Add USB serial/storage examples

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2561 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 126 insertions, 0 deletions

diff --git a/nuttx/configs/ea3131/src/up_usbstrg.c b/nuttx/configs/ea3131/src/up_usbstrg.c
new file mode 100755
index 000000000..5aef28733
--- /dev/null
+++ b/nuttx/configs/ea3131/src/up_usbstrg.c
@@ -0,0 +1,126 @@
+/****************************************************************************
+ * configs/ea3131/src/up_usbstrg.c
+ *
+ *   Copyright (C) 2010 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Configure and register the SAM3U MMC/SD SDIO block driver.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <debug.h>
+#include <errno.h>
+#include <stdlib.h>
+
+#include <nuttx/fs.h>
+#include <nuttx/mkfatfs.h>
+#include <nuttx/ramdisk.h>
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/* Configuration ************************************************************/
+
+#ifndef CONFIG_EXAMPLES_USBSTRG_DEVMINOR1
+#  define CONFIG_EXAMPLES_USBSTRG_DEVMINOR1 0
+#endif
+
+#ifndef CONFIG_EXAMPLES_USBSTRG_DEVPATH1
+#  define CONFIG_EXAMPLES_USBSTRG_DEVPATH1  "/dev/ram"
+#endif
+
+static const char g_source[] = CONFIG_EXAMPLES_USBSTRG_DEVPATH1;
+static struct fat_format_s g_fmt = FAT_FORMAT_INITIALIZER;
+
+#define USBSTRG_NSECTORS        64
+#define USBSTRG_SECTORSIZE      512
+#define BUFFER_SIZE             (USBSTRG_NSECTORS*USBSTRG_SECTORSIZE)
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: usbstrg_archinitialize
+ *
+ * Description:
+ *   Perform architecture specific initialization
+ *
+ ****************************************************************************/
+
+int usbstrg_archinitialize(void)
+{
+  uint8_t *pbuffer;
+  int ret;
+
+  pbuffer = (uint8_t *) malloc (BUFFER_SIZE);
+  if (!pbuffer)
+    {
+      lib_lowprintf ("usbstrg_archinitialize: Failed to allocate ramdisk of size %d\n",
+                     BUFFER_SIZE);
+      return -ENOMEM;
+    }
+
+  /* Register a RAMDISK device to manage this RAM image */
+  
+  ret = ramdisk_register(CONFIG_EXAMPLES_USBSTRG_DEVMINOR1,
+                         pbuffer,
+                         USBSTRG_NSECTORS,
+                         USBSTRG_SECTORSIZE,
+                         true);
+  if (ret < 0)
+    {
+      printf("create_ramdisk: Failed to register ramdisk at %s: %d\n",
+             g_source, -ret);
+      free(pbuffer);
+      return ret;
+    }
+
+  /* Create a FAT filesystem on the ramdisk */
+
+  ret = mkfatfs(g_source, &g_fmt);
+  if (ret < 0)
+    {
+      printf("create_ramdisk: Failed to create FAT filesystem on ramdisk at %s\n",
+             g_source);
+      /* free(pbuffer); -- RAM disk is registered */
+      return ret;
+    }
+
+  return 0;
+}