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.

Files at this revision

API Documentation at this revision

Revision 1:846c97078558, committed 2016-07-28

Comitter:
Jonathan Austin
Date:
Thu Jul 28 16:32:52 2016 +0100
Parent:
0:2757d7abb7d9
Child:
2:8834f9351e9b
Commit message:
Update example to https://github.com/ARMmbed/mbed-os-example-blinky at tag mbed-os-5.1.0-rc3

Changed in this revision

README.md Show annotated file Show diff for this revision Revisions of this file
img/uvision.png Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed-os.lib Show annotated file Show diff for this revision Revisions of this file 
--- a/README.md	Thu Jul 28 13:52:35 2016 +0100
+++ b/README.md	Thu Jul 28 16:32:52 2016 +0100
@@ -41,7 +41,7 @@
 Total Static RAM memory (data + bss): 7168 bytes
 Total RAM memory (data + bss + heap + stack): 7168 bytes
 Total Flash memory (text + data + misc): 43402 bytes
-Image: .\.build\K64F\ARM\mbed-os-example-blinky.bin             
+Image: .\.build\K64F\ARM\mbed-os-example-blinky.bin
 ```
 
 ### Program your board
@@ -59,7 +59,7 @@
 From the command line, run the following command:
 
 ```
-mbed export -m K64F -i uvision -n mbed-os-example-blinky
+mbed export -m K64F -i uvision
 ```
 
 You should see the following output:

Binary file img/uvision.png has changed

--- a/main.cpp	Thu Jul 28 13:52:35 2016 +0100
+++ b/main.cpp	Thu Jul 28 16:32:52 2016 +0100
@@ -2,20 +2,13 @@
 #include "rtos.h"
 
 DigitalOut led1(LED1);
-DigitalOut led2(LED2);
 
-void led2_thread(void const *args) {
-    while (true) {
-        led2 = !led2;
-        Thread::wait(1000);
-    }
-}
-
+// main() runs in its own thread in the OS
+// (note the calls to Thread::wait below for delays)
 int main() {
-    Thread thread(led2_thread);
-
     while (true) {
         led1 = !led1;
         Thread::wait(500);
     }
 }
+

--- a/mbed-os.lib	Thu Jul 28 13:52:35 2016 +0100
+++ b/mbed-os.lib	Thu Jul 28 16:32:52 2016 +0100
@@ -1,1 +1,1 @@
-https://github.com/mbedmicro/mbed#5fea6e69ec1aec4c56852f2e959002dc815eb480
+https://github.com/mbedmicro/mbed/#36468c9acbfeabb717d2cc7d2a7ea7d17df1ac09