attachInterrupt()

Description

This command specifies a named Interrupt Service Routine (ISR) to call on when an interrupt occurs. (Note: this function will only work when the timer is in interrupt mode)

Syntax


TimerWDT.attachInterrupt(isr)
TimerWDT.attachInterrupt(isr, time)


Parameters

isr：The name of the function to be called whenever an interrupt event happens.

time：Sets time duration and interval parameters (optional) in microseconds (μs).

Return

None

Example

Set up watch dog timer in interrupt mode, LED lights on and off every 100ms:

#include <TimerWDT.h>
 
void setup() 
{
  pinMode(13, OUTPUT);
  TimerWDT.initialize(100000); // sets up 100ms time intervals.
  TimerWDT.attachInterrupt( timerIsr ); // attaches ISR, executed once every 100ms.
}
 
void loop() {}

// ISR
void timerIsr()
{
    // turns the LED lights on and off.
    digitalWrite( 13, digitalRead( 13 ) ^ 1 );
}

See also

－ detachInterrupt()

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