Digital Wall Clock

1#include <EEPROM.h>
2#include <Sodaq_DS3231.h>
3#include <Wire.h>
4
5/*
6  * 
7 *     Output A frequency: 16 MHz / 8 / 256 = 7812.5Hz//Prescaler is 8//CS21  is ON
8    Output A duty cycle: (180+1) / 256 = 70.7%
9    Output B frequency:  16 MHz / 8 / 256 = 7812.5Hz //Prescaler is 8//CS21 is ON
10    Output B duty cycle:  (50+1) / 256 = 19.9% 
11
12The output frequency is the 16MHz system clock frequency,  divided by the prescaler value (64), divided by the 256 cycles it takes for the  timer to wrap around. 
13Note that fast PWM holds the output high one cycle longer  than the compare register value. 
14 */
15boolean set_button;//setting button
16boolean  dec_button;//decrease button
17boolean inc_button;//increase button
18
19boolean  trig_set_button;
20boolean trig_dec_button;
21boolean trig_inc_button;
22boolean  trig_writing;
23boolean trig_dots = false;
24boolean trig_temp;
25
26int clock_array[10]={126,48,109,121,51,91,95,112,127,123};//from  0 to 9
27int seg1_array[7] = {23,25,27,29,31,33,35};//G,F,E,D,C,B,A
28int seg2_array[7]  = {22,24,26,28,30,32,34};//G,F,E,D,C,B,A
29int seg3_array[7] = {37,39,41,43,45,47,49};//G,F,E,D,C,B,A
30int  seg4_array[7] = {36,38,40,42,44,46,48};//G,F,E,D,C,B,A
31
32unsigned int tm_second,  tm_minute, tm_hour, tm_day, tm_month, tm_year;
33uint32_t old_ts; //RTC data//
34int  h_t;
35int h_d;
36int m_t;
37int m_d;
38int pwm_h;//hundred
39int pwm_t;//ten
40int  pwm_d;
41short previous_second;
42
43float temp;
44unsigned int temp_int;
45short  temp_1;
46short temp_2;
47short temp_3;
48short temp_4;
49unsigned int pwm_brightness;
50
51int  mode = 0;
52
53void setup() {
54  //INPUTS//
55  pinMode(11, INPUT_PULLUP);
56  pinMode(12, INPUT_PULLUP);
57  pinMode(13, INPUT_PULLUP);
58  //PWM SETUP//
59  pinMode(10, OUTPUT); //OCR2A PIN 10 for MEGA2560//PIN 3 for UNO
60  pinMode(9,  OUTPUT);//OCR2B PIN 9 for MEGA2560//PIN 11 for UNO
61  TCCR2A = _BV(COM2A1) | _BV(COM2B1)  | _BV(WGM21) | _BV(WGM20);
62  TCCR2B = _BV(CS21);//7745Hz
63  pwm_brightness  = EEPROM.read(0);
64  //Clock SETUP//
65  Wire.begin(); //enable I2C//
66  rtc.begin();  //enable RTC//
67  //OUTPUTS//
68  pinMode(22, OUTPUT);
69  pinMode(23, OUTPUT);
70  pinMode(24, OUTPUT);
71  pinMode(25, OUTPUT);
72  pinMode(26, OUTPUT);
73  pinMode(27,  OUTPUT);
74  pinMode(28, OUTPUT);
75  pinMode(29, OUTPUT);
76  pinMode(30, OUTPUT);
77  pinMode(31, OUTPUT);
78  pinMode(32, OUTPUT);
79  pinMode(33, OUTPUT);
80  pinMode(34,  OUTPUT);
81  pinMode(35, OUTPUT);
82  pinMode(36, OUTPUT);
83  pinMode(37, OUTPUT);
84  pinMode(38, OUTPUT);
85  pinMode(39, OUTPUT);
86  pinMode(40, OUTPUT);
87  pinMode(41,  OUTPUT);
88  pinMode(42, OUTPUT);
89  pinMode(43, OUTPUT);
90  pinMode(44, OUTPUT);
91  pinMode(45, OUTPUT);
92  pinMode(46, OUTPUT);
93  pinMode(47, OUTPUT);
94  pinMode(48,  OUTPUT);
95  pinMode(49, OUTPUT);
96  pinMode(50, OUTPUT);//upper dot
97  pinMode(51,  OUTPUT);//down dot
98}
99
100void loop() {
101set_button = !digitalRead(13);
102dec_button  = !digitalRead(12);
103inc_button = !digitalRead(11);
104
105if(set_button==false){trig_set_button  = false;}
106if(set_button==true&&trig_set_button==false)
107{
108  mode++;
109  if(mode>3){mode = 0;}//only 3 modes enabled
110  trig_set_button = true;
111}
112if(previous_second!=tm_second)
113{
114   trig_dots = !trig_dots;
115  previous_second = tm_second;
116}
117///////////////////////////////////
118//Buttons  Mode configuration//
119switch (mode)
120{
121  case 0:
122  break;
123  case 1:
124     trig_writing = true;//enabling this trig to write data one shoot
125     
126     if(dec_button==false){trig_dec_button = false;}
127     if(dec_button==true&&trig_dec_button==false)
128     {
129      if(tm_hour>0&&tm_hour<=24){tm_hour--;}
130      trig_dec_button  = true;
131     }
132     if(inc_button==false){trig_inc_button = false;}
133     if(inc_button==true&&trig_inc_button==false)
134     {
135      if(tm_hour>=0&&tm_hour<24){tm_hour++;}
136      trig_inc_button  = true;
137     }
138  break;
139  case 2:
140     if(dec_button==false){trig_dec_button  = false;}
141     if(dec_button==true&&trig_dec_button==false)
142     {
143      if(tm_minute>0&&tm_minute<=59){tm_minute--;}
144      trig_dec_button = true;
145     }
146     if(inc_button==false){trig_inc_button  = false;}
147     if(inc_button==true&&trig_inc_button==false)
148     {
149      if(tm_minute>=0&&tm_minute<59){tm_minute++;}
150      trig_inc_button = true;
151     }
152  break;
153  case 3:
154     if(dec_button==false){trig_dec_button  = false;}
155     if(dec_button==true&&trig_dec_button==false)
156     {
157      if(pwm_brightness>0&&pwm_brightness<=255){pwm_brightness--;}
158      trig_dec_button = true;
159     }
160     if(inc_button==false){trig_inc_button  = false;}
161     if(inc_button==true&&trig_inc_button==false)
162     {
163      if(pwm_brightness>=0&&pwm_brightness<255){pwm_brightness++;}
164      trig_inc_button = true;
165     }
166  break;
167}
168if(mode==0){
169        //RTC//
170    if(trig_writing==true)//writing in one shoot mode
171    {
172      DateTime  dt(2019, 2, 19, tm_hour, tm_minute, 0, 0);
173      rtc.setDateTime(dt);
174      EEPROM.write(0,  pwm_brightness);
175      delay(50);
176      trig_writing = false;
177    }
178  rtc.convertTemperature();
179  if(trig_temp==false){temp = rtc.getTemperature();}//not  to update temperature value when display the temp
180  DateTime now = rtc.now();  //get the current date-time
181  uint32_t ts = now.getEpoch();
182  if (old_ts ==  0 || old_ts != ts) {
183  old_ts = ts;
184  tm_second = now.second();
185  tm_minute  = now.minute();
186  tm_hour = now.hour();
187  tm_day = now.date();
188  tm_month  = now.month();
189  tm_year = now.year();
190  }
191}//end if mode
192 //separating  hour and minute//
193  h_t = (tm_hour % 100)/10;
194  h_d = tm_hour % 10;
195  m_t  = (tm_minute % 100)/10;
196  m_d = tm_minute % 10;
197  //////////////////////
198  
199  //separating pwm_brightness//
200  pwm_h = (pwm_brightness % 1000)/100;
201  pwm_t = (pwm_brightness % 100)/10;
202  pwm_d = pwm_brightness % 10;
203  //////////////////////
204  
205  //separating temperature//
206  temp_int = temp * 100;//convert point float  to integer
207  temp_1 = (temp_int % 10000)/1000;
208  temp_2 = (temp_int % 1000)/100;
209  temp_3 = (temp_int % 100)/10;
210  temp_4 = temp_int % 10;
211  //////////////////////
212for(int  i=0;i<7;i++)
213{
214  switch (mode)
215  {
216    case 0://normal time mode
217    
218  if(tm_second<30||tm_second>32)//display the DS3231 temperature between  30 and 32 second of each minute
219  {
220    trig_temp = false;
221  if(tm_hour>9)
222  {
223   digitalWrite(seg1_array[i], bitRead(clock_array[h_t], i));//Output of  1 segment
224   digitalWrite(seg2_array[i], bitRead(clock_array[h_d], i));//Output  of 2 segment
225  }else
226  {
227   digitalWrite(seg1_array[i], bitRead(clock_array[0],  i));//Output of 1 segment
228   digitalWrite(seg2_array[i], bitRead(clock_array[tm_hour],  i));//Output of 2 segment
229  }
230  if(tm_minute>9)
231  {
232   digitalWrite(seg3_array[i],  bitRead(clock_array[m_t], i));//Output of 3 segment
233   digitalWrite(seg4_array[i],  bitRead(clock_array[m_d], i));//Output of 4 segment
234  }else//displaying DS3231  temperature
235  {
236   digitalWrite(seg3_array[i], bitRead(clock_array[0], i));//Output  of 3 segment
237   digitalWrite(seg4_array[i], bitRead(clock_array[tm_minute], i));//Output  of 4 segment
238  }
239   digitalWrite(50, trig_dots);
240   digitalWrite(51, trig_dots);
241  }else
242  {
243    trig_temp = true;
244    digitalWrite(seg1_array[i], bitRead(clock_array[temp_1],  i));//Output of 1 segment
245    digitalWrite(seg2_array[i], bitRead(clock_array[temp_2],  i));//Output of 2 segment
246    digitalWrite(seg3_array[i], bitRead(clock_array[temp_3],  i));//Output of 3 segment
247    digitalWrite(seg4_array[i], bitRead(clock_array[temp_4],  i));//Output of 4 segment
248    digitalWrite(50, LOW);
249    digitalWrite(51,  HIGH);
250  }
251  break;
252  case 1://adjusting hour
253  if(tm_hour>9)
254  {
255   digitalWrite(seg1_array[i], bitRead(clock_array[h_t], i));//Output of 1 segment
256   digitalWrite(seg2_array[i], bitRead(clock_array[h_d], i));//Output of 2 segment
257  }else
258  {
259   digitalWrite(seg1_array[i], bitRead(clock_array[0], i));//Output  of 1 segment
260   digitalWrite(seg2_array[i], bitRead(clock_array[tm_hour], i));//Output  of 2 segment
261  }
262   digitalWrite(seg3_array[i], 0);//OFF the 3 segment
263   digitalWrite(seg4_array[i], 0);//OFF the 4 segment
264   digitalWrite(50, 0);//OFF  the dot
265   digitalWrite(50, 0);//OFF the dot
266  break;
267  case 2://adjustng  minute
268  if(tm_minute>9)
269  {
270   digitalWrite(seg3_array[i], bitRead(clock_array[m_t],  i));//Output of 3 segment
271   digitalWrite(seg4_array[i], bitRead(clock_array[m_d],  i));//Output of 4 segment
272  }else
273  {
274   digitalWrite(seg3_array[i], bitRead(clock_array[0],  i));//Output of 3 segment
275   digitalWrite(seg4_array[i], bitRead(clock_array[tm_minute],  i));//Output of 4 segment
276  }
277   digitalWrite(seg1_array[i], 0);//OFF the  1 segment
278   digitalWrite(seg2_array[i], 0);//OFF the 2 segment
279   digitalWrite(50,  0);//OFF the dot
280   digitalWrite(50, 0);//OFF the dot
281  break;
282  case 3://adjusting  pwm
283   if(pwm_brightness>99)
284  {
285    digitalWrite(seg1_array[i], LOW);//Output  of 1 segment
286    digitalWrite(seg2_array[i], bitRead(clock_array[pwm_h], i));//Output  of 2 segment
287    digitalWrite(seg3_array[i], bitRead(clock_array[pwm_t], i));//Output  of 3 segment
288    digitalWrite(seg4_array[i], bitRead(clock_array[pwm_d], i));//Output  of 4 segment
289  }else if(pwm_brightness>9&&pwm_brightness<=99)
290  {
291    digitalWrite(seg1_array[i],  LOW);//Output of 1 segment
292    digitalWrite(seg2_array[i], LOW);//Output of 2  segment
293    digitalWrite(seg3_array[i], bitRead(clock_array[pwm_t], i));//Output  of 3 segment
294    digitalWrite(seg4_array[i], bitRead(clock_array[pwm_d], i));//Output  of 4 segment
295  }else if(pwm_brightness<=9)
296  {
297    digitalWrite(seg1_array[i],  LOW);//Output of 1 segment
298    digitalWrite(seg2_array[i], LOW);//Output of 2  segment
299    digitalWrite(seg3_array[i], LOW);//Output of 3 segment
300    digitalWrite(seg4_array[i],  bitRead(clock_array[pwm_d], i));//Output of 4 segment
301  }
302  digitalWrite(50,  0);//OFF the dot
303  digitalWrite(51, 0);//OFF the dot
304  break;
305  }//end  switch(mode)
306}//end for
307  OCR2A = pwm_brightness;
308  OCR2B = 5;//has no  effect
309}//end loop
310