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 98:f2d7e14c84a1, committed 2019-09-04

Comitter:
mbed_official
Date:
Wed Sep 04 12:00:04 2019 +0100
Parent:
97:d180a47a5804
Child:
99:394543729870
Commit message:
Merge pull request #186 from hugueskamba/hk-fix-warnings

Clear all warnings generated by the example project files.
.
Commit copied from https://github.com/ARMmbed/mbed-os-example-blinky

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file
stats_report.h Show annotated file Show diff for this revision Revisions of this file 
--- a/main.cpp	Tue Jul 23 12:00:36 2019 +0100
+++ b/main.cpp	Wed Sep 04 12:00:04 2019 +0100
@@ -4,6 +4,7 @@
  */
 
 #include "mbed.h"
+#include "ThisThread.h"
 #include "stats_report.h"
 
 DigitalOut led1(LED1);
@@ -20,7 +21,7 @@
     while (true) {
         // Blink LED and wait 0.5 seconds
         led1 = !led1;
-        wait_ms(SLEEP_TIME);
+        ThisThread::sleep_for(SLEEP_TIME);
 
         if ((0 == count) || (PRINT_AFTER_N_LOOPS == count)) {
             // Following the main thread wait, report on the current system status

--- a/stats_report.h	Tue Jul 23 12:00:36 2019 +0100
+++ b/stats_report.h	Wed Sep 04 12:00:04 2019 +0100
@@ -4,8 +4,9 @@
  */
 
 #ifndef STATS_REPORT_H
-#define STATS_REPORT
+#define STATS_REPORT_H
 
+#include <inttypes.h>
 #include "mbed.h"
 
 /**
@@ -37,19 +38,19 @@
         mbed_stats_sys_get(&sys_stats);
 
         printf("=============================== SYSTEM INFO  ================================\r\n");
-        printf("Mbed OS Version: %ld \r\n", sys_stats.os_version);
-        printf("CPU ID: 0x%lx \r\n", sys_stats.cpu_id);
+        printf("Mbed OS Version: %" PRIu32 " \r\n", sys_stats.os_version);
+        printf("CPU ID: 0x%" PRIx32 " \r\n", sys_stats.cpu_id);
         printf("Compiler ID: %d \r\n", sys_stats.compiler_id);
-        printf("Compiler Version: %ld \r\n", sys_stats.compiler_version);
+        printf("Compiler Version: %" PRIu32 " \r\n", sys_stats.compiler_version);
 
         for (int i = 0; i < MBED_MAX_MEM_REGIONS; i++) {
             if (sys_stats.ram_size[i] != 0) {
-                printf("RAM%d: Start 0x%lx Size: 0x%lx \r\n", i, sys_stats.ram_start[i], sys_stats.ram_size[i]);
+                printf("RAM%d: Start 0x%" PRIx32 " Size: 0x%" PRIx32 " \r\n", i, sys_stats.ram_start[i], sys_stats.ram_size[i]);
             }
         }
         for (int i = 0; i < MBED_MAX_MEM_REGIONS; i++) {
             if (sys_stats.rom_size[i] != 0) {
-                printf("ROM%d: Start 0x%lx Size: 0x%lx \r\n", i, sys_stats.rom_start[i], sys_stats.rom_size[i]);
+                printf("ROM%d: Start 0x%" PRIx32 " Size: 0x%" PRIx32 " \r\n", i, sys_stats.rom_start[i], sys_stats.rom_size[i]);
             }
         }
     }
@@ -104,8 +105,8 @@
         // Collect and print heap stats
         mbed_stats_heap_get(&heap_stats);
 
-        printf("Current heap: %lu\r\n", heap_stats.current_size);
-        printf("Max heap size: %lu\r\n", heap_stats.max_size);
+        printf("Current heap: %" PRIu32 "\r\n", heap_stats.current_size);
+        printf("Max heap size: %" PRIu32 "\r\n", heap_stats.max_size);
     }
 
     /**
@@ -119,12 +120,12 @@
         int count = mbed_stats_thread_get_each(thread_stats, max_thread_count);
 
         for (int i = 0; i < count; i++) {
-            printf("ID: 0x%lx \r\n",        thread_stats[i].id);
-            printf("Name: %s \r\n",         thread_stats[i].name);
-            printf("State: %ld \r\n",       thread_stats[i].state);
-            printf("Priority: %ld \r\n",    thread_stats[i].priority);
-            printf("Stack Size: %ld \r\n",  thread_stats[i].stack_size);
-            printf("Stack Space: %ld \r\n", thread_stats[i].stack_space);
+            printf("ID: 0x%" PRIx32 " \r\n",        thread_stats[i].id);
+            printf("Name: %s \r\n",               thread_stats[i].name);
+            printf("State: %" PRIu32 " \r\n",       thread_stats[i].state);
+            printf("Priority: %" PRIu32 " \r\n",    thread_stats[i].priority);
+            printf("Stack Size: %" PRIu32 " \r\n",  thread_stats[i].stack_size);
+            printf("Stack Space: %" PRIu32 " \r\n", thread_stats[i].stack_space);
         }
     }
 };