Update mbed unit testing example

Refactoring according to the latest changes in Mbed OS6

unit-testing/mbed-blink/mbed_app.json

@@ -0,0 +1,11 @@
+{
+    "requires": ["bare-metal"],
+    "target_overrides": {
+      "*": {
+        "target.c_lib": "small",
+        "target.printf_lib": "minimal-printf",
+        "platform.minimal-printf-enable-floating-point": false,
+        "platform.stdio-minimal-console-only": true
+      }
+    }
+}

unit-testing/mbed-blink/platformio.ini

@@ -15,3 +15,10 @@
 platform = ststm32
 framework = mbed
 board = nucleo_f401re
+
+[env:nucleo_f401re_legacy]
+platform = ststm32
+framework = mbed
+board = nucleo_f401re
+platform_packages =
+    framework-mbed @ ~6.51504.0

unit-testing/mbed-blink/src/main.cpp

@@ -1,18 +1,19 @@
-/*
- * Blink
- * Turns on an LED on for one second,
- * then off for one second, repeatedly.
+/* mbed Microcontroller Library
+ * Copyright (c) 2019 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 #include "mbed.h"
 
-DigitalOut myled(LED1);
+#define WAIT_TIME_MS 500 
 
-int main() {
-    while(1) {
-        myled = 1;
-        wait(1);
-        myled = 0;
-        wait(1);
+DigitalOut led1(LED1);
+
+int main()
+{
+    while (true)
+    {
+        led1 = !led1;
+        thread_sleep_for(WAIT_TIME_MS);
     }
 }

unit-testing/mbed-blink/test/test_main.cpp

@@ -28,17 +28,17 @@ DigitalOut myled(LED1);
 // }
 
 void test_pin_is_connected(void) {
-    TEST_ASSERT_EQUAL(myled.is_connected(), 1);
+    TEST_ASSERT_EQUAL(1, myled.is_connected());
 }
 
 void test_led_state_high(void) {
     myled.write(1);
-    TEST_ASSERT_EQUAL(myled.read(), 1);
+    TEST_ASSERT_EQUAL(1, myled.read());
 }
 
 void test_led_state_low(void) {
     myled.write(0);
-    TEST_ASSERT_EQUAL(myled.read(), 0);
+    TEST_ASSERT_EQUAL(0, myled.read());
 }
 
 int main() {
@@ -47,9 +47,9 @@ int main() {
 
     for (int i = 0; i < 5; ++i){
         RUN_TEST(test_led_state_high);
-        wait_ms(500);
+        thread_sleep_for(500);
         RUN_TEST(test_led_state_low);
-        wait_ms(500);
+        thread_sleep_for(500);
         i++;
     }