Partyline Telephone Ringer

1/* Partyline telephone ringer
2  This will ring a telephone with various  ring cadences
3  which may include the standard UK and US rings as well
4  as  a number of partyline rings.
5  The number of different cadences is controlled  by
6  push buttons - so the number depends on the number
7  of buttons installed.
8*/
9
10//  set pins for ringing output
11  const int ringPin1 = 2;
12  const int ringPin2  = 3;
13
14// Set pin IDs for rows and columns for buttons
15const int rowA =  4;
16const int rowB = 5;
17const int rowC = 6;
18const int rowD = 7;
19const  int colA = 8;
20const int colB = 9;
21const int colC = 10;
22
23// set pin for  on-board LED for testing purposes
24const int LED = 13;
25
26// define variable  for setting length of short ring
27// long ring and NZ and US rings.  300mS should  be about
28// right for the short ring, and a long ring 900mS
29// this number  is the number of cycles, so at a frequency
30// 20Hz, and a length of 300mS, there  are 6 cycles
31// and at 900mS, 18 cycles.
32// At 20Hz, each cycle is 50mS
33unsigned  shortring = 6;
34unsigned longring = 18;
35unsigned shortpause = 200;
36unsigned  longpause = 2000;
37unsigned NZring = 8;  // NZ ring is 400 mS
38unsigned USring  = 40;  // US ring is 2000mS
39// define variable for setting frequency of ring
40//  e.g. for 20Hz, one cycle is 50mS, half cycle is 25mS
41// this number is the length  of one half cycle.
42unsigned frequency = 25;
43// declare variable used in subroutine
44unsigned  count = 1;
45
46
47void setup() {
48  
49//  Serial.begin(9600);
50//  Serial.println("Partyline  ringer");
51  
52  pinMode(LED, OUTPUT);
53
54  // setup pins for the ringing  output
55  pinMode(ringPin1, OUTPUT);
56  pinMode(ringPin2, OUTPUT);
57
58  //  setup the pins for the buttons
59  pinMode(rowA, OUTPUT);
60  pinMode(rowB, OUTPUT);
61  pinMode(rowC, OUTPUT);
62  pinMode(rowD, OUTPUT);
63  pinMode(colA, INPUT_PULLUP);
64  pinMode(colB, INPUT_PULLUP);
65  pinMode(colC, INPUT_PULLUP);
66
67  //Set  all output pins to LOW
68  digitalWrite(ringPin1, LOW);
69  digitalWrite(ringPin2,  LOW);
70  digitalWrite(rowA, HIGH);
71  digitalWrite(rowB, HIGH);
72  digitalWrite(rowC,  HIGH);
73  digitalWrite(rowD, HIGH);
74
75  digitalWrite(LED, LOW); // set LED  to off
76}
77
78void loop() {
79  
80  digitalWrite(rowA, LOW);
81
82  //  rowA, colA for A (.-) ring  
83  if (digitalRead(colA) == LOW) {
84    Ringing(shortring);
85    delay(shortpause);
86    Ringing(longring);
87    delay(longpause);
88  }
89
90  // rowA colB for D (-..) ring
91  if (digitalRead(colB) == LOW) {
92    Ringing(longring);
93    delay(shortpause);
94    Ringing(shortring);
95    delay(shortpause);
96    Ringing(shortring);
97    delay(longpause);
98  }
99  
100  // rowA colC  for J (.---) ring
101  if (digitalRead(colC) == LOW) {
102    Ringing(shortring);
103    delay(shortpause);
104    Ringing(longring);
105    delay(shortpause);
106    Ringing(longring);
107    delay(shortpause);
108    Ringing(longring);
109    delay(longpause);
110  }
111
112  digitalWrite(rowA, HIGH);
113  digitalWrite(rowB, LOW);
114
115  // rowB colA  for Partyline K (-.-) ring
116  if (digitalRead(colA) == LOW) {
117    Ringing(longring);
118    delay(shortpause);
119    Ringing(shortring);
120    delay(shortpause);
121    Ringing(longring);
122    delay(longpause);
123  }
124
125  // rowB colB for  Partyline M (--) ring
126  if (digitalRead(colB) == LOW) {
127    Ringing(longring);
128    delay(shortpause);
129    Ringing(longring);
130    delay(longpause);
131  }
132
133  // row B colC for R (.-.) ring
134  if (digitalRead(colC) == LOW) {
135    Ringing(shortring);
136    delay(shortpause);
137    Ringing(longring);
138    delay(shortpause);
139    Ringing(shortring);
140    delay(longpause);
141  }
142
143  digitalWrite(rowB, HIGH);
144  digitalWrite(rowC,  LOW);
145
146  // row C col A for S (...) ring
147  if (digitalRead(colA) == LOW)  {
148    Ringing(shortring);
149    delay(shortpause);
150    Ringing(shortring);
151    delay(shortpause);
152    Ringing(shortring);
153    delay(longpause);
154  }
155  
156  // row C col B for U (..-) ring
157  if (digitalRead(colB) == LOW) {
158    Ringing(shortring);
159    delay(shortpause);
160    Ringing(shortring);
161    delay(shortpause);
162    Ringing(longring);
163    delay(longpause);
164  }
165
166  // row C col C for W (.--) ring
167  if (digitalRead(colC) == LOW) {
168    Ringing(shortring);
169    delay(shortpause);
170    Ringing(longring);
171    delay(shortpause);
172    Ringing(longring);
173    delay(longpause);
174  }
175
176  digitalWrite(rowC, HIGH);
177  digitalWrite(rowD,  LOW);
178
179  // row D col A for US ring
180  if (digitalRead(colA) == LOW) {
181    Ringing(USring);
182    delay(longpause); // Since pause between rings for US  is 4000mS, repeat this
183    delay(longpause);
184  }
185  
186  // row D col B  for X (-..-) ring
187  if (digitalRead(colB) == LOW) {
188    Ringing(longring);
189    delay(shortpause);
190    Ringing(shortring);
191    delay(shortpause);
192    Ringing(shortring);
193    delay(shortpause);
194    Ringing(longring);
195    delay(longpause);
196  }
197  
198  // row D col C for NZ ring
199  if (digitalRead(colC)  == LOW) {
200    Ringing(NZring);
201    delay(shortpause);
202    Ringing(NZring);
203    delay(longpause);
204  }
205  
206  digitalWrite(rowD, HIGH);
207}
208
209void  Ringing(int length) {
210  count = 0;
211  while (count < length) {
212    digitalWrite(LED,  HIGH);   // turn the LED on
213    digitalWrite(ringPin1, LOW);
214    digitalWrite(ringPin2,  HIGH);
215    delay(frequency);                 
216    digitalWrite(LED, LOW);    // turn the LED off
217    digitalWrite(ringPin2, LOW);
218    digitalWrite(ringPin1,  HIGH);
219    delay(frequency);
220    count++;
221  }
222  digitalWrite(ringPin1,  LOW); // ensure both pins are LOW at end of ringing cycle
223//  Serial.println("finished  ringing");
224}
225