From bf5436ca68fdbeb7c9e1f02900ec27913fba8fae Mon Sep 17 00:00:00 2001
From: Elena ``of Valhalla'' Grandi <elena.valhalla@gmail.com>
Date: Fri, 23 Dec 2011 21:44:39 +0100
Subject: Better alarm ring via timer manipulation

Timer procedure by Diego
---
 .../fuzzy_alarm_clock_ds1307.pde                   | 54 +++++++++++-----------
 1 file changed, 28 insertions(+), 26 deletions(-)

(limited to 'arduino_sketch/fuzzy_alarm_clock_ds1307')

diff --git a/arduino_sketch/fuzzy_alarm_clock_ds1307/fuzzy_alarm_clock_ds1307.pde b/arduino_sketch/fuzzy_alarm_clock_ds1307/fuzzy_alarm_clock_ds1307.pde
index 8a88b38..c08bd6a 100644
--- a/arduino_sketch/fuzzy_alarm_clock_ds1307/fuzzy_alarm_clock_ds1307.pde
+++ b/arduino_sketch/fuzzy_alarm_clock_ds1307/fuzzy_alarm_clock_ds1307.pde
@@ -3,7 +3,7 @@
 #include <RealTimeClockDS1307.h>
 
 // minutes of "dawn" before alarm
-#define TIN 30
+#define TIN 2
 // "dawn" + "daylight"
 #define TDAY 45
 // "dawn" + "daylight" + blue blinding light
@@ -13,17 +13,22 @@
 #define NALARMS 4
 
 // pins and addressed
-#define RPIN 3
-#define YPIN 5
-#define BPIN 6
+#define RPIN 5
+#define YPIN 6
+#define BPIN 9
 
-#define APIN 9
+#define APIN0 3
+#define APIN1 11
 
 int st = 0; // alarm status (minutes from alarm - TIN)
 char alarms[NALARMS][5]; // alarm settings
 char cmin; // current minute
 int a = -1; // current alarm
 char dbg = 0; // print debug informations
+bool ringing = false; // sound the alarm
+
+#define NFREQ 9
+int freq[] = { 255, 192, 128, 96, 64, 96, 128, 192, 255 }; // frequencies for the alarm
 
 void setup () {
     Serial.begin(9600);
@@ -33,6 +38,11 @@ void setup () {
     pinMode(YPIN,OUTPUT);
     pinMode(BPIN,OUTPUT);
 
+    pinMode(APIN0,INPUT);
+    pinMode(APIN1,INPUT);
+    TCCR2A = _BV(COM2A0) | _BV(COM2B1) | _BV(WGM20);
+    TCCR2B = _BV(WGM22) | _BV(CS22);
+
     digitalWrite(RPIN,255);
     digitalWrite(YPIN,255);
     digitalWrite(BPIN,0);
@@ -90,9 +100,13 @@ void loop () {
       set_leds();
   }
   if ( st == TIN ) {
+      ringing = true;
+  } else {
+      ringing = false;
+  }
+  if ( ringing ) {
       ring_alarm();
   }
-  
   // wait about till the next second
 
   delay(1000);
@@ -339,26 +353,14 @@ void set_leds() {
 // PC speaker
 //
 void ring_alarm() {
-        analogWrite(APIN,8);
-        delay(500);
-        analogWrite(APIN,0);
-        delay(500);
-        analogWrite(APIN,16);
-        delay(500);
-        analogWrite(APIN,0);
-        delay(500);
-        analogWrite(APIN,32);
-        delay(500);
-        analogWrite(APIN,0);
-        delay(500);
-        analogWrite(APIN,64);
-        delay(500);
-        analogWrite(APIN,0);
-        delay(500);
-        analogWrite(APIN,128);
-        delay(500);
-        analogWrite(APIN,0);
-        delay(500);
+
+    pinMode(APIN1,OUTPUT);
+    for (int i=0; i<NFREQ ; i++) {
+        OCR2A = freq[i];
+        delay(50);
+    }
+    pinMode(APIN1,INPUT);
+
 }
 
 // vim: set filetype=c:
-- 
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