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RIOT/sys/shell/commands/sc_random.c 1.32 KB
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  /*
   * Copyright (C) 2013 Freie Universitรคt Berlin
   *               2015 Kaspar Schleiser <kaspar@schleiser.de>
   *
   * 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     sys_shell_commands
   * @{
   *
   * @file
   * @brief       Shell commands for random generators
   *
   * @author      Christian Mehlis <mehlis@inf.fu-berlin.de>
   * @author      Kaspar Schleiser <kaspar@schleiser.de>
   * @}
   */
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <inttypes.h>
  
  #ifdef MODULE_XTIMER
  #include "xtimer.h"
  #endif
  
  #include "random.h"
  
  int _random_init(int argc, char **argv)
  {
      int initval;
  
      if (argc == 1) {
  #ifdef MODULE_XTIMER
          initval = _xtimer_now();
          printf("PRNG initialized to current time: %d\n", initval);
  #else
          (void)initval;
          puts("xtimer module not compiled in, can't initialize by time.\n"
               "Please provide a seed.\n");
          return 1;
  #endif
      }
      else {
          initval = atoi(argv[1]);
          printf("PRNG initialized given value: %d\n", initval);
      }
  
      random_init(initval);
  
      return 0;
  }
  
  int _random_get(int argc, char **argv)
  {
      (void) argc;
      (void) argv;
  
      printf("%" PRIu32 "\n", random_uint32());
  
      return 0;
  }