mbed_example / Mbed OS InterruptIn_HelloWorld

Hello World for InterruptIn

Fork of InterruptIn_HelloWorld by Mbed

Use

Interrupts are a way of causing a function to be called when a certain event happens. This example demonstrates calling a function when a button is pressed. Specifically on the rising edge of a button press. This can be observed by LED4 blinking as the program runs and LED1 only changing when the button is pressed.

API

API reference.

Import librarymbed

No documentation found.

main.cpp

Committer:
sarahmarshy
Date:
2017-06-23
Revision:
4:de061b559d35
Parent:
3:f729f0421740

File content as of revision 4:de061b559d35:

/* mbed Example Program
 * Copyright (c) 2006-2014 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include "mbed.h"
 
InterruptIn button(SW2);
DigitalOut led(LED1);
DigitalOut flash(LED4);
 
void flip() {
    led = !led;
}
 
int main() {
    button.rise(&flip);  // attach the address of the flip function to the rising edge
    while(1) {           // wait around, interrupts will interrupt this!
        flash = !flash;
        wait(0.25);
    }
}