From eab3414968da8228d6703e157f2516a9e2973b3e Mon Sep 17 00:00:00 2001
From: Elena ``of Valhalla'' Grandi <elena.valhalla@gmail.com>
Date: Fri, 2 Sep 2011 09:56:13 +0200
Subject: [PATCH] Arduino sketch with the DS1307

---
 ds1307/arduino_sketch/fuzzy_alarm_clock_ds1307.pde | 143 +++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 ds1307/arduino_sketch/fuzzy_alarm_clock_ds1307.pde

diff --git a/ds1307/arduino_sketch/fuzzy_alarm_clock_ds1307.pde b/ds1307/arduino_sketch/fuzzy_alarm_clock_ds1307.pde
new file mode 100644
index 0000000..394e537
--- /dev/null
+++ b/ds1307/arduino_sketch/fuzzy_alarm_clock_ds1307.pde
@@ -0,0 +1,143 @@
+#include <Wire.h>
+
+// minutes of "dawn" before alarm
+#define TIN 30
+// minutes of "dawn" + minutes of blue blinding light
+#define TOUT 45
+
+// number of available alarms
+#define NALARMS 4
+
+#define RPIN 3
+#define YPIN 5
+#define BPIN 6
+
+#define DS1307_ADDRESS 0x68
+
+int st = 0; // alarm status (minutes from alarm - TIN)
+char alarms[NALARMS][5];
+char cmin; // current minute
+int a = -1; // current alarm
+
+void setup () {
+    Serial.begin(57600);
+    Wire.begin();
+    
+    set_time(11,9,2,5,0,0,0);
+
+    pinMode(RPIN,OUTPUT);
+    pinMode(YPIN,OUTPUT);
+    pinMode(BPIN,OUTPUT);
+
+    digitalWrite(RPIN,255);
+    digitalWrite(YPIN,0);
+    digitalWrite(BPIN,0);
+    
+    // read alarms from storage
+    for ( int i = 0 ; i < NALARMS ; i ++ ) {
+        alarms[i][0] = 0;
+    }
+}
+
+void loop () {
+  
+  // read commands from serial
+  
+  // read time, check alarms
+  
+  check_time();
+  Serial.println(st);
+
+  
+  // act on status: LEDs and buzzer
+  if ( st > 0 ) {
+      set_leds();
+  }
+  
+  // wait about till the next second
+  
+  delay(1000);
+  
+}
+
+// Set the current time
+void set_time(int y,int m,int d, int w, int hh, int mm, int ss) {
+    Wire.beginTransmission(DS1307_ADDRESS);
+    Wire.send(0);
+    Wire.send(bin2bcd(ss));
+    Wire.send(bin2bcd(mm));
+    Wire.send(bin2bcd(hh));
+    Wire.send(w);
+    Wire.send(bin2bcd(d));
+    Wire.send(bin2bcd(m));
+    Wire.send(bin2bcd(y));
+    Wire.send(0);
+    Wire.endTransmission();
+}
+
+void check_time() {
+    Wire.beginTransmission(DS1307_ADDRESS);
+    Wire.send(0);
+    Wire.endTransmission();
+
+    Wire.requestFrom(DS1307_ADDRESS, 6);
+    Wire.receive();
+    int mm = bcd2bin(Wire.receive());
+    int hour = bcd2bin(Wire.receive());
+    int wday = Wire.receive();
+    int day = bcd2bin(Wire.receive());
+    int month = bcd2bin(Wire.receive());
+
+    if ( a < 0 ) {
+        for ( int i = 0; i < NALARMS ; i ++ ) {
+            // check alarm i
+            if ( ( alarms[i][0] & ( 1 << (wday - 1) ) ) || 
+                    (month == alarms[i][1] && day == alarms[i][2]) ) {
+                // this is alarm day!
+                if ( hour == alarms[i][3] && mm == alarms[i][4]) {
+                    // this is alarm hour!
+                    a = i;
+                    st = 0;
+                    cmin = mm;
+                    if ( ( alarms[i][0] & 128 ) == 0 ) {
+                        // this alarm won't be repeated
+                        alarms[i] = { 0,0,0,0,0 };
+                    }
+                    break;
+                }
+            } 
+        }
+    } else {
+        if ( cmin < mm ) {
+            cmin = mm;
+            st++;
+        }
+    }
+
+}
+
+void set_leds() {
+  if ( st > 0 && st < TIN) {
+      int y = int(float(st*255)/TIN);
+      int r = 255 - y;
+      analogWrite(RPIN,r);
+      analogWrite(YPIN,y);
+  } else if (st == TIN) {
+      analogWrite(RPIN,0);
+      analogWrite(YPIN,0);
+      analogWrite(BPIN,255);
+  } else if (st == TOUT) {
+      // reset stuff
+      st = 0;
+      a = -1;
+      analogWrite(RPIN,255);
+      analogWrite(YPIN,0);
+      analogWrite(BPIN,0);
+  }
+}
+
+// BCD helper functions from adafruit-RTClib
+static uint8_t bcd2bin (uint8_t val) { return val - 6 * (val >> 4); }
+static uint8_t bin2bcd (uint8_t val) { return val + 6 * (val / 10); }
+
+// vim: set filetype=c:
-- 
2.11.4.GIT