Contiki 3.x
sky-sensors.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  * Author : Joakim Eriksson
35  * Created : 2010-02-02
36  * Updated : $Date: 2010/02/06 18:28:26 $
37  * $Revision: 1.2 $
38  */
39 
40 #include "contiki.h"
41 
42 static uint8_t adc_on;
43 /*---------------------------------------------------------------------------*/
44 void
45 sky_sensors_activate(uint8_t type)
46 {
47  uint8_t pre = adc_on;
48 
49  adc_on |= type;
50  P6SEL |= type;
51 
52  if(pre == 0 && adc_on > 0) {
53  P6DIR = 0xff;
54  P6OUT = 0x00;
55  /* if nothing was started before, start up the ADC system */
56  /* Set up the ADC. */
57  /* ADC12CTL0 = REF2_5V + SHT0_6 + SHT1_6 + MSC; /\* Setup ADC12, ref., sampling time *\/ */
58  /* ADC12CTL1 = SHP + CONSEQ_3 + CSTARTADD_0; /\* Use sampling timer, repeat-sequenc-of-channels */
59  /* /\* convert up to MEM4 *\/ */
60  /* ADC12MCTL9 |= EOS; */
61 
62  /* ADC12CTL0 |= ADC12ON + REFON; */
63  /* ADC12CTL0 |= ENC; /\* enable conversion *\/ */
64  /* ADC12CTL0 |= ADC12SC; /\* sample & convert *\/ */
65  }
66 }
67 /*---------------------------------------------------------------------------*/
68 void
69 sky_sensors_deactivate(uint8_t type)
70 {
71  adc_on &= ~type;
72 
73  if(adc_on == 0) {
74  /* stop converting immediately, turn off reference voltage, etc. */
75  /* wait for conversion to stop */
76 
77  /* ADC12CTL0 &= ~ENC; */
78  /* /\* need to remove CONSEQ_3 if not EOS is configured *\/ */
79  /* ADC12CTL1 &= ~CONSEQ_3; */
80 
81  /* while(ADC12CTL1 & ADC12BUSY); */
82 
83  /* ADC12CTL0 = 0; */
84  /* ADC12CTL1 = 0; */
85 
86  /* P6DIR = 0x00; */
87  /* P6OUT = 0x00; */
88  /* P6SEL = 0x00; */
89  }
90 }
91 /*---------------------------------------------------------------------------*/
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