Clean ADC code of battery_voltage()
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@ -20,7 +20,6 @@ void battery_init(void)
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// Ref:2.56V band-gap, Input:ADC0(PF0), Prescale:128(16MHz/128=125KHz)
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ADMUX = (1<<REFS1) | (1<<REFS0);
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ADCSRA = (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0);
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ADCSRA |= (1<<ADEN);
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// digital input buffer disable(24.9.5)
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DIDR0 = (1<<ADC0D) | (1<<ADC4D) | (1<<ADC5D) | (1<<ADC7D);
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DIDR1 = (1<<AIN0D);
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@ -92,23 +91,13 @@ uint16_t battery_voltage(void)
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PORTF |= (1<<4);
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volatile uint16_t bat;
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//ADCSRA |= (1<<ADEN);
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// discard first result
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ADCSRA |= (1<<ADSC);
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while (ADCSRA & (1<<ADSC)) ;
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bat = ADC;
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// discard second result
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ADCSRA |= (1<<ADSC);
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while (ADCSRA & (1<<ADSC)) ;
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bat = ADC;
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ADCSRA |= (1<<ADEN);
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ADCSRA |= (1<<ADSC);
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while (ADCSRA & (1<<ADSC)) ;
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bat = ADC;
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//ADCSRA &= ~(1<<ADEN);
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ADCSRA &= ~(1<<ADEN);
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// ADC disable voltate divider(PF4)
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DDRF |= (1<<4);
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