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Add wait for charging capacitance of ADC S/H

tmk 10 years ago
parent
commit
86f82dd02d
1 changed files with 1 additions and 0 deletions
  1. 1 0
      keyboard/hhkb_rn42/rn42/battery.c

+ 1 - 0
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)) ;