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Timeout

Table of Contents

  1. Hello World!
  2. API
  3. Examples

The Timeout interface is used to setup an interrupt to call a function after a specified delay.

Any number of Timeout objects can be created, allowing multiple outstanding interrupts at the same time.

Hello World!

A simple program to setup a Timeout to invert an LED after a given timeout...

#include "mbed.h"

Timeout flipper;
DigitalOut led1(LED1);
DigitalOut led2(LED2);

void flip() {
    led2 = !led2;
}

int main() {
    led2 = 1;
    flipper.attach(&flip, 2.0); // setup flipper to call flip after 2 seconds

    // spin in a main loop. flipper will interrupt it to call flip
    while(1) {
        led1 = !led1;
        wait(0.2);
    }
}

API

API summary

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Examples

Attaching a member function

#include "mbed.h"

// A class for flip()-ing a DigitalOut 
class Flipper {
public:
    Flipper(PinName pin) : _pin(pin) {
        _pin = 0;
    }
    void flip() {
        _pin = !_pin;
    }
private:
    DigitalOut _pin;
};

DigitalOut led1(LED1);
Flipper f(LED2);
Timeout t;

int main() {
    t.attach(&f, &Flipper::flip, 2.0); // the address of the object, member function, and interval

    // spin in a main loop. flipper will interrupt it to call flip
    while(1) {
        led1 = !led1;
        wait(0.2);
    }
}
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