Beginning of apps/system/usbmonitor (incomplete); more LM4F changes from JP

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5577 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 162 insertions, 0 deletions

diff --git a/apps/system/usbmonitor/usbmonitor.c b/apps/system/usbmonitor/usbmonitor.c
new file mode 100644
index 000000000..b101b128c
--- /dev/null
+++ b/apps/system/usbmonitor/usbmonitor.c
@@ -0,0 +1,162 @@
+/****************************************************************************
+ * apps/system/free/free.c
+ *
+ *   Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 <nuttx/progmem.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+/****************************************************************************
+ * Private Typs
+ ****************************************************************************/
+
+struct usbmon_state_s
+{
+#ifdef CONFIG_NSH_BUILTIN_APPS
+  volatile bool started;
+  volatile bool stop;
+  pid_t pid;
+#endif
+};
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static struct usbmon_state_s g_usbmonitor;
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static int usbmonitor_daemon(int argc, char **argv)
+{
+#ifdef CONFIG_NSH_BUILTIN_APPS
+  print("USB Monitor running: %d\n", g_usbmonitor.pid);
+#endif
+
+#ifdef CONFIG_NSH_BUILTIN_APPS
+  /* If we are running as an NSH command, then loop until we detect that
+   * there is a request to stop.
+   */
+
+  while (!g_usbmonitor.stop)
+#else
+  /* If we are running as a standalone program, then loop forever */
+
+  for (;;)
+#endif
+    {
+#warning "Missing logic"
+    }
+
+  /* Stopped */
+
+#ifdef CONFIG_NSH_BUILTIN_APPS
+  g_usbmonitor.stop    = false;
+  g_usbmonitor.started = false;
+  print("USB Monitor stopped: %d\n", g_usbmonitor.pid);
+#endif
+  return 0;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+int usbmonitor_main(int argc, char **argv)
+{
+#ifdef CONFIG_NSH_BUILTIN_APPS
+  /* Has the monitor already started? */
+
+  sched_lock();
+  if (!g_usbmonitor.started)
+    {
+      int ret;
+
+      /* No.. start it now */
+ 
+      g_usbmonitor.started = true;
+      g_usbmonitor.stop    = false;
+
+      ret = TASK_CREATE("USB Monitor", CONFIG_SYSTEM_USBMONITOR_PRIORITY,
+                        CONFIG_SYSTEM_USBMONITOR_STACKSIZE,
+                        (main_t)usbmonitor_daemon, (const char **)NULL);
+      if (ret < 0)
+        {
+          int errcode = errno;
+          fprintf(stderr, "ERROR: Failed to start the USB monitor: %d\n",
+                  errcode);
+        }
+      else
+        {
+          g_usbmonitor.pid = ret;
+          print("USB Monitor started: %d\n", g_usbmonitor.pid);
+        }
+
+      sched_unlock();
+      return 0;
+    }
+
+  sched_unlock();
+  print("USB Monitor running: %d\n", g_usbmonitor.pid);
+  return 0;
+#else
+  return usbmonitor_daemon(argc, argv);
+#endif
+}
+
+#ifdef CONFIG_NSH_BUILTIN_APPS
+int usbmonitor_stop(int argc, char **argv)
+{
+  /* Has the monitor already started? */
+
+  if (g_usbmonitor.started)
+    {
+      print("USB Monitor stopping: %d\n", g_usbmonitor.pid);
+      g_usbmonitor.stop = true;
+      return 0;
+    }
+
+  print("USB Monitor stopped: %d\n", g_usbmonitor.pid);
+  return 0;
+}
+#endif
+