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#include <Wire.h>
#include <RealTimeClockDS1307.h>
// minutes of "dawn" before alarm
#define TIN 30
// "dawn" + "daylight"
#define TDAY 45
// "dawn" + "daylight" + blue blinding light
#define TOUT 75
// number of available alarms; max 10 for storage in the DS1307 ram
#define NALARMS 4
// pins and addressed
#define RPIN 3
#define YPIN 5
#define BPIN 6
int st = 0; // alarm status (minutes from alarm - TIN)
char alarms[NALARMS][5]; // alarm settings
char cmin; // current minute
int a = -1; // current alarm
void setup () {
Serial.begin(9600);
Wire.begin();
pinMode(RPIN,OUTPUT);
pinMode(YPIN,OUTPUT);
pinMode(BPIN,OUTPUT);
digitalWrite(RPIN,255);
digitalWrite(YPIN,255);
digitalWrite(BPIN,0);
// DEBUG: we want to read the setup messages
delay(5000);
digitalWrite(YPIN,0);
// if the RTC is already running read alarms and status,
// otherwise set everything to the default
if ( RTC.readData(0x00) >> 7 ) {
Serial.println("Setup the clock");
for ( int i = 0 ; i < NALARMS ; i ++ ) {
for ( int j = 0; j < 5 ; j ++ ) {
alarms[i][j] = 0;
}
}
st = 0;
a = -1;
// DEBUG: we don't want to set the time until we receive
// it from serial, but serial is not implemented yet
alarms[0] = {16,0,0,13,40};
set_time(11,9,2,5,13,39,30);
} else {
st = RTC.readData(0x08);
a = RTC.readData(0x09);
cmin = RTC.readData(0x0a);
// FIXME: we want to update st to the time passed
// since the data was saved
for ( int i = 0; i < NALARMS ; i ++ ) {
for ( int j = 0; j < 5 ; j ++ ) {
alarms[i][j] = RTC.readData(0x0b + i*5 + j);
}
}
}
}
void loop () {
// read commands from serial
// read time, check alarms
check_time();
//DEBUG
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) {
RTC.setYear(y);
RTC.setMonth(m);
RTC.setDate(m);
RTC.setDayOfWeek(w);
RTC.setHours(hh);
RTC.setMinutes(mm);
RTC.setSeconds(ss);
RTC.switchTo24h();
RTC.setClock();
}
void check_time() {
RTC.readClock();
int mm = RTC.getMinutes();
int hour = RTC.getHours();
int wday = RTC.getDayOfWeek();
int day = RTC.getDate();
int month = RTC.getMonth();
// DEBUG
Serial.print("Time: ");
Serial.print(hour,DEC);
Serial.print(":");
Serial.print(mm,DEC);
Serial.print(":");
Serial.println(RTC.getSeconds());
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 = 1;
cmin = mm;
if ( ( alarms[i][0] & 128 ) == 0 ) {
// this alarm won't be repeated
alarms[i] = { 0,0,0,0,0 };
for ( int j = 0; j < 5 ; j++ ) {
RTC.writeData(0x0b + i*5 + j,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 && st < TDAY ) {
analogWrite(RPIN,0);
analogWrite(YPIN,255);
analogWrite(BPIN,0);
}else if (st >= TDAY && st < TOUT) {
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);
}
}
// vim: set filetype=c:
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