University of Plymouth - Stages 1, 2 and 3 / Mbed OS Task322Solution

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Fork of Task322Solution by Nicholas Outram

main.cpp@0:363a62c6c97c, 2015-09-24 (annotated)

Committer:
noutram
Date:
Thu Sep 24 12:25:31 2015 +0000
Revision:
0:363a62c6c97c
Initial version 24-09-2015

Who changed what in which revision?

UserRevisionLine numberNew contents of line
noutram 0:363a62c6c97c 1 #include "mbed.h"
noutram 0:363a62c6c97c 2
noutram 0:363a62c6c97c 3 DigitalOut red_led(D7);
noutram 0:363a62c6c97c 4 DigitalOut yellow_led(D6);
noutram 0:363a62c6c97c 5 DigitalOut green_led(D5);
noutram 0:363a62c6c97c 6 DigitalIn SW1(D4);
noutram 0:363a62c6c97c 7
noutram 0:363a62c6c97c 8 //This is the solution based on the proposed flowchart.
noutram 0:363a62c6c97c 9 //It is flawed however (see next exercise) due to
noutram 0:363a62c6c97c 10 //switch bounce.
noutram 0:363a62c6c97c 11
noutram 0:363a62c6c97c 12 int main() {
noutram 0:363a62c6c97c 13
noutram 0:363a62c6c97c 14 //Switch on Yellow and Green to indicate
noutram 0:363a62c6c97c 15 //that the code is running
noutram 0:363a62c6c97c 16 yellow_led = 1;
noutram 0:363a62c6c97c 17 green_led = 1;
noutram 0:363a62c6c97c 18 red_led = 0; //Set RED LED to OFF
noutram 0:363a62c6c97c 19
noutram 0:363a62c6c97c 20 // Wait for SW1 to be pressed
noutram 0:363a62c6c97c 21 while (SW1 == 0) { }
noutram 0:363a62c6c97c 22
noutram 0:363a62c6c97c 23 // Wait for SW1 to be released
noutram 0:363a62c6c97c 24 while (SW1 == 1) { }
noutram 0:363a62c6c97c 25
noutram 0:363a62c6c97c 26 red_led = 1; //Turn ON LED
noutram 0:363a62c6c97c 27
noutram 0:363a62c6c97c 28 while (1) { } //Repeat forever
noutram 0:363a62c6c97c 29 }