Contiki-NG
relay-phidget.c
1 /*
2  * Copyright (c) 2010, 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  *
32  * -----------------------------------------------------------------
33  *
34  * \file
35  * Device simple driver for generic relay in phidget port of Zolertia Z1
36  * \author
37  * Antonio Lignan, Zolertia <alinan@zolertia.com>
38  *
39  */
40 
41 #include "contiki.h"
42 #include "relay-phidget.h"
43 
44 static uint8_t controlPin;
45 
46 enum PHIDGET_RELAY_STATUSTYPES {
47  /* must be a bit and not more, not using 0x00. */
48  INITED = 0x01,
49  RUNNING = 0x02,
50  STOPPED = 0x04,
51 };
52 
53 static enum PHIDGET_RELAY_STATUSTYPES _RELAY_STATUS = 0x00;
54 
55 /*---------------------------------------------------------------------------*/
56 
57 void
58 relay_enable(uint8_t pin)
59 {
60 
61  if(!(_RELAY_STATUS & INITED)) {
62 
63  _RELAY_STATUS |= INITED;
64 
65  /* Selects the pin to be configure as the control pin of the relay module */
66  controlPin = (1 << pin);
67 
68  /* Configures the control pin */
69  P6SEL &= ~controlPin;
70  P6DIR |= controlPin;
71  }
72 }
73 /*---------------------------------------------------------------------------*/
74 
75 void
76 relay_on()
77 {
78  if((_RELAY_STATUS & INITED)) {
79  P6OUT |= controlPin;
80  }
81 }
82 /*---------------------------------------------------------------------------*/
83 void
84 relay_off()
85 {
86  if((_RELAY_STATUS & INITED)) {
87  P6OUT &= ~controlPin;
88  }
89 }
90 /*---------------------------------------------------------------------------*/
91 
92 int8_t
93 relay_toggle()
94 {
95  if((_RELAY_STATUS & INITED)) {
96  P6OUT ^= controlPin;
97  if((P6OUT & controlPin)) {
98  return 1;
99  }
100  return 0;
101  }
102  return -1;
103 }
104 /*---------------------------------------------------------------------------*/
105