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RIOT/examples/ipc_pingpong/main.c 1.42 KB
a752c7ab   elopes   add first test an...
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  /*
   * Copyright (C) 2014 Freie Universitรคt Berlin
   *
   * This file is subject to the terms and conditions of the GNU Lesser
   * General Public License v2.1. See the file LICENSE in the top level
   * directory for more details.
   */
  
  /**
   * @ingroup     examples
   * @{
   *
   * @file
   * @brief       IPC pingpong application
   *
   * @author      Kaspar Schleiser <kaspar@schleiser.de>
   * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
   *
   * @}
   */
  
  #include <stdio.h>
  
  #include "thread.h"
  #include "msg.h"
  
  void *second_thread(void *arg)
  {
      (void) arg;
  
      printf("2nd thread started, pid: %" PRIkernel_pid "\n", thread_getpid());
      msg_t m;
  
      while (1) {
          msg_receive(&m);
          printf("2nd: Got msg from %" PRIkernel_pid "\n", m.sender_pid);
          m.content.value++;
          msg_reply(&m, &m);
      }
  
      return NULL;
  }
  
  char second_thread_stack[THREAD_STACKSIZE_MAIN];
  
  int main(void)
  {
      printf("Starting IPC Ping-pong example...\n");
      printf("1st thread started, pid: %" PRIkernel_pid "\n", thread_getpid());
  
      msg_t m;
  
      kernel_pid_t pid = thread_create(second_thread_stack, sizeof(second_thread_stack),
                              THREAD_PRIORITY_MAIN - 1, THREAD_CREATE_STACKTEST,
                              second_thread, NULL, "pong");
  
      m.content.value = 1;
  
      while (1) {
          msg_send_receive(&m, &m, pid);
          printf("1st: Got msg with content %u\n", (unsigned int)m.content.value);
      }
  }