Vergil Cola / SDFileSystem2

A fork of the original SDFileSystem, added only stat() for getting file information.

Dependents:   FRDM_K64F_IOT

Added code to the original SDFileSystem to export the stat() command. It would now be possible to get the FILEINFO struct of a directory entry to get information such as file size, etc.

SDFileSystem2 usage

#include "SDFileSystem.h"
SDFileSystem sd(p5,p6,p7,p8,"sd"); // mosi, miso, sck, cs 

static void cmd_ls(Stream * chp, int argc, char * argv[])
{
   DIR * dp;
   struct dirent * dirp;
   FILINFO fileInfo;
   char dirroot[256];
   
   if (argc >= 1)
       sprintf(dirroot, "/sd/%s", argv[0]);
   else
       sprintf(dirroot, "/sd");
   
   chp->printf("Listing directory [%s]\r\n", dirroot);
   
   dp = opendir(dirroot);			
   while((dirp = readdir(dp)) != NULL)
   {
       if (sd.stat(dirp->d_name, &fileInfo) == 0)
       {
           if (fileInfo.fattrib & AM_DIR )
                   chp->printf("<DIR>\t\t");
           else
                   chp->printf("%ld\t\t", fileInfo.fsize);
       }
       chp->printf("%s\r\n", dirp->d_name);
   }
   closedir(dp);
}

Diff: FATFileSystem/FATFileHandle.cpp

Revision:
0:572d27f56fcd
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FATFileSystem/FATFileHandle.cpp	Tue Apr 28 16:55:30 2015 +0000
@@ -0,0 +1,90 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "ff.h"
+#include "ffconf.h"
+#include "mbed_debug.h"
+
+#include "FATFileHandle.h"
+
+FATFileHandle::FATFileHandle(FIL fh) {
+    _fh = fh;
+}
+
+int FATFileHandle::close() {
+    int retval = f_close(&_fh);
+    delete this;
+    return retval;
+}
+
+ssize_t FATFileHandle::write(const void* buffer, size_t length) {
+    UINT n;
+    FRESULT res = f_write(&_fh, buffer, length, &n);
+    if (res) { 
+        debug_if(FFS_DBG, "f_write() failed: %d", res);
+        return -1;
+    }
+    return n;
+}
+        
+ssize_t FATFileHandle::read(void* buffer, size_t length) {
+    debug_if(FFS_DBG, "read(%d)\n", length);
+    UINT n;
+    FRESULT res = f_read(&_fh, buffer, length, &n);
+    if (res) {
+        debug_if(FFS_DBG, "f_read() failed: %d\n", res);
+        return -1;
+    }
+    return n;
+}
+
+int FATFileHandle::isatty() {
+    return 0;
+}
+
+off_t FATFileHandle::lseek(off_t position, int whence) {
+    if (whence == SEEK_END) {
+        position += _fh.fsize;
+    } else if(whence==SEEK_CUR) {
+        position += _fh.fptr;
+    }
+    FRESULT res = f_lseek(&_fh, position);
+    if (res) {
+        debug_if(FFS_DBG, "lseek failed: %d\n", res);
+        return -1;
+    } else {
+        debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
+        return _fh.fptr;
+    }
+}
+
+int FATFileHandle::fsync() {
+    FRESULT res = f_sync(&_fh);
+    if (res) {
+        debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
+        return -1;
+    }
+    return 0;
+}
+
+off_t FATFileHandle::flen() {
+    return _fh.fsize;
+}