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Clean ADC code of battery_voltage()

This commit is contained in:
tmk 2014-12-03 02:08:27 +09:00
parent 825be9d121
commit 25aee431bd
1 changed files with 2 additions and 13 deletions
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15
keyboard/hhkb_rn42/rn42/battery.c
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@ -20,7 +20,6 @@ void battery_init(void)
// Ref:2.56V band-gap, Input:ADC0(PF0), Prescale:128(16MHz/128=125KHz)
ADMUX = (1<<REFS1) | (1<<REFS0);
ADCSRA = (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0);
ADCSRA |= (1<<ADEN);
// digital input buffer disable(24.9.5)
DIDR0 = (1<<ADC0D) | (1<<ADC4D) | (1<<ADC5D) | (1<<ADC7D);
DIDR1 = (1<<AIN0D);
@ -92,23 +91,13 @@ uint16_t battery_voltage(void)
PORTF |= (1<<4);
volatile uint16_t bat;
//ADCSRA |= (1<<ADEN);
// discard first result
ADCSRA |= (1<<ADSC);
while (ADCSRA & (1<<ADSC)) ;
bat = ADC;
// discard second result
ADCSRA |= (1<<ADSC);
while (ADCSRA & (1<<ADSC)) ;
bat = ADC;
ADCSRA |= (1<<ADEN);
ADCSRA |= (1<<ADSC);
while (ADCSRA & (1<<ADSC)) ;
bat = ADC;
//ADCSRA &= ~(1<<ADEN);
ADCSRA &= ~(1<<ADEN);
// ADC disable voltate divider(PF4)
DDRF |= (1<<4);