Diff: ChaN/diskio.cpp

Revision:

1:46ce1e16c870

Child:

2:b6669c987c8e

diff -r a846fcbeb0a2 -r 46ce1e16c870 ChaN/diskio.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ChaN/diskio.cpp	Tue Nov 27 17:31:18 2012 +0000
@@ -0,0 +1,104 @@
+/*-----------------------------------------------------------------------*/
+/* Low level disk I/O module skeleton for FatFs     (C)ChaN, 2007        */
+/*-----------------------------------------------------------------------*/
+/* This is a stub disk I/O module that acts as front end of the existing */
+/* disk I/O modules and attach it to FatFs module with common interface. */
+/*-----------------------------------------------------------------------*/
+#include "ffconf.h"
+#include "diskio.h"
+
+#include "debug.h"
+#include "FATFileSystem.h"
+
+using namespace mbed;
+
+DSTATUS disk_initialize (
+    BYTE drv                /* Physical drive nmuber (0..) */
+) 
+{
+    debug_if(FFS_DBG, "disk_initialize on drv [%d]\n", drv);
+    return (DSTATUS)FATFileSystem::_ffs[drv]->disk_initialize();
+}
+
+DSTATUS disk_status (
+    BYTE drv        /* Physical drive nmuber (0..) */
+) 
+{
+    debug_if(FFS_DBG, "disk_status on drv [%d]\n", drv);
+    return (DSTATUS)FATFileSystem::_ffs[drv]->disk_status();
+}
+
+DRESULT disk_read (
+    BYTE drv,        /* Physical drive nmuber (0..) */
+    BYTE *buff,        /* Data buffer to store read data */
+    DWORD sector,    /* Sector address (LBA) */
+    BYTE count        /* Number of sectors to read (1..255) */
+)
+{
+    debug_if(FFS_DBG, "disk_read(sector %d, count %d) on drv [%d]\n", sector, count, drv);
+    for(DWORD s=sector; s<sector+count; s++) {
+        debug_if(FFS_DBG, " disk_read(sector %d)\n", s);
+        int res = FATFileSystem::_ffs[drv]->disk_read((uint8_t*)buff, s);
+        if(res) {
+            return RES_PARERR;
+        }
+        buff += 512;
+    }
+    return RES_OK;
+}
+
+#if _READONLY == 0
+DRESULT disk_write (
+    BYTE drv,            /* Physical drive nmuber (0..) */
+    const BYTE *buff,    /* Data to be written */
+    DWORD sector,        /* Sector address (LBA) */
+    BYTE count            /* Number of sectors to write (1..255) */
+)
+{
+    debug_if(FFS_DBG, "disk_write(sector %d, count %d) on drv [%d]\n", sector, count, drv);
+    for(DWORD s = sector; s < sector + count; s++) {
+        debug_if(FFS_DBG, " disk_write(sector %d)\n", s);
+        int res = FATFileSystem::_ffs[drv]->disk_write((uint8_t*)buff, s);
+        if(res) {
+            return RES_PARERR;
+        }
+        buff += 512;
+    }
+    return RES_OK;
+}
+#endif /* _READONLY */
+
+DRESULT disk_ioctl (
+    BYTE drv,        /* Physical drive nmuber (0..) */
+    BYTE ctrl,        /* Control code */
+    void *buff        /* Buffer to send/receive control data */
+)
+{
+    debug_if(FFS_DBG, "disk_ioctl(%d)\n", ctrl);
+    switch(ctrl) {
+        case CTRL_SYNC:
+            if(FATFileSystem::_ffs[drv] == NULL) {
+                return RES_NOTRDY;
+            } else if(FATFileSystem::_ffs[drv]->disk_sync()) {
+                return RES_ERROR;
+            }
+            return RES_OK;
+        case GET_SECTOR_COUNT:
+            if(FATFileSystem::_ffs[drv] == NULL) {
+                return RES_NOTRDY;
+            } else {
+                DWORD res = FATFileSystem::_ffs[drv]->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;
+}