Contiki-NG
adc-sensor.c
Go to the documentation of this file.
1/*
2 * Copyright (c) 2016, University of Bristol - http://www.bristol.ac.uk
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 copyright holder nor the names of its
14 * contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
20 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
21 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
28 * OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30/*---------------------------------------------------------------------------*/
31/**
32 * \addtogroup cc26xx-adc-sensor
33 * @{
34 *
35 * \file
36 * Driver for the CC13xx/CC26xx ADC
37 */
38/*---------------------------------------------------------------------------*/
39#include "contiki.h"
40#include "lib/sensors.h"
41#include "dev/adc-sensor.h"
42#include "sys/timer.h"
43#include "lpm.h"
44
45#include "ti-lib.h"
46#include "driverlib/aux_adc.h"
47#include "aux-ctrl.h"
48
49#include <stdio.h>
50#include <stdbool.h>
51/*---------------------------------------------------------------------------*/
52static uint8_t channel = ADC_COMPB_IN_AUXIO0;
53static bool is_active = false;
54
55static aux_consumer_module_t adc_aux = {
56 .clocks = AUX_WUC_ADI_CLOCK | AUX_WUC_ANAIF_CLOCK | AUX_WUC_SMPH_CLOCK
57};
58/*---------------------------------------------------------------------------*/
59static int
60config(int type, int c)
61{
62 switch(type) {
63 case SENSORS_ACTIVE:
64 is_active = c;
65
66 if(is_active) {
67 /* Request AUX access, with ADI and SMPH clocks */
69
70 ti_lib_aux_adc_select_input(channel);
71 } else {
73 }
74 break;
75
76 case ADC_SENSOR_SET_CHANNEL:
77 channel = c;
78 if(is_active) {
79 ti_lib_aux_adc_select_input(channel);
80 }
81 break;
82
83 default:
84 break;
85 }
86
87 return 1;
88}
89/*---------------------------------------------------------------------------*/
90static int
91status(int type)
92{
93 switch(type) {
94 case SENSORS_ACTIVE:
95 if(is_active) {
96 return 1;
97 }
98 break;
99 default:
100 break;
101 }
102 return 0;
103}
104/*---------------------------------------------------------------------------*/
105static int
106value(int type)
107{
108 if(type == ADC_SENSOR_VALUE) {
109 int val, adj_val, adj_mv;
110
111 if(!is_active) {
112 puts("ADC not active");
113 return 0;
114 }
115
116 ti_lib_aux_adc_enable_sync(AUXADC_REF_FIXED, AUXADC_SAMPLE_TIME_2P7_US,
117 AUXADC_TRIGGER_MANUAL);
118
119 ti_lib_aux_adc_gen_manual_trigger();
120 val = ti_lib_aux_adc_read_fifo();
121 adj_val = ti_lib_aux_adc_adjust_value_for_gain_and_offset(
122 val,
123 ti_lib_aux_adc_get_adjustment_gain(AUXADC_REF_FIXED),
124 ti_lib_aux_adc_get_adjustment_offset(AUXADC_REF_FIXED));
125 adj_mv = ti_lib_aux_adc_value_to_microvolts(AUXADC_FIXED_REF_VOLTAGE_NORMAL, adj_val);
126 ti_lib_aux_adc_disable();
127
128 return adj_mv;
129 }
130
131 return 0;
132}
133/*---------------------------------------------------------------------------*/
134SENSORS_SENSOR(adc_sensor, ADC_SENSOR, value, config, status);
135/*---------------------------------------------------------------------------*/
136/** @} */
Header file for the CC13xx/CC26xx ADC driver.
Header file for the management of the CC13xx/CC26xx AUX domain.
void aux_ctrl_unregister_consumer(aux_consumer_module_t *consumer)
Deregister a module that no longer requires access to the AUX power domain.
Definition: aux-ctrl.c:61
void aux_ctrl_register_consumer(aux_consumer_module_t *consumer)
Register a module that no longer requires access to the AUX power domain.
Definition: aux-ctrl.c:44
The data structure to be used for modules that require access to AUX.
Definition: aux-ctrl.h:62
Header file with macros which rename TI CC26xxware functions.
Timer library header file.