Periodic Operation

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

Ethernet
Ethernet (Server)
Ethernet (Client)
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.
MsTimer2, one of types, is compatible with Arduino One described in Arduino Playground. It is necessary to specify #include <MsTimer2.h> 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 tries to use MsTimer2.

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