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@0:7a20a6aa1f5e, 2013-02-15 (annotated)

Committer:
mbed_official
Date:
Fri Feb 15 15:13:19 2013 +0000
Revision:
0:7a20a6aa1f5e
Child:
2:dc8472f90484
Hello World for InteruptIn

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:7a20a6aa1f5e 1 #include "mbed.h"
mbed_official 0:7a20a6aa1f5e 2
mbed_official 0:7a20a6aa1f5e 3 InterruptIn button(p5);
mbed_official 0:7a20a6aa1f5e 4 DigitalOut led(LED1);
mbed_official 0:7a20a6aa1f5e 5 DigitalOut flash(LED4);
mbed_official 0:7a20a6aa1f5e 6
mbed_official 0:7a20a6aa1f5e 7 void flip() {
mbed_official 0:7a20a6aa1f5e 8 led = !led;
mbed_official 0:7a20a6aa1f5e 9 }
mbed_official 0:7a20a6aa1f5e 10
mbed_official 0:7a20a6aa1f5e 11 int main() {
mbed_official 0:7a20a6aa1f5e 12 button.rise(&flip); // attach the address of the flip function to the rising edge
mbed_official 0:7a20a6aa1f5e 13 while(1) { // wait around, interrupts will interrupt this!
mbed_official 0:7a20a6aa1f5e 14 flash = !flash;
mbed_official 0:7a20a6aa1f5e 15 wait(0.25);
mbed_official 0:7a20a6aa1f5e 16 }
mbed_official 0:7a20a6aa1f5e 17 }