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Add FET swtich for battery ADC

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This commit is contained in:
tmk 2014-09-20 06:12:49 +09:00
parent d8dd18b421
commit 2015027da3
2 changed files with 19 additions and 0 deletions
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12
keyboard/hhkb_rn42/rn42/battery.c
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@ -21,6 +21,10 @@ void battery_init(void)
ADMUX = (1<<REFS1) | (1<<REFS0);
ADCSRA = (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0);
ADCSRA |= (1<<ADEN);
// ADC disable voltate divider(PF4)
DDRF |= (1<<4);
PORTF &= ~(1<<4);
}
// Indicator for battery
@ -79,6 +83,10 @@ bool battery_charging(void)
// Returns voltage in mV
uint16_t battery_voltage(void)
{
// ADC disable voltate divider(PF4)
DDRF |= (1<<4);
PORTF |= (1<<4);
volatile uint16_t bat;
//ADCSRA |= (1<<ADEN);
@ -98,6 +106,10 @@ uint16_t battery_voltage(void)
//ADCSRA &= ~(1<<ADEN);
// ADC disable voltate divider(PF4)
DDRF |= (1<<4);
PORTF &= ~(1<<4);
return (bat - BATTERY_ADC_OFFSET) * BATTERY_ADC_RESOLUTION;
}