Implementing a Heart Beat in your code

1//
2// Example of a heart_beat code for use in any sketch where a visual  indication is
3// required that the sketch is operating.
4//
5// Ron D Bentley,  Stafford, UK, July 2021
6//
7// This example and code is in the public domain  and
8// may be used without restriction and without warranty.
9//
10// Note  that
11// 1. this example uses the LED_BUILTIN digital pin, normally digital pin  13,
12//    so no wiring or external LED is needed to implement this code.
13//    However, if an external LED is wished, then simply decide which digital pin
14//    is to be used, change to definition 'hear_beat_pin' to be this pin mumber
15//    and wire in the external LED.
16//
17
18#define heart_beat_pin   LED_BUILTIN  // digital pin for heart beat LED
19
20long unsigned heart_beat_freq = 1000;  // time(milliseconds) of heart beat frequency
21
22long unsigned heart_beat_on_off_time;  // the time the LED is on and off - 1/2 frequency
23long unsigned last_heart_beat_time;   // time in milliseconds of last heart beat status change
24bool heart_beat_status  = HIGH;        // current status of heart beat, start high
25
26//
27// Function  handles the heart beat cycle.
28// May be called from anywhere, but at least every  main loop cycle.
29//
30void heart_beat() {
31  if (millis() - last_heart_beat_time  >= heart_beat_on_off_time) {
32    // time to swap status of the heart beat LED  and update it
33    last_heart_beat_time = millis();
34    heart_beat_status =  !heart_beat_status;           // invert current heart beat status value
35    digitalWrite(heart_beat_pin,  heart_beat_status);  // update LED with new status
36  }
37}
38
39void setup()  {
40  // setup heart beat
41  pinMode(heart_beat_pin, OUTPUT);
42  heart_beat_on_off_time  = heart_beat_freq / 2; // LED is on and off at 1/2 frequency time
43  // end of  heart beat setup
44}
45
46void loop() {
47  heart_beat();
48  // add your other  code here...
49
50
51}
52

1//
2// Example of a heart_beat code for use in any sketch where a visual
3  indication is
4// required that the sketch is operating.
5//
6// Ron D Bentley,
7  Stafford, UK, July 2021
8//
9// This example and code is in the public domain
10  and
11// may be used without restriction and without warranty.
12//
13// Note
14  that
15// 1. this example uses the LED_BUILTIN digital pin, normally digital pin
16  13,
17//    so no wiring or external LED is needed to implement this code.
18//
19    However, if an external LED is wished, then simply decide which digital pin
20//
21    is to be used, change to definition 'hear_beat_pin' to be this pin mumber
22//
23    and wire in the external LED.
24//
25
26#define heart_beat_pin   LED_BUILTIN
27  // digital pin for heart beat LED
28
29long unsigned heart_beat_freq = 1000;
30  // time(milliseconds) of heart beat frequency
31
32long unsigned heart_beat_on_off_time;
33  // the time the LED is on and off - 1/2 frequency
34long unsigned last_heart_beat_time;
35   // time in milliseconds of last heart beat status change
36bool heart_beat_status
37  = HIGH;        // current status of heart beat, start high
38
39//
40// Function
41  handles the heart beat cycle.
42// May be called from anywhere, but at least every
43  main loop cycle.
44//
45void heart_beat() {
46  if (millis() - last_heart_beat_time
47  >= heart_beat_on_off_time) {
48    // time to swap status of the heart beat LED
49  and update it
50    last_heart_beat_time = millis();
51    heart_beat_status =
52  !heart_beat_status;           // invert current heart beat status value
53    digitalWrite(heart_beat_pin,
54  heart_beat_status);  // update LED with new status
55  }
56}
57
58void setup()
59  {
60  // setup heart beat
61  pinMode(heart_beat_pin, OUTPUT);
62  heart_beat_on_off_time
63  = heart_beat_freq / 2; // LED is on and off at 1/2 frequency time
64  // end of
65  heart beat setup
66}
67
68void loop() {
69  heart_beat();
70  // add your other
71  code here...
72
73
74}
75