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@4:de061b559d35, 2017-06-23 (annotated)

Committer:
sarahmarshy
Date:
Fri Jun 23 18:04:32 2017 -0500
Revision:
4:de061b559d35
Parent:
3:f729f0421740 
"Update mbed-os"

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbedAustin 2:dc8472f90484 1 /* mbed Example Program
mbedAustin 2:dc8472f90484 2 * Copyright (c) 2006-2014 ARM Limited
mbedAustin 2:dc8472f90484 3 *
mbedAustin 2:dc8472f90484 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbedAustin 2:dc8472f90484 5 * you may not use this file except in compliance with the License.
mbedAustin 2:dc8472f90484 6 * You may obtain a copy of the License at
mbedAustin 2:dc8472f90484 7 *
mbedAustin 2:dc8472f90484 8 * http://www.apache.org/licenses/LICENSE-2.0
mbedAustin 2:dc8472f90484 9 *
mbedAustin 2:dc8472f90484 10 * Unless required by applicable law or agreed to in writing, software
mbedAustin 2:dc8472f90484 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbedAustin 2:dc8472f90484 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbedAustin 2:dc8472f90484 13 * See the License for the specific language governing permissions and
mbedAustin 2:dc8472f90484 14 * limitations under the License.
mbedAustin 2:dc8472f90484 15 */
mbed_official 0:7a20a6aa1f5e 16 #include "mbed.h"
mbed_official 0:7a20a6aa1f5e 17
mab5449 3:f729f0421740 18 InterruptIn button(SW2);
mbed_official 0:7a20a6aa1f5e 19 DigitalOut led(LED1);
mbed_official 0:7a20a6aa1f5e 20 DigitalOut flash(LED4);
mbed_official 0:7a20a6aa1f5e 21
mbed_official 0:7a20a6aa1f5e 22 void flip() {
mbed_official 0:7a20a6aa1f5e 23 led = !led;
mbed_official 0:7a20a6aa1f5e 24 }
mbed_official 0:7a20a6aa1f5e 25
mbed_official 0:7a20a6aa1f5e 26 int main() {
mbed_official 0:7a20a6aa1f5e 27 button.rise(&flip); // attach the address of the flip function to the rising edge
mbed_official 0:7a20a6aa1f5e 28 while(1) { // wait around, interrupts will interrupt this!
mbed_official 0:7a20a6aa1f5e 29 flash = !flash;
mbed_official 0:7a20a6aa1f5e 30 wait(0.25);
mbed_official 0:7a20a6aa1f5e 31 }
mbed_official 0:7a20a6aa1f5e 32 }