Contiki-NG
cc2538-temp-sensor.c
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1 /*
2  * Copyright (c) 2015, Zolertia - http://www.zolertia.com
3  * Copyright (c) 2015, University of Bristol - http://www.bristol.ac.uk
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  * notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  * notice, this list of conditions and the following disclaimer in the
13  * documentation and/or other materials provided with the distribution.
14  *
15  * 3. Neither the name of the copyright holder nor the names of its
16  * contributors may be used to endorse or promote products derived
17  * from this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
23  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
25  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
26  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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28  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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31  */
32 /*---------------------------------------------------------------------------*/
33 /**
34  * \addtogroup cc2538-temp-sensor
35  * @{
36  *
37  * \file
38  * Driver for the CC2538 On-Chip temperature sensor
39  */
40 /*---------------------------------------------------------------------------*/
41 #include "contiki.h"
42 #include "lib/sensors.h"
43 #include "dev/adc.h"
44 #include "dev/cc2538-sensors.h"
45 
46 #include <stdint.h>
47 /*---------------------------------------------------------------------------*/
48 static int
49 value(int type)
50 {
53 
54  if(type == CC2538_SENSORS_VALUE_TYPE_RAW) {
55  return raw;
56  } else if(type == CC2538_SENSORS_VALUE_TYPE_CONVERTED) {
57  return 25000 + ((raw >> 4) - 1422) * 10000 / 42;
58  }
59 
60  return CC2538_SENSORS_ERROR;
61 }
62 /*---------------------------------------------------------------------------*/
63 static int
64 configure(int type, int value)
65 {
66  return 0;
67 }
68 /*---------------------------------------------------------------------------*/
69 static int
70 status(int type)
71 {
72  return 1;
73 }
74 /*---------------------------------------------------------------------------*/
75 SENSORS_SENSOR(cc2538_temp_sensor, TEMP_SENSOR, value, configure, status);
76 /*---------------------------------------------------------------------------*/
77 /** @} */
#define CC2538_SENSORS_VALUE_TYPE_CONVERTED
Request the converted reading.
#define SOC_ADC_ADCCON_DIV_512
512 decimation rate (12 bits ENOB)
Definition: soc-adc.h:96
#define CC2538_SENSORS_ERROR
Generic Error.
Generic header usable by all CC2538 sensor drivers.
#define CC2538_SENSORS_VALUE_TYPE_RAW
Request the raw reading.
Header file for the cc2538 ADC driver.
const struct sensors_sensor cc2538_temp_sensor
Exports a global symbol to be used by the sensor API.
#define SOC_ADC_ADCCON_REF_INT
Internal reference.
Definition: soc-adc.h:89
#define SOC_ADC_ADCCON_CH_TEMP
Temperature sensor.
Definition: soc-adc.h:110
int16_t adc_get(uint8_t channel, uint8_t ref, uint8_t div)
Performs a single conversion on a given ADC channel.
Definition: adc.c:57