main.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2013-2014 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #include "mbed.h"
00018 #include "greentea-client/test_env.h"
00019 
00020 class DevNull : public Stream {
00021 public:
00022     DevNull(const char *name = NULL) : Stream(name) {}
00023 
00024 protected:
00025     virtual int _getc() {
00026         return 0;
00027     }
00028     virtual int _putc(int c) {
00029         return c;
00030     }
00031 };
00032 
00033 DevNull null("null");
00034 
00035 int main() {
00036     GREENTEA_SETUP(2, "dev_null_auto");
00037 
00038     printf("MBED: before re-routing stdout to /null\n");   // This shouldn't appear
00039     greentea_send_kv("to_stdout", "re-routing stdout to /null");
00040 
00041     if (freopen("/null", "w", stdout)) {
00042         // This shouldn't appear on serial
00043         // We should use pure printf here to send KV
00044         printf("{{to_null;printf redirected to /null}}\n");
00045         printf("MBED: this printf is already redirected to /null\n");
00046     }
00047 
00048     while(1) {
00049       // Success is determined by the host test at this point, so busy wait
00050     }
00051 }