apps/shell/shell-blink.c

   1 /*
   2  * Copyright (c) 2008, Swedish Institute of Computer Science.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the Institute nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * This file is part of the Contiki operating system.
  30  *
  31  * $Id: shell-blink.c,v 1.1 2008/02/04 23:42:17 adamdunkels Exp $
  32  */
  33
  34 /**
  35  * \file
  36  *         A brief description of what this file is.
  37  * \author
  38  *         Adam Dunkels <adam@sics.se>
  39  */
  40
  41 #include "contiki.h"
  42 #include "shell.h"
  43
  44 #include "dev/leds.h"
  45
  46 #include <stdio.h>
  47
  48 /*---------------------------------------------------------------------------*/
  49 PROCESS(shell_blink_process, "blink");
  50 SHELL_COMMAND(blink_command,
  51               "blink",
  52               "blink [num]: blink LEDs ([num] times)",
  53               &shell_blink_process);
  54 /*---------------------------------------------------------------------------*/
  55 PROCESS_THREAD(shell_blink_process, ev, data)
  56 {
  57   static struct etimer etimer;
  58   static int i, num, on = 0;
  59   const char *nextptr;
  60
  61   PROCESS_EXITHANDLER(if(on) { leds_toggle(LEDS_ALL); } );
  62
  63   PROCESS_BEGIN();
  64
  65   if(data != NULL) {
  66     num = shell_strtolong(data, &nextptr);
  67     if(nextptr != data) {
  68       etimer_set(&etimer, CLOCK_SECOND / 2);
  69       for(i = 0; i < num; ++i) {
  70         leds_toggle(LEDS_ALL);
  71         on = 1;
  72         PROCESS_WAIT_UNTIL(etimer_expired(&etimer));
  73         etimer_reset(&etimer);
  74
  75         leds_toggle(LEDS_ALL);
  76         on = 0;
  77         PROCESS_WAIT_UNTIL(etimer_expired(&etimer));
  78         etimer_reset(&etimer);
  79       }
  80       PROCESS_EXIT();
  81     }
  82   }
  83
  84   while(1) {
  85     struct shell_input *input;
  86     PROCESS_WAIT_EVENT();
  87     if(ev == PROCESS_EVENT_TIMER && data == &etimer) {
  88       if(on) {
  89         leds_toggle(LEDS_ALL);
  90         on = 0;
  91       }
  92     } else if(ev == shell_event_input) {
  93       input = data;
  94       if(input->len1 + input->len2 == 0) {
  95         if(on) {
  96           leds_toggle(LEDS_ALL);
  97           on = 0;
  98         }
  99         PROCESS_EXIT();
 100       }
 101       shell_output(&blink_command,
 102                    input->data1, input->len1,
 103                    input->data2, input->len2);
 104
 105       if(on == 0) {
 106         leds_toggle(LEDS_ALL);
 107         on = 1;
 108       }
 109       etimer_set(&etimer, CLOCK_SECOND / 16);
 110     }
 111   }
 112
 113
 114   PROCESS_END();
 115 }
 116 /*---------------------------------------------------------------------------*/
 117 void
 118 shell_blink_init(void)
 119 {
 120   shell_register_command(&blink_command);
 121 }
 122 /*---------------------------------------------------------------------------*/