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Add wait for charging capacitance of ADC S/H

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tmk 2014-12-03 14:22:10 +09:00
parent 2d7973fc3f
commit 86f82dd02d
1 changed files with 1 additions and 0 deletions
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keyboard/hhkb_rn42/rn42/battery.c
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@ -92,6 +92,7 @@ uint16_t battery_voltage(void)
volatile uint16_t bat; volatile uint16_t bat;
ADCSRA |= (1<<ADEN); ADCSRA |= (1<<ADEN);
_delay_ms(1); // wait for charging S/H capacitance
ADCSRA |= (1<<ADSC); ADCSRA |= (1<<ADSC);
while (ADCSRA & (1<<ADSC)) ; while (ADCSRA & (1<<ADSC)) ;