Contiki-NG
button-sensor.c
1 /*
2  * Copyright (c) 2006, 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  */
30 
31 #include "lib/sensors.h"
32 #include "dev/button-sensor.h"
33 #include "lib/simEnvChange.h"
34 
35 const struct simInterface button_interface;
36 const struct sensors_sensor button_sensor;
37 static struct timer debouncetimer;
38 
39 // COOJA variables
40 char simButtonChanged;
41 char simButtonIsDown;
42 char simButtonIsActive;
43 /*---------------------------------------------------------------------------*/
44 static int
45 value(int type)
46 {
47  return simButtonIsDown || !timer_expired(&debouncetimer);
48 }
49 /*---------------------------------------------------------------------------*/
50 static int
51 configure(int type, int c)
52 {
53  if(type == SENSORS_ACTIVE) {
54  simButtonIsActive = c;
55  return 1;
56  } else if(type == SENSORS_HW_INIT) {
57  simButtonIsActive = 1;
58  timer_set(&debouncetimer, 0);
59  return 1;
60  }
61  return 0;
62 }
63 /*---------------------------------------------------------------------------*/
64 static int
65 status(int type)
66 {
67  return (type == SENSORS_ACTIVE) ? simButtonIsActive : 0;
68 }
69 /*---------------------------------------------------------------------------*/
70 static void
71 doInterfaceActionsBeforeTick(void)
72 {
73  // Check if button value has changed
74  if(simButtonChanged && simButtonIsActive && simButtonIsDown) {
75  if(timer_expired(&debouncetimer)) {
76  timer_set(&debouncetimer, CLOCK_SECOND / 10);
77  sensors_changed(&button_sensor);
78  }
79  }
80  simButtonChanged = 0;
81 }
82 /*---------------------------------------------------------------------------*/
83 static void
84 doInterfaceActionsAfterTick(void)
85 {
86 }
87 /*---------------------------------------------------------------------------*/
88 
89 SIM_INTERFACE(button_interface,
90  doInterfaceActionsBeforeTick,
91  doInterfaceActionsAfterTick);
92 
93 SENSORS_SENSOR(button_sensor, BUTTON_SENSOR,
94  value, configure, status);
SENSORS & button_sensor
Exports global symbols for the sensor API.
Definition: z1-sensors.c:46
void timer_set(struct timer *t, clock_time_t interval)
Set a timer.
Definition: timer.c:64
static int value(int type, nrf_drv_gpiote_pin_t pin)
Return current state of a button.
A timer.
Definition: timer.h:82
#define CLOCK_SECOND
A second, measured in system clock time.
Definition: clock.h:82
int timer_expired(struct timer *t)
Check if a timer has expired.
Definition: timer.c:123
static int status(int type, nrf_drv_gpiote_pin_t pin)
Get status of a given button.