diff options
Diffstat (limited to 'lib/fatfs/diskio.c')
| -rw-r--r-- | lib/fatfs/diskio.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/lib/fatfs/diskio.c b/lib/fatfs/diskio.c new file mode 100644 index 0000000000..169ae95ead --- /dev/null +++ b/lib/fatfs/diskio.c @@ -0,0 +1,230 @@ +/*-----------------------------------------------------------------------*/
+/* 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 modules to the FatFs module with a defined API. */
+/*-----------------------------------------------------------------------*/
+
+#include "diskio.h" /* FatFs lower layer API */
+#include "usbdisk.h" /* Example: USB drive control */
+#include "atadrive.h" /* Example: ATA drive control */
+#include "sdcard.h" /* Example: MMC/SDC contorl */
+
+/* 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 */
+
+
+/*-----------------------------------------------------------------------*/
+/* Get Drive Status */
+/*-----------------------------------------------------------------------*/
+
+DSTATUS disk_status (
+ BYTE pdrv /* Physical drive nmuber to identify the drive */
+)
+{
+ DSTATUS stat;
+ int result;
+
+ switch (pdrv) {
+ case ATA :
+ result = ATA_disk_status();
+
+ // translate the reslut code here
+
+ return stat;
+
+ case MMC :
+ result = MMC_disk_status();
+
+ // translate the reslut code here
+
+ return stat;
+
+ case USB :
+ result = USB_disk_status();
+
+ // translate the reslut code here
+
+ return stat;
+ }
+ return STA_NOINIT;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Inidialize a Drive */
+/*-----------------------------------------------------------------------*/
+
+DSTATUS disk_initialize (
+ BYTE pdrv /* Physical drive nmuber to identify the drive */
+)
+{
+ DSTATUS stat;
+ int result;
+
+ switch (pdrv) {
+ case ATA :
+ result = ATA_disk_initialize();
+
+ // translate the reslut code here
+
+ return stat;
+
+ case MMC :
+ result = MMC_disk_initialize();
+
+ // translate the reslut code here
+
+ return stat;
+
+ case USB :
+ result = USB_disk_initialize();
+
+ // translate the reslut code here
+
+ return stat;
+ }
+ return STA_NOINIT;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Read Sector(s) */
+/*-----------------------------------------------------------------------*/
+
+DRESULT disk_read (
+ BYTE pdrv, /* Physical drive nmuber to identify the drive */
+ BYTE *buff, /* Data buffer to store read data */
+ DWORD sector, /* Sector address in LBA */
+ UINT count /* Number of sectors to read */
+)
+{
+ DRESULT res;
+ int result;
+
+ switch (pdrv) {
+ case ATA :
+ // translate the arguments here
+
+ result = ATA_disk_read(buff, sector, count);
+
+ // translate the reslut code here
+
+ return res;
+
+ case MMC :
+ // translate the arguments here
+
+ result = MMC_disk_read(buff, sector, count);
+
+ // translate the reslut code here
+
+ return res;
+
+ case USB :
+ // translate the arguments here
+
+ result = USB_disk_read(buff, sector, count);
+
+ // translate the reslut code here
+
+ return res;
+ }
+
+ return RES_PARERR;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Write Sector(s) */
+/*-----------------------------------------------------------------------*/
+
+#if _USE_WRITE
+DRESULT disk_write (
+ BYTE pdrv, /* Physical drive nmuber to identify the drive */
+ const BYTE *buff, /* Data to be written */
+ DWORD sector, /* Sector address in LBA */
+ UINT count /* Number of sectors to write */
+)
+{
+ DRESULT res;
+ int result;
+
+ switch (pdrv) {
+ case ATA :
+ // translate the arguments here
+
+ result = ATA_disk_write(buff, sector, count);
+
+ // translate the reslut code here
+
+ return res;
+
+ case MMC :
+ // translate the arguments here
+
+ result = MMC_disk_write(buff, sector, count);
+
+ // translate the reslut code here
+
+ return res;
+
+ case USB :
+ // translate the arguments here
+
+ result = USB_disk_write(buff, sector, count);
+
+ // translate the reslut code here
+
+ return res;
+ }
+
+ return RES_PARERR;
+}
+#endif
+
+
+/*-----------------------------------------------------------------------*/
+/* Miscellaneous Functions */
+/*-----------------------------------------------------------------------*/
+
+#if _USE_IOCTL
+DRESULT disk_ioctl (
+ BYTE pdrv, /* Physical drive nmuber (0..) */
+ BYTE cmd, /* Control code */
+ void *buff /* Buffer to send/receive control data */
+)
+{
+ DRESULT res;
+ int result;
+
+ switch (pdrv) {
+ case ATA :
+
+ // Process of the command for the ATA drive
+
+ return res;
+
+ case MMC :
+
+ // Process of the command for the MMC/SD card
+
+ return res;
+
+ case USB :
+
+ // Process of the command the USB drive
+
+ return res;
+ }
+
+ return RES_PARERR;
+}
+#endif
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