Add FAT SL code and demo project.

FreeRTOS-Plus/Source/FreeRTOS-Plus-FAT-SL/media-drv/ram/ramdrv_f.c

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+/*
+ * FreeRTOS+FAT FS V1.0.0 (C) 2013 HCC Embedded
+ *
+ * The FreeRTOS+FAT SL license terms are different to the FreeRTOS license 
+ * terms.
+ * 
+ * FreeRTOS+FAT SL uses a dual license model that allows the software to be used
+ * under a pure GPL open source license (as opposed to the modified GPL licence
+ * under which FreeRTOS is distributed) or a commercial license.  Details of 
+ * both license options follow:
+ * 
+ * - Open source licensing -
+ * FreeRTOS+FAT SL is a free download and may be used, modified, evaluated and
+ * distributed without charge provided the user adheres to version two of the 
+ * GNU General Public License (GPL) and does not remove the copyright notice or 
+ * this text.  The GPL V2 text is available on the gnu.org web site, and on the
+ * following URL: http://www.FreeRTOS.org/gpl-2.0.txt.
+ * 
+ * - Commercial licensing -
+ * Businesses and individuals who for commercial or other reasons cannot comply
+ * with the terms of the GPL V2 license must obtain a commercial license before 
+ * incorporating FreeRTOS+FAT SL into proprietary software for distribution in 
+ * any form.  Commercial licenses can be purchased from 
+ * http://shop.freertos.org/fat_sl and do not require any source files to be 
+ * changed.
+ *
+ * FreeRTOS+FAT SL is distributed in the hope that it will be useful.  You
+ * cannot use FreeRTOS+FAT SL unless you agree that you use the software 'as
+ * is'.  FreeRTOS+FAT SL is provided WITHOUT ANY WARRANTY; without even the
+ * implied warranties of NON-INFRINGEMENT, MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. Real Time Engineers Ltd. and HCC Embedded disclaims all
+ * conditions and terms, be they implied, expressed, or statutory.
+ *
+ * http://www.FreeRTOS.org
+ * http://www.FreeRTOS.org/FreeRTOS-Plus
+ *
+ */
+
+#include "../../api/api_mdriver_ram.h"
+#include "config_mdriver_ram.h"
+#include "../../psp/include/psp_string.h"
+
+#include "../../version/ver_mdriver_ram.h"
+#if VER_MDRIVER_RAM_MAJOR != 1 || VER_MDRIVER_RAM_MINOR != 2
+ #error Incompatible MDRIVER_RAM version number!
+#endif
+
+
+char  ramdrv0[MDRIVER_RAM_VOLUME0_SIZE];
+
+typedef struct
+{
+  char         * ramdrv;
+  unsigned long  maxsector;
+  int            use;
+  F_DRIVER     * driver;
+} t_RamDrv;
+
+static F_DRIVER  t_drivers[1];
+
+static t_RamDrv  RamDrv[1] =
+{
+  { ramdrv0, ( MDRIVER_RAM_VOLUME0_SIZE / MDRIVER_RAM_SECTOR_SIZE ), 0, &t_drivers[0] }
+};
+
+
+/****************************************************************************
+ * Read one sector
+ ***************************************************************************/
+static int ram_readsector ( F_DRIVER * driver, void * data, unsigned long sector )
+{
+  long       len;
+  char     * d = (char *)data;
+  char     * s;
+  t_RamDrv * p = (t_RamDrv *)( driver->user_ptr );
+
+  if ( sector >= p->maxsector )
+  {
+    return MDRIVER_RAM_ERR_SECTOR;
+  }
+
+  s = p->ramdrv;
+  s += sector * MDRIVER_RAM_SECTOR_SIZE;
+  len = MDRIVER_RAM_SECTOR_SIZE;
+
+#if MDRIVER_MEM_LONG_ACCESS
+  if ( ( !( len & 3 ) ) && ( !( ( (long)d ) & 3 ) ) && ( !( ( (long)s ) & 3 ) ) )
+  {
+    long * dd = (long *)d;
+    long * ss = (long *)s;
+    len >>= 2;
+    while ( len-- )
+    {
+      *dd++ = *ss++;
+    }
+
+    return MDRIVER_RAM_NO_ERROR;
+  }
+
+#endif /* if MDRIVER_MEM_LONG_ACCESS */
+
+  while ( len-- )
+  {
+    *d++ = *s++;
+  }
+
+  return MDRIVER_RAM_NO_ERROR;
+}
+
+/****************************************************************************
+ * Write one sector
+ ***************************************************************************/
+static int ram_writesector ( F_DRIVER * driver, void * data, unsigned long sector )
+{
+  long       len;
+  char     * s = (char *)data;
+  char     * d;
+  t_RamDrv * p = (t_RamDrv *)( driver->user_ptr );
+
+  if ( sector >= p->maxsector )
+  {
+    return MDRIVER_RAM_ERR_SECTOR;
+  }
+
+  d = p->ramdrv;
+  d += sector * MDRIVER_RAM_SECTOR_SIZE;
+  len = MDRIVER_RAM_SECTOR_SIZE;
+
+#if MDRIVER_MEM_LONG_ACCESS
+  if ( ( !( len & 3 ) ) && ( !( ( (long)d ) & 3 ) ) && ( !( ( (long)s ) & 3 ) ) )
+  {
+    long * dd = (long *)d;
+    long * ss = (long *)s;
+    len >>= 2;
+    while ( len-- )
+    {
+      *dd++ = *ss++;
+    }
+
+    return MDRIVER_RAM_NO_ERROR;
+  }
+
+#endif /* if MDRIVER_MEM_LONG_ACCESS */
+
+  while ( len-- )
+  {
+    *d++ = *s++;
+  }
+
+  return MDRIVER_RAM_NO_ERROR;
+}
+
+
+/****************************************************************************
+ *
+ * ram_getphy
+ *
+ * determinate ramdrive physicals
+ *
+ * INPUTS
+ *
+ * driver - driver structure
+ * phy - this structure has to be filled with physical information
+ *
+ * RETURNS
+ *
+ * error code or zero if successful
+ *
+ ***************************************************************************/
+static int ram_getphy ( F_DRIVER * driver, F_PHY * phy )
+{
+  t_RamDrv * p = (t_RamDrv *)( driver->user_ptr );
+
+  phy->number_of_sectors = p->maxsector;
+  phy->bytes_per_sector = MDRIVER_RAM_SECTOR_SIZE;
+
+  return MDRIVER_RAM_NO_ERROR;
+}
+
+
+/****************************************************************************
+ *
+ * ram_release
+ *
+ * Releases a drive
+ *
+ * INPUTS
+ *
+ * driver_param - driver parameter
+ *
+ ***************************************************************************/
+static void ram_release ( F_DRIVER * driver )
+{
+  t_RamDrv * p = (t_RamDrv *)( driver->user_ptr );
+
+  if ( p == RamDrv )
+  {
+    p->use = 0;
+  }
+}
+
+
+/****************************************************************************
+ *
+ * ram_initfunc
+ *
+ * this init function has to be passed for highlevel to initiate the
+ * driver functions
+ *
+ * INPUTS
+ *
+ * driver_param - driver parameter
+ *
+ * RETURNS
+ *
+ * driver structure pointer
+ *
+ ***************************************************************************/
+F_DRIVER * ram_initfunc ( unsigned long driver_param )
+{
+  t_RamDrv    * p;
+
+  p = RamDrv + driver_param;
+
+  if ( p != RamDrv )
+  {
+    return 0;
+  }
+
+  if ( p->use )
+  {
+    return 0;
+  }
+
+  (void)psp_memset( p->driver, 0, sizeof( F_DRIVER ) );
+
+  p->driver->readsector = ram_readsector;
+  p->driver->writesector = ram_writesector;
+  p->driver->getphy = ram_getphy;
+  p->driver->release = ram_release;
+  p->driver->user_ptr = p;
+
+  p->use = 1;
+
+  return p->driver;
+} /* ram_initfunc */
+