From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Thu, 29 Nov 2012 13:05:08 +0000 (+0100)
Subject: adc.c: keep ADC enabled
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?p=bike-lights.git;a=commitdiff_plain;h=68424ad19806bd6f0b857e878bf632cf5851e7c5

adc.c: keep ADC enabled
---

diff --git a/firmware/adc.c b/firmware/adc.c
index 298256f..ba30e5c 100644
--- a/firmware/adc.c
+++ b/firmware/adc.c
@@ -16,8 +16,6 @@ static uint16_t adc1_gain20_offset_x16;
 
 static void inline setup_mux(unsigned char n)
 {
-	ADCSRA |= _BV(ADEN); // enable ADC
-
 	/* ADC numbering: PWM LEDs first, then ambient light sensor, battery sensor */
 	switch (n) {
 	case 0: // pwmled 1: 1.1V, ADC0,1 (PA0,1), gain 20
@@ -100,8 +98,6 @@ void init_adc()
 	}
 
 	ADCSRA |= _BV(ADIE); // enable IRQ
-
-	ADCSRA &= ~_BV(ADEN); // disable until needed
 }
 
 void susp_adc()
@@ -116,8 +112,6 @@ ISR(ADC_vect) { // IRQ handler
 	if (adc_vals)
 		// start the next conversion immediately
 		ADCSRA |= _BV(ADSC);
-	else
-		ADCSRA &= ~_BV(ADEN); // the last one, disable ADC
 
 	if (adc_vals < (1 << sum_shift))
 		 // drop the first conversion, use all others