mbed-os-examples / Mbed OS mbed-os-example-mbed5-blinky Featured

This is a very simple guide, reviewing the steps required to get Blinky working on an Mbed OS platform.

Mbed OS Blinky

This example shows the use of a DigitalOut object to represent an LED and use of the nonblocking Thread::wait() call. Using nonblocking calls is good practice because Mbed OS can schedule and run other threads while the first thread is waiting.

Building this example

Building with Arm Mbed CLI

To use Mbed CLI to build this example, follow the instructions in the documentation. The instructions here relate to using the Arm Online Compiler.

To use the Online Compiler, import this code into the Online Compiler, and select your platform from the top right. Compile the code using the compile button, load it onto your board and press the reset button on the board. The code will run on the board, and you will see the LED blink.

You can find more instructions for using the Mbed Online Compiler in the documentation.

main.cpp@87:4c31b7ef1391, 2019-01-07 (annotated)

Committer:
mbed_official
Date:
Mon Jan 07 12:00:02 2019 +0000
Revision:
87:4c31b7ef1391
Parent:
82:abf1b1785bd7
Child:
88:bea4f2daa48c
Merge pull request #154 from deepikabhavnani/patch-1



Use `wait_ms` instead `wait`

.

Commit copied from https://github.com/ARMmbed/mbed-os-example-blinky

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 82:abf1b1785bd7 1 /* mbed Microcontroller Library
mbed_official 82:abf1b1785bd7 2 * Copyright (c) 2018 ARM Limited
mbed_official 82:abf1b1785bd7 3 * SPDX-License-Identifier: Apache-2.0
mbed_official 82:abf1b1785bd7 4 */
mbed_official 82:abf1b1785bd7 5
Jonathan Austin 0:2757d7abb7d9 6 #include "mbed.h"
mbed_official 82:abf1b1785bd7 7 #include "stats_report.h"
Jonathan Austin 0:2757d7abb7d9 8
Jonathan Austin 0:2757d7abb7d9 9 DigitalOut led1(LED1);
Jonathan Austin 0:2757d7abb7d9 10
Jonathan Austin 1:846c97078558 11 // main() runs in its own thread in the OS
mbed_official 82:abf1b1785bd7 12 int main()
mbed_official 82:abf1b1785bd7 13 {
mbed_official 82:abf1b1785bd7 14 SystemReport sys_state(500 /* Loop delay time in ms */);
mbed_official 82:abf1b1785bd7 15
Jonathan Austin 0:2757d7abb7d9 16 while (true) {
mbed_official 82:abf1b1785bd7 17 // Blink LED and wait 0.5 seconds
Jonathan Austin 0:2757d7abb7d9 18 led1 = !led1;
mbed_official 87:4c31b7ef1391 19 wait_ms(500);
mbed_official 82:abf1b1785bd7 20
mbed_official 82:abf1b1785bd7 21 // Following the main thread wait, report on the current system status
mbed_official 82:abf1b1785bd7 22 sys_state.report_state();
Jonathan Austin 0:2757d7abb7d9 23 }
Jonathan Austin 0:2757d7abb7d9 24 }