From bedbcdc4de680720deff4b6e113a3ec1a0690482 Mon Sep 17 00:00:00 2001
From: Lars-Dominik Braun <lars@6xq.net>
Date: Tue, 22 Jul 2014 15:58:55 +0200
Subject: Speaker and LED pwm

Something is not correct here, stack overflow?
---
 speaker.c | 32 ++++++++++++++------------------
 1 file changed, 14 insertions(+), 18 deletions(-)

(limited to 'speaker.c')

diff --git a/speaker.c b/speaker.c
index 2eace8d..92c1e78 100644
--- a/speaker.c
+++ b/speaker.c
@@ -1,49 +1,45 @@
 /*	speaker control, uses timer2
  */
 
+#include "common.h"
+
 #include <avr/io.h>
 #include <avr/interrupt.h>
+#include <util/delay.h>
 #include <stdbool.h>
+#include <assert.h>
+#include <stdlib.h>
 
 #include "speaker.h"
 
-static bool value = false;
-
-static void speakerSet () {
-	if (value) {
-		PORTD = PORTD | (1 << PD6);
-	} else {
-		PORTD = PORTD & ~(1 << PD6);
-	}
-}
-
 ISR(TIMER2_OVF_vect) {
-	value = !value;
-	speakerSet ();
+	PORTD ^= (1 << PD6);
 }
 
 void speakerInit () {
 	/* set PD6 to output */
 	DDRD |= (1 << PD6);
-	/* value is false */
-	speakerSet ();
+	/* turn off */
+	PORTD = PORTD & ~(1 << PD6);
 }
 
-void speakerStart () {
+void speakerStart (const speakerMode mode) {
 	/* reset timer value */
 	TCNT2 = 0;
-	/* set normal mode timer0 */
+	/* set normal mode */
 	TCCR2A = 0;
 	/* enable overflow interrupt */
 	TIMSK2 = (1 << TOIE2);
 	/* io clock with 1024 prescaler */
 	TCCR2B = ((TCCR2B & ~(1 << CS21)) | (1 << CS22) | (1 << CS20));
+	_delay_ms (50);
+	speakerStop ();
 }
 
 void speakerStop () {
 	/* zero clock source */
 	TCCR2B = 0;
-	value = false;
-	speakerSet ();
+	/* turn off */
+	PORTD = PORTD & ~(1 << PD6);
 }
 
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