1 /*
2 * Copyright (c) 2012 - 2018, Nordic Semiconductor ASA
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 are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
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 from this
17 * software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef NRF_TEMP_H__
33 #define NRF_TEMP_H__
34
35 #include <nrfx.h>
36
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
40
41 /**
42 * @defgroup nrf_temp_hal TEMP HAL
43 * @{
44 * @ingroup nrf_temp temperature_example
45 * @brief Temperature module init and read functions.
46 */
47
48 #define MASK_SIGN (0x00000200UL)
49 #define MASK_SIGN_EXTENSION (0xFFFFFC00UL)
50
51 /**
52 * @brief Function for preparing the temp module for temperature measurement.
53 *
54 * This function initializes the TEMP module and writes to the hidden configuration register.
55 */
nrf_temp_init(void)56 static __INLINE void nrf_temp_init(void)
57 {
58 /**@note Workaround for PAN_028 rev2.0A anomaly 31 - TEMP: Temperature offset value has to be manually loaded to the TEMP module */
59 *(uint32_t *) 0x4000C504 = 0;
60 }
61
62 /**
63 * @brief Function for reading temperature measurement.
64 *
65 * The function reads the 10 bit 2's complement value and transforms it to a 32 bit 2's complement value.
66 */
nrf_temp_read(void)67 static __INLINE int32_t nrf_temp_read(void)
68 {
69 /**@note Workaround for PAN_028 rev2.0A anomaly 28 - TEMP: Negative measured values are not represented correctly */
70 return ((NRF_TEMP->TEMP & MASK_SIGN) != 0) ? (int32_t)(NRF_TEMP->TEMP | MASK_SIGN_EXTENSION) : (NRF_TEMP->TEMP);
71 }
72
73 /** @} */
74
75 #ifdef __cplusplus
76 }
77 #endif
78
79 #endif
80