Periodic Operation

Digital I/O
Analog I/O
Advanced I/O
Time
Math
Trigonometry
Random Numbers
Bits and Bytes
Interrupts
Serial Comm.

Servo Motor
Character LCD
SPI
I²C (Wire)
SD Card
SD (File Operations)
Periodic Operation
Clock (RTC)

This library allows users to call a function periodically. Three types of timers are prepared. MsTimer2, one of types, is compatible with Arduino One described in Arduino Playground.

It is necessary to specify #include for using MsTimer2.

MsTimer2::set

Description

Specifies a call back function executed in the specified interval timer interrupt handler.

Syntax

MsTimer2::set(unsigned long ms, void (*function)())

Parameters

ms: Interval(ms)
function: Function name

Returns

None

Notes

The handler is executed by disabled interrupt. In case of executing with use of interrupt, permit an interrupt by interrupt().

MsTimer2::start

Description

Start the timer after set

Syntax

MsTimer2::start()

Parameters

None

Returns

None

MsTimer2::stop

Description

Stop the timer

Syntax

MsTimer2::stop()

Parameters

None

Returns

None

This sample uses MsTimer2.

#include <Arduino.h>
#include <MsTimer2.h>
void using_mstimer2() {
  static boolean output = HIGH;
  digitalWrite(PIN_LED0, output);
  output = !output;
}
  
void setup() {
  pinMode(PIN_LED0, OUTPUT);
  
  MsTimer2::set(100, using_mstimer2); // 500ms period
  MsTimer2::start();
  
}
  
void loop() {
}