Contiki-NG
als-sensor.c
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1 /*
2  * Copyright (c) 2018, Texas Instruments Incorporated - http://www.ti.com/
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  * \addtogroup srf06-peripherals
32  * @{
33  *
34  * \file
35  * Driver for the SmartRF06 EB ALS sensor.
36  * \author
37  * Edvard Pettersen <e.pettersen@ti.com>
38  */
39 /*---------------------------------------------------------------------------*/
40 #include "contiki.h"
41 #include "dev/gpio-hal.h"
42 #include "lib/sensors.h"
43 #include "sys/timer.h"
44 
45 #include "als-sensor.h"
46 /*---------------------------------------------------------------------------*/
47 #include <Board.h>
48 
49 #include <ti/drivers/ADC.h>
50 /*---------------------------------------------------------------------------*/
51 #include <stdint.h>
52 /*---------------------------------------------------------------------------*/
53 static ADC_Handle adc_handle;
54 /*---------------------------------------------------------------------------*/
55 static int
56 init(void)
57 {
58  ADC_Params adc_params;
59  ADC_Params_init(&adc_params);
60 
61  adc_handle = ADC_open(Board_ADCALS, &adc_params);
62  if(adc_handle == NULL) {
63  return 0;
64  }
65 
66  return 1;
67 }
68 /*---------------------------------------------------------------------------*/
69 static int
70 config(int type, int enable)
71 {
72  switch(type) {
73  case SENSORS_HW_INIT:
74  return init();
75 
76  case SENSORS_ACTIVE:
77  PINCC26XX_setOutputEnable(Board_ALS_PWR, true);
78  PINCC26XX_setOutputEnable(Board_ALS_OUT, false);
79 
80  if(enable) {
81  PINCC26XX_setOutputValue(Board_ALS_PWR, 1);
82  clock_delay_usec(2000);
83  } else {
84  PINCC26XX_setOutputValue(Board_ALS_PWR, 0);
85  }
86  break;
87 
88  default:
89  break;
90  }
91  return 1;
92 }
93 /*---------------------------------------------------------------------------*/
94 static int
95 value(int type)
96 {
97 
98  uint16_t adc_value = 0;
99  int_fast16_t res = ADC_convert(adc_handle, &adc_value);
100  if(res != ADC_STATUS_SUCCESS) {
101  return -1;
102  }
103 
104  return (int)adc_value;
105 }
106 /*---------------------------------------------------------------------------*/
107 static int
108 status(int type)
109 {
110  return 1;
111 }
112 /*---------------------------------------------------------------------------*/
113 SENSORS_SENSOR(als_sensor, ALS_SENSOR, value, config, status);
114 /*---------------------------------------------------------------------------*/
115 /** @} */
void clock_delay_usec(uint16_t dt)
Delay a given number of microseconds.
Definition: clock.c:150
Timer library header file.
static int config(int type, int c, nrf_drv_gpiote_pin_t pin)
Configuration function for the button sensor for all buttons.
Header file for the GPIO HAL.
const struct sensors_sensor als_sensor
Exports a global symbol to be used by the sensor API.