shell: add sample application

[QEMU] CPU: qemu32
shell> ping
pong
shell> ticks
ticks: 481
shell> highticks
highticks: 750736288
shell> help
Available commands:
help
ping
ticks
highticks

Change-Id: Ie8e9d27d83bf944a8b8800f7391c6246be769875
Signed-off-by: Anas Nashif <anas.nashif@intel.com>

samples/nanokernel/apps/shell/Makefile

@@ -0,0 +1,5 @@
+KERNEL_TYPE = nano
+PLATFORM_CONFIG = basic_atom
+CONF_FILE = prj.conf
+
+include $(ZEPHYR_BASE)/Makefile.inc

samples/nanokernel/apps/shell/prj.conf

@@ -0,0 +1,3 @@
+CONFIG_CONSOLE_HANDLER=y
+CONFIG_CONSOLE_HANDLER_SHELL=y
+CONFIG_PRINTK=y

samples/nanokernel/apps/shell/src/Makefile

@@ -0,0 +1 @@
+obj-y += main.o

samples/nanokernel/apps/shell/src/main.c

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2015 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <zephyr.h>
+#include <misc/printk.h>
+#include <misc/shell.h>
+#define DEVICE_NAME "test shell"
+
+static void shell_cmd_ping(int argc, char *argv[])
+{
+	printk("pong\n");
+}
+
+static void shell_cmd_ticks(int argc, char *argv[])
+{
+	printk("ticks: %d\n", sys_tick_get_32());
+}
+
+static void shell_cmd_highticks(int argc, char *argv[])
+{
+	printk("highticks: %d\n", sys_cycle_get_32());
+}
+
+
+struct shell_cmd commands[] = {
+	{ "ping", shell_cmd_ping },
+	{ "ticks", shell_cmd_ticks },
+	{ "highticks", shell_cmd_highticks },
+	{ NULL, NULL }
+};
+
+void main(void)
+{
+	shell_init("shell> ", commands);
+}