From: Robin Krens <robin@robinkrens.nl>
Date: Fri, 20 May 2022 13:06:59 +0000 (+0200)
Subject: hbc: internal vref + switch off interrupts after detect
X-Git-Url: https://robinkrens.nl/gitweb/?p=lra-as-sensor;a=commitdiff_plain;h=f99860f16348c1622450bb81db26a14ceb795a87

hbc: internal vref + switch off interrupts after detect
---

diff --git a/hbc.c b/hbc.c
index c5c2c0d..38332a1 100644
--- a/hbc.c
+++ b/hbc.c
@@ -13,6 +13,7 @@ ISR(SIG_COMPARATOR)
 {
 	if (ACSR & (1 << ACO)) {
 		PORTB |= (1 << PB4);
+		ACSR &= ~(1 << ACIE);
 	} else {
 		PORTB &= ~(1 << PB4);
 	}
@@ -22,7 +23,6 @@ EMPTY_INTERRUPT(TIM0_COMPA_vect);
 
 static void switch_idle(void)
 {
-	sei();
 	set_sleep_mode(SLEEP_MODE_IDLE);
 	sleep_mode();
 }
@@ -55,7 +55,7 @@ static void config_comparator(void)
 	//ADMUX |= (1 << MUX0); /* ADC1 as negative input */
 	
 	ACSR &= ~(1 << ACD); /* enable comparator */
-	//ACSR |= (1 << ACBG);
+	ACSR |= (1 << ACBG);
 	//ACSR |= (1 << ACIS1) | (1 << ACIS0);
 
 	DIDR0 |= (1 << AIN1D) | (1 << AIN0D);
@@ -74,6 +74,7 @@ int main(void)
 	//set_ref_voltage();
 	config_comparator();
 	sei();
+	switch_idle();
 
 	while(1) {
 		_delay_ms(100);