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38 lines
784 B
C
38 lines
784 B
C
/*
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* Copyright (C) 2014 INRIA
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*
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* The source code is licensed under the LGPLv2 license,
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* See the file LICENSE for more details.
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*/
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/**
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* @ingroup chronos
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* @{
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*/
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/**
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* @file
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* @brief eZ430-chronos battery readout (via ADC)
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*
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* @author Oliver Hahm <oliver.hahm@inria.fr>
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* @author Ludwig Ortmann <ludwig.ortmann@fu-berlin.de>
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*
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*/
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#include <stdint.h>
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#include <stdint.h>
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#include <cc430f6137.h>
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#include "cc430-adc.h"
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uint32_t battery_get_voltage(void)
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{
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uint32_t voltage;
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voltage = adc12_single_conversion(REFVSEL_1, ADC12SHT0_10, ADC12INCH_11);
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/* Ideally we have A11=0->AVCC=0V ... A11=4095(2^12-1)->AVCC=4V
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* --> (A11/4095)*4V=AVCC --> AVCC=(A11*4)/4095 */
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voltage = (voltage * 2 * 2 * 1000) / 4095;
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return voltage;
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}
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