*-----------------------------------------------------------------------*/
-/* Inidialize a Drive */
+/* Get Drive Status */
/*-----------------------------------------------------------------------*/
-DSTATUS disk_initialize (
- BYTE pdrv /* Physical drive nmuber (0..) */
+DSTATUS disk_status (
+ BYTE pdrv /* Physical drive nmuber to identify the drive */
)
{
DSTATUS stat;
@@ -31,21 +31,21 @@ DSTATUS disk_initialize ( switch (pdrv) {
case ATA :
- result = ATA_disk_initialize();
+ result = ATA_disk_status();
// translate the reslut code here
return stat;
case MMC :
- result = MMC_disk_initialize();
+ result = MMC_disk_status();
// translate the reslut code here
return stat;
case USB :
- result = USB_disk_initialize();
+ result = USB_disk_status();
// translate the reslut code here
@@ -57,11 +57,11 @@ DSTATUS disk_initialize ( /*-----------------------------------------------------------------------*/
-/* Get Disk Status */
+/* Inidialize a Drive */
/*-----------------------------------------------------------------------*/
-DSTATUS disk_status (
- BYTE pdrv /* Physical drive nmuber (0..) */
+DSTATUS disk_initialize (
+ BYTE pdrv /* Physical drive nmuber to identify the drive */
)
{
DSTATUS stat;
@@ -69,21 +69,21 @@ DSTATUS disk_status ( switch (pdrv) {
case ATA :
- result = ATA_disk_status();
+ result = ATA_disk_initialize();
// translate the reslut code here
return stat;
case MMC :
- result = MMC_disk_status();
+ result = MMC_disk_initialize();
// translate the reslut code here
return stat;
case USB :
- result = USB_disk_status();
+ result = USB_disk_initialize();
// translate the reslut code here
@@ -99,10 +99,10 @@ DSTATUS disk_status ( /*-----------------------------------------------------------------------*/
DRESULT disk_read (
- BYTE pdrv, /* Physical drive nmuber (0..) */
+ BYTE pdrv, /* Physical drive nmuber to identify the drive */
BYTE *buff, /* Data buffer to store read data */
- DWORD sector, /* Sector address (LBA) */
- UINT count /* Number of sectors to read (1..128) */
+ DWORD sector, /* Sector address in LBA */
+ UINT count /* Number of sectors to read */
)
{
DRESULT res;
@@ -136,6 +136,7 @@ DRESULT disk_read ( return res;
}
+
return RES_PARERR;
}
@@ -147,10 +148,10 @@ DRESULT disk_read ( #if _USE_WRITE
DRESULT disk_write (
- BYTE pdrv, /* Physical drive nmuber (0..) */
+ BYTE pdrv, /* Physical drive nmuber to identify the drive */
const BYTE *buff, /* Data to be written */
- DWORD sector, /* Sector address (LBA) */
- UINT count /* Number of sectors to write (1..128) */
+ DWORD sector, /* Sector address in LBA */
+ UINT count /* Number of sectors to write */
)
{
DRESULT res;
@@ -184,6 +185,7 @@ DRESULT disk_write ( return res;
}
+
return RES_PARERR;
}
#endif
@@ -205,32 +207,24 @@ DRESULT disk_ioctl ( switch (pdrv) {
case ATA :
- // pre-process here
-
- result = ATA_disk_ioctl(cmd, buff);
- // post-process here
+ // Process of the command for the ATA drive
return res;
case MMC :
- // pre-process here
- result = MMC_disk_ioctl(cmd, buff);
-
- // post-process here
+ // Process of the command for the MMC/SD card
return res;
case USB :
- // pre-process here
-
- result = USB_disk_ioctl(cmd, buff);
- // post-process here
+ // Process of the command the USB drive
return res;
}
+
return RES_PARERR;
}
#endif
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