Diff: FATFileSystem/ChaN/diskio.cpp

Revision:

0:3bdfc1556537

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FATFileSystem/ChaN/diskio.cpp	Wed Mar 29 07:00:22 2017 +0000
@@ -0,0 +1,117 @@
+/*-----------------------------------------------------------------------*/
+/* 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"
+#include "mbed_debug.h"
+#include "FATFileSystem.h"
+
+using namespace mbed;
+
+/*-----------------------------------------------------------------------*/
+/* Get Drive Status                                                      */
+/*-----------------------------------------------------------------------*/
+
+DSTATUS disk_status (
+    BYTE pdrv        /* Physical drive nmuber to identify the drive */
+)
+{
+    debug_if(FFS_DBG, "disk_status on pdrv [%d]\n", pdrv);
+    return (DSTATUS)FATFileSystem::_ffs[pdrv]->disk_status();
+}
+
+/*-----------------------------------------------------------------------*/
+/* Inidialize a Drive                                                    */
+/*-----------------------------------------------------------------------*/
+
+DSTATUS disk_initialize (
+    BYTE pdrv        /* Physical drive nmuber to identify the drive */
+)
+{
+    debug_if(FFS_DBG, "disk_initialize on pdrv [%d]\n", pdrv);
+    return (DSTATUS)FATFileSystem::_ffs[pdrv]->disk_initialize();
+}
+
+/*-----------------------------------------------------------------------*/
+/* 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 */
+)
+{
+    debug_if(FFS_DBG, "disk_read(sector %d, count %d) on pdrv [%d]\n", sector, count, pdrv);
+    if (FATFileSystem::_ffs[pdrv]->disk_read((uint8_t*)buff, sector, count))
+        return RES_PARERR;
+    else
+        return RES_OK;
+}
+
+/*-----------------------------------------------------------------------*/
+/* 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 */
+)
+{
+    debug_if(FFS_DBG, "disk_write(sector %d, count %d) on pdrv [%d]\n", sector, count, pdrv);
+    if (FATFileSystem::_ffs[pdrv]->disk_write((uint8_t*)buff, sector, count))
+        return RES_PARERR;
+    else
+        return RES_OK;
+}
+#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 */
+)
+{
+    debug_if(FFS_DBG, "disk_ioctl(%d)\n", cmd);
+    switch(cmd) {
+        case CTRL_SYNC:
+            if(FATFileSystem::_ffs[pdrv] == NULL) {
+                return RES_NOTRDY;
+            } else if(FATFileSystem::_ffs[pdrv]->disk_sync()) {
+                return RES_ERROR;
+            }
+            return RES_OK;
+        case GET_SECTOR_COUNT:
+            if(FATFileSystem::_ffs[pdrv] == NULL) {
+                return RES_NOTRDY;
+            } else {
+                DWORD res = FATFileSystem::_ffs[pdrv]->disk_sectors();
+                if(res > 0) {
+                    *((DWORD*)buff) = res; // minimum allowed
+                    return RES_OK;
+                } else {
+                    return RES_ERROR;
+                }
+            }
+        case GET_BLOCK_SIZE:
+            *((DWORD*)buff) = 1; // default when not known
+            return RES_OK;
+
+    }
+    return RES_PARERR;
+}
+#endif