26 lines
629 B
C
26 lines
629 B
C
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#include <avr/io.h>
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#include "batmon.h"
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void batmon_init()
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{
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ADCSRA = (1 << ADPS2) | (1 << ADPS1); // 125 kHz ADC clock
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ADMUX = ADC_CHANNEL | (1 << REFS0) | (1 << REFS1) | (1 << ADLAR); // Internal 1.2V bandgap, left adj.
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ADCSRB = 0; // Manual start
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#if ADC_CHANNEL < 7
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DIDR0 = (1 << ADC_CHANNEL); // Disconnect digital channel
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#endif
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// Enable voltage divider
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PORT_ADCC(DDR) |= PIN_ADCC;
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PORT_ADCC(PORT) &= ~PIN_ADCC;
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// Enable ADC
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ADCSRA |= (1 << ADEN);
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}
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inline uint8_t batmon_get_voltage()
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{
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ADCSRA |= (1 << ADSC); // TODO: Check whether this increases the power consumption of the chip by much
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return ADCH;
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}
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