| /****************************************************************************** |
| * Filename: aon_batmon.c |
| * Revised: 2015-12-07 16:22:56 +0100 (Mon, 07 Dec 2015) |
| * Revision: 45269 |
| * |
| * Description: Driver for the AON Battery and Temperature Monitor |
| * |
| * Copyright (c) 2015 - 2016, Texas Instruments Incorporated |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1) Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * |
| * 2) Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * 3) Neither the name of the ORGANIZATION nor the names of its contributors may |
| * be used to endorse or promote products derived from this software without |
| * specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| * |
| ******************************************************************************/ |
| |
| #include <driverlib/aon_batmon.h> |
| #include <inc/hw_fcfg1.h> |
| |
| //***************************************************************************** |
| // |
| // Handle support for DriverLib in ROM: |
| // This section will undo prototype renaming made in the header file |
| // |
| //***************************************************************************** |
| #if !defined(DOXYGEN) |
| #undef AONBatMonTemperatureGetDegC |
| #define AONBatMonTemperatureGetDegC NOROM_AONBatMonTemperatureGetDegC |
| #endif |
| |
| //***************************************************************************** |
| // |
| // AONBatMonTemperatureGetDegC() |
| // Returns sign extended temperature in Deg C (-256 .. +255) |
| // |
| //***************************************************************************** |
| int32_t |
| AONBatMonTemperatureGetDegC( void ) |
| { |
| int32_t signedTemp ; // Signed extended temperature with 8 fractional bits |
| int32_t tempCorrection ; // Voltage dependent temp correction with 8 fractional bits |
| int8_t voltageSlope ; // Signed byte value representing the TEMP slope with battery voltage, in degrees C/V, with 4 fractional bits. |
| |
| // |
| // Shift left then right to sign extend the BATMON_TEMP field |
| // |
| signedTemp = ((((int32_t)HWREG( AON_BATMON_BASE + AON_BATMON_O_TEMP )) |
| << ( 32 - AON_BATMON_TEMP_INT_W - AON_BATMON_TEMP_INT_S )) |
| >> ( 32 - AON_BATMON_TEMP_INT_W - AON_BATMON_TEMP_INT_S )); |
| |
| // |
| // Typecasting voltageSlope to int8_t prior to assignment in order to make sure sign extension works properly |
| // Using byte read (HWREGB) in order to make more efficient code since voltageSlope is assigned to bits[7:0] of FCFG1_O_MISC_TRIM |
| // |
| voltageSlope = ((int8_t)HWREGB( FCFG1_BASE + FCFG1_O_MISC_TRIM )); |
| tempCorrection = (( voltageSlope * (((int32_t)HWREG( AON_BATMON_BASE + AON_BATMON_O_BAT )) - 0x300 )) >> 4 ); |
| |
| return ((( signedTemp - tempCorrection ) + 0x80 ) >> 8 ); |
| } |
| |
| |
| // See aon_batmon.h for implementation of remaining functions |
