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nRF51822/nordic/nrf-sdk/nrf_temp.h@0:76dfa9657d9d, 2014-11-12 (annotated)

Committer:
jksoft
Date:
Wed Nov 12 02:40:34 2014 +0000
Revision:
0:76dfa9657d9d
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Who changed what in which revision?

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jksoft 0:76dfa9657d9d 1 /* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved.
jksoft 0:76dfa9657d9d 2 *
jksoft 0:76dfa9657d9d 3 * The information contained herein is property of Nordic Semiconductor ASA.
jksoft 0:76dfa9657d9d 4 * Terms and conditions of usage are described in detail in NORDIC
jksoft 0:76dfa9657d9d 5 * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
jksoft 0:76dfa9657d9d 6 *
jksoft 0:76dfa9657d9d 7 * Licensees are granted free, non-transferable use of the information. NO
jksoft 0:76dfa9657d9d 8 * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
jksoft 0:76dfa9657d9d 9 * the file.
jksoft 0:76dfa9657d9d 10 *
jksoft 0:76dfa9657d9d 11 */
jksoft 0:76dfa9657d9d 12
jksoft 0:76dfa9657d9d 13 #ifndef NRF_TEMP_H__
jksoft 0:76dfa9657d9d 14 #define NRF_TEMP_H__
jksoft 0:76dfa9657d9d 15
jksoft 0:76dfa9657d9d 16 #include "nrf51.h"
jksoft 0:76dfa9657d9d 17
jksoft 0:76dfa9657d9d 18 /**
jksoft 0:76dfa9657d9d 19 * @defgroup nrf_temperature TEMP (temperature) abstraction
jksoft 0:76dfa9657d9d 20 * @{
jksoft 0:76dfa9657d9d 21 * @ingroup nrf_drivers temperature_example
jksoft 0:76dfa9657d9d 22 * @brief Temperature module init and read functions.
jksoft 0:76dfa9657d9d 23 *
jksoft 0:76dfa9657d9d 24 */
jksoft 0:76dfa9657d9d 25
jksoft 0:76dfa9657d9d 26
jksoft 0:76dfa9657d9d 27
jksoft 0:76dfa9657d9d 28 /**
jksoft 0:76dfa9657d9d 29 * @brief Function for preparing the temp module for temperature measurement.
jksoft 0:76dfa9657d9d 30 *
jksoft 0:76dfa9657d9d 31 * This function initializes the TEMP module and writes to the hidden configuration register.
jksoft 0:76dfa9657d9d 32 *
jksoft 0:76dfa9657d9d 33 * @param none
jksoft 0:76dfa9657d9d 34 */
jksoft 0:76dfa9657d9d 35 static __INLINE void nrf_temp_init(void)
jksoft 0:76dfa9657d9d 36 {
jksoft 0:76dfa9657d9d 37 /**@note Workaround for PAN_028 rev2.0A anomaly 31 - TEMP: Temperature offset value has to be manually loaded to the TEMP module */
jksoft 0:76dfa9657d9d 38 *(uint32_t *) 0x4000C504 = 0;
jksoft 0:76dfa9657d9d 39 }
jksoft 0:76dfa9657d9d 40
jksoft 0:76dfa9657d9d 41
jksoft 0:76dfa9657d9d 42
jksoft 0:76dfa9657d9d 43 #define MASK_SIGN (0x00000200UL)
jksoft 0:76dfa9657d9d 44 #define MASK_SIGN_EXTENSION (0xFFFFFC00UL)
jksoft 0:76dfa9657d9d 45
jksoft 0:76dfa9657d9d 46 /**
jksoft 0:76dfa9657d9d 47 * @brief Function for reading temperature measurement.
jksoft 0:76dfa9657d9d 48 *
jksoft 0:76dfa9657d9d 49 * The function reads the 10 bit 2's complement value and transforms it to a 32 bit 2's complement value.
jksoft 0:76dfa9657d9d 50 *
jksoft 0:76dfa9657d9d 51 * @param none
jksoft 0:76dfa9657d9d 52 */
jksoft 0:76dfa9657d9d 53 static __INLINE int32_t nrf_temp_read(void)
jksoft 0:76dfa9657d9d 54 {
jksoft 0:76dfa9657d9d 55 /**@note Workaround for PAN_028 rev2.0A anomaly 28 - TEMP: Negative measured values are not represented correctly */
jksoft 0:76dfa9657d9d 56 return ((NRF_TEMP->TEMP & MASK_SIGN) != 0) ? (NRF_TEMP->TEMP | MASK_SIGN_EXTENSION) : (NRF_TEMP->TEMP);
jksoft 0:76dfa9657d9d 57 }
jksoft 0:76dfa9657d9d 58
jksoft 0:76dfa9657d9d 59 /** @} */
jksoft 0:76dfa9657d9d 60
jksoft 0:76dfa9657d9d 61 #endif