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nrf_temp.h
00001 /* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved. 00002 * 00003 * The information contained herein is property of Nordic Semiconductor ASA. 00004 * Terms and conditions of usage are described in detail in NORDIC 00005 * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT. 00006 * 00007 * Licensees are granted free, non-transferable use of the information. NO 00008 * WARRANTY of ANY KIND is provided. This heading must NOT be removed from 00009 * the file. 00010 * 00011 */ 00012 00013 #ifndef NRF_TEMP_H__ 00014 #define NRF_TEMP_H__ 00015 00016 #include "nordic_global.h" 00017 #include "nrf51.h" 00018 00019 /** 00020 * @defgroup nrf_temperature TEMP (temperature) abstraction 00021 * @{ 00022 * @ingroup nrf_drivers temperature_example 00023 * @brief Temperature module init and read functions. 00024 * 00025 */ 00026 00027 00028 00029 /** 00030 * @brief Function for preparing the temp module for temperature measurement. 00031 * 00032 * This function initializes the TEMP module and writes to the hidden configuration register. 00033 * 00034 * @param none 00035 */ 00036 static __INLINE void nrf_temp_init(void) 00037 { 00038 /**@note Workaround for PAN_028 rev2.0A anomaly 31 - TEMP: Temperature offset value has to be manually loaded to the TEMP module */ 00039 *(uint32_t *) 0x4000C504 = 0; 00040 } 00041 00042 00043 00044 #define MASK_SIGN (0x00000200UL) 00045 #define MASK_SIGN_EXTENSION (0xFFFFFC00UL) 00046 00047 /** 00048 * @brief Function for reading temperature measurement. 00049 * 00050 * The function reads the 10 bit 2's complement value and transforms it to a 32 bit 2's complement value. 00051 * 00052 * @param none 00053 */ 00054 static __INLINE int32_t nrf_temp_read(void) 00055 { 00056 /**@note Workaround for PAN_028 rev2.0A anomaly 28 - TEMP: Negative measured values are not represented correctly */ 00057 return ((NRF_TEMP->TEMP & MASK_SIGN) != 0) ? (NRF_TEMP->TEMP | MASK_SIGN_EXTENSION) : (NRF_TEMP->TEMP); 00058 } 00059 00060 /** @} */ 00061 00062 #endif
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