Add wait for charging capacitance of ADC S/H

10 years ago · 86f82dd02d
parent 2d7973fc3f
commit 86f82dd02d
1 changed files with 1 additions and 0 deletions
--- a/keyboard/hhkb_rn42/rn42/battery.c
+++ b/keyboard/hhkb_rn42/rn42/battery.c
@ -92,6 +92,7 @@ uint16_t battery_voltage(void)

    volatile uint16_t bat;
    ADCSRA |= (1<<ADEN);
+    _delay_ms(1);   // wait for charging S/H capacitance

    ADCSRA |= (1<<ADSC);
    while (ADCSRA & (1<<ADSC)) ;