[examples] remove nanopb example codes

examples/nanopb/SConscript

-Import('RTT_ROOT')
-Import('rtconfig')
-from building import *
-
-src	= Split('''
-simple.c
-simple.pb.c
-''')
-CPPPATH = [RTT_ROOT + '/examples/nanopb']
-
-group = DefineGroup('Nanopb_test', src, depend = ['RT_USING_NANOPB'], CPPPATH = CPPPATH)
-
-Return('group')
\ No newline at end of file

examples/nanopb/simple.c

-#include <rthw.h>
-#include <stm32f10x.h>
-#include <pb_encode.h>
-#include <pb_decode.h>
-#include "simple.pb.h"
-
-int nanopb_test()
-{
-    /* This is the buffer where we will store our message. */
-    uint8_t buffer[128];
-    size_t message_length;
-    bool status;
-
-    /* Encode our message */
-    {
-        /* Allocate space on the stack to store the message data.
-         *
-         * Nanopb generates simple struct definitions for all the messages.
-         * - check out the contents of simple.pb.h! */
-        SimpleMessage message = SimpleMessage_init_zero;
-
-        /* Create a stream that will write to our buffer. */
-        pb_ostream_t stream = pb_ostream_from_buffer(buffer, sizeof(buffer));
-
-        /* Fill in the lucky number */
-        message.lucky_number = 13;
-
-        /* Now we are ready to encode the message! */
-        status = pb_encode(&stream, SimpleMessage_fields, &message);
-        message_length = stream.bytes_written;
-
-        /* Then just check for any errors.. */
-        if (!status)
-        {
-            rt_kprintf("Encoding failed: %s\n", PB_GET_ERROR(&stream));
-            return 1;
-        }
-    }
-
-    /* Now we could transmit the message over network, store it in a file or
-     * wrap it to a pigeon's leg.
-     */
-
-    /* But because we are lazy, we will just decode it immediately. */
-
-    {
-        /* Allocate space for the decoded message. */
-        SimpleMessage message;
-
-        /* Create a stream that reads from the buffer. */
-        pb_istream_t stream = pb_istream_from_buffer(buffer, message_length);
-
-        /* Now we are ready to decode the message. */
-        status = pb_decode(&stream, SimpleMessage_fields, &message);
-
-        /* Check for errors... */
-        if (!status)
-        {
-            rt_kprintf("Decoding failed: %s\n", PB_GET_ERROR(&stream));
-            return 1;
-        }
-
-        /* Print the data contained in the message. */
-        rt_kprintf("Your lucky number was %d!\n", message.lucky_number);
-    }
-
-    return 0;
-}
-
-#ifdef RT_USING_FINSH
-#include <finsh.h>
-FINSH_FUNCTION_EXPORT(nanopb_test, nanopb encode/decode test.)
-#endif

examples/nanopb/simple.options

-SimpleMessage.name		max_size:16
\ No newline at end of file

examples/nanopb/simple.pb.c

-/* Automatically generated nanopb constant definitions */
-/* Generated by nanopb-0.3.1 at Tue Mar 10 01:16:15 2015. */
-
-#include "simple.pb.h"
-
-#if PB_PROTO_HEADER_VERSION != 30
-#error Regenerate this file with the current version of nanopb generator.
-#endif
-
-
-
-const pb_field_t SimpleMessage_fields[3] = {
-    PB_FIELD(  1, INT32   , REQUIRED, STATIC  , FIRST, SimpleMessage, lucky_number, lucky_number, 0),
-    PB_FIELD(  2, BYTES   , REQUIRED, STATIC  , OTHER, SimpleMessage, name, lucky_number, 0),
-    PB_LAST_FIELD
-};
-
-

examples/nanopb/simple.pb.h

-/* Automatically generated nanopb header */
-/* Generated by nanopb-0.3.1 at Tue Mar 10 01:16:15 2015. */
-
-#ifndef PB_SIMPLE_PB_H_INCLUDED
-#define PB_SIMPLE_PB_H_INCLUDED
-#include <pb.h>
-
-#if PB_PROTO_HEADER_VERSION != 30
-#error Regenerate this file with the current version of nanopb generator.
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* Enum definitions */
-/* Struct definitions */
-typedef PB_BYTES_ARRAY_T(16) SimpleMessage_name_t;
-
-typedef struct _SimpleMessage {
-    int32_t lucky_number;
-    SimpleMessage_name_t name;
-} SimpleMessage;
-
-/* Default values for struct fields */
-
-/* Initializer values for message structs */
-#define SimpleMessage_init_default               {0, {0, {0}}}
-#define SimpleMessage_init_zero                  {0, {0, {0}}}
-
-/* Field tags (for use in manual encoding/decoding) */
-#define SimpleMessage_lucky_number_tag           1
-#define SimpleMessage_name_tag                   2
-
-/* Struct field encoding specification for nanopb */
-extern const pb_field_t SimpleMessage_fields[3];
-
-/* Maximum encoded size of messages (where known) */
-#define SimpleMessage_size                       29
-
-#ifdef __cplusplus
-} /* extern "C" */
-#endif
-
-#endif

examples/nanopb/simple.proto

-// A very simple protocol definition, consisting of only
-// one message.
-
-message SimpleMessage {
-    required int32 lucky_number = 1;
-	required bytes name = 2;
-}
-
-
-