From 68e463ad5c3b0225dbf293ac609b3b7784fe0a0b Mon Sep 17 00:00:00 2001
From: Leo C
Date: Fri, 5 Sep 2014 12:46:19 +0200
Subject: Use timer2 as 1ms sytem clock (instead timer1).

---
 avr/main.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

(limited to 'avr/main.c')

diff --git a/avr/main.c b/avr/main.c
index e4c98b8..65622cc 100644
--- a/avr/main.c
+++ b/avr/main.c
@@ -77,8 +77,8 @@ void setup_avr(void)
 	MCUCR = _BV(JTD);
 	MCUCR = _BV(JTD);
 
-	/* disable unused periphels */
-	PRR0 = _BV(PRTIM2) | _BV(PRTIM0) | _BV(PRADC);
+	/* disable unused peripherals */
+	PRR0 = _BV(PRTIM0) | _BV(PRADC);
 	PRR1 = _BV(PRTIM5) | _BV(PRTIM4) | _BV(PRTIM3) |
 		_BV(PRUSART3) | _BV(PRUSART2) | _BV(PRUSART1);
 
@@ -92,9 +92,10 @@ void setup_avr(void)
 
 	/* Timer */
 
-	OCR1A = F_CPU / 8 / 1000 - 1; // Timer1: 1000Hz interval (OC1A)
-	TCCR1B = 0b00001010;
-	TIMSK1 = _BV(OCIE1A); // Enable TC1.oca interrupt
+	OCR2A = F_CPU / 256 / 1000 - 1; /* Timer2: 1000Hz interval (OC2A) */
+	TCCR2A = (0b10 << WGM20);	/* CTC Mode */
+	TCCR2B = (0b110 << CS20);	/* Prescaler 256 */
+	TIMSK2 = _BV(OCIE2A);		/* Enable TC2.oca interrupt */
 }
 
 static
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