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nrf_temp.h
00001 /* 00002 * Copyright (c) Nordic Semiconductor ASA 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without modification, 00006 * are permitted provided that the following conditions are met: 00007 * 00008 * 1. Redistributions of source code must retain the above copyright notice, this 00009 * list of conditions and the following disclaimer. 00010 * 00011 * 2. Redistributions in binary form must reproduce the above copyright notice, this 00012 * list of conditions and the following disclaimer in the documentation and/or 00013 * other materials provided with the distribution. 00014 * 00015 * 3. Neither the name of Nordic Semiconductor ASA nor the names of other 00016 * contributors to this software may be used to endorse or promote products 00017 * derived from this software without specific prior written permission. 00018 * 00019 * 00020 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 00021 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 00022 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 00023 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR 00024 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 00025 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 00026 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 00027 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00028 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00029 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00030 * 00031 */ 00032 00033 #ifndef NRF_TEMP_H__ 00034 #define NRF_TEMP_H__ 00035 00036 #include "nrf.h" 00037 00038 /** 00039 * @defgroup nrf_temperature TEMP (temperature) abstraction 00040 * @{ 00041 * @ingroup nrf_drivers temperature_example 00042 * @brief Temperature module init and read functions. 00043 * 00044 */ 00045 00046 /**@cond NO_DOXYGEN */ 00047 #define MASK_SIGN (0x00000200UL) 00048 #define MASK_SIGN_EXTENSION (0xFFFFFC00UL) 00049 00050 /** 00051 * @brief Function for preparing the temp module for temperature measurement. 00052 * 00053 * This function initializes the TEMP module and writes to the hidden configuration register. 00054 */ 00055 static __INLINE void nrf_temp_init(void) 00056 { 00057 /**@note Workaround for PAN_028 rev2.0A anomaly 31 - TEMP: Temperature offset value has to be manually loaded to the TEMP module */ 00058 *(uint32_t *) 0x4000C504 = 0; 00059 } 00060 00061 /** 00062 * @brief Function for reading temperature measurement. 00063 * 00064 * The function reads the 10 bit 2's complement value and transforms it to a 32 bit 2's complement value. 00065 */ 00066 static __INLINE int32_t nrf_temp_read(void) 00067 { 00068 /**@note Workaround for PAN_028 rev2.0A anomaly 28 - TEMP: Negative measured values are not represented correctly */ 00069 return ((NRF_TEMP->TEMP & MASK_SIGN) != 0) ? (NRF_TEMP->TEMP | MASK_SIGN_EXTENSION) : (NRF_TEMP->TEMP); 00070 } 00071 /**@endcond */ 00072 00073 /** @} */ 00074 00075 #endif
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