Arduino 101 Curie Timer One Interrupt

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1/*
2
3  Sketch: Timer1Interrupt.ino
4
5  This sketch demonstrates the usage of the Curie Timer One Library.
6
7  It uses timer-1 to blink the onboard LED, pin 13, at different
8
9  intervals (speed) in four steps.
10
11  You can see the time interval and the number of interrupt counted
12
13  in 10 seconds if you keep serial logging active, but this may require
14
15  a MASTER_RESET to reprogram the board.
16
17  Blinking of the LED will start only when you open the  Serial Monitor
18
19  unless you comment the "#define SERIAL_PORT_LOG_ENABLE 1"; don't
20
21  forget to uncomment "CurieTimerOne.restart(time);"
22
23  created by Intel
24
25  Modified 14 March 2016
26
27  by Simone Majocchi
28
29  This example code is in the public domain.
30
31*/
32
33#include "CurieTimerOne.h"
34
35// Comment the following statement to disable logging on serial port.
36#define SERIAL_PORT_LOG_ENABLE 1
37
38const int oneSecInUsec = 1000000;   // A second in mirco second unit.
39
40bool toggle = 0;                    // The LED status toggle
41int time;                           // the variable used to set the Timer
42
43void timedBlinkIsr()   // callback function when interrupt is asserted
44{
45
46  digitalWrite(13, toggle);
47
48  toggle = !toggle;  // use NOT operator to invert toggle value
49}
50
51void setup() {
52
53#ifdef SERIAL_PORT_LOG_ENABLE
54
55  Serial.begin(115200);  //  initialize Serial communication
56
57  while (!Serial);       //  wait for the serial monitor to open
58#endif
59
60  // Initialize pin 13 as an output - onboard LED.
61
62  pinMode(13, OUTPUT);
63}
64
65void loop() {
66
67  for (int i = 1; i < 9; i = i * 2) {
68
69    // We set a blink rate of 1000000, 500000, 250000, 125000 microseconds
70
71    time = oneSecInUsec / i; // time is used to toggle the LED is divided by i
72
73    CurieTimerOne.start(time, &timedBlinkIsr);  // set timer and callback
74
75#ifdef SERIAL_PORT_LOG_ENABLE
76
77    Serial.print("The blink period: ");
78
79    Serial.println(time);
80#endif
81
82    delay(10000);  // 10 seconds of delay, regularly 'interrupted' by the timer interrupt
83
84#ifdef SERIAL_PORT_LOG_ENABLE
85
86    Serial.print("Total number of ticks in 10 seconds: ");
87
88    Serial.println(CurieTimerOne.rdRstTickCount());  // Reads and Resets tick count
89
90    Serial.println("----");
91#endif
92
93    // Uncomment the following line if the serial logging is disabled
94
95    // CurieTimerOne.restart(time);   // Restarts Timer
96
97  }
98}