mirror of https://github.com/ARMmbed/mbed-os.git
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved.
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*
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* The information contained herein is property of Nordic Semiconductor ASA.
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* Terms and conditions of usage are described in detail in NORDIC
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* SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
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*
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* Licensees are granted free, non-transferable use of the information. NO
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* WARRANTY of ANY KIND is provided. This heading must NOT be removed from
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* the file.
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*
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*/
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#ifndef NRF_TEMP_H__
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#define NRF_TEMP_H__
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#include "nordic_global.h"
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#include "nrf51.h"
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/**
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* @defgroup nrf_temperature TEMP (temperature) abstraction
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* @{
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* @ingroup nrf_drivers temperature_example
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* @brief Temperature module init and read functions.
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*
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*/
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/**
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* @brief Function for preparing the temp module for temperature measurement.
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*
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* This function initializes the TEMP module and writes to the hidden configuration register.
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*
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* @param none
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*/
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static __INLINE void nrf_temp_init(void)
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{
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/**@note Workaround for PAN_028 rev2.0A anomaly 31 - TEMP: Temperature offset value has to be manually loaded to the TEMP module */
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*(uint32_t *) 0x4000C504 = 0;
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}
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#define MASK_SIGN (0x00000200UL)
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#define MASK_SIGN_EXTENSION (0xFFFFFC00UL)
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/**
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* @brief Function for reading temperature measurement.
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*
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* The function reads the 10 bit 2's complement value and transforms it to a 32 bit 2's complement value.
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*
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* @param none
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*/
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static __INLINE int32_t nrf_temp_read(void)
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{
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/**@note Workaround for PAN_028 rev2.0A anomaly 28 - TEMP: Negative measured values are not represented correctly */
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return ((NRF_TEMP->TEMP & MASK_SIGN) != 0) ? (NRF_TEMP->TEMP | MASK_SIGN_EXTENSION) : (NRF_TEMP->TEMP);
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}
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/** @} */
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#endif
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