Basic Library

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

Standard Library

Ethernet
Servo Motor
Stepping Motor
Character LCD
SPI
I2C (Wire)
SD Card
SD (File Operations)
Periodic Operation
Clock (RTC)
PPG (Pulse Generator)
WiFiEsp
ICS (Serial Servo)

FreeRTOS Tips

Overview
Task
Queue
Timer
Interrupt Management

Periodic Operation (MSTimer2)

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 <mstimer2.h> for use 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

Sample Program

This sample tries to use MsTimer2


#include <Arduino.h>
#include <MsTimer2.h>
int ledpin = PIN_LED1;
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() {
}