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16 lines
399 B
C
16 lines
399 B
C
#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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